CN111511079A - Non-stroboscopic dimming driver utilizing input valley bottom compensation - Google Patents

Abstract

The invention discloses a stroboscopic-free dimming driver utilizing input valley compensation, comprising a safety module, a rectifier module, a dimming drive module, a valley compensation unit, a filter module, an input current waveform detection circuit, a power supply circuit, an electrolytic filter circuit and a De-ripple circuit, the input AC power is connected to the input end of the insurance module, the output end of the insurance module is connected to the rectifier module and the filter module in turn, the output end of the filter module is connected to the input end of the input current waveform detection circuit, the input current waveform detection circuit One end of the output end of the circuit is connected to the input end of the power supply circuit, and the other end outputs a dimming signal to the dimming drive module. The output end of the power supply circuit is connected to the input end of the dimming drive module, and the output end of the dimming drive module is connected to the electrolytic The filter circuit is connected with the de-ripple circuit, and the input end of the dimming drive module is also connected with the valley compensation unit. The invention realizes no flickering current output, has reliable dimming compatibility and low price.

Description

A Flicker-Free Dimming Driver Using Input Valley Compensation

technical field

The invention relates to the technical fields of DC power supplies and LED drivers, and in particular to a stroboscopic-free dimming driver utilizing input valley compensation.

Background technique

LEDs have the advantages of high luminous efficiency, long service life and good stability, and are widely used in the field of lighting. When using LED lighting or LED backlights, it is often required to be able to adjust the brightness of the LEDs. However, despite the continuous development of LED dimming technology, deficiencies in efficiency, reliability and compatibility have always hindered the service life and popularization of LED lighting systems.

The thyristor dimming technology of LED is developed by combining the traditional thyristor dimmer and the emerging LED driving technology, and is mainly used in the replacement LED lighting market. The thyristor dimmer was originally used for the dimming of incandescent lamps and fluorescent lamps. In the process of promoting LED lighting, it is required that the infrastructure of the existing lighting system cannot be changed. Therefore, if LED lamps can use thyristor dimmers for Dimming can greatly reduce the threshold for its entry into the market, and it is convenient to replace conventional lamps.

With the country's vigorous promotion of energy-saving products, the market demand for DC power supplies and LED drivers is increasing. Under various demand changes, the functions and requirements of power supplies and LED drivers are getting higher and higher. In the application of thyristor dimming, the thyristor dimmer is generally based on the 120V American standard, and the input voltage is low, and compared with the European standard of 220-240V, the input of the 120V American standard thyristor dimmer The current will be more than doubled, which has obvious advantages for the thyristor dimmer to maintain the current.

For the high-voltage side 220-240V European standard thyristor dimming, the relative technical difficulty is relatively large, especially in the input current subharmonic, it is difficult to meet the European certification standards, and because the high-voltage side 220-240V European standard can be The input voltage of the thyristor dimming is relatively high, and the input current is relatively small, which is difficult to meet the demand of the thyristor dimmer to maintain the current, and when the thyristor dimmer is adjusted to a small angle, the input current is prone to excessive oscillation. Zero, causing problems such as low-end strobe.

The common LED segmented constant current drive circuit structure needs to be connected to a thyristor dimmer before the rectifier bridge to form a dimming application. Since the thyristor dimmer must maintain a certain holding current to keep the ON state, the output current can be generated normally only when the input power frequency voltage VAC is greater than the output voltage Vout. Among them, the system has the problems of low driving efficiency and low power factor, and the system power will change with the change of the input voltage, and the power supply adjustment rate is poor. Due to the influence of multipath and external factors, the test performance is not ideal and also affects real-time communication.

However, the initial conduction angle and minimum conduction angle of various dimmers on the market are very different. For dimmers with small initial conduction angles, the initial power at the maximum conduction angle of the dimmer will be lower than that without dimming. The case of the dimmer is much lower; and for the dimmer with a large minimum conduction angle, the residual power of the dimmer at the minimum conduction angle will be relatively large. On the other hand, when the dimmer is adjusted so that the highest voltage of the input power frequency voltage Vin is close to the output voltage Vout, a slight change in the conduction angle of the dimmer will cause a significant difference in the output current, causing the lamp to flicker.

SUMMARY OF THE INVENTION

The invention is to overcome the technology in the prior art that when the thyristor dimming driver is adjusted to a smaller angle, the input current is prone to oscillate to zero, resulting in low-end stroboscopic, and the maintaining current of the thyristor dimming driver is difficult to meet. The problem is to provide a flicker-free dimming driver that uses input valley compensation. The voltage phase-cut method is used to change the output voltage for adjustment, and a single-stage thyristor dimming flyback power supply is used to add flicker-free and anti-ripple control. Circuit and valley compensation circuit, extract the input voltage valley signal to control the valley compensation circuit, and perform input current waveform correction at the valley bottom of each large cycle to improve the input current waveform to be closer to a sine wave, to improve the power factor PF, reduce The total harmonic THD and sub-harmonic meet the requirements of European certification standards, reduce the peak value of the turn-on current when the input current is at the bottom, reduce the peak oscillation amplitude, and directly raise the zero-crossing point under the dimming state of the thyristor to a certain height, so that the In the process of thyristor adjustment, the input current oscillation is not zero, and the problem of stroboscopic flicker under small maintenance current is solved, so as to realize the purpose of non-frequency flickering current output.

In order to achieve the above object, the present invention adopts the following technical solutions:

A stroboscopic-free dimming driver utilizing input valley compensation, the driver includes a fuse module, a rectifier module, a dimming drive module, a valley compensation unit, a filter module, an input current waveform detection circuit, a power supply circuit, an electrolytic filter circuit and a Ripple circuit, the input AC power is connected to the input end of the fuse module, the output end of the fuse module is connected to the rectifier module and the filter module in turn, and the output end of the filter module is connected to the input of the input current waveform detection circuit One end of the output end of the input current waveform detection circuit is connected to the input end of the power supply circuit, and the other end outputs a dimming signal to the dimming drive module, and the output end of the power supply circuit is connected to the input end of the dimming drive module , the output end of the dimming drive module is sequentially connected with the electrolytic filter circuit and the de-ripple circuit, and the input end of the dimming drive module is also connected with the valley compensation unit.

The present invention uses a de-ripple circuit to achieve the purpose of non-frequency flickering current, and uses a valley bottom compensation unit to correct the input current waveform at the valley bottom of each large cycle, so as to improve the input current waveform to be closer to a sine wave, so as to improve the power factor PF, reduce the total harmonic THD, and sub-harmonics to meet the requirements of European certification standards, reduce the peak turn-on current when the input current is at the bottom, reduce the peak oscillation amplitude, and directly raise the zero-crossing point under the dimming state of the thyristor to a certain value In order to achieve in the process of thyristor adjustment, the input current oscillation will not be zero, and the problem of stroboscopic under small maintenance current will be solved.

