CN113890355B

CN113890355B - System, method, driving circuit and chip adapted to wide voltage input

Info

Publication number: CN113890355B
Application number: CN202010636258.6A
Authority: CN
Inventors: 费小泂; 孟豪
Original assignee: Cool Silicon Semiconductor Technology Shanghai Co ltd
Current assignee: Cool Silicon Semiconductor Technology Shanghai Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2025-03-07
Anticipated expiration: 2040-07-03
Also published as: CN113890355A

Abstract

The present invention relates to a system, method, driving circuit and chip that are adapted to wide voltage input. A DC voltage source supplies power to a plurality of power consumption units connected in series. The power consumption unit includes a power input terminal and a potential reference terminal, and the power consumption unit has a voltage regulating module arranged between the power input terminal and the potential reference terminal. There is a voltage drop between the power input terminal and the potential reference terminal of each power consumption unit. When the voltage of the DC voltage source increases from low to high, the voltage regulating module of each power consumption unit controls its own voltage drop to increase. When the voltage of the DC voltage source decreases from high to low, the voltage regulating module of each power consumption unit exits the control of its own voltage drop.

Description

System and method for adapting to wide voltage input, driving circuit and chip

Technical Field

The invention relates to the field of electric power energy, in particular to a system and a method for adapting to wide voltage input, and a driving circuit and a chip for adapting to the wide voltage input.

Background

For the application scene of electric power energy such as alternating current commercial power, most occasions are to rectify alternating current commercial power into pulsating direct current in advance and to reuse a filter capacitor to stabilize the pulsating direct current, and the direct current voltage with fewer ripples output by the filter capacitor is provided for various loads. Usually, the DC voltage of the filter capacitor is further boosted or down converted to form voltages with different levels for the load in cooperation with the DC-DC converter. This relates to passive or active power factor correction and to how to improve the total harmonic distortion and to pulse width modulation of switching power supplies. The filter capacitor of the conventional electrolytic capacitor is large in size and high in price, the converter also has the characteristics of low element efficiency and complex modulation, and a power supply scheme capable of combining pulsating voltage and stable voltage needs to be designed to replace the complicated link of the traditional power application technology.

Disclosure of Invention

The application relates to a system for adapting to a wide voltage input, comprising:

A plurality of power utilization units connected in series, wherein a direct-current voltage source supplies power to the plurality of power utilization units connected in series;

The power utilization unit comprises a power input end and a potential reference end, wherein the power input end of the next power utilization unit is coupled to the potential reference end of the adjacent previous power utilization unit in a plurality of power utilization units connected in series;

the power utilization unit is provided with a voltage regulation module arranged between a power input end and a potential reference end;

a voltage drop exists between the power input end and the potential reference end of each power utilization unit;

In the stage of increasing voltage of DC voltage source from low to high, the voltage regulating module of each power utilization unit can control its voltage drop to raise or

In the stage that the voltage of the direct-current voltage source is reduced from high to low, the voltage regulating module of each power utilization unit exits from controlling the voltage drop of the power utilization unit.

According to the system suitable for wide voltage input, alternating current is rectified by the rectifier to obtain a direct current voltage source.

The power utilization unit is a driving circuit capable of providing constant current for a load to implement constant current driving on the load, the power utilization unit is provided with constant current units for generating constant current, and the load and the constant current units are connected in series between a power input end and a potential reference end in each power utilization unit.

The voltage regulating module comprises a voltage divider arranged between a power input end and a potential reference end, a first resistor, a switch and a voltage stabilizing diode which are connected in series between the power input end and the potential reference end, a comparator with an output end coupled to a control end of the switch, wherein the comparator compares the voltage dividing value with a threshold voltage, the switch is turned on when the voltage dividing value exceeds the threshold voltage, the voltage stabilizing diode is turned on, and the switch is turned off when the voltage dividing value is lower than the threshold voltage.

The voltage regulating module comprises a second resistor, a zener diode and a junction field effect transistor which are connected in series between a power input end and a potential reference end, wherein the zener diode and the second resistor are connected in series between a first end of the junction field effect transistor and the power input end, a control end of the junction field effect transistor is coupled to the potential reference end, and a second end of the junction field effect transistor is coupled to the potential reference end through the clamping resistor.

In the system adapting to wide voltage input, the voltage drop of any one of the power utilization units is not lower than a critical voltage, so that the zener diode is reversely broken down, and the voltage regulation module of any one of the power utilization units is connected;

When the voltage of any one of the power utilization units is lower than the critical voltage, the zener diode is cut off, and the voltage regulation module of any one of the power utilization units is turned off.

The system for adapting to wide voltage input, the voltage regulating module comprises:

the voltage divider is arranged between the power input end and the potential reference end, samples the voltage drop and obtains a divided voltage value;

A third resistor and a current source connected in series between the power input end and the potential reference end;

And a comparator for determining whether the current source is turned on, comparing the divided value with a threshold voltage, turning on the current source when the divided value exceeds the threshold voltage, and turning off the current source when the divided value is lower than the threshold voltage.

The voltage regulating module comprises a fourth resistor, a zener diode and a current source which are connected in series between the power input end and the potential reference end, wherein the voltage drop of any power utilization unit is only when the voltage drop is not lower than the critical voltage and the zener diode breaks down reversely to be conducted, and the current source is turned on, otherwise, the current source is turned off.

The application relates to a method for adapting to wide voltage input, which is characterized in that:

Connecting a plurality of power utilization units in series;

The method comprises applying a DC voltage source rectified by AC to a plurality of power utilization units to realize power supply;

The voltage regulating module of each power utilization unit is forced to adaptively raise the voltage drop along with the increase of the voltage of the direct-current voltage source from low to high, so that the voltage of the direct-current voltage source is uniformly distributed to each power utilization unit, or

The voltage regulation module of each power utilization unit is forced to adaptively pull down the voltage drop along with the voltage reduction of the direct-current voltage source from high to low.

In the above method, the voltage adjusting module includes:

The first resistor, the switch and the zener diode are connected in series between the power input end and the potential reference end;

A comparator having an output coupled to a control of the switch, the comparator comparing the divided value with a threshold voltage and turning on the switch and turning on the zener diode when the divided value exceeds the threshold voltage;

And when the divided voltage value is lower than the threshold voltage, the switch is turned off.

In the above method, the voltage adjusting module includes:

A second resistor, a zener diode, a junction field effect transistor connected in series between the power input terminal and the potential reference terminal;

the zener diode and the second resistor are connected in series between the first end of the junction field effect transistor and the power input end;

The control terminal of the junction field effect transistor is coupled to the potential reference terminal and the second terminal of the junction field effect transistor is coupled to the potential reference terminal through a clamp resistor.

In the above method, the voltage adjusting module includes:

a fourth resistor, a zener diode and a current source which are connected in series between the power input end and the potential reference end;

the voltage drop of any one of the power utilization units is only when the voltage drop is not lower than a critical voltage, so that the zener diode is reversely broken down to be conducted, and otherwise, the current source is turned on.

In the method, the power utilization unit is provided with a constant current unit which can supply constant current to the load, and the constant current unit and the load are connected in series between the power input end and the potential reference end.

The application relates to a driving circuit adapting to wide voltage input, comprising:

A power supply input terminal and a potential reference terminal;

The constant current unit is used for providing constant current and is arranged between the power input end and the potential reference end;

A voltage regulation module arranged between the power input end and the potential reference end;

On the premise that a plurality of driving circuits are connected in series, a direct-current voltage source supplies power to the driving circuits;

a voltage drop exists between the power input end and the potential reference end of each driving circuit;

in the stage of increasing voltage of DC voltage source from low to high, the voltage regulating module of each driving circuit can control its voltage drop to raise or

In the stage that the voltage of the direct-current voltage source is reduced from high to low, the voltage regulating module of each driving circuit exits from controlling the voltage drop of the driving circuit.

The above-mentioned driving circuit that adapts to wide voltage input, the voltage regulation module includes:

The voltage drop of any one of the driving circuits is such that the current source is turned on only when not lower than a threshold voltage, such that the zener diode is reverse-broken down to be turned on, otherwise the current source is turned off.

The driving circuit adapting to wide voltage input comprises a plurality of light emitting diodes connected in series to form a light emitting diode group string;

The driving circuits are also connected in series with one or more groups of the LED group strings, and the driving circuits are powered by a direct current voltage source and the LED group strings are powered by one or more groups of the LED group strings.

The driving circuits are also connected in series with one or more groups of LED group strings, and a direct current voltage source supplies power to the driving circuits and one or more groups of LED group strings;

In the plurality of driving circuits connected in series, the power input terminal of the latter driving circuit is directly coupled to the potential reference terminal of the former driving circuit, or the power input terminal of the latter driving circuit is indirectly coupled to the potential reference terminal of the former driving circuit through the light emitting diode group string.

the LED group strings are alternately distributed among the driving circuits, or the driving circuits are alternately distributed among a plurality of groups of LED group strings.

the total current flowing in from the power supply input terminal of each of the driving circuits and flowing out from the potential reference terminal of each of the driving circuits also flows through each of the light emitting diode group strings.

In the driving circuit adapted to the wide voltage input, in each driving circuit, the load and the constant current unit are connected in series between the power supply input terminal and the potential reference terminal.

In the driving circuits adapting to wide voltage input, a load and a constant current unit are connected in series between a power input end and a potential reference end, or in the driving circuits, the constant current unit is directly connected between the power input end and the potential reference end.

The application relates to a chip adapting to wide voltage input, which is characterized by comprising a driving circuit adapting to wide voltage input.

