CN117713324B - Multistage intelligent power management system - Google Patents
Multistage intelligent power management system Download PDFInfo
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- CN117713324B CN117713324B CN202410166717.7A CN202410166717A CN117713324B CN 117713324 B CN117713324 B CN 117713324B CN 202410166717 A CN202410166717 A CN 202410166717A CN 117713324 B CN117713324 B CN 117713324B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The application provides a multistage intelligent power supply management system which comprises a primary power supply conversion module, a secondary power supply conversion module, a primary power supply on-off control module and a secondary power supply on-off control module; the input end of the primary power supply conversion module is connected with a primary voltage source through the primary protection module, the output end of the primary power supply conversion module is connected with the secondary power supply conversion module, the primary power supply conversion module is configured to convert the primary voltage source into a secondary voltage source, and the secondary power supply conversion module is configured to convert the secondary voltage source into a power supply voltage source; the primary power supply on-off control module is connected with the primary protection module and is configured to control on-off of the primary voltage source, and the secondary power supply on-off control module is connected with the output end of the secondary power supply conversion module and is configured to control on-off of the secondary voltage source. The multistage intelligent power management system can realize intelligent on-off control of the primary power supply and the secondary power supply, greatly improves the reliability of a power supply system and ensures the safety of an electronic system.
Description
Technical Field
The application belongs to the technical field of integrated circuits, and particularly relates to a multistage intelligent power management system.
Background
With the rapid development of integrated electronic systems and chip miniaturization, the requirements on a power supply system are increasing, in the electronic system, a power supply module is a critical ring, and the normal operation of all loads in the system needs continuous and stable power supply. It can be said that a stable, reliable and efficient power supply system makes an irreplaceable contribution to the rapid development of the respective high-precision electronic system field.
However, current power supply systems tend to address specific power requirements, such as 5V,3.3V,2.5V,1.8V, or 1.0V power supplies commonly used on integrated circuit boards; in addition, the function is single, and in addition, a primary power supply such as 45V or 28V input is always required to be externally connected with a primary power supply module, so that the cost is increased, the integration level is low, and for products requiring high integration, the load power supply is inconvenient in practical application. Moreover, due to the higher and higher integration degree of the electronic system at present, the cost of a single system is higher, and particularly in the aerospace field, the value of the system is difficult to measure by price.
Therefore, the safety of the power supply system must be reliably ensured, but the current common power supply system has no more safety measures except the conventional short-circuit protection during one power supply conversion process, which makes the safety of the electronic system unreliable.
Disclosure of Invention
In view of the foregoing, the present application is directed to a multi-stage intelligent power management system, which solves at least one of the above-mentioned problems.
In order to achieve the above purpose, the technical scheme of the application is realized as follows:
The application provides a multistage intelligent power supply management system which comprises a primary power supply conversion module, a secondary power supply conversion module, a primary power supply on-off control module and a secondary power supply on-off control module;
The input end of the primary power supply conversion module is connected with a primary voltage source through a primary protection module, the output end of the primary power supply conversion module is connected with the secondary power supply conversion module, the primary power supply conversion module is configured to convert the primary voltage source into a secondary voltage source, and the secondary power supply conversion module is configured to convert the secondary voltage source into a power supply voltage source;
The primary power supply on-off control module is connected with the primary protection module and is configured to control on-off of a primary voltage source, and the secondary power supply on-off control module is connected with the output end of the secondary power supply conversion module and is configured to control on-off of a secondary voltage source.
Further, the primary protection module comprises a short-circuit protection circuit and a surge suppression circuit which are connected;
the short-circuit protection circuit comprises two fuses connected in parallel, and one end of each fuse is connected with a primary voltage source;
The surge suppression circuit comprises a first switching tube and a second switching tube, wherein the first end of the first switching tube is connected with the first end of the second switching tube and is connected with the other end of the fuse.
Further, the primary power on-off control module comprises a first switch relay, wherein a A, B pin of the first switch relay is connected with a primary voltage source;
The pins A1 and B1 of the first switching relay are connected with the first terminals of the first switching tube and the second switching tube through a resistor divider circuit;
The first switching relay is configured to control the on/off of the primary voltage source and the ground return line of the surge suppression circuit to control the on/off of the primary voltage source.
Further, the primary power conversion module comprises a primary conversion unit, the input end of the primary conversion unit is connected with the first switch tube and the second end of the second switch tube through a first inductor and a first resistor which are connected in parallel, the output end of the primary conversion unit is connected with a first voltage stabilizing circuit, and the first voltage stabilizing circuit outputs a secondary voltage source through a second inductor.