Preferably, the de-ripple circuit includes a flicker-free de-ripple chip US51, resistor RS71A, resistor RS71B, resistor RS73A, resistor RS73B, resistor RS74A, resistor RS74B, resistor RS74C, resistor RS74D, resistor RS74E, capacitor CS71, Capacitor CS72, capacitor CS73, capacitor CS74, Zener diode ZS71, diode DS71, MOS transistor Q71 and inductor L42, the VIN pin of the stroboscopic and anti-ripple chip US51 all the way through the capacitor CS71 and then connected to the ground, and the other way through the resistor RS71B and resistor RS71A are connected to the electrolytic filter circuit, and another way is connected to the negative pole of the Zener diode ZS71, the positive pole of the Zener diode ZS71 is connected to the ground, and the GND pin of the stroboscopic and anti-ripple chip US51 is directly connected to the ground. Connected to the ground, the VC pin of the stroboscopic-free anti-ripple chip US51 is connected to the ground through the capacitor CS72, and the other is connected to the ground through the resistor RS72. One of the VLMT pins is connected to the ground through the resistor RS73B, and the other is connected to one end of the resistor RS73A. The other end of the resistor RS73A is not only connected to the anode of the diode DS71, but also to the secondary winding of the inductor L42. The negative pole of the diode DS71 is connected to the electrolytic filter circuit, and the other way is connected to the same name terminal of the primary winding of the inductor L42. The same-named end of the secondary winding of the inductor L42 is also connected to the drain of the MOS transistor Q71, and the gate of the MOS transistor Q71 is connected to the VG pin of the stroboscopic anti-ripple chip US51. The VG pin of the ripple chip US51 is connected to the ground through the capacitor CS74, and the parallel circuit of the resistor RS74A, the resistor RS74B, the resistor RS74C, the resistor RS74D and the resistor RS74E is connected between the source of the MOS transistor Q71 and the ground. One end of the resistor RS74A and one end of the resistor RS74B are connected as an input end and connected to the VS pin of the non-stroboscopic and anti-ripple chip US51. The non-flickering and anti-ripple chip US51 adopts JW12510 type chip. The low-ripple DC signal is detected through the VIN pin, and the AC ripple is compared with the set reference voltage to output and drive the MOS transistor Q71 to enter the amplifying working state. A constant current output is performed to achieve the effect of de-ripple, thereby reducing the low ripple to a flicker-free state.

Preferably, the valley compensation unit includes a valley compensation circuit and an input voltage waveform detection circuit, the valley compensation circuit includes a resistor RS54, a resistor RS55, a resistor RS56, a capacitor CS53 and a triode QS53, and the input voltage waveform detection circuit includes a resistor RS53A, resistor RS53B and resistor RS53C, one end of the resistor RS53A is connected to the VDCBUS end, that is, to the rectifier module, the other end of the resistor RS53A is connected to one end of the resistor RS53B, and the other end of the resistor RS53B is connected to the resistor RS54 all the way through. The base of the transistor QS53 is connected to the ground, the other is connected to the ground after passing through the resistor RS53B, and the other is connected to the negative pole of the Zener diode ZS53, the positive pole of the Zener diode ZS53 is connected to the ground, and the emitter of the transistor QS53 is connected to The ground terminal is connected, the collector of the triode QS53 is connected to the VCC terminal of the power supply after passing through the resistor RS55, one is connected to the IS terminal after passing through the resistor RS56, and the other is connected to one end of the capacitor CS53, and the other end of the capacitor CS53 is connected. One end is connected to the ground. The input voltage waveform detection circuit extracts the voltage signal with the input voltage valley <3V to control the on-off of the transistor ZS53 in the valley compensation circuit. When the valley voltage is less than 3V, the transistor is not turned on, and the VCC passes through the valley compensation circuit to the chip US31. The peak detection pin is injected with a certain current, so that the duty cycle of the main MOS transistor Q41 is reduced by about 150us when the US31 chip is at the bottom, and the current of the input current waveform in the middle of the valley becomes smooth, making the entire input current waveform closer to a sine wave, thus effectively Improve the input power factor PF, reduce the total harmonic THD and sub-harmonic of the input current, and meet the requirements of European certification standards.

Preferably, the dimming drive module includes a thyristor dimmer and its peripheral circuit, the thyristor dimmer includes a single-stage thyristor dimming constant current chip US31, and the peripheral circuit includes a resistor RS35A , Resistor RS35B, Resistor RS35C, Resistor RS34A, Resistor RS34B, Resistor RS34C, Resistor RS32B, Resistor RS32A, Resistor RS32C, Resistor RS32D, Resistor RS32E, Diode DS31, MOS Tube Q41, Capacitor C43, Capacitor CS61, Capacitor CS34, Capacitor C61, Inductor L43, inductor L44 and inductor L41C, the VCC pin of the single-stage thyristor dimming constant current chip US31 is connected to the VCC terminal of the power supply all the way, one end is connected to one end of the capacitor CS61, the other is connected to the positive pole of the capacitor C61, and the other One way is connected to the power supply circuit, the other end of the capacitor CS61 is connected to the GND pin of the single-stage thyristor dimming constant current chip US31, and the GND pin of the single-stage thyristor dimming constant current chip US31 is connected to the GND pin of the capacitor C61. The negative pole is connected to the negative pole, the negative pole of the capacitor C61 is connected to the ground terminal, the Output pin of the single-stage thyristor dimming constant current chip US31 is connected to one end of the resistor RS35A after passing through the resistor RS35B, and the other end of the resistor RS35A is connected all the way through The resistor RS35C is connected to the ground, the other is connected to the gate of the MOS transistor Q41, the negative electrode of the diode DS31 is connected to one end of the resistor RS35A, the positive electrode of the diode DS31 is connected to the other end of the resistor RS35A, and the MOS transistor Q41 is connected to the other end. The drain is connected to one end of the inductor L44, and a parallel circuit of resistor RS32A, resistor RS32B, resistor RS32C, resistor RS32D and resistor RS32E is connected between the source and the ground terminal of the MOS transistor Q41. The single-stage controllable The Isence pin of the silicon dimming constant current chip US31 is connected to one end of the resistor RS32E after passing through the capacitor CS34, and the other end is connected to one end of the resistor RS34A, and the other end of the resistor RS34A is connected to the ground through the resistor RS34C and the switch K1. , one is connected to the IS terminal, that is, to the valley compensation unit, the other is connected to the source of the MOS transistor Q41 through the resistor RS34B, and the other end of the resistor RS32E is connected to the drain of the MOS transistor Q41 through the capacitor C43, so The VIN pin of the single-stage thyristor dimming constant current chip US31 is connected to the input current waveform detection circuit, and the other end of the inductor L44 is connected to the different end of the primary winding of the inductor L41C through the inductor L43. The inductor L41C The same-named end of the primary winding is connected to the power supply circuit. The unipolar thyristor dimming constant current chip US31 adopts the IW3605 model. In order to achieve the stability of the dimming power, the internal control driver output is set at the bottom of the input current, and the duty cycle of the driver turn-on time is increased to about 85%. , and about 300 microseconds at the bottom.