A power supply input terminal and a potential reference terminal;

When the voltage of the direct-current voltage source is not lower than a preset voltage value, the voltage regulating module of each driving circuit controls the voltage drop of the driving circuit to be raised, or

When the voltage of the direct-current voltage source is lower than the preset voltage value, the voltage regulating module of each driving circuit does not control the voltage drop of the driving circuit.

According to the driving circuit adapting to the wide voltage input, the direct-current voltage source in the form of pulsating voltage is obtained after alternating current is rectified by the rectifier, or the direct-current voltage source is stable voltage in the form of non-pulsating voltage.

A power supply input terminal and a potential reference terminal;

the constant current unit is used for providing constant current, and the constant current unit and the load are arranged between the power input end and the potential reference end;

the voltage regulation module includes:

A power supply input terminal and a potential reference terminal;

the voltage regulation module includes:

A power supply input terminal and a potential reference terminal;

the voltage regulation module includes:

A comparator that determines whether the current source is turned on, compares the divided value with a threshold voltage, and turns on the current source when the divided value exceeds the threshold voltage;

And when the divided voltage value is lower than the threshold voltage, the current source is turned off.

A power supply input terminal and a potential reference terminal;

the voltage regulation module includes:

The voltage drop of any one of the driving circuits is only when the voltage drop is not lower than a critical voltage, so that the zener diode breaks down reversely to be conducted, and otherwise, the current source is turned off.

Drawings

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized below, may be had by reference to the appended drawings.

Fig. 1 is a schematic diagram of a voltage converter providing an output voltage for powering a plurality of power consuming units in parallel.

Fig. 2 is a schematic diagram of a voltage converter providing an output voltage for powering a plurality of power consuming units in series.

Fig. 3 is a schematic diagram of a direct mains rectified pulsating direct current power supply for a plurality of power units in series.

Fig. 4 shows an abnormal situation in which a plurality of power utilization units in a series form have maldistribution of voltage drop.

Fig. 5 is an example of a voltage regulation module that introduces an adjustable voltage drop in each powered unit.

Fig. 6 is an alternative example of a voltage regulation module with a switch and voltage comparator and voltage divider.

Fig. 7 is an embodiment of a voltage regulation module with a junction field effect transistor and a zener diode.

Fig. 8 is an alternative example of having the voltage of the pulsating direct current evenly distributed to the individual power usage units.

Fig. 9 is a rough current waveform through multiple power usage units in series under pulsating dc conditions.

Fig. 10 is an alternative example of a voltage regulation module with a current source and voltage comparator and a voltage divider.

Fig. 11 is an alternative example of a voltage regulation module with a current source and zener diode but without a voltage divider.

FIG. 12 is an embodiment in which multiple broken-up driver circuits are serially connected to one or more LED strings.

FIG. 13 is an embodiment in which some of the undispersed driving circuitry is connected in series with multiple LED strings.

Detailed Description

The following will provide a clear and complete description of the aspects of the invention in connection with various embodiments. All solutions obtained by a person skilled in the art without making any inventive effort fall within the scope of protection of the present invention.

Referring to fig. 1, the core function of the voltage converter DC is to convert a voltage of one level to a desired target voltage level through a different form of topology. The voltage converter DC performs voltage conversion and provides a stable output voltage to power the plurality of power using units 100 connected in parallel. The voltage converter DC, also called a switching converter, may be a topology such as a buck converter or a boost converter or a CUK or SEPIC or ZETA or buck-boost converter, the circuit topology for voltage conversion mentioned here belongs in the industry to a so-called non-isolated voltage converter.

Referring to fig. 1, the power input VCC and the potential reference GND of the power unit 100 are coupled to the positive pole VP and the negative pole VN, respectively, of the power supply provided by the voltage converter. The same voltage conversion purpose can be achieved by the isolated voltage converter instead of the non-isolated voltage converter without being limited to the non-isolated voltage converter, but the isolated voltage converter needs to use a high frequency transformer to transfer energy. Even an alternating current switching power supply can be used for replacing a non-isolated voltage converter or an isolated voltage converter. The non-isolated voltage converter or the isolated voltage converter belongs to a dc switching power supply and is used for realizing dc to dc conversion, and the ac switching power supply suitable for ac mains supply conversion scenes can also realize ac to dc conversion and provide stable dc output voltage to a plurality of power utilization units 100.

Referring to fig. 1, a power input terminal VCC is generally defined as a power supply terminal of each functional module in the power consumption unit 100, and a total input current flows from the power input terminal VCC. The potential reference GND opposite to this is generally defined as the potential reference ground of the power unit 100, from which the total output current flows. The parallel connection of the power units 100 has the negative effect that the power supply buses at the positive pole VP and the negative pole VN of the power supply need to provide a channel or path for the current to flow for all the power units 100, and if the number of the power units 100 is larger, the current value of the current flowing on the power supply buses is larger and the metal power supply buses of copper foil type have to be prepared quite thick.

Referring to fig. 2, in view of the disadvantage that the parallel connection of the power utilization units 100 may cause excessive current on the power supply bus, especially the voltage withstand capability of the single power utilization unit 100 is low so that the voltage between the positive electrode VP and the negative electrode VN cannot be excessive, the voltage converter DC that functions as voltage regulation is necessary at this time. If a plurality of power utilization units 100 are modified from a parallel connection structure to a series connection structure as shown in the figure, the series connection structure greatly reduces the current pressure of the power supply bus on the premise that the total number of the power utilization units 100 is the same. Yet another important advantage of the series connection of the power consuming units 100 is to allow the voltage between the supply positive VP and the negative VN to be closer to the effective value or peak-to-valley value of the alternating current, which is significant for the voltage converter DC omitting the intermediate link. Since discarding the voltage converter DC corresponds to actively discarding the voltage regulation function for the power supply, even if the voltage drop of each power unit 100 is low, the total voltage of the power units 100 connected in series, which are superimposed on each other, approaches the level of the alternating current, in other words, the power units 100 connected in series are naturally equivalent to a voltage conversion device.

Referring to fig. 2, a plurality of power consuming units 100 are arranged in one or more columns on a power supply path. The power supply input VCC of the first power utilization unit 100 in each column as the head of the column is coupled to the power supply positive pole VP, while the potential reference GND of the last power utilization unit 100 as the tail of the column is coupled to the power supply negative pole VN. The power input terminal of the latter power unit is also arranged in each column to be coupled to the potential reference terminal of the former power unit. In the present example, the power supply input VCC of a second power consumer unit 100 is coupled to the current outlet, i.e. the potential reference GND, of an adjacent first power consumer unit 100, as in the first column. The power supply input VCC of the third power utilization unit 100 is connected to the current outflow end, i.e., the potential reference end GND, of the adjacent second power utilization unit 100 in the first column. And, for example, the power supply input VCC of the fourth power consumer unit 100 can be coupled to the current outlet, i.e. the potential reference GND, of the adjacent third power consumer unit 100 in the first column. The power supply input VCC of the last power consumer unit 100 in the first column is coupled to the current outlet of the penultimate power consumer unit 100, i.e. to the potential reference GND. For example, the power supply input VCC of the next to last power consumer unit 100 can be arranged in the first column and coupled to the current outlet of the next to last power consumer unit 100, i.e. the potential reference GND. It can be seen that the power input terminals of the rear driving chips of each of the plurality of power utilization units are coupled to the potential reference terminals of the adjacent front power utilization units in the power supply system until all the power utilization units in each of the plurality of power utilization units are connected in series or superimposed between the positive electrode VP and the negative electrode VN of the external power supply. As a voltage stabilizing option, a capacitor CZ can be provided between the power supply input VCC and the potential reference GND of each power consumer unit. The total output current of the previous power utilization unit is considered as the total input current of the next power utilization unit in each column, or the total input current of all power utilization units in each column is considered to be equal, which is determined by the serial structure of all power utilization units.

Referring to fig. 2, the voltage converter DC is regarded as a power supply device or a direct current power source, and the power consumption unit 100 is a consumer and is correspondingly regarded as a power unit or a power consumption unit. A plurality of power units 100 are connected in series between the positive pole VP and the negative pole VN of the dc power supply provided by the voltage converter. The power switches necessary for the voltage converter DC, which are necessarily subject to electromagnetic and radio frequency interference due to the need to implement pulse width modulation, often use various auxiliary circuits for their voltage conversion purposes, which are inherent limitations of the voltage converter DC.

Referring to fig. 3, the rectifier 200 is exemplified as a bridge rectifier, and may rectify alternating current into direct current. The industry's so-called rectification includes full wave rectification and half wave rectification. And rectifying by a bridge rectifier to obtain the pulsating direct current VDC. If the voltage converter is eliminated and the pulsating direct current VDC is directly applied to the power unit 100 in the power supply and single system, the above-described drawbacks and disadvantages of the voltage converter are readily resolved. On the premise that the supply voltage between the positive pole VP and the negative pole VN in fig. 1 and 2 is stable, the power consumption unit 100 is usually provided with a voltage stabilizing module, so that the voltage drop between the power supply input VCC and the so-called potential reference GND is approximately a fixed value. In fig. 3, the supply voltage between the positive pole VP and the negative pole VN is not stable, and the voltage stabilizing module of the power consumption unit 100 becomes a latch, so that the voltage drop between the power supply input VCC and the so-called potential reference GND has no adaptive regulation capability and needs to be removed.

Referring to fig. 3, the pulsating direct current VDC is regarded as a direct current power supply, and the power consuming unit 100 is still a consumer and is correspondingly regarded as a power unit or a power consuming unit. The power utilization units 100 are connected in series between the positive pole VP and the negative pole VN of a dc power source such as pulsating dc VDC. It should be noted that the voltage and direction of the DC power supplied by the voltage converter DC are hardly changed with time, and the voltage and direction of the DC power supplied by the pulsating DC VDC are changed with time, but the direction is unchanged. The total current IS or cascode current characterizes the current flowing through all the power consuming units 100. The total output current of the previous power utilization unit 100 in each column is regarded as the total input current of the next power utilization unit 100, and the total input currents of all power utilization units 100 are equal.