Further, a secondary protection module is also connected on the line between the primary power conversion module and the secondary power conversion module;
the secondary protection module comprises a power supply high-side protection controller and a third switch tube, wherein a first pin of the power supply high-side protection controller is connected with a second end of the third switch tube through a thirty-fourth resistor, a second end of the third switch tube is connected with the second inductor, a ninth pin of the power supply high-side protection controller is connected with a first end of the third switch tube, and the first end of the third switch tube is further connected with a first voltage telemetry circuit.
Further, the secondary power on-off control module comprises a second switch relay, wherein a A, B pin of the second switch relay is connected with an eighth pin of the power high-side protection controller through a sixth resistor and a fifth resistor;
The pins A1 and B1 of the second switching relay are connected with a fifth pin of the power supply high-side protection controller through a resistor divider circuit;
the second switching relay is configured to control the on/off of EN signal and EN1 signal of the power high-side protection controller to control the on/off of the secondary voltage source.
Further, the secondary power supply conversion module comprises a primary secondary power supply conversion circuit and a secondary power supply conversion circuit;
The first pin of the first secondary conversion unit is connected with the first end of the third switch tube through a thirty-third resistor, a fifty-seventh capacitor and a forty-ninth capacitor, the second pin of the first secondary conversion unit is connected with a second voltage stabilizing circuit through a forty-resistor, a first secondary voltage source is output through the second voltage stabilizing circuit, and the second voltage stabilizing circuit is also connected with a second voltage telemetry circuit;
The secondary power supply conversion circuit comprises a power supply management unit, wherein the input end of the power supply management unit is input with a primary secondary voltage source, the power supply management unit is configured to be output in multiple channels, and a plurality of secondary voltage sources with different voltage levels are output as power supply voltage sources by configuring an output configuration resistor of each channel.
Further, the RUN1 pin of the power management unit is grounded through a pull-up resistor, and the RUN2 pin, the RUN3 pin and the RUN4 pin of the power management unit are respectively connected with the PGOOD pin of the power management unit through corresponding pull-up resistors so as to control the power-on time sequence.
Further, the secondary power conversion module further comprises a second secondary power conversion circuit, the second secondary power conversion circuit comprises a second secondary conversion unit, a second pin of the second secondary conversion unit is connected with the first end of the third switching tube, and an output end of the second secondary conversion unit outputs a secondary voltage source through the third voltage stabilizing circuit to serve as a power supply voltage source.
Further, the secondary protection module is also connected with an EMI filtering module, the EMI filtering module comprises an EMI filter, an input pin of the EMI filter is connected with a first end of the third switch tube, a first filtering voltage stabilizing circuit is arranged on a connecting line, and an output pin of the EMI filter is provided with a second filtering voltage stabilizing circuit.
Compared with the prior art, the multistage intelligent power supply management system has the following beneficial effects:
The multistage intelligent power management system integrates the primary power supply and the secondary power supply in the same power supply system, realizes high integration of various voltage sources, can meet the load use requirements of different power supply requirements, greatly reduces the design cost, and is more in line with increasingly integrated and miniaturized electronic products; and the intelligent on-off control of the primary power supply and the secondary power supply can be respectively realized, the reliability of the power supply system is greatly improved, and the safety of the electronic system is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a block diagram of a multi-stage intelligent power management system according to an embodiment of the present application;
FIG. 2 is a circuit diagram of a primary protection module according to an embodiment of the present application;
FIG. 3 is a circuit diagram of a primary power on-off control module according to an embodiment of the present application;
FIG. 4 is a circuit diagram of a primary power conversion module according to an embodiment of the present application;
FIG. 5 is a circuit diagram of a secondary protection module according to an embodiment of the application;
FIG. 6 is a circuit diagram of a secondary power on-off control module according to an embodiment of the present application;
FIG. 7 is a circuit diagram of a primary-secondary power conversion module according to an embodiment of the present application;
FIG. 8 is a circuit diagram of a secondary power conversion module according to an embodiment of the present application;
FIG. 9 is a circuit diagram of a second secondary power conversion circuit according to an embodiment of the present application;
fig. 10 is a circuit diagram of an EMI filter module according to an embodiment of the application.