Preferably, the electrolytic filter circuit includes a rectifier diode D43A, a rectifier diode D43B, a rectifier diode D43C, a capacitor C43A, a capacitor C43B, a capacitor C43C and a capacitor C31A, and the difference between the secondary windings of the inductor L41C in the dimming drive module The name terminal is connected to the positive pole of diode D43A, the other way is connected to the positive pole of diode D43B, and the other way is connected to the positive pole of diode D43C. The negative electrode of capacitor C43C is connected to the negative electrode of capacitor C43D, and is connected to the ground terminal through capacitor C31A. The positive electrode of diode D43B is connected to the positive electrode of diode D43C and then connected to the positive electrode of capacitor C43A, and the other way is connected to the positive electrode of capacitor C43C. One way is connected to the positive pole of the capacitor C43C, and the other way is connected to one end of the resistor RS71A of the de-ripple circuit. The positive pole of the capacitor C43A and the positive pole of the capacitor C43B are connected to the positive pole of the diode D43A, and the positive pole of the capacitor C43C is also connected to the positive pole of the diode D43A. It is connected to the positive electrode of the capacitor C43D, and the negative electrode of the capacitor C43C is also connected to the negative electrode of the capacitor C43D.

Preferably, the rectifier module includes a rectifier circuit, and the rectifier circuit is composed of four diodes DS11, a diode DS12, a diode DS13 and a diode DS14, and the anode of the diode DS13 and the anode of the diode DS14 are connected to the ground. , the cathode of the diode DS11 and the cathode of the diode DS12 are connected as an output terminal, one way is connected to one end of the resistor RS53A of the input voltage waveform detection circuit, and the other is connected to the same name end of the inductor L41A of the dimming drive module. The DS11 The positive pole of the DS14 is connected to the negative pole of the DS14 and is connected to the fuse module as an input terminal.

Preferably, the filter module includes a resistor RS21, a resistor RS23, a capacitor C21, a capacitor C22, a capacitor C23, a diode DS21, an inductor L21 and a thermistor VD21. One end of the inductor L21 is connected to one end of the resistor R23 after passing through the capacitor C22. One end of the resistor R23 is also connected to the negative electrode of the diode DS21, the other end of the resistor R23 is connected to the positive electrode of the diode DS21, and the other end is connected to the positive electrode of the diode DS14 of the rectifier module, and the negative electrode of the diode DS12 of the rectifier module is connected. A capacitor C21 is connected in parallel with the anode of the diode DS14, the other end of the inductor L21 is connected to one end of the capacitor C23, the other end of the capacitor C23 is connected to the ground, and the two ends of the capacitor C23 are connected in parallel with a thermistor VD21, the two ends of the inductor L21 are connected in parallel with the resistor RS21.

Preferably, the fuse module includes a capacitor C11, a fuse resistor R11, an EMI common mode inductor L11, an EMI common mode inductor L12, and a thermistor D11. The X11A interface of the power supply is connected, one end of the fuse resistor R11 is connected to the X11B interface of the input AC power supply, and the other end of the fuse resistor R11 is connected to the synonymous end of the secondary winding of the EMI common mode inductor L11. The homonymous end of the primary winding of the EMI common mode inductor L11 is connected to the dissimilar end of the primary winding of the EMI common mode inductor L12, and the homonymous end of the secondary winding of the EMI common mode inductor L11 is connected to the secondary winding of the EMI common mode inductor L12 The opposite end of the thermistor D11 is connected to the same name end of the primary winding of the EMI common mode inductor L11, and the other end of the thermistor D11 is connected to the same name end of the secondary winding of the EMI common mode inductor L11, A capacitor C11 is connected between the same name terminal of the primary winding of the EMI common mode inductor L12 and the same name terminal of the secondary winding of the EMI common mode inductor L12, one end of the capacitor C11 is connected to the positive electrode of the diode DS11 of the rectifier module, and the other One end is connected to the cathode of the diode DS14.

Preferably, the input current waveform detection circuit includes a resistor RS31A, a resistor RS31B, a resistor RS31C and a capacitor CS31, and the power supply circuit includes a resistor RS62A, a resistor RS62B and a MOS transistor QS62, and the drain of the MOS transistor QS62 passes through the resistor RS62B It is then connected to one end of the resistor RS62A, the other end of the resistor RS62A is connected to the same-named end of the primary winding of the inductor L41C, and the other is connected to one end of the inductor L21 in the filter module. The source of the MOS transistor QS62 is connected to the single The VCC pin of the thyristor dimming constant current chip US31 is connected, one end of the resistor RS31A is connected to the VDCBUS end, the other end of the resistor RS31A is connected to one end of the resistor RS31C through the resistor RS31B, and the other end of the resistor RS31C is all the way It is connected to the gate of the MOS transistor QS62, and the other is connected to one end of the capacitor CS33 after passing through the capacitor CS31. The power supply circuit provides the initial power VCC for the driver.

The beneficial effects of the invention are as follows: 1. The purpose of outputting current without flicker is realized by using the anti-ripple circuit, the dimming compatibility is reliable, and the price is low; The peak oscillation amplitude, and the zero-crossing point in the thyristor dimming state is directly raised to a certain height, so as to make the input current oscillation not zero during the thyristor adjustment process, and solve the stroboscopic problem under small maintenance current; 3 .Using the input voltage waveform detection circuit to extract the input voltage valley signal to control the valley compensation circuit, and correct the input current waveform at the valley bottom of each large cycle to improve the input current waveform to be closer to a sine wave to improve the power factor PF , reduce the total harmonic THD, and sub-harmonics meet the requirements of European certification standards.

Description of drawings

FIG. 1 is a block diagram of a circuit principle connection structure of the present invention.

Fig. 2 is a circuit principle connection diagram of the present invention.

FIG. 3 is a block diagram of another circuit principle connection structure of the present invention.

Fig. 4 is another circuit principle connection diagram of the present invention.

In the figure 1. insurance module, 2. rectifier module, 3. dimming drive module, 301. thyristor dimmer, 4. valley compensation unit, 401. input voltage waveform detection circuit, 5. filter module, 6. input Current waveform detection circuit, 7. Power supply circuit, 8. Electrolytic filter circuit, 9. De-ripple circuit.

Detailed ways

The technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

Embodiment 1: A stroboscopic-free dimming driver using input valley compensation according to Embodiment 1. As shown in FIG. 1, the driver includes a fuse module 1, a rectifier module 2, a dimming drive module 3, a valley compensation unit 4, Filter module 5, input current waveform detection circuit 6, power supply circuit 7, electrolytic filter circuit 8 and de-ripple circuit 9, the input AC power supply is connected to the input end of the fuse module 1, and the output end of the fuse module 1 is connected to the rectifier module 2 and the rectifier module 1 in turn. The filter module 5 is connected, the output end of the filter module 5 is connected with the input end of the input current waveform detection circuit 6, one end of the output end of the input current waveform detection circuit 6 is connected with the input end of the power supply circuit 7, and the other end outputs the dimming signal to the adjustment In the light drive module 3, the output end of the power supply circuit 7 is connected with the input end of the dimming drive module 3, and the output end of the dimming drive module 3 is connected with the electrolytic filter circuit 8 and the de-ripple circuit 9 in turn. The input terminal is also connected to the valley compensation unit 4 .