Referring to fig. 4, a significant feature of the pulsating direct current VDC resulting from the rectification of the alternating current VAC is that the voltage always changes with time. The voltage drop experienced across each power utilization unit 100 tends to exhibit non-linear characteristics in response to voltage variations in the pulsating direct current VDC. The positive integer N is greater than 1, and N power consuming units 100 are connected in series between the positive pole VP and the negative pole VN of a power source such as pulsating direct current VDC. The voltage drop experienced by the first power unit 100 itself is DIV1, the voltage drop experienced by the second power unit 100 itself is DIV2, and so on until the so-called nth power unit 100 itself is DIVN. The voltage difference between the voltage drops DIV1, DIV2, DIVN is very small when the voltage value of the pulsating direct current VDC is not very large, such as near the valley, so as not to affect the normal operation of the power consuming unit 100. But once the voltage value of the pulsating direct current VDC increases slightly, such as from around the valley, the voltage drops DIV1, DIV2, and the voltage difference between DIVN increases to adversely affect the normal operation of the power utilization unit 100.

Referring to fig. 4, the sum of voltage drops of the respective power utilization units 100 is a voltage of the pulsating direct current VDC. Expressed as a function, i.e., the sum of the voltage drops div1+div2+ & gt. The figure is purposely drawn with a shaded portion of the pulsating direct current VDC, which indicates that the voltage value of the pulsating direct current VDC has increased enough to make a large voltage difference between the series voltage drops DIV1, DIV 2. For example, resulting in voltage drop DIV2 being much greater than voltage drop DIV1 and voltage drop DIVN being much less than voltage drop DIV1. In essence, the voltage of the pulsating direct current is not evenly distributed to the individual power consuming units 100, and there is a great randomness and unpredictability in such voltage distribution for the power consuming units. The power unit 100 with larger voltage drop at two ends is often in an overvoltage state, so that abnormal situations of high power consumption and high heat quantity occur. The power unit 100 with a small voltage drop at two ends may be in an under-voltage state, and thus may not operate normally. In general, the service life of the power unit 100 under overvoltage is over in advance, which results in the whole row of power units 100 entering an unusable place. The reason for this is that the voltage added by the pulsating direct current is always concentrated at one or a few power consuming units.

Referring to fig. 5, the power consumption unit 100 includes a power input terminal VCC and a potential reference terminal GND, and includes a voltage regulation module 103 disposed between the power input terminal VCC and the potential reference terminal GND. The power consumption unit 100 includes a LOAD and a constant current unit CS1 provided between a power supply input terminal VCC and a potential reference terminal GND. Note that the current flows in from the power supply input terminal VCC and flows out from the potential reference terminal GND. The power consumption unit 100 is, for example, a driving circuit that can perform constant current driving on a load such as a conventional diode or light emitting diode or resistor, and is, for example, a battery charge management circuit that manages a load such as a rechargeable battery. In addition to including the above-mentioned individual components, the power unit 100 in the industry may optionally, but not necessarily, allow the power unit 100 to integrate protection circuits and bandgap circuits, such as over-temperature protection or start-up protection or electrostatic protection or instantaneous voltage protection or spike current bleeder circuits, as well as an oscillator and power-on reset circuit and clock circuit or communication module, etc. The foregoing modules or circuits are all necessary or optional parts of the power consumption unit in the constant current driving aspect of the load, especially when the power consumption unit is a driving chip with high integration level, and are not described in detail because they are well known to those skilled in the art. The constant current generated by the constant current unit CS1 generally adopts a pulse width modulation method in terms of driving a load, for example, a pulse width modulation module not shown in the drawing is used to generate a pulse width modulation signal and is used to control on-off of the constant current unit. The constant current with full amplitude is loaded on the load in a repeated pulse sequence of on or off, wherein the constant current is output and loaded on the load when the pulse width modulation signal has high level logic, and the constant current is directly cut off from the load when the pulse width modulation signal has low level logic. Pulse width modulation falls within the category of the prior art.

Referring to fig. 5, the most remarkable feature of the pulsed direct current VDC derived from alternating current is that the voltage must be cycled from a lowest value, i.e. a valley, to a highest value, i.e. a peak, and then the voltage must be ramped down again from the highest value, i.e. the peak, to the lowest value, i.e. the valley, in each cycle. The core of the voltage regulation module 103 is that in the stage that the voltage of the pulsating direct current increases from low to high, the voltage drop of each of the plurality of power utilization units 100 connected in series needs to be regulated, if the voltage regulation module 103 of each power utilization unit 100 controls the voltage drop of the power utilization unit to be raised in the stage, the sum div1+div2+ of the voltage drops of all the plurality of power utilization units 100 connected in series also increases, and the regulation trend of the voltage drop accords with the growth rule of the pulsating direct current VDC in the stage. More importantly, since each of the power utilization units 100 raises its own voltage drop in the series configuration, the voltage added by the pulsed direct current VDC is unlikely to be concentrated at one or a few of the power utilization units 100, but the voltage added by the pulsed direct current VDC is evenly distributed to the power utilization units 100. In the stage of dynamic pulsation change of the pulse direct current VDC, the embodiment better solves the problem that the voltage difference between the voltage drops DIV1, DIV2 and the voltage of the voltage drops DIVN becomes large. The tendency of the voltage of the pulsed dc power to increase does not cause only one or a few of the power consuming units to become a heat source to concentrate, and the heat imparted to the system by the pulsed dc power is distributed to the individual power consuming units in a series configuration. The reason is that each power unit 100 controls its own voltage drop to raise it is equivalent to actively drawing a part of the heat to itself.

Referring to fig. 5, although the voltage adjusting module 103 has a voltage adjusting function, if the voltage adjusting module 103 continuously affects the voltage drop of the power unit 100, the unavoidable disadvantage is brought about. Assuming that the voltage drop of the power utilization unit 100 is pulled by the voltage regulation module 103 during the voltage drop phase of the pulsating direct current and cannot be recovered, the sum div1+div2+ & DIVN of the voltage drops of all the plurality of power utilization units 100 connected in series is also clamped. This irreducibility of the voltage drop does not follow the decreasing law of the pulsed direct current VDC at this stage. For example, the forced voltage regulation function of the voltage regulation module 103 near the valley of the pulsating dc power may interfere with the normal operation of the power unit 100, when the pulsating dc power is reduced to a very low voltage level and the voltage regulation module 103 is about to maintain the original high voltage level, which undoubtedly may lead to systematic disturbances between power supply and power consumption. Furthermore, if the standing is viewed from the power consumption point of view, the voltage regulation module 103 that is continuously raised in voltage consumes a great deal of energy and generates a very high temperature.

Referring to fig. 5, in the stage of decreasing the voltage of the pulsating direct current VDC from high to low, if the voltage regulation module 103 of the power unit 100 exits the control of its own voltage drop, for example, the first power unit 100 exits the control of its own voltage drop DIV1, the second power unit 100 exits the control of its own voltage drop DIV2, and so on until the nth power unit 100 exits the control of its own voltage drop DIVN. The sum div1+div2+ & gt of the voltage drops of all the plurality of power consuming units 100 connected in series is not clamped anymore, and the voltage drops have the adjustability according to the decreasing rule of the pulse direct current VDC at this stage. It is understood that once the pulsating dc power drops to a very low voltage level, the voltage regulation module 103 is not accurate to disturb the voltage drop, so that the contradiction between supply and demand between power supply and power consumption is successfully solved and the power consumption problem of the voltage regulation module 103 is improved.

Referring to fig. 6, in an alternative example, the voltage regulation module 103 comprises a voltage divider 105 connected between the power supply input VCC and said potential reference GND. The voltage divider 105, as with divider resistors R1 and R2, samples the voltage drop between the power supply input VCC and the potential reference GND in the figure, and samples the divided value of the voltage drop at the interconnection node of both resistors R1 and R2. The voltage regulation module 103 comprises a first resistor RL1 and a switch MQ and a zener diode SR connected between the power supply input VCC and said potential reference GND. The switch is typically a bipolar transistor, a mosfet, or the like. The positions of the switch and the first resistor and the zener diode can be interchanged, such as the interchange position of the switch and the first resistor, or the interchange position of the first resistor and the zener diode, or the interchange position of the switch and the zener diode, so long as the serial connection relation between the switch and the zener diode is maintained.

Referring to fig. 6, the control terminal of the switch MQ is the base of a bipolar transistor, or the control terminal of the switch MQ is the gate of a semiconductor field effect transistor. The first terminal of the switch MQ is coupled to the power supply input via a first resistor RL1 and the corresponding second terminal of the switch is coupled to the cathode or anode of the zener diode SR. The anode or the cathode of the zener diode SR is coupled to the potential reference terminal. The first and second ends of the switch MQ are for example the emitter and collector of the bipolar transistor or the collector and emitter of the bipolar transistor, respectively. The first and second ends of the switch MQ are also for example the drain and source of a field effect transistor or the source and drain of a field effect transistor, respectively.