Detailed Description
The present application will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used in embodiments of the present application, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The embodiment provides a multistage intelligent power supply management system, which comprises a primary power supply conversion module, a secondary power supply conversion module, a primary power supply on-off control module and a secondary power supply on-off control module;
The input end of the primary power supply conversion module is connected with a primary voltage source through the primary protection module, the output end of the primary power supply conversion module is connected with the secondary power supply conversion module, the primary power supply conversion module is configured to convert the primary voltage source into a secondary voltage source, and the secondary power supply conversion module is configured to convert the secondary voltage source into a power supply voltage source;
The primary power supply on-off control module is connected with the primary protection module and is configured to control on-off of the primary voltage source, and the secondary power supply on-off control module is connected with the output end of the secondary power supply conversion module and is configured to control on-off of the secondary voltage source.
Specifically, in this embodiment, as shown in fig. 1, a primary power supply 45-63 v is input through a power connector, and then through a short-circuit protection circuit and a surge suppression circuit, primary power supply on-off control is added at the position of the surge suppression circuit, and the on-off of a loop can be effectively controlled by connecting a ground loop of the surge suppression circuit with a ground loop of the primary power supply through a switching relay; then a module for converting a primary power supply 45V into a secondary power supply 28V is arranged, a corresponding on-off control circuit is arranged for 28V output, and an EMI filtering module is added at the rear end, so that the integral EMI is ensured not to interfere with a rear end load circuit; the power supply circuits are switched from 28V to 5V and 28V to-5V, and finally the power supply circuits are switched from 5V to 3.3V,2.5V,1.8V and 1.0V.
The multistage intelligent power management system integrates a primary power supply (45-63V power supply) and a secondary power supply (28V, +/-5V, 3.3V,2.5V,1.8V and 1.0V) in the same power supply system, realizes high integration of various voltage sources, can meet the load use requirements of different kinds of power supply requirements, greatly reduces the design cost, and is more in line with increasingly integrated and miniaturized electronic product routes; and the intelligent on-off control of the primary power supply and the secondary power supply can be respectively realized, the reliability of the power supply system is greatly improved, and the safety of the electronic system is ensured.
In some embodiments, the primary protection module includes a short circuit protection circuit and a surge suppression circuit connected;
the short-circuit protection circuit comprises two fuses connected in parallel, and one end of each fuse is connected with a primary voltage source;
The surge suppression circuit comprises a first switching tube Q1 and a second switching tube Q2, wherein a first terminal S of the first switching tube Q1 is connected with a first terminal S of the second switching tube Q2 and is connected with the other end of the fuse.
Specifically, in the embodiment, a primary voltage source is input at 45-63V, and two fuses F4 and F5 with the same model are connected in parallel, so that the capacity expansion of the fuse is realized, and the reliability of a power distribution channel is ensured; the fuse is of a Western-melt semiconductor type RSG-FFA-125V10A, and the fuse with the specification of 125V is adopted, so that the service life of components can be effectively prolonged according to the design of 0.5 derating, and the reliability is ensured.
Because the capacitor is equivalent to short circuit to transient voltage, if the surge suppression circuit is not arranged in the circuit, a large current can be generated at the moment of switching on the switch, and certain influence can be caused on the fuse circuit and the bus. In this embodiment, the surge suppression circuit is shown as a gate control circuit of two MOS transistors Q1 and Q2 and a MOS transistor gate (G) in fig. 2, and the principle is that the MOS is turned off when the VGS voltage is smaller than the threshold value by using the correlation between the MOS transistor current and the voltage difference VGS between the gate (G) and the source (S); when VGS gradually increases, the MOS gradually opens and the current through the MOS also gradually increases.
When the primary voltage source starts to be electrified, capacitors C12 and C13 (2.2 uF/100V) are approximately short-circuited, so that the G pole voltages of Q1 and Q2 are equal to the S pole voltage, and thus VGS voltage difference is 0, MOS is closed, and a loop is not opened; along with the capacitor is charged gradually, the capacitor is full of electric quantity, current circulates through the resistor branch, the voltage of the G electrode is gradually reduced due to the voltage division effect of the resistor, the voltage difference VGS of the G electrode and the S electrode is gradually increased, the MOS is gradually opened, the current is gradually increased, and the surge current is effectively restrained.
The MOS tube is IRF5210S in type, the resistances of the resistors R7 and R8 are 47K, the resistances of the resistors R14 and R15 are 100K, when the primary power supply supplies power normally, the gate-source voltage difference of the MOS tube is larger than 30V through the resistor voltage dividing circuit, and the MOS is completely opened, so that the normal work of the loop is not affected.