As shown in FIG. 2 , the anti-ripple circuit 9 includes a flicker-free anti-ripple chip US51, a resistor RS71A, a resistor RS71B, a resistor RS73A, a resistor RS73B, a resistor RS74A, a resistor RS74B, a resistor RS74C, a resistor RS74D, a resistor RS74E, and a capacitor CS71 , capacitor CS72, capacitor CS73, capacitor CS74, Zener diode ZS71, diode DS71, MOS transistor Q71 and inductor L42, the VIN pin of the no stroboscopic and anti-ripple chip US51 is connected to the ground through the capacitor CS71 all the way through the resistor RS71B It is connected to the electrolytic filter circuit 8 after it is connected with the resistor RS71A, and another way is connected to the negative electrode of the Zener diode ZS71. The positive electrode of the Zener diode ZS71 is connected to the ground terminal, and the GND pin of the non-flicker and ripple removal chip US51 is directly connected to the ground terminal. , the VC pin of the non-stroboscopic anti-ripple chip US51 is connected to the ground through the capacitor CS72, the other is connected to the ground through the resistor RS72, and the VLMT pin of the non-stroboscopic anti-ripple chip US51 is connected to the ground through the resistor RS73B The ground is connected to the ground, and the other is connected to one end of the resistor RS73A. The other end of the resistor RS73A is not only connected to the positive pole of the diode DS71, but also to the same-named end of the secondary winding of the inductor L42. The negative pole of the diode DS71 is connected to the electrolytic filter circuit 8 all the way. The other way is connected to the same name terminal of the primary winding of the inductor L42, the synonym end of the primary winding of the inductor L42 is connected to the X41A port, the synonym end of the secondary winding of the inductor L42 is connected to the X41A port, and the same name terminal of the secondary winding of the inductor L42 is also connected to the MOS. The drain of the tube Q71 is connected to the drain of the MOS tube Q71, and the gate of the MOS tube Q71 is connected to the VG pin of the non-stroboscopic anti-ripple chip US51. A parallel circuit of resistor RS74A, resistor RS74B, resistor RS74C, resistor RS74D and resistor RS74E is connected between the source and the ground terminal of the resistor. The VS pin of US51 is connected.

The valley compensation unit 4 includes a valley compensation circuit and an input voltage waveform detection circuit 401. The valley compensation circuit includes a resistor RS54, a resistor RS55, a resistor RS56, a capacitor CS53 and a triode QS53, and the input voltage waveform detection circuit 401 includes a resistor RS53A, a resistor RS53B and a resistor RS53C. , one end of the resistor RS53A is connected to the VDCBUS end, that is, to the rectifier module 2, the other end of the resistor RS53A is connected to one end of the resistor RS53B, the other end of the resistor RS53B is connected to the base of the transistor QS53 all the way through the resistor RS54, and the other end of the resistor RS53B is connected to the base of the transistor QS53 all the way through the resistor The RS53B is connected to the ground terminal, and another road is connected to the negative terminal of the Zener diode ZS53, the positive terminal of the Zener diode ZS53 is connected to the ground terminal, the emitter of the transistor QS53 is connected to the ground terminal, and the collector of the transistor QS53 is connected all the way through a resistor RS55 is connected to the VCC terminal of the power supply, one is connected to the IS terminal after passing through the resistor RS56, and the other is connected to one end of the capacitor CS53, and the other end of the capacitor CS53 is connected to the ground terminal.

The dimming drive module 3 includes a thyristor dimmer 301 and its peripheral circuit. The thyristor 301 includes a single-stage thyristor dimming constant current chip US31, and the peripheral circuit includes a resistor RS35A, a resistor RS35B, a resistor RS35C, Resistor RS34A, Resistor RS34B, Resistor RS34C, Resistor RS32B, Resistor RS32A, Resistor RS32C, Resistor RS32D, Resistor RS32E, Diode DS31, MOS Tube Q41, Capacitor C43, Capacitor CS61, Capacitor CS34, Capacitor C61, Inductor L43, Inductor L44 and Inductance L41C, the VCC pin of the single-stage thyristor dimming constant current chip US31 is connected to the VCC terminal of the power supply, one is connected to one end of the capacitor CS61, the other is connected to the positive pole of the capacitor C61, and the other is connected to the power supply circuit 7. The capacitor CS61 The other end is connected to the GND pin of the single-stage thyristor dimming constant current chip US31, the GND pin of the single-stage thyristor dimming constant current chip US31 is connected to the negative electrode of the capacitor C61, and the negative electrode of the capacitor C61 is connected to the ground terminal. The Output pin of the single-stage thyristor dimming constant current chip US31 is connected to one end of the resistor RS35A through the resistor RS35B, the other end of the resistor RS35A is connected to the ground through the resistor RS35C, and the other is connected to the gate of the MOS transistor Q41 , the cathode of the diode DS31 is connected to one end of the resistor RS35A, the anode of the diode DS31 is connected to the other end of the resistor RS35A, the drain of the MOS transistor Q41 is connected to one end of the inductor L44, and the source of the MOS transistor Q41 is connected to both ends of the ground. A parallel circuit is connected with resistor RS32A, resistor RS32B, resistor RS32C, resistor RS32D and resistor RS32E. The Isence pin of the single-stage thyristor dimming constant current chip US31 is connected to one end of the resistor RS32E after passing through the capacitor CS34, and the other is connected to the resistor. One end of RS34A is connected to the ground, the other end of the resistor RS34A is connected to the ground through the resistor RS34C and the switch K1, the other end is connected to the IS end, that is, to the valley compensation unit 4, and the other end is connected to the source of the MOS transistor Q41 through the resistor RS34B. The other end of the resistor RS32E is connected to the drain of the MOS transistor Q41 through the capacitor C43, the VIN pin of the single-stage thyristor dimming constant current chip US31 is connected to the input current waveform detection circuit 6, and the other end of the inductor L44 is connected to the input current waveform detection circuit 6. After L43 is connected to the synonymous end of the primary winding of the inductor L41C, and the synonymous end of the primary winding of the inductor L41C is connected to the power supply circuit 7 .

The electrolytic filter circuit 8 includes a rectifier diode D43A, a rectifier diode D43B, a rectifier diode D43C, a capacitor C43A, a capacitor C43B, a capacitor C43C and a capacitor C31A. The positive pole of the inductance L41 is connected to the positive pole, one is connected to the positive pole of the diode D43B, and the other is connected to the positive pole of the diode D43C. The negative pole is connected to the ground through the capacitor C31A, the positive pole of the diode D43B is connected to the positive pole of the diode D43C, and the other way is connected to the positive pole of the capacitor C43A, the other way is connected to the positive pole of the capacitor C43C, the other way is connected to the positive pole of the capacitor C43C, One way is connected to one end of the resistor RS71A of the de-ripple circuit 9, the positive electrode of the capacitor C43A and the positive electrode of the capacitor C43B are connected to the positive electrode of the diode D43A, the positive electrode of the capacitor C43C is also connected to the positive electrode of the capacitor C43D, and the negative electrode of the capacitor C43C is also connected to The negative terminal of capacitor C43D is connected.

The rectifier module 2 includes a rectifier circuit. The rectifier circuit consists of four diodes DS11, DS12, diode DS13 and diode DS14. The anode of the diode DS13 and the anode of the diode DS14 are connected to the ground. The cathode of the diode DS11 is connected to the diode DS12. The negative pole is connected as an output terminal, one way is connected to one end of the resistor RS53A of the input voltage waveform detection circuit 401, the other way is connected to the same name terminal of the inductance L41A of the dimming drive module 3, the positive pole of DS11 is connected to the negative pole of DS14 and used as an input The terminal is connected to the insurance module 1.