Referring to fig. 6, in an alternative example, the voltage regulation module 103 includes a comparator a. The comparator a is used for comparing the divided value obtained by the voltage divider 105 with the threshold voltage VTH, and the divided value and the threshold voltage VTH are input to the non-inverting input terminal and the inverting input terminal of the voltage comparator a, respectively. The comparison result is high when the divided voltage value exceeds the threshold voltage VTH and the output terminal of the comparator a is coupled to the control terminal of the switch MQ, so that the switch MQ is turned on, so that the aforementioned zener diode SR is turned on at this time and generates a current flowing through the first resistor RL1 and the switch MQ. Since the voltage must rise from the lowest value, i.e. the valley value, to the highest value, i.e. the peak value, during each cycle of the pulsating direct current, the voltage divider 105 of each power consuming unit will detect an increase in the divided voltage value as the pulsating direct current increases, the switch MQ will be turned on at this stage, resulting in an increase in the voltage across the first resistor RL1, which voltage regulation corresponds to a rise in the voltage drop between the power supply input VCC and the potential reference GND. If the comparison result is low and the output terminal of the comparator a is coupled to the control terminal of the switch MQ, the switch MQ is turned off, so that the zener diode SR is turned off at this time and no current flows through the first resistor RL1 and the switch MQ. Since the voltage must drop from the highest value, i.e. the peak value, to the lowest value, i.e. the valley value, during each cycle of the pulsating direct current, the voltage divider value detected by the voltage divider 105 of each power consuming unit is also reduced as the pulsating direct current is reduced, the switch MQ is turned off at this stage, and the voltage regulating module 103 loses its voltage regulating function. The voltage regulation module 103 exits the elevation control of the self voltage drop corresponding to the phase of decreasing the voltage of the pulsating direct current from high to low.

Referring to fig. 6, in an alternative example, the voltage regulation module 103 includes a comparator a. The comparator a still compares the divided value obtained by the voltage divider 105 with the threshold voltage VTH. The divided value and the threshold voltage VTH may be input to the inverting input terminal and the non-inverting input terminal of the voltage comparator a, respectively. The switch MQ is modified in this example to be turned on under control of a low level and turned off under control of a high level. The comparison is low when the divided voltage value exceeds the threshold voltage VTH and the output of the comparator a is coupled to the control terminal of the switch MQ, so the switch MQ is turned on, which tends to cause the divided voltage value of the voltage divider 105 of each power using unit to increase as the pulsating direct current increases. The response of the voltage regulation module is analyzed again when the diametrically opposite result is produced. The comparison is high when the divided voltage value is below the threshold voltage VTH and the output of comparator a is coupled to the control terminal of switch MQ, so the switch MQ turns off, which tends to cause the divided voltage value of the voltage divider 105 of each power consuming unit to decrease as the pulsating direct current decreases. Whether the switch is turned on high or low depends on the selection type, e.g., N-type transistors or P-type transistors.

Referring to fig. 6, in an alternative example, in the increasing phase of each cycle of the pulsating direct current, since the voltage division value detected by the voltage divider 105 of each power utilization unit increases as the pulsating direct current increases, the switch MQ is turned on at this phase to cause the voltage regulating module 103 to start controlling its voltage drop. This voltage regulation corresponds to activating the enable voltage regulation module 103 during the voltage increase phase of the pulsating direct current. It is considered that the voltage regulation module of the power utilization unit in the series structure is started to further control the voltage drop of the power utilization unit to be raised when the voltage of the pulsating direct current increases from low to high, for example, when the voltage of the pulsating direct current exceeds a preset voltage value. The voltage of the pulsating direct current exceeds the preset voltage value enough to trigger the switch MQ of each power consuming unit to be turned on. Note that the time node at which the voltage regulation module of the power consumer unit controls its own voltage drop to rise, i.e. the point in time at which the switch MQ is turned on, may occur at any point in time during this phase of the voltage of the pulsating direct current VDC increasing from low to high.

Referring to fig. 6, in an alternative example, in the decreasing phase of each cycle of the pulsating direct current, since the voltage division value detected by the voltage divider 105 of each power utilization unit is also decreased along with the decreasing of the pulsating direct current, the switch MQ is turned off at this phase to enable the voltage regulating module 103 to start to exit the control of the voltage drop. This voltage regulation may pull the voltage drop between the power supply input VCC and the potential reference GND low, because in some situations the switch MQ turns off to switch off the first resistor RL1 and the voltage drop of the first resistor RL1 drops sharply. And in the stage of reducing the voltage of the pulsating direct current from high to low, for example, when the voltage of the pulsating direct current is lower than the preset voltage value, the voltage regulating module of the power utilization unit in the series structure is withdrawn from the lifting control of the voltage drop of the power utilization unit. The voltage of the pulsating direct current is below the preset voltage value sufficient to trigger the switch MQ of each powered unit to be turned off. The exit time node of the voltage regulation module of the power consuming unit exiting the elevation control of its own voltage drop may occur at any point in time during this phase of the voltage decrease of the pulsating direct current VDC from high to low, i.e. the point in time when the switch MQ is turned off.

Referring to fig. 7, in an alternative example, the voltage regulation module 103 includes a second resistor RL2 and a zener diode ZR and a junction field effect transistor JFET connected between the power supply input terminal VCC and the potential reference terminal. The control terminal of the junction field effect transistor JFET is coupled to the potential reference terminal GND and the second terminal of the junction field effect transistor JFET is also coupled to the potential reference terminal GND via a clamping resistor R3. The first and second ends of the junction field effect transistor JFET are, for example, the drain and source, respectively, or the source and drain, respectively. The control terminal of the JFET is the depletion-mode JFET gate control terminal. The zener diode ZR is connected in series with the second resistor RL2 between the first terminal of the junction field effect transistor JFET and the power supply input terminal VCC. The cathode or anode of the zener diode ZR is coupled to the power input terminal through a second resistor RL2, and the anode or anode of the zener diode ZR is coupled to the first terminal of the junction field effect transistor JFET. Essentially the positions of the zener diode ZR and the second resistor RL2 can be interchanged, for example the cathode or the cathode of the zener diode ZR is coupled to the power input terminal, and the anode or the anode of the zener diode ZR is coupled to the first terminal of the junction field effect transistor JFET through the second resistor RL2.

Referring to fig. 7, in an alternative example, the voltage regulation module 103 of the power consumption unit 100 is turned on only when the voltage drop of the power consumption unit 100 is not lower than the threshold voltage and is enough to cause the zener diode ZR to be reversely broken down. On the contrary, when the voltage of the power unit 100 is lower than the threshold voltage, the zener diode ZR is turned off and not turned on, which clearly means that the voltage regulation module 103 of the power unit 100 is turned off. The threshold voltage, also called breakdown voltage, is a precondition for determining whether the zener diode ZR is turned on. The voltage drop exceeding the threshold voltage of the zener diode ZR means that the zener diode ZR is turned on and that the junction field effect transistor JFET and the second resistor RL2 have current. Since the voltage must rise from a minimum value, i.e. the valley value, to a maximum value, i.e. the peak value, within each cycle of the pulsating direct current. Since the voltage drop experienced by each power consumption unit 100 follows an increase with an increase in the voltage of the pulsating direct current, the zener diode ZR is turned on at this stage to cause an increase in the voltage across the second resistor RL 2. This voltage regulation behavior corresponds to a step up of the voltage drop between the power supply input VCC and the potential reference GND.

Referring to fig. 7, in an alternative example, if the voltage drop does not exceed the threshold voltage of the zener diode ZR, it means that the zener diode ZR is turned off, and the junction field effect transistor JFET and the second resistor RL2 have no current. Since the voltage must drop from the highest value, i.e. the peak value, to the lowest value, i.e. the valley value, within each cycle of the pulsating direct current, the zener diode ZR is turned off at this stage and the voltage regulation module 103 loses its voltage regulation function, since the voltage drop experienced by each power utilization unit 100 follows the drop as the voltage of the pulsating direct current drops. The voltage regulation module 103 exits the boost control of the voltage drop corresponding to the phase of decreasing the pulsating direct current from high to low.

Referring to fig. 7, if the voltage drop of the power consumption unit 100 is sufficient to make the zener diode ZR breakdown on, since the second terminal of the JFET is coupled to the potential reference terminal GND through the clamp resistor R3, current flows from the second terminal of the JFET to the clamp resistor R3. The forward voltage across the clamp resistor R3 is considered to be the source gate voltage or drain gate voltage of the junction field effect transistor JFET. Note that the forward voltage across the clamp resistor R3 is opposite in sign to the gate-source or gate-drain voltage of the junction field effect transistor. When the current flowing through the clamping resistor R3 changes to a voltage across the clamping resistor that is exactly equal to the pinch-off voltage of the JFET, the JFET will nearly enter the pinch-off state and provide a small amount of leakage current to maintain the voltage across the clamping resistor R3 equal to the pinch-off voltage.

Referring to fig. 7, in an alternative example, in an increasing phase of each cycle of the pulsating direct current, since the voltage value borne by the zener diode ZR of each power unit increases as the pulsating direct current increases, the zener diode ZR turns on at this phase to cause the voltage regulating module 103 to start controlling its own voltage drop. This voltage regulation corresponds to enabling the voltage regulation module 103 during the voltage increase phase of the pulsating direct current. It can be considered that the voltage regulation module of the power utilization unit in the series structure is activated to further control the voltage drop of the power utilization unit to be raised in a stage that the voltage of the pulsating direct current increases from low to high, for example, when the voltage of the pulsating direct current exceeds a preset voltage value. The voltage of the pulsating direct current exceeding the preset voltage value is sufficient to trigger the zener diode ZR of each power consuming unit to turn on. The time node at which the voltage regulation module of the power utilization unit controls the self voltage drop to be raised may occur at any time during the stage when the voltage of the pulsating direct current VDC increases from low to high, i.e. the time point at which the zener diode ZR is turned on.