In some embodiments, the primary power on-off control module comprises a first switching relay, and a A, B pin of the first switching relay is connected with the primary voltage source;
Pins A1 and B1 of the first switching relay are connected with first terminals of the first switching tube and the second switching tube through a resistor divider circuit;
The first switching relay is configured to control the on/off of the primary voltage source and the ground return line of the surge suppression circuit to control the on/off of the primary voltage source.
Specifically, in this embodiment, as shown in fig. 3, which is a schematic diagram of a control module for controlling on/off of the primary power supply, a switching relay (model number 2JB 1-910/V12-1) is used to control whether a primary power supply ground loop (45 VGND) and a ground loop (45vgnd_g) of the surge suppression circuit are turned on, so as to control on/off of the primary power supply.
In the figure, a starting command VIN_ON and a closing command VIN_OFF are shown, when VIN_ON is effective, the relay is conducted, two ground loops are communicated, and the passage is conducted; when VIN_OFF is effective, the relay is turned OFF, the two ground loops are disconnected, and the path is turned OFF.
The startup instruction and the shutdown instruction are controlled by an external program, so that the purposes of safety and convenience are realized.
In some embodiments, the primary power conversion module includes a primary conversion unit, an input end of the primary conversion unit is connected with second ends of the first switching tube and the second switching tube through a first inductor and a first resistor which are connected in parallel, an output end of the primary conversion unit is connected with a first voltage stabilizing circuit, and the first voltage stabilizing circuit outputs the secondary voltage source through a second inductor.
Specifically, in this embodiment, as shown in fig. 4, the main body scheme of the primary power conversion module adopts a high-power DC/DC converter, the model is DCM362375H31C2T200, the maximum power output of 320W can be supported, a 2.2uH inductor L1 is added on the 45V primary power input path, possible high-frequency noise interference is filtered, and a plurality of capacitors with different capacitance values are added in series at the power input end and the power output end, so that the stability of the input and output voltages is ensured.
Wherein, C1, C2, C55, C66 are 22uF, and the withstand voltage value is 100V capacitance; capacitance of 0.01uF for C8, C9, C10, C11, C36 and C37 and 100V withstand voltage; c4, C5, C14, C17, C18, C31, C32, C33, C62 are 100uF, and the withstand voltage is 35V.
In some embodiments, a secondary protection module is further connected to the line between the primary power conversion module and the secondary power conversion module;
The secondary protection module comprises a power supply high-side protection controller and a third switching tube, a first pin of the power supply high-side protection controller is connected with a second end of the third switching tube through a thirty-fourth resistor, a second end of the third switching tube is connected with a second inductor, a ninth pin of the power supply high-side protection controller is connected with a first end of the third switching tube, and the first end of the third switching tube is further connected with a first voltage telemetry circuit.
Specifically, in this embodiment, as shown in fig. 5, the main body scheme of the secondary protection module adopts a power supply high-side protection controller (model LM 5060) and an NMOS tube (model IPT020N10N 3),
Through controlling EN pin, control chip whether begins to work, and then control the secondary power supply passageway and switch on, concrete control logic is as follows:
Through a resistor voltage dividing circuit, R35, R36 and R37 control the voltage of a UVLO pin of the chip, and the undervoltage protection function of the chip is released only when the voltage of the pin is larger than 1.6V (namely, only when VIN is larger than 8V) to perform the next action, so that the undervoltage protection is realized;
The chip starts to charge the internal charge pump, so that the Gate voltage of the pin of the chip 10 is gradually raised, and when the voltage rises to exceed the threshold voltage of the NMOS tube, the NMOS tube starts to be conducted; meanwhile, an overvoltage protection circuit is arranged through resistor voltage division of R35, R36 and R37, when the voltage of a 3 pin OVP (Over Voltage protection) of the chip is more than 2V, the overvoltage protection of the chip is triggered, the chip pulls down the Gate pin voltage, so that the NMOS is closed, and the overvoltage protection is realized.
Meanwhile, the voltage division value of the output voltage can be obtained at any time through a remote measuring circuit of R42 (20K), R44 (18K), R43 (8.2K) and R45 (8.2K) at the voltage output end of the NMOS tube, the output voltage is monitored, and when the output voltage is abnormal, the output voltage can be immediately turned off through the on-off control circuit; according to the resistor divider circuit, when the theoretical output voltage is 28V, the theoretical voltage value of the telemetry circuit is 2.73V.