The filter module 5 includes a resistor RS21, a resistor RS23, a capacitor C21, a capacitor C22, a capacitor C23, a diode DS21, an inductor L21 and a thermistor VD21. One end of the inductor L21 is connected to one end of the resistor R23 through the capacitor C22, and one end of the resistor R23 is also connected. It is connected to the cathode of the diode DS21, the other end of the resistor R23 is connected to the anode of the diode DS21, and the other is connected to the anode of the diode DS14 of the rectifier module 2. There is a parallel connection between the cathode of the diode DS12 of the rectifier module 2 and the anode of the diode DS14. Capacitor C21, the other end of the inductor L21 is connected to one end of the capacitor C23, the other end of the capacitor C23 is connected to the ground, the two ends of the capacitor C23 are connected in parallel with the thermistor VD21, and the two ends of the inductor L21 are connected in parallel with the resistor RS21.

The fuse module 1 includes a capacitor C11, a fuse resistor R11, an EMI common mode inductor L11, an EMI common mode inductor L12, and a thermistor D11. The synonymous end of the primary winding of the EMI common mode inductor L11 is connected to the X11A interface of the input AC power supply. One end of the resistor R11 is connected to the X11B interface of the input AC power supply, and the other end of the fuse resistor R11 is connected to the other end of the secondary winding of the EMI common mode inductor L11, and the same name end of the primary winding of the EMI common mode inductor L11 is connected to the EMI common mode The synonymous end of the primary winding of the inductor L12 is connected, the synonymous end of the secondary winding of the EMI common mode inductor L11 is connected to the synonymous end of the secondary winding of the EMI common mode inductor L12, and one end of the thermistor D11 is connected to the EMI common mode inductor The same name terminal of the primary winding of L11 is connected, the other end of the thermistor D11 is connected to the same name terminal of the secondary winding of the EMI common mode inductor L11, and the same name terminal of the primary winding of the EMI common mode inductor L12 is connected to the secondary winding of the EMI common mode inductor L12. A capacitor C11 is connected between the ends of the same name of the stage winding, one end of the capacitor C11 is connected to the positive electrode of the diode DS11 of the rectifier module, and the other end is connected to the negative electrode of the diode DS14.

The input current waveform detection circuit 6 includes a resistor RS31A, a resistor RS31B, a resistor RS31C and a capacitor CS31, and the power supply circuit 7 includes a resistor RS62A, a resistor RS62B and a MOS transistor QS62. The drain of the MOS transistor QS62 is connected to one end of the resistor RS62A after passing through the resistor RS62B. The other end of the resistor RS62A is connected to the same name end of the primary winding of the inductor L41C, and the other end is connected to one end of the inductor L21 in the filter module 5. The source of the MOS transistor QS62 is connected to the single-stage thyristor dimming constant current chip US31. The VCC pin is connected, one end of the resistor RS31A is connected to the VDCBUS end, the other end of the resistor RS31A is connected to one end of the resistor RS31C through the resistor RS31B, the other end of the resistor RS31C is connected to the gate of the MOS transistor QS62 all the way, and the other end of the resistor RS31C is connected to the gate of the MOS transistor QS62. Connect to one end of capacitor CS33.

The working process of this embodiment is as follows: the input AC power first passes through the fuse resistor R11, EMI common mode inductor L11 and EMI common mode inductor L12 of the fuse module 1, and then passes through the rectifier diode DS11, rectifier diode DS12, and rectifier diode DS13 of the rectifier module 2 After being rectified by the rectifier diode DS14 and filtered by the capacitor C21 and the capacitor C23 in the filter module 5, the input current waveform detection circuit composed of the resistor RS31A, the resistor RS31B, the resistor RS31C and the capacitor CS31 supplies the single-stage thyristor dimming constant current chip The VIN pin of the US31 provides the input current waveform, and drives the power supply circuit composed of the resistor RS62A, the resistor RS62B and the MOS transistor QS62 to provide the initial VCC to the dimming drive module 3.

When the initial VCC of capacitor C61 reaches 14V, the single-stage thyristor dimming constant current chip US31 starts to work, and the output of the resistor RS35B and the resistor RS35A drives the MOS transistor Q41 to turn on. When the MOS transistor Q41 is turned on, the MOS transistor Q41 turns on. The excitation inductor L43 stores energy. When the MOS tube Q41 is turned off, the energy of the inductor L43 is output to the electrolytic filter circuit 8, and is rectified by the rectifier diode D43. After electrolytic filtering by the capacitor C43, a low ripple DC voltage is obtained and superimposed to remove the ripple. both ends of the wave circuit.

When the resistor RS71A and the resistor RS71B of the de-ripple circuit charge the capacitor CS71 to VDD to 9V, the stroboscopic and de-ripple chip US51 of the de-ripple circuit, namely the chip JW12510, starts to work. The chip first provides a low ripple DC signal to the VIN pin of the chip JW12510 through the resistor RS71A and the resistor RS71B for detection, and the AC ripple is compared with the reference voltage set by the capacitor CS72 connected to the VC pin of the chip JW12510. The MOS transistor Q71 is driven by the output to follow, so that the driver enters the amplifying working state and performs constant current output, so as to achieve the effect of removing ripple and reduce the low ripple to the state of no stroboscopic.

When the input current waveform detection circuit provides the input voltage waveform to the VIN pin of the chip IW3605, and the chip IW3605 recognizes that it is at the bottom of the valley, the chip IW3605 drives the signal to the main MOS transistor Q41 through the resistor RS35A and the resistor RS35B. The empty ratio is increased to about 85%, and the duration is about 300us at the bottom of the valley, which causes the input current waveform to be pulled too much by the chip at the bottom of the valley, and the bottom of the input current waveform is not smooth, resulting in the total harmonic THD and sub-harmonics. Meet the requirements of European certification standards.

In order to solve this problem, an input voltage waveform detection circuit composed of resistor RS53A, resistor RS53B and resistor RS53C is used to extract the voltage signal when the input voltage is at the bottom of the valley <3V, and control the transistor QS53 in the valley bottom compensation circuit through the resistor RS54. When the input voltage is less than 3V at the valley bottom, the transistor QS53 is turned off, and the VCC terminal of the power supply flows into the peak detection pin Isense pin of the chip IW3605 through the resistor RS55 and the resistor RS56 in the valley bottom compensation circuit, so that the chip IW3605 is at the bottom of the valley. Reduce the amplitude of the drive signal and reduce the duty cycle of the drive signal to <60% for about 150us, so that the entire input current waveform becomes smoother at the bottom of the valley, making the entire input current waveform closer to a sine wave. Effectively improve the input power factor PF, reduce the total harmonic THD and sub-harmonic of the input current, and meet the requirements of European certification standards.

When connected to the thyristor dimmer, the input current waveform detection circuit composed of resistor RS31A, resistor RS31B, resistor RS31C and capacitor CS31 provides a dimming signal to the VIN pin inside the chip IW3605, and is identified and judged by the chip IW3605 Which dimming working state of the thyristor dimmer is, at this time, the active bleeder SNB pin on the chip IW3605 works, and the excess current after the dimmer is phase-cut is released through the resistor RS62A, the resistor RS62B and the MOS tube QS62.