Referring to fig. 7, in an alternative example, in a decreasing stage of each cycle of the pulsating direct current, since the voltage value born by the zener diode ZR of each power consumption unit is also decreased as the pulsating direct current decreases, the zener diode ZR is turned off at this stage to start the voltage regulation module 103 to exit the control of the voltage drop. This voltage regulation may pull down the voltage drop between the power supply input VCC and the potential reference GND, because in some cases the zener diode ZR turns off to switch off the second resistor RL2 and the voltage drop across the second resistor RL2 drops sharply. And in the stage of reducing the voltage of the pulsating direct current from high to low, for example, when the voltage of the pulsating direct current is lower than the preset voltage value, the voltage regulating module of the power utilization unit in the series structure is withdrawn from the lifting control of the voltage drop of the power utilization unit. The voltage of the pulsating direct current is below the preset voltage value sufficient to trigger the zener diode ZR of each power consuming unit to be turned off. The exit time node at which the voltage regulation module of the power consuming unit exits the elevation control of its own voltage drop may occur at any point in time during this phase of the reduction of the voltage of the pulsating direct current VDC from high to low, i.e. the point in time at which the zener diode ZR is turned off.

Referring to fig. 8, pulsed direct current VDC derived from alternating current is known to have pulsating characteristics. In the stage that the voltage of the pulsating direct current increases from low to high, the voltage drop of each of the plurality of power utilization units 100 connected in series is actively regulated, and the voltage regulation module 103 of each power utilization unit 100 is designed to control the voltage drop of the power utilization unit 100 to be regulated upwards in the stage. Each of the power utilization units 100 in the series structure raises its own voltage drop, so that the voltage portion increased by the pulse direct current VDC is no longer concentrated at one or a few of the power utilization units 100, but the voltage of the pulse direct current VDC is uniformly distributed to the power utilization units 100. The hatched portion indicates that although the voltage value of the pulsating direct current VDC is increasing, the difference between the voltage drops DIV1, DIV2, and the..the. DIVN of the respective power consuming units has been small. The voltage drop of each of the plurality of power utilization units 100 connected in series is still regulated in a stage of reducing the voltage of the pulsating direct current from high to low, and the voltage regulation module 103 of each power utilization unit 100 is designed to exit the up-regulation control of the voltage drop of the power utilization unit 100 in this stage. The shaded part of the pulse direct current in the figure shows that the voltage regulating module is controlling the voltage drop of the voltage regulating module to be regulated and lifted, and the non-shaded part of the pulse direct current in the figure shows that the voltage regulating module is quitting the regulation control of the voltage drop of the voltage regulating module. The ripple voltage enables each power utilization unit to control the voltage drop of the power utilization unit to be up-regulated and lifted at the shadow part higher than the preset voltage value, the ripple voltage uses the power utilization unit to exit the up-regulation of the voltage drop of the power utilization unit at the non-shadow part lower than the preset voltage value, and a transverse line VH for dividing the shadow part and the non-shadow part, which is overlapped on the ripple voltage waveform, represents the magnitude of the preset voltage value.

Referring to fig. 9, a waveform diagram of the pulsed direct current VDC over one period is depicted. The waveform diagram of the current IS shows the cascade current flowing through the plurality of power consuming units 100 connected in series. The total input current and the total output current of each power usage unit 100 are equal to the current IS. The voltage regulation module 103 of each power consumer unit controls its own voltage drop to rise in a phase in which the voltage of the pulsating direct current VDC increases from low to high, and the current IS rises accordingly, because the voltage regulation module 103 IS activated and generates a current flowing through the voltage regulation module 103. The rising action of the series current may occur at any time during the phase of increasing the voltage of the pulsating direct current from low to high. By contrast, the voltage regulation module 103 of each power consumer unit exits the boost control of its own voltage drop by the pulsating characteristic of the pulsating voltage itself, in that the voltage regulation module 103 IS disabled by sleep and the current flowing through the voltage regulation module 103 IS reduced. The reduction of the series current may occur at any time during the phase of the voltage of the pulsating direct current decreasing from high to low. In a system adapting to pulsating direct current, from the angles of power supply and power consumption, the input current waveform of the system basically follows the input voltage waveform of the system, namely, the input current voltage is almost the same frequency and the same phase, so that the active power sucked from a power supply can be maximized, and the system has higher power factor and better total harmonic distortion index. In some examples, the power factor may be lacking if the voltage regulation module is not introduced and the cascode current is kept constant. More importantly, the voltage converter link between alternating current and direct current is abandoned, so that the problems of electromagnetic interference and electromagnetic compatibility are perfectly solved.

Referring to fig. 10, in an alternative example, the voltage regulation module 103 comprises a voltage divider 105 connected between the power supply input VCC and said potential reference GND. The voltage divider 105, for example with voltage dividing resistors R1 and R2, samples the voltage drop between the power supply input VCC and the potential reference GND in the figure, obtaining a divided value of the voltage drop at the interconnection node between the resistors R1 and R2. The voltage regulation module 103 comprises a third resistor RL3 and a current source CS2 in series between the supply input VCC and said potential reference GND, which can be essentially interchanged in position and provided that the series relationship between them is preserved.

Referring to fig. 10, in an alternative example, the voltage regulation module 103 includes a comparator a. The comparator a is used for comparing the divided value obtained by the voltage divider 105 with the threshold voltage VTH. The divided value and the threshold voltage VTH are input to the non-inverting input terminal and the inverting input terminal of the voltage comparator a, respectively. If the divided voltage exceeds the threshold voltage VTH, the comparison result is high and the output result of the comparator a is used to control the current source CS2, the current source CS2 is turned on, so that a current flowing through the third resistor RL3 and the current source CS2 is generated. The voltage must rise from the lowest value, i.e. the valley value, to the highest value, i.e. the peak value, during each period of the pulsating direct current, and the voltage divider 105 of the power consumption unit also increases with the increase of the voltage, so that the current source CS2 is turned on at this stage to directly cause the voltage across the third resistor RL3 to increase synchronously, and the voltage drop between the power input VCC and the potential reference GND is raised. If the comparison result is low, the current source CS2 is turned off, so that the current source CS2 is turned off and no current flows through the third resistor RL3 and the current source CS 2. The voltage must drop from the highest value, i.e. the peak value, to the lowest value, i.e. the valley value, during each period of the pulsating direct current, and the voltage division value detected by the voltage divider 105 decreases as the pulsating voltage decreases, so that the current source CS2 is shut off at this stage to directly induce the voltage across the third resistor RL3 to decrease synchronously, which results in the voltage regulation module 103 losing the voltage regulation function. The voltage regulation module 103 exits the elevation control of the self voltage drop corresponding to the phase of decreasing the voltage of the pulsating direct current from high to low.

Referring to fig. 10, in an alternative example, the voltage regulation module 103 includes a comparator a. The comparator a still compares the divided value obtained by the voltage divider 105 with the threshold voltage VTH. The divided value and the threshold voltage VTH may be input to the inverting input terminal and the non-inverting input terminal of the voltage comparator a, respectively. The current source CS2 is instead turned on under control of a low level and turned off under control of a high level in the present example. If the divided value exceeds the threshold voltage VTH and the comparison result of the comparator a is low and the output result of the comparator a is used to control the current source CS2, the current source CS2 is turned on, which tends to increase the divided value of the voltage divider 105 of each power using unit as the pulsating direct current increases. The response of the voltage regulation module is analyzed again when the diametrically opposite result is produced. When the divided value is lower than the threshold voltage VTH, the comparison result is high and the output result of the comparator a still controls the current source CS2, and the current source CS2 is turned off, which tends to cause the divided value of the voltage divider 105 of each power utilization unit to decrease as the pulsating direct current decreases. The current source CS2 allows to connect in series with a switch not shown in the figure and the comparator a controls the on or off of this switch, which is still an example of the comparator determining whether the current source is on or not, the current source CS2 and the switch connected in series therewith being considered as a whole. Or the current source CS2 itself is also allowed to have a switch not shown in the figure and the comparator a controls the switch to be turned on or off, if the switch is turned on means that the current source outputs a constant current and if the switch is turned off means that the current source has no current output, which is still an example of the comparator determining whether the current source is turned on, the current source CS2 being considered as a whole together with the switch it has. Taking a voltage-to-current converter (V/I converter) with an operational amplifier and a power tube as an example, the output end of the operational amplifier is coupled to the control end of the power tube and the operational amplifier controls the constant current output by the power tube, and the power tube is commonly a bipolar transistor and a field effect transistor. For example, a switch provided with a voltage-to-current converter may be arranged between the output of the operational amplifier and the control terminal of the power tube, or a switch provided with a voltage-to-current converter may be arranged at the current inflow terminal of the power tube or at the current outflow terminal of the power tube, the comparator a controlling the switch to be turned on or off, which switch, if turned on, means that the current source outputs a constant current and which switch is turned off means that the current source does not output a current. How to switch the current source CS2 off or on with a signal of a comparison result or the like can be realized by means of prior art.

Referring to fig. 10, in an alternative example, in an increasing phase of each period of the pulsating direct current, since the voltage division value detected by the voltage divider 105 of each power consumption unit increases as the pulsating direct current increases, the current source CS2 is turned on at this phase so that the voltage regulation module 103 starts to control its voltage drop. This voltage regulation corresponds to enabling the voltage regulation module 103 during the voltage increase phase of the pulsating direct current. It can be considered that the voltage regulation module of the power utilization unit in the series structure is activated to further control the voltage drop of the power utilization unit to be raised in a stage that the voltage of the pulsating direct current increases from low to high, for example, when the voltage of the pulsating direct current exceeds a preset voltage value. The voltage of the pulsating direct current exceeding the preset voltage value is sufficient to trigger the current source CS2 of each power consuming unit to be switched on. Note that the time node at which the voltage regulation module of the power consuming unit controls its own voltage drop to be raised may occur at any time during this stage of the voltage increase of the pulsating direct current VDC from low to high, i.e. the point in time at which the current source CS2 is turned on.