In some embodiments, the secondary power on-off control module comprises a second switching relay, wherein a A, B pin of the second switching relay is connected with an eighth pin of the power high-side protection controller through a sixth resistor and a fifth resistor;
pins A1 and B1 of the second switching relay are connected with a fifth pin of the power supply high-side protection controller through a resistor voltage dividing circuit;
the second switching relay is configured to control the on/off of EN signal and EN1 signal of the power high-side protection controller to control the on/off of the secondary voltage source.
Specifically, in this embodiment, as shown in fig. 6, a switching relay is used to control whether an EN1 signal and an EN2 signal of a high-side protection controller (model LM 5060) are turned ON or not, so as to realize the ON and OFF of the secondary power supply, and the ON command vout_on and the OFF command vout_off of the switching relay are controlled by external programs.
When the startup command is effective, EN1 and EN are communicated, the front-end resistor R6 of EN1 is 100K, the rear-end resistor R4 of EN is 18K, the voltage of EN pin at LM5060 is 4.3V according to the resistor voltage division, LM5060 starts to work, and the channel is conducted.
When the off command is invalid, EN1 and EN are disconnected, EN pin voltage is 0, LM5060 cannot work, and the access is shut down.
In some embodiments, the secondary power conversion module includes a primary secondary power conversion circuit, a secondary power conversion circuit;
The first pin of the first secondary conversion unit is connected with a first end of the third switch tube through a thirty-third resistor, a fifty-seventh capacitor and a forty-ninth capacitor, the second pin of the first secondary conversion unit is connected with a second voltage stabilizing circuit through a forty-resistor, a first secondary voltage source is output through the second voltage stabilizing circuit, and the second voltage stabilizing circuit is also connected with a second voltage telemetry circuit;
The secondary power supply conversion circuit comprises a power supply management unit, wherein the input end of the power supply management unit is input with a primary secondary voltage source, the power supply management unit is configured to be output in multiple channels, and a plurality of secondary voltage sources with different voltage levels are output as power supply voltage sources by configuring an output configuration resistor of each channel;
the RUN1 pin of the power management unit is grounded through a pull-up resistor, and the RUN2 pin, the RUN3 pin and the RUN4 pin of the power management unit are respectively connected with the PGOOD pin of the power management unit through corresponding pull-up resistors so as to control the power-on time sequence.
Specifically, in this embodiment, since the 5V power supply belongs to a power supply that is frequently applied in the conventional circuit design and has a relatively large corresponding load requirement, in the primary-secondary power supply conversion circuit, as shown in fig. 7, a DC/DC converter with output power up to 30W is selected, and the model is WK 302805S-30.
In addition, a second voltage telemetry circuit is arranged at the 5V voltage output end, the reliability is improved in a resistor series-parallel connection mode, and even if one resistor is short-circuited, the whole monitoring circuit can still work; as shown by R46, R47, R48 and R49; r46=560 Ω, r47=4.3k, r48=r49=8.2k; when the output voltage is 5V, the telemetry theoretical value is 2.3V;
As shown in fig. 8, the main scheme of the secondary power conversion circuit adopts a power management chip LTM4644, which supports 5V voltage input and four-channel output. By configuring the output configuration resistor of each channel, different power supply voltages are output, 1V0 voltage is output, the configuration resistor selects 90.9KΩ, 2.5V voltage is output, the configuration resistor selects 19.1KΩ, 1.8V voltage is output, the configuration resistor selects 30.1KΩ, 3.3V voltage is output, and the configuration resistor selects 13.3KΩ.
In addition, each channel can be pulled up or pulled down through RUN pins (such as RUN1, RUN2, RUN3 and RUN 4) corresponding to the chip to control the opening and closing of the channels, so that the opening sequence of each channel can be controlled, and the requirement of a back-end load on the front-end voltage power-on time sequence is met.
In this embodiment, the sequence of the power-on sequence is 1V0, 1V8, 3V3 and 2V5, after each path of voltage is normally output, the corresponding PGOOD pin outputs a high level, and the power-on sequence can be controlled by connecting the pin signal as a power-on control signal (e.g., EN1V0, EN1V8, EN3V3 in fig. 8) to the RUN pin of the corresponding channel through the pull-up resistor.