The waveform of the input current is deformed after the phase is cut by the dimmer, mainly because there is no input current in the cycle after the phase is cut by the dimmer, and all the required output current is provided during the operation of the dimmer, resulting in the moment when the dimmer works. The charging peak current is very large, which oscillates with the internal inductance and capacitance of the driver, causing the input current to oscillate across zero. In order to reduce the charging peak current at the moment of operation of the dimmer, the input voltage waveform of the resistor RS53A, the resistor RS53B and the resistor RS53C is used to detect the dimmer, and the compensation time is controlled by the resistor RS54 and the transistor QS53, while the resistor RS55 and the resistor RS56 and the filter Capacitor CS53 provides compensation size, and then resistor RS34A and resistor RS34B inject a certain current into the peak detection pin Isense pin of chip IW3605, so that the driving duty cycle during chip turn-on is reduced from >85% to about <60%, so that The peak value of the dimmer is reduced by about 1/3 at the moment of charging, and the output energy needs to be maintained after it is turned on, so the peak-to-peak amplitude of the input current oscillation is narrowed, so that the average value of the lower limit of the current oscillation during the entire dimming period is raised to above the zero potential, and the oscillation is not zero. , so as to maintain a stable thyristor working process. Solve the problem of flickering under small holding current.

Embodiment 2: A stroboscopic-free dimming driver using input valley compensation according to Embodiment 2, as shown in FIG. The input AC power is connected to the input end of the fuse module 1, the output end of the fuse module 1 is connected to the input end of the rectifier module 2, the output end of the rectifier module 2 is connected to one end of the input end of the dimming drive module 3, and the dimming drive module 3 The other end of the input end of the dimming signal is connected to the dimming signal, and the output end of the dimming driving module 3 is connected to the valley compensation unit 4 .

As shown in FIG. 4 , the dimming drive module 3 includes a thyristor dimmer 301 and its peripheral circuit. The peripheral circuit includes a capacitor CS61, a resistor RS35A, a resistor RS35B, a resistor RS35C, a resistor RS32A, a resistor RS32C, a resistor RS32D, and a resistor RS32E. , diode DS31, MOS transistor Q41 and inductor L41A, the drain of MOS transistor Q41 is connected to the same name terminal of inductor L41A, the gate of MOS transistor Q41 is connected to the anode of diode DS31 all the way, and the other way is directly connected to ground after passing through resistor RS35C, and the other All the way through the resistor RS35A and the resistor RS35B, it is connected to the thyristor dimmer. The negative electrode of the diode DS31 is connected to one end of the resistor 35A. The resistor RS32D and the resistor RS32E are connected in parallel, the source of the MOS transistor Q41 is connected to the valley compensation unit 4, the drain of the MOS transistor Q41 is connected to the synonymous end of the inductor L41A, and the synonymous end of the inductor L41A is connected to the valley compensation unit 4.

The thyristor dimmer 301 includes a single-stage thyristor dimming constant current chip US31, one of the VCC pins of the single-stage thyristor dimming and constant current chip US31 is connected to the VCC terminal of the power supply, and the other is connected to one end of the capacitor CS61. The other end of the capacitor CS61 is not only connected to the GND pin of the single-stage thyristor dimming constant current chip US31, but also connected to the valley compensation unit 4. The Output pin of the single-stage thyristor dimming constant current chip US31 is connected to one end of the resistor RS35B The Isense pin of the single-stage thyristor dimming constant current chip US31 is connected to the valley compensation unit 4, and the VIN pin of the single-stage thyristor dimming constant current chip US31 is connected to the dimming signal.

The valley compensation unit 4 includes a valley compensation circuit. The valley compensation circuit includes a Zener diode ZS53, a resistor RS54, a resistor RS55, a transistor QS53 and a capacitor CS53. The positive pole of the Zener diode ZS53 is connected to the other end of the capacitor CS61 of the dimming drive module 3. , one way is connected to one end of the resistor RS53C of the input voltage waveform detection circuit, one way is connected to the ground end, and the other way is connected to one end of the capacitor CS53, the negative electrode of the Zener diode ZS53 is connected to the other end of the resistor RS53C, and the other way is connected to the other end of the resistor RS53C. The RS54 is connected to the base of the transistor QS53, the emitter of the transistor QS53 is directly grounded, the collector of the transistor QS53 is connected to the VCC terminal of the power supply after passing through the resistor RS55, and the collector and the emitter of the transistor QS53 are connected in parallel with the capacitor CS53.

The valley compensation circuit also includes resistor RS56, resistor RS34A, resistor RS34B, resistor RS32B and capacitor CS34. One end of the resistor RS56 is connected to the collector of the transistor QS53, the other end is connected to one end of the resistor RS34A, and the other end is connected to one end of the resistor RS34B. , the other end of the resistor RS34B is connected to the other end of the resistor RS34A after passing through the resistor RS32B and the capacitor CS34. The two ends of the resistor RS32B are connected in parallel with the resistor RS32A, and the other end of the resistor RS34A is connected to the Isense of the single-stage thyristor dimming constant current chip US31 feet connected.

The valley compensation unit 4 also includes an input voltage waveform detection circuit. The input voltage waveform detection circuit includes a resistor RS53A, a resistor RS53B and a resistor RS53C. One end of the resistor RS53A is connected to the rectifier module 2, and the other is connected to the same name of the inductor L41A. The other end of the resistor is connected to one end of the resistor RS53C after passing through the resistor RS53B, and the other end of the resistor RS53C is connected to the positive electrode of the Zener diode ZS53.

The rectifier module 2 includes a rectifier circuit. The rectifier circuit consists of four diodes DS11, DS12, diode DS13 and diode DS14. The anode of the diode DS13 and the anode of the diode DS14 are connected to the ground. The cathode of the diode DS11 is connected to the diode DS12. The negative pole is connected as an output terminal, one way is connected to one end of the resistor RS53A of the input voltage waveform detection circuit, and the other is connected to the same name terminal of the inductance L41A of the dimming drive module 3. The positive pole of DS11 is connected to the negative pole of DS14 and used as an input terminal Connect to insurance module 1.

The fuse module 1 includes a capacitor C11, a fuse resistor R11, an EMI common mode inductor L11, an EMI common mode inductor L12, and a thermistor D11. The synonymous end of the primary winding of the EMI common mode inductor L11 is connected to the X11A interface of the input AC power supply. One end of the resistor R11 is connected to the X11B interface of the input AC power supply, and the other end of the fuse resistor R11 is connected to the other end of the secondary winding of the EMI common mode inductor L11, and the same name end of the primary winding of the EMI common mode inductor L11 is connected to the EMI common mode The synonymous end of the primary winding of the inductor L12 is connected, the synonymous end of the secondary winding of the EMI common mode inductor L11 is connected to the synonymous end of the secondary winding of the EMI common mode inductor L12, and one end of the thermistor D11 is connected to the EMI common mode inductor The same name terminal of the primary winding of L11 is connected, the other end of the thermistor D11 is connected to the same name terminal of the secondary winding of the EMI common mode inductor L11, and the same name terminal of the primary winding of the EMI common mode inductor L12 is connected to the secondary winding of the EMI common mode inductor L12. A capacitor C11 is connected between the ends of the same name of the stage winding, one end of the capacitor C11 is connected to the positive electrode of the diode DS11 of the rectifier module, and the other end is connected to the negative electrode of the diode DS14.