Referring to fig. 10, in an alternative example, in a decreasing stage of each cycle of the pulsating direct current, since the voltage division value detected by the voltage divider 105 of each power consumption unit is also decreased as the pulsating direct current decreases, the current source CS2 is turned off at this stage to enable the voltage adjustment module 103 to start to exit the control of the voltage drop. This voltage regulation may pull down the voltage drop between the power input VCC and the potential reference GND, because the current source CS2 is turned off in some situations, so that the third resistor RL3 is turned off and the voltage drop of the third resistor RL3 drops abruptly. And in the stage of reducing the voltage of the pulsating direct current from high to low, for example, when the voltage of the pulsating direct current is lower than the preset voltage value, the voltage regulating module of the power utilization unit in the series structure is withdrawn from the lifting control of the voltage drop of the power utilization unit. The voltage of the pulsating direct current is below the preset voltage value sufficient to trigger the current source CS2 of each power consuming unit to be switched off. The exit time node at which the voltage regulation module of the power consuming unit exits the elevation control of its own voltage drop may occur at any point in time during this phase of the reduction of the voltage of the pulsating direct current VDC from high to low, i.e. the point in time at which the current source CS2 is turned off.

Referring to fig. 11, in an alternative example, the voltage regulation module 103 includes a fourth resistor RL4 and a series zener diode ZR connected between the power supply input VCC and the potential reference, and a current source CS3. The positions of the three can be substantially interchanged and only the serial relationship between the three can be maintained. The number of the series connection of the zener diodes ZR can be designed according to practical requirements. Generally, the greater the number of zener diodes ZR connected in series means the higher the threshold voltage corresponding to the reverse breakdown requirement, and the smaller the number of zener diodes ZR connected in series means the lower the threshold voltage corresponding to the reverse breakdown requirement. For example, the cathode or anode of the zener diode ZR is coupled to the power input terminal through the fourth resistor RL4 and the current source CS3 is disposed between the anode or cathode of the zener diode ZR and the potential reference terminal, note that this is only an alternative example of the three being connected in series. A greater number of zener diodes ZR may also be used in fig. 7.

Referring to fig. 11, in an alternative example, the voltage regulation module 103 of the power consumption unit 100 is turned on only when the voltage drop of the power consumption unit 100 is not lower than the threshold voltage and is enough to cause the zener diode ZR to be reversely broken down. On the contrary, when the voltage of the power unit 100 is lower than the threshold voltage, the zener diode ZR is turned off and not turned on, which clearly means that the voltage regulation module 103 of the power unit 100 is turned off. A reasonable threshold voltage designed in advance is a precondition for determining whether the zener diode ZR is turned on. The voltage drop exceeding the threshold voltage of the zener diode ZR means that the zener diode ZR is turned on, and the zener diode ZR, the current source CS3, and the fourth resistor RL4 have current. Since the voltage must rise from a minimum value, i.e. the valley value, to a maximum value, i.e. the peak value, within each cycle of the pulsating direct current. Since the voltage drop experienced by each power consumption unit 100 follows an increase with an increase in the voltage of the pulsating direct current, the zener diode ZR is turned on at this stage to cause an increase in the voltage across the fourth resistor RL 4. The voltage regulation module and the current source are turned on because the voltage of the pulsating direct current rises to a voltage drop higher than the threshold voltage. This voltage regulation behavior corresponds to a step up of the voltage drop between the power supply input VCC and the potential reference GND.

Referring to fig. 11, in an alternative example, if the voltage drop does not exceed the threshold voltage of the zener diode ZR, it means that the zener diode ZR is turned off, and the zener diode ZR, the current source CS3, and the fourth resistor RL4 have no current. Since the voltage must drop from the highest value, i.e. the peak value, to the lowest value, i.e. the valley value, within each cycle of the pulsating direct current, the zener diode ZR is turned off at this stage and the voltage regulation module 103 loses its voltage regulation function, since the voltage drop experienced by each power utilization unit 100 follows the drop as the voltage of the pulsating direct current drops. The voltage regulation module and the current source are turned off because the voltage of the pulsating direct current drops to a voltage drop below the threshold voltage. The voltage regulation module 103 exits the boost control of the voltage drop corresponding to the phase of decreasing the pulsating direct current from high to low.

Referring to fig. 11, in an alternative example, in an increasing phase of each cycle of the pulsating direct current, since the voltage value born by the zener diode ZR of each power consumption unit increases as the pulsating direct current increases, the zener diode ZR is turned on at this phase and the voltage regulation module 103 starts to control its voltage drop. This voltage regulation corresponds to enabling the voltage regulation module 103 during the voltage increase phase of the pulsating direct current. It can be considered that the voltage regulation module of the power utilization unit in the series structure is activated to further control the voltage drop of the power utilization unit to be raised in a stage that the voltage of the pulsating direct current increases from low to high, for example, when the voltage of the pulsating direct current exceeds a preset voltage value. The voltage of the pulsating direct current exceeding the preset voltage value is sufficient to trigger the zener diode ZR of each power consuming unit to turn on. The time node at which the voltage regulation module of the power utilization unit controls the self voltage drop to be raised may occur at any time during the stage when the voltage of the pulsating direct current VDC increases from low to high, i.e. the time point at which the zener diode ZR is turned on.

Referring to fig. 11, in an alternative example, in a decreasing stage of each cycle of the pulsating direct current, since the voltage value born by the zener diode ZR of each power consumption unit is also decreased as the pulsating direct current decreases, the zener diode ZR is turned off at this stage to start the voltage regulation module 103 to exit the control of the voltage drop. This voltage regulation may pull the voltage drop between the power supply input VCC and the potential reference GND low, because the zener diode ZR turns off to cut off the fourth resistor RL4 and the voltage drop of the fourth resistor RL4 drops abruptly in some cases. And in the stage of reducing the voltage of the pulsating direct current from high to low, for example, when the voltage of the pulsating direct current is lower than the preset voltage value, the voltage regulating module of the power utilization unit in the series structure is withdrawn from the lifting control of the voltage drop of the power utilization unit. The voltage of the pulsating direct current is below the preset voltage value sufficient to trigger the zener diode ZR of each power consuming unit to be turned off. The exit time node at which the voltage regulation module of the power consuming unit exits the elevation control of its own voltage drop may occur at any point in time during this phase of the reduction of the voltage of the pulsating direct current VDC from high to low, i.e. the point in time at which the zener diode ZR is turned off.

Referring to fig. 11, the constant Current unit and the Current Source are also referred to as a constant Current Source module (Current Source) and consider the generated stable reference Current or constant Current as a driving Current. The load and the constant current source module are connected in series, so that the current of the load can be stabilized, and the purpose of constant current control is realized. Or the Current Mirror structure is used for matching the constant Current source module so that the Current flowing through the Current Mirror is equal to or proportional to the reference Current, the Current Mirror (Current Mirror) is a specific form of the constant Current source module, and the Mirror Current of the Current Mirror is equal to or proportional to the input reference Current, and the Mirror Current flowing through the Current Mirror is replicated or copied according to a certain proportion to the input reference Current. The constant current drive can also be applied to the load by flowing an image current through the load. In the present application, the circuit capable of generating a stable reference current or a constant current can be assigned to the definition of the constant current unit CS1 or the current sources CS2-CS3, and the constant current source modules similar to the voltage-current converter are all selectable examples of the constant current unit or the current source. It can be seen that the circuit topology of the constant current cell or current source that generates a constant output current shown in the figure is not unique in nature but diverse.

Referring to fig. 12, the power consumption unit 100 described above may supply a constant current to the LOAD to perform constant current driving on the LOAD, taking a driving circuit as an example. The drive circuit is in turn typically in the form of an integrated circuit or chip. The LOAD and the constant current unit CS1 are connected between the power supply input terminal VCC and the potential reference terminal GND. In essence, if a load is not required, the constant current cell CS1 can also be connected between the power supply input VCC and the potential reference GND. In this example, both simultaneous load and constant current units are allowed to be connected in series between the power supply input terminal and the potential reference terminal, and separate constant current units are allowed to be directly connected between the power supply input terminal and the potential reference terminal.

Referring to fig. 12, the leds are connected in series to form a led string. The first set of LED STRINGs LED-STRING1 and the second set of LED STRINGs LED-STRING2 and the third set of LED STRINGs LED-STRING3 are shown in the figure. Note that the number of the light emitting diode group strings is not limited, nor is the number of light emitting diodes connected in series inside each group of light emitting diode group strings. The three sets of LED strings shown in the figures are exemplary only and not intended to be limiting in any way. The light emitting diode is, for example, a solid state light source such as a white light diode.

Referring to fig. 12, a plurality of power utilization units 100 are connected in series with three sets of led strings as two driving circuits. The anode of the light emitting diode STRING LED-STRING1 is coupled to the positive pole VP of the power supply and the cathode of the light emitting diode STRING LED-STRING1 is coupled to the power supply input VCC of the first power consumer unit 100. The anode of the light emitting diode STRING LED-STRING2 is coupled to the potential reference GND of the first power unit 100 and the cathode of the light emitting diode STRING LED-STRING2 is coupled to the power input VCC of the second power unit 100. The anode of the light emitting diode STRING LED-STRING3 is coupled to the potential reference GND of the second power usage unit 100 and the cathode of the light emitting diode STRING LED-STRING3 is coupled to the cathode VN of the power supply. This is an alternative embodiment where multiple driving circuits are connected in series with one or more of the groups of light emitting diode strings.