In some embodiments, the secondary power conversion module further includes a second secondary power conversion circuit, the second secondary power conversion circuit includes a second secondary conversion unit, a second pin of the second secondary conversion unit is connected to the first end of the third switching tube, and an output end of the second secondary conversion unit outputs a secondary voltage source through the third voltage stabilizing circuit to serve as a power supply voltage source.
Specifically, for a part of loads requiring negative power supply, as shown in fig. 9, in the overall scheme of the embodiment, a-5V power supply conversion circuit is provided, a power supply conversion chip selects a DC/DC converter with output power of 6W, the model is WK402805S-5HM, in particular, at the-5V power supply output end, the positive end of the chip voltage is grounded, and the negative end of the chip voltage is connected with-5V for output, so that the voltage obtained by the load is-5V.
Corresponding capacitors are added at the voltage input end and the voltage output end of the DC/DC converter, so that the stability of input voltage and output voltage is ensured, C45=0.01 uF, C46=C47=10uF and C16=0.1 uF.
In some embodiments, the secondary protection module is further connected to an EMI filter module, the EMI filter module includes an EMI filter, an input pin of the EMI filter is connected to the first end of the third switch tube, a first filtering voltage stabilizing circuit is disposed on the connecting line, and an output pin of the EMI filter is provided with a second filtering voltage stabilizing circuit.
Specifically, in this embodiment, as shown in fig. 10, the main body scheme of the EMI filter module adopts an EMI filter, and the model number is MQPI-18, because the noise of the power module is large, and the noise of the frequency range is often between tens of K and 1G, for an electronic system with strict EMI requirements, the problem of EMI overstandard is often generated, so that in the 28V post-stage power path, the probability of occurrence of EMI problems can be greatly reduced by connecting EMI FILTER in series.
3 Filtering voltage stabilizing capacitors are arranged on the 28V input pin, the models are C1=2.2 uF, C2=1 uF and C3=0.47 uF, and the small capacitors are placed close to the chip pin, so that a better voltage stabilizing effect can be achieved; four filter voltage stabilizing capacitors are adopted for the 28V output pins, and the types are C4=0.47uF, C5=1uF, C6=2.2uF and C7=2.2uF; pins 2 and 3 of the chip are the housing ground, and the negative terminal of the output voltage is connected through a capacitor c63=2.2 uF.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, and the like, which are within the spirit and principles of the embodiments of the application, are intended to be included within the scope of the application.
Claims (5)
1. A multistage intelligent power management system is characterized in that:
the device comprises a primary power supply conversion module, a secondary power supply conversion module, a primary power supply on-off control module and a secondary power supply on-off control module;
The input end of the primary power supply conversion module is connected with a primary voltage source through a primary protection module, the output end of the primary power supply conversion module is connected with the secondary power supply conversion module, the primary power supply conversion module is configured to convert the primary voltage source into a secondary voltage source, and the secondary power supply conversion module is configured to convert the secondary voltage source into a power supply voltage source;
The primary power supply on-off control module is connected with the primary protection module and is configured to control on-off of a primary voltage source, and the secondary power supply on-off control module is connected with the output end of the secondary power supply conversion module and is configured to control on-off of a secondary voltage source;
The primary protection module comprises a short-circuit protection circuit and a surge suppression circuit which are connected;
the short-circuit protection circuit comprises two fuses connected in parallel, and one end of each fuse is connected with a primary voltage source;
the surge suppression circuit comprises a first switching tube and a second switching tube, wherein the first end of the first switching tube is connected with the first end of the second switching tube and is connected with the other end of the fuse;
The primary power on-off control module comprises a first switch relay, wherein a A, B pin of the first switch relay is connected with a primary voltage source;
The pins A1 and B1 of the first switching relay are connected with the first terminals of the first switching tube and the second switching tube through a resistor divider circuit;
the first switching relay is configured to control the primary voltage source and the ground loop of the surge suppression circuit to be turned on and off so as to control the primary voltage source to be turned on and off;
the primary power supply conversion module comprises a primary conversion unit, wherein the input end of the primary conversion unit is connected with the second ends of the first switching tube and the second switching tube through a first inductor and a first resistor which are connected in parallel, the output end of the primary conversion unit is connected with a first voltage stabilizing circuit, and the first voltage stabilizing circuit outputs a secondary voltage source through a second inductor;
A secondary protection module is also connected on a line between the primary power conversion module and the secondary power conversion module;
The secondary protection module comprises a power supply high-side protection controller and