The working process of this embodiment is as follows: the input AC power first passes through the fuse resistor R11, EMI common mode inductor L11 and EMI common mode inductor L12 of the fuse module 1, and then passes through the rectifier diode DS11, rectifier diode DS12, and rectifier diode DS13 of the rectifier module 2 It is rectified with the rectifier diode DS14. When the initial VCC of the capacitor CS61 reaches 14V, the single-stage thyristor dimming constant current chip US31, that is, the chip IW3605, starts to work, and the output of the resistor RS35B and the resistor RS35A drives the MOS tube Q41 to turn on. After the tube Q41 is turned on, the MOS tube Q41 stores energy for the flyback inductor L41A, the duty cycle of the driving signal is increased to about 85%, and the duration is about 300us at the bottom of the valley, which causes the input current waveform to be pulled by the chip too much current at the bottom of the valley. The input current waveform is not smooth at the bottom, resulting in the total harmonic THD and sub-harmonic completely unable to meet the requirements of European certification standards.

In order to solve this problem, an input voltage waveform detection circuit composed of resistor RS53A, resistor RS53B and resistor RS53C is used to extract the voltage signal when the input voltage is at the bottom of the valley <3V, and control the transistor QS53 in the valley bottom compensation circuit through the resistor RS54. When the input voltage is less than 3V at the valley bottom, the transistor QS53 is turned off, and the VCC terminal of the power supply flows into the peak detection pin Isense pin of the chip IW3605 through the resistor RS55 and the resistor RS56 in the valley bottom compensation circuit, so that the chip IW3605 is at the bottom of the valley. Reduce the amplitude of the drive signal and reduce the duty cycle of the drive signal to <60% for about 150us, so that the entire input current waveform becomes smoother at the bottom of the valley, making the entire input current waveform closer to a sine wave. Effectively improve the input power factor PF, reduce the total harmonic THD and sub-harmonic of the input current, and meet the requirements of European certification standards.

The waveform of the input current is deformed after the phase is cut by the dimmer, mainly because there is no input current in the cycle after the phase is cut by the dimmer, and all the required output current is provided during the operation of the dimmer, resulting in the moment when the dimmer works. The charging peak current is very large, which oscillates with the internal inductance and capacitance of the driver, causing the input current to oscillate across zero. In order to reduce the charging peak current at the moment of operation of the dimmer, the input voltage waveform of the resistor RS53A, the resistor RS53B and the resistor RS53C is used to detect the dimmer, and the compensation time is controlled by the resistor RS54 and the transistor QS53, while the resistor RS55 and the resistor RS56 and the filter Capacitor CS53 provides compensation size, and then resistor RS34A and resistor RS34B inject a certain current into the peak detection pin Isense pin of chip IW3605, so that the driving duty cycle during chip turn-on is reduced from >85% to about <60%, so that The peak value of the dimmer is reduced by about 1/3 at the moment of charging, and the output energy needs to be maintained after it is turned on, so the peak-to-peak amplitude of the input current oscillation is narrowed, so that the average value of the lower limit of the current oscillation during the entire dimming period is raised to above the zero potential, and the oscillation is not zero. , so as to maintain a stable thyristor working process. Solve the problem of flickering under small holding current.

The present invention overcomes the technical problems in the prior art that when the thyristor dimming driver is adjusted to a smaller angle, the input current oscillates easily to cross zero, resulting in low-end stroboscopic, and the maintaining current of the thyristor dimming driver is difficult to satisfy, The anti-ripple circuit is used to achieve the purpose of flicker-free current output, the dimming compatibility is reliable, and the price is low; the valley compensation circuit is used to reduce the peak current of the input current at the valley bottom, reduce the peak oscillation amplitude, and adjust the thyristor to adjust The zero-crossing point in the light state is directly raised to a certain height, so as to make the input current oscillate more than zero during the adjustment process of the thyristor, and solve the stroboscopic problem under small maintenance current; the input voltage waveform detection circuit is used to detect the input voltage valley signal. It is extracted to control the valley compensation circuit, and the input current waveform is corrected at the valley bottom of each large cycle to improve the input current waveform to be closer to a sine wave, to improve the power factor PF, reduce the total harmonic THD, and meet the subharmonic requirements. European certification standard requirements.

The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Although the terms such as AC power supply, rectifier tube, power supply VCC, compensation current, etc. are used more in this paper, the possibility of using other terms is not excluded, and these terms are only used to describe and explain the essence of the present invention more conveniently.

Claims (9)

1. A non-stroboscopic dimming driver utilizing input valley bottom compensation is characterized by comprising a safety module (1), a rectifying module (2), a dimming driving module (3), a valley bottom compensation unit (4), a filtering module (5), an input current waveform detection circuit (6), a power supply circuit (7), an electrolytic filtering circuit (8) and a ripple removing circuit (9), wherein an input AC power supply is connected with the input end of the safety module (1), the output end of the safety module (1) is sequentially connected with the rectifying module (2) and the filtering module (5), the output end of the filtering module (5) is connected with the input end of the input current waveform detection circuit (6), one end of the output end of the input current waveform detection circuit (6) is connected with the input end of the power supply circuit (7), and the other end of the input current waveform detection circuit outputs a dimming signal to the dimming driving module (3), the output end of the power supply circuit (7) is connected with the input end of the dimming driving module (3), the output end of the dimming driving module (3) is sequentially connected with the electrolytic filter circuit (8) and the ripple removing circuit (9), and the input end of the dimming driving module (3) is also connected with the valley bottom compensation unit (4).

2. The non-strobe dimming driver with input valley compensation as claimed in claim 1, wherein the deglitching circuit (9) comprises a non-strobe deglitching chip US, a resistor RS71, a resistor RS73, a resistor RS74, a capacitor CS, a zener diode ZS, a diode DS, a MOS transistor Q and an inductor 42, wherein one leg of VIN of the non-strobe deglitching chip US is connected to ground through the capacitor CS, one leg of VIN is connected to an electrolytic filter circuit (8) through the resistor RS71 and the resistor RS71, and one leg of VIN is connected to the cathode of the zener diode ZS, the anode of the zener diode ZS is connected to ground, the GND leg of the non-strobe deglitching chip US is directly connected to ground, the leg of the non-strobe deglitching chip US is connected to ground through the capacitor CS, the other leg of the ballast diode ZS is connected to ground, the drain leg of the resistor RS74, the resistor RS74 is connected to the drain leg of the dc resistor RS 42, the drain leg of the dc resistor RS74 is connected to the dc resistor CS, the dc resistor RS74, the drain leg of the dc resistor CS is connected to the dc resistor CS, the dc resistor RS 42, the dc resistor RS74 is connected to the dc resistor CS, and the dc resistor CS, the dc resistor CS are connected to the dc resistor CS, and the dc resistor CS are connected to the dc resistor CS, and dc resistor CS are connected to the dc resistor CS, and dc resistor CS.