Referring to fig. 12, the LED STRING LED-STRING1 may be interchanged with the first power unit 100, and the LED STRING LED-STRING3 may be interchanged with the second power unit 100. For example, it may be modified that the power input VCC of the first power unit 100 is connected to the positive electrode VP, the potential reference GND of the second power unit 100 is connected to the negative electrode VN, and the LED STRINGs LED-STRING1 to LED-STRING3 are connected in series between the potential reference GND of the first power unit 100 and the power input VCC of the second power unit 100. This is still an example of multiple driving circuits in series with multiple sets of LED strings.

Referring to fig. 12, the light emitting diode STRING LED-STRING1 may be interchanged with the first power unit 100 or the light emitting diode STRING LED-STRING3 may be interchanged with the second power unit 100. For example, the power input VCC of the first power utilization unit 100 is connected to the positive electrode VP. The anode of the light emitting diode STRING LED-STRING1 is coupled to the potential reference GND of the first power usage unit 100 and the cathode of the light emitting diode STRING LED-STRING1 is coupled to the anode of the light emitting diode STRING LED-STRING2, the cathode of the light emitting diode STRING LED-STRING2 is coupled to the power supply input VCC of the second power usage unit 100. The anode of the light emitting diode STRING LED-STRING3 is coupled to the potential reference GND of the second power usage unit 100 and the cathode of the light emitting diode STRING LED-STRING3 is coupled to the cathode VN of the power supply. This is still an example of multiple driving circuits in series with multiple sets of LED strings.

Referring to fig. 12, the light emitting diode STRING LED-STRING1 may be interchanged with the first power unit 100 or the light emitting diode STRING LED-STRING3 may be interchanged with the second power unit 100. For example, the anode of the LED STRING, i.e., LED-STRING1, is connected to the positive electrode VP and the cathode of the LED STRING, LED-STRING1, is connected to the power input VCC of the first power-using unit 100. And the anode of the LED STRING LED-STRING2 is coupled to the potential reference GND of the first power unit 100 and the cathode of the LED STRING LED-STRING2 is coupled to the anode of the LED STRING LED-STRING3, and the cathode of the LED STRING LED-STRING3 is coupled to the power input VCC of the second power unit 100. The potential reference terminal of the second power consuming unit 100 is coupled to the negative pole VN of the power supply. This is still an example of multiple driving circuits in series with multiple sets of LED strings.

Referring to fig. 12, in an alternative example, the LED STRING LED-STRING1 may be discarded, modified to have the power input VCC of the first power-using unit 100 directly coupled to the positive electrode VP. This is still an example of multiple driving circuits in series with multiple sets of LED strings.

Referring to fig. 12, in an alternative example, the LED STRING LED-STRING2 may be discarded, modified to have the power input VCC of the second power-using unit 100 directly coupled to the potential reference GND of the first power-using unit 100. This is still an example of multiple driving circuits in series with multiple sets of LED strings.

Referring to fig. 12, in an alternative example, the LED STRING LED-STRING3 may be discarded, modified to have the potential reference GND of the second power-using cell 100 in the figure directly coupled to the cathode VN. This is still an example of multiple driving circuits in series with multiple sets of LED strings.

Referring to fig. 12, in an alternative example, the LED STRING LED-STRING1 may be discarded, while the LED STRING LED-STRING3 is also discarded. The power input of the first power consuming unit 100 is directly coupled to the positive pole VP and the potential reference of the second power consuming unit 100 is directly coupled to the negative pole VN. This is still an example of multiple driver circuits in series with one or more sets of LED strings.

Referring to fig. 13, in an alternative example, the number of first power usage units 100 connected between the LED STRING LED-STRING1 and LED STRING LED-STRING2 may be changed to a plurality of power usage units 100 connected in series between the LED STRING LED-STRING1 and LED-STRING 2. This is still an example of a plurality of driving circuits connected in series with a plurality of sets of light emitting diode strings.

Referring to fig. 13, in an alternative example, the number of the second power usage units 100 connected between the LED STRING LED-STRING2 and LED STRING LED-STRING3 may be changed to a plurality of power usage units 100 connected in series between the LED STRING LED-STRING2 and LED-STRING 3. This is still an example of a plurality of driving circuits connected in series with a plurality of sets of light emitting diode strings.

Referring to fig. 13, a plurality of power utilization units 100 connected in series are connected in series with one or more of the led strings. The plurality of power usage units 100 may be grouped together without being broken up by the led string, i.e., without inserting the led string between the plurality of power usage units 100, and the plurality of power usage units 100 may be dispersed among the plurality of led strings, i.e., with inserting the led string between the plurality of power usage units 100. As in the case of a plurality of power units 100 connected in series, the power input VCC of the latter power unit 100 may be directly coupled to the potential reference GND of the previously described power unit 100, which is satisfied when the LED STRING LED-STRING2 is discarded. This is satisfied when the power input VCC of the latter power-consuming unit 100 is indirectly coupled to the potential reference GND of the former power-consuming unit 100 via a light-emitting diode STRING LED-STRING2 being reserved. The LED group strings can be alternately distributed among the plurality of the power utilization units, and the power utilization units can be alternately distributed among the plurality of groups of LED group strings. The total current IS characterizes the current through all the power consuming units and characterizes the current through all the strings of light emitting diodes.

Referring to fig. 13, assuming that the power unit 100 drives such a LOAD with a light emitting diode pixel, if a large number of power units 100 are gathered together without being broken up by the light emitting diode group string, the LOAD and the constant current unit are preferably connected in series between the power input terminal VCC and the potential reference terminal GND. To avoid the formation of a large number of dark spots without light sources at the power usage unit 100, as the LOAD may use a light source LOAD. It should be noted that when the constant current device and the led string are connected in series and then the led string and the constant current device are driven by the power voltage, the physical characteristics of the led string determine an unavoidable negative disadvantage that most of the voltage increased during the minute fluctuation phase of the power voltage is borne by the constant current device, and at the same time, the increase of the voltage portion borne by the led string is relatively negligible even if the power voltage fluctuates slightly, and the constant current device is damaged. In the present application, the power utilization unit 100 is serially connected with one or more groups of light emitting diode strings, most of the voltage increased by the pulsating direct current in the pulsating step is applied to the power utilization unit 100, and the power utilization unit 100 actively increases the voltage drop of itself to share the voltage increased portion of the pulsating direct current with each power utilization unit 100. The voltage regulating scheme not only protects the power utilization units 100 from being damaged easily, but also solves the defect that the voltage increased by the pulsating direct current is always concentrated at one or a few power utilization units, and the power utilization units 100 serving as main heat sources are also scattered. The load aging process of the solid-state light source and the high-temperature gathering effect of the easily damaged power utilization unit can be easily accelerated. Under the condition of supplying pulsating voltage, each power unit can raise its own voltage drop and raise its own voltage drop, and at the same time, each power unit can withdraw from raising control of its own voltage drop and can also lower its own voltage drop, and its change is almost following the change of pulsating voltage and can maximize the active power extracted from power supply. The system meets the aims of improving the power factor and reducing the harmonic pollution to the power grid, which are proposed in the industry, and the system can be connected to the power grid to purify the power grid, and even if the traditional active power factor correction circuit or passive power factor correction circuit is not introduced, the system has better power factor value and total harmonic distortion index.

Referring to fig. 13, most of the present embodiment and the embodiments described above are power supplied from a dc voltage source, which is explained using pulsating dc VDC as a main example, to a plurality of power consuming units connected in series. The regulated voltage, in the form of a substantially non-pulsating voltage, may also be referred to as a dc voltage source to power a plurality of power consuming units in series. Typically a plurality of power consuming units in series are powered by a regulated voltage, such as provided by the voltage converter DC described above. Note that the regulated voltage is referred to as a pulsating voltage, and the voltage value of the regulated voltage is also allowed to be adjustable. For example, the voltage converter outputs stable voltages with different voltage levels to supply power to the series-connected power utilization units. However, unlike a pulsating voltage, the voltage magnitude and direction of the stabilized voltage hardly change transiently with time. The technical characteristics of the power utilization unit in the pulsating voltage power supply mode are also applicable to the stable voltage power supply mode. For example, the plurality of driving circuits can be powered by a stable voltage or a pulsating voltage on the premise that the plurality of driving circuits are connected in series, and the voltage regulating module is activated and started when the voltage of the stable voltage or the pulsating voltage is not lower than a preset voltage value, so that the voltage regulating module of each driving circuit controls the voltage drop of the driving circuit to be raised. Or when the voltage of the stable voltage or the pulsating voltage is lower than the preset voltage value, the voltage regulating module is in sleep disabling state, and the voltage regulating module of each driving circuit does not control the voltage drop of the driving circuit. The voltage sources such as pulsating voltage or stable voltage can supply power for the power utilization unit. The horizontal line VH superimposed on the waveform of the pulsating voltage represents the magnitude of the preset voltage value, and referring to fig. 8, the waveform segment of the pulsating voltage above the horizontal line is represented by a hatched portion and the waveform segment of the pulsating voltage below the horizontal line is represented by a non-hatched portion, and the pulsating voltage causes each driving circuit to control the voltage drop thereof to rise at the hatched portion above the preset voltage value, and causes the driving circuit to exit the rise control of the voltage drop thereof at the non-hatched portion below the preset voltage value.

The foregoing description and drawings set forth exemplary embodiments of the specific structure of the embodiments, and the foregoing invention provides presently preferred embodiments, without being limited to the precise details. Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. It is therefore intended that the following appended claims be interpreted as covering all alterations and modifications as fall within the true spirit and scope of the invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to be within the intent and scope of the present invention.