3. A strobeless dimming driver with input valley compensation according to claim 1, wherein the valley compensation unit (4) comprises a valley compensation circuit and an input voltage waveform detection circuit (401), the valley compensation circuit comprises a resistor RS54, a resistor RS55, a resistor RS56, a capacitor CS53 and a transistor QS53, the input voltage waveform detection circuit (401) comprises a resistor RS53A, a resistor RS53B and a resistor RS53C, one end of the resistor RS53A is connected to the VDCBUS terminal, i.e. to the rectifying module (2), the other end of the resistor RS53A is connected to one end of the resistor RS53B, the other end of the resistor RS53B is connected to the base of the transistor QS53 through the resistor RS54, one end of the resistor RS53B is connected to the ground terminal, and one end of the resistor RS53 53 is connected to the cathode of a zener diode ZS53, the anode of the zener diode ZS53 is connected to the ground terminal, the emitter QS of the transistor QS53 is connected to the ground terminal, one path of a collector of the transistor QS53 IS connected with a power supply VCC end through a resistor RS55, one path of the collector IS connected with an IS end through a resistor RS56, the other path of the collector IS connected with one end of a capacitor CS53, and the other end of the capacitor CS53 IS connected with a ground end.

4. The strobeless dimming driver using input valley bottom compensation according to claim 1, wherein the dimming driving module (3) includes a thyristor dimmer (301) and a peripheral circuit thereof, the thyristor dimmer (301) includes a single-stage thyristor dimming constant current chip US, the peripheral circuit includes a resistor RS35, a resistor RS34, a resistor RS32, a diode DS, a MOS transistor Q, a capacitor C, a capacitor CS, a capacitor C, an inductor 43, an inductor 44 and an inductor 41C, one path of a VCC pin of the single-stage dimming constant current chip US IS connected to a power supply VCC terminal VCC, one path IS connected to one end of the capacitor CS, one path IS connected to a positive electrode of the capacitor C, one path IS connected to a power supply circuit (7), the other end of the capacitor CS IS connected to a pin of the thyristor dimming chip US, the single-stage dimming chip US pin IS connected to a negative electrode of the capacitor CS, the capacitor C IS connected to a negative electrode of the power supply circuit RS32, a negative electrode of the capacitor CS IS connected to a power supply circuit RS32, a drain electrode of the resistor RS32, a drain electrode of the thyristor RS32 IS connected to a drain electrode of the single-resistor RS35, a resistor RS32, a drain resistor RS32 of the resistor RS35, a resistor RS32 IS connected to a drain resistor RS32, a drain resistor RS35, a drain resistor RS32 of the resistor RS32 IS connected to a resistor RS32, a resistor RS35, a resistor RS32, a resistor RS32 IS connected to a resistor RS32 to a resistor RS32 to a resistor RS, a resistor RS32 to a resistor RS, a resistor RS resistor.

5. A non-strobe dimming driver using input valley compensation according to claim 1, 2 or 4, wherein the electrolytic filter circuit (8) comprises a rectifying diode D43A, a rectifying diode D43B, a rectifying diode D43C, a capacitor C43A, a capacitor C43B, a capacitor C43C and a capacitor C31A, one of the different-name terminals of the secondary winding of the inductor L C in the dimming driving module (3) is connected to the anode of the diode D43A, one of the different-name terminals is connected to the anode of the diode D43B, the other of the different-name terminals is connected to the anode of the diode D43, the other of the secondary winding of the inductor 3641, the cathode of the capacitor C43B and the cathode of the capacitor C43B, and the cathode of the capacitor C43B is connected to the ground via the capacitor C31, and the anode of the diode D43B and the capacitor C43 is connected to the cathode of the capacitor C72, and the anode of the capacitor C B is connected to the capacitor C72, and the anode of the capacitor C72, and the capacitor C72 is connected to the capacitor C72, the anode of the capacitor C72, the capacitor C72 is connected to the capacitor C72, and the capacitor C72, the anode of the capacitor C72 is connected to the anode of the capacitor C B, and the capacitor C72 is connected to the anode of the anode.

6. A non-stroboscopic dimming driver with input valley compensation according to claim 1 or 3, characterized in that the rectifying module (2) comprises a rectifying circuit, the rectifying circuit is composed of four diodes DS11, DS12, DS13 and DS14, the anode of the diode DS13 and the anode of the diode DS14 are connected to ground, the cathode of the diode DS11 and the cathode of the diode DS12 are connected as output terminals, one of them is connected to one end of the resistor RS53A of the input voltage waveform detection circuit (401), the other is connected to the same name terminal of the inductor L41A of the dimming driving module (3), and the anode of the DS11 is connected to the cathode of the DS14 and is connected to the insurance module (1) as an input terminal.

7. The non-stroboscopic dimming driver with input valley compensation according to claim 6, wherein the filtering module (5) comprises a resistor RS21, a resistor RS23, a capacitor C21, a capacitor C22, a capacitor C23, a diode DS21, an inductor L and a thermistor VD21, one end of the inductor L is connected to one end of a resistor R23 through a capacitor C22, one end of the resistor R23 is further connected to the cathode of a diode DS21, the other end of the resistor R23 is connected to the anode of a diode DS21, the other end of the resistor R23 is connected to the anode of a diode DS14 of the rectifying module (2), the other end of the capacitor C23 is connected to the ground, the two ends of the capacitor C23 are connected to the resistor VD 23 in parallel, and the two ends of the inductor VD 23 are connected to the resistor VD 23 in parallel.

8. The strobeless dimming driver with input valley compensation according to claim 6, wherein the protection module (1) comprises a capacitor C11, a protection resistor R11, an EMI common mode inductor L11, an EMI common mode inductor L and a thermistor D11, wherein the synonym terminal of the primary winding of the EMI common mode inductor L011 is connected to the X11A interface of the input AC power, one end of the protection resistor R11 is connected to the X11B interface of the input AC power, the other end of the protection resistor R11 is connected to the synonym terminal of the secondary winding of the EMI common mode inductor L111, the synonym terminal of the primary winding of the EMI common mode inductor 5811 is connected to the synonym terminal of the primary winding of the EMI common mode inductor L12, the synonym terminal of the secondary winding of the EMI common mode inductor L is connected to the synonym terminal of the secondary winding of the EMI common mode inductor L, one end of the thermistor D11 is connected to the synonym terminal of the primary winding L, the synonym terminal of the secondary winding of the EMI common mode inductor D8624 is connected to the synonym terminal of the primary winding of the EMI common mode inductor DS 865, and the diode DS 8653 is connected to the common mode inductor DS11, and the common mode inductor D867.

9. The non-stroboscopic dimming driver with input valley compensation according to claim 1, 7 or 4, wherein the input current waveform detection circuit (6) comprises a resistor RS31A, a resistor RS31B, a resistor RS31C and a capacitor CS31, the power supply circuit (7) comprises a resistor RS62A, a resistor RS62B and a MOS transistor QS62, a drain of the MOS transistor QS62 is connected to one end of the resistor RS62A through a resistor RS62B, the other end of the resistor RS62A is connected to the same-name end of the primary winding of the inductor L C, the other end of the resistor RS62 is connected to one end of an inductor L21 in the filter module (5), a source of the MOS transistor QS62 is connected to a VCC pin of the single-stage dimming chip US31, one end of the resistor RS31A is connected to the VDCBUS end, the other end of the resistor RS31 is connected to one end of the RS C through a resistor RS31B, and the other end of the resistor RS62 is connected to one end of the MOS transistor CS 599 and the other end of the capacitor CS 595739.

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