Claims

1. A system adapted to wide voltage input, characterized by comprising:

A plurality of power consumption units connected in series, wherein a DC voltage source supplies power to the plurality of power consumption units connected in series;

The power consumption unit comprises a power input terminal and a potential reference terminal, and among the plurality of power consumption units connected in series, the power input terminal of the latter power consumption unit is coupled to the potential reference terminal of the adjacent previous power consumption unit;

The power consumption unit has a voltage regulating module arranged between the power input terminal and the potential reference terminal;

There is a voltage drop between the power input terminal and the potential reference terminal of each of the power consumption units;

When the voltage of the DC voltage source increases from low to high, the voltage regulating module of each power-consuming unit controls its own voltage drop to increase; and

When the voltage of the DC voltage source decreases from high to low, the voltage regulating module of each power-consuming unit quits controlling the voltage drop of itself.

2. The system adapted to wide voltage input according to claim 1, characterized in that:

The DC voltage source is obtained by rectifying the AC power through a rectifier.

3. The system adapted to wide voltage input according to claim 1, characterized in that:

The power consumption unit is a driving circuit that can provide a constant current to the load, so as to implement a constant current drive on the load;

The power consumption unit has a constant current unit for generating a constant current;

In each of the power consumption units, a load and a constant current unit are connected in series between a power input terminal and a potential reference terminal.

4. The system adapted to wide voltage input according to claim 1, characterized in that:

The voltage regulation module comprises:

A voltage divider is provided between the power input terminal and the potential reference terminal, sampling the voltage drop and obtaining a voltage division value;

A resistor, a switch, and a voltage-stabilizing diode connected in series between the power input terminal and the potential reference terminal;

a comparator having an output terminal coupled to a control terminal of the switch, the comparator comparing the divided voltage value with a threshold voltage and, when the divided voltage value exceeds the threshold voltage, turning on the switch and causing the Zener diode to conduct;

When the divided voltage value is lower than the threshold voltage, the switch is turned off.

5. The system adapting to wide voltage input according to claim 1, characterized in that:

The voltage regulation module comprises:

A resistor, a Zener diode, and a junction field effect transistor are connected in series between the power input terminal and the potential reference terminal;

The Zener diode and the resistor are connected in series between the first terminal of the junction field effect transistor and the power input terminal;

The control terminal of the junction field effect transistor is coupled to the potential reference terminal and the second terminal of the junction field effect transistor is coupled to the potential reference terminal via another clamping resistor.

6. The system adapted to wide voltage input according to claim 5, characterized in that:

The voltage regulating module of any one of the power-consuming units is turned on only when the voltage drop of the power-consuming unit is not lower than a critical voltage, so that the Zener diode is reversely broken down;

When the voltage drop of any one of the power-consuming units is lower than the critical voltage, the Zener diode is cut off, and the voltage regulating module of any one of the power-consuming units is turned off.

7. The system adapting to wide voltage input according to claim 1, characterized in that:

The voltage regulation module comprises:

A resistor and a current source are connected in series between the power input terminal and the potential reference terminal;

a comparator for determining whether the current source is turned on, the comparator comparing the divided voltage value with a threshold voltage and turning on the current source when the divided voltage value exceeds the threshold voltage;

When the divided voltage value is lower than the threshold voltage, the current source is turned off.

8. The system adapting to wide voltage input according to claim 1, characterized in that:

The voltage regulation module comprises:

A resistor, a Zener diode, and a current source are connected in series between the power supply input terminal and the potential reference terminal;

The current source is turned on only when the voltage drop of any of the power-consuming units is not lower than a critical voltage, so that the Zener diode is reversely broken down and turned on; otherwise, the current source is turned off.

9. A method for adapting to wide voltage input, characterized in that:

Connecting multiple power consumption units in series;

The method includes:

Applying a DC voltage source obtained by rectifying the AC power to the plurality of power-consuming units to realize power supply;

As the voltage of the DC voltage source increases from low to high, the voltage regulating module of each of the power-consuming units is forced to adaptively raise the voltage drop, so that the voltage of the DC voltage source is evenly distributed to each of the power-consuming units; and

As the voltage of the DC voltage source decreases from high to low, the voltage regulating module of each power-consuming unit is forced to adaptively lower the voltage drop.

10. The method according to claim 9, characterized in that:

The voltage regulation module comprises:

11. The method according to claim 9, characterized in that:

The voltage regulation module comprises:

12. The method according to claim 9, characterized in that:

The voltage regulation module comprises:

13. The method according to claim 9, characterized in that:

The voltage regulation module comprises:

14. The method according to claim 9, characterized in that:

The power consumption unit has a constant current unit which can provide a constant current to a load, and the constant current unit and the load are connected in series between a power input terminal and a potential reference terminal.

15. A driving circuit adapted to wide voltage input, characterized by comprising:

Power input terminal and potential reference terminal;

A constant current unit for providing a constant current, the constant current unit being arranged between the power input terminal and the potential reference terminal;

A voltage regulating module arranged between the power input terminal and the potential reference terminal;

On the premise that the plurality of drive circuits are connected in series, a DC voltage source supplies power to the plurality of drive circuits;

There is a voltage drop between the power input terminal and the potential reference terminal of each of the driving circuits;

When the voltage of the DC voltage source increases from low to high, the voltage regulating module of each driving circuit controls its own voltage drop to increase; and

When the voltage of the DC voltage source decreases from high to low, the voltage regulating module of each driving circuit quits controlling the voltage drop of itself.

16. The driving circuit adapted to wide voltage input according to claim 15, characterized in that:

The voltage regulation module comprises:

17. The driving circuit adapted to wide voltage input according to claim 15, characterized in that:

The voltage regulation module comprises:

18. The driving circuit adapted to wide voltage input according to claim 15, characterized in that:

The voltage regulation module comprises:

19. The driving circuit adapted to wide voltage input according to claim 15, characterized in that:

The voltage regulation module comprises:

The current source is turned on only when the voltage drop of any one of the driving circuits is not lower than a critical voltage, causing the Zener diode to reversely break down and conduct, otherwise the current source is turned off.

20. The driving circuit adapted to wide voltage input according to claim 15, characterized in that:

Connecting a plurality of light emitting diodes in series to form a light emitting diode string;

The plurality of driving circuits are also connected in series with one or more groups of light emitting diode strings, and a DC voltage source supplies power to the plurality of driving circuits and to the one or more groups of light emitting diode strings;

The total current flowing in from the power input terminal of each of the driving circuits and flowing out from the potential reference terminal of each of the driving circuits also flows through each group of the light emitting diode strings.

21. The driving circuit adapted to wide voltage input according to claim 15, characterized in that:

In each of the driving circuits, a load and a constant current unit are connected in series between a power input terminal and a potential reference terminal.

22. The driving circuit adapted to wide voltage input according to claim 20, characterized in that:

In each of the driving circuits, the load and the constant current unit are connected in series between the power input terminal and the potential reference terminal; or

In each of the driving circuits, the constant current unit is directly connected between the power input terminal and the potential reference terminal.

23. The driving circuit adapted to wide voltage input according to claim 15, characterized in that:

24. A chip adapting to wide voltage input, characterized by comprising the driving circuit adapting to wide voltage input as claimed in any one of claims 15 to 23.

25. A driving circuit adapted to wide voltage input, characterized by comprising:

Power input terminal and potential reference terminal;

When the voltage of the DC voltage source is not lower than a preset voltage value, the voltage regulating module of each driving circuit controls its own voltage drop to be raised; and

When the voltage of the DC voltage source is lower than the preset voltage value, the voltage regulating module of each driving circuit does not control its own voltage drop.

26. The driving circuit adapted to wide voltage input according to claim 25, characterized in that:

The voltage regulation module comprises:

27. The driving circuit adapted to wide voltage input according to claim 25, characterized in that:

The voltage regulation module comprises:

28. The driving circuit adapted to wide voltage input according to claim 25, characterized in that:

The voltage regulation module comprises:

29. The driving circuit adapted to wide voltage input according to claim 25, characterized in that:

The voltage regulation module comprises:

30. The driving circuit adapted to wide voltage input according to claim 25, characterized in that:

31. The driving circuit adapted to wide voltage input according to claim 25, characterized in that:

32. The driving circuit adapted to wide voltage input according to claim 30, characterized in that:

33. The driving circuit adapted to wide voltage input according to claim 25, characterized in that:

The DC voltage source is a pulsating voltage obtained by rectifying the AC power through a rectifier; or

The DC voltage source is a stable voltage in the form of a non-pulsating voltage.

34. A driving circuit adapted to wide voltage input, characterized by comprising:

Power input terminal and potential reference terminal;

A constant current unit for providing a constant current, wherein the constant current unit and a load are arranged between a power input terminal and a potential reference terminal;

The voltage regulation module comprises:

When the voltage division value is lower than the threshold voltage, turning off the switch;

Among them, in the stage where the voltage of the DC voltage source increases from low to high, the voltage regulation module of each power consumption unit controls its own voltage drop to increase; and in the stage where the voltage of the DC voltage source decreases from high to low, the voltage regulation module of each power consumption unit exits the control of its own voltage drop.

35. A driving circuit adapted to wide voltage input, characterized by comprising:

Power input terminal and potential reference terminal;

The voltage regulation module comprises:

The control terminal of the junction field effect transistor is coupled to the potential reference terminal and the second terminal of the junction field effect transistor is coupled to the potential reference terminal through another clamping resistor;

36. A driving circuit adapted to wide voltage input, characterized by comprising:

Power input terminal and potential reference terminal;

The voltage regulation module comprises:

When the voltage division value is lower than the threshold voltage, turning off the current source;

37. A driving circuit adapted to wide voltage input, characterized by comprising:

Power input terminal and potential reference terminal;

The voltage regulation module comprises:

The current source is turned on only when the voltage drop of any of the driving circuits is not lower than a critical voltage, so that the Zener diode reversely breaks down and turns on; otherwise, the current source is turned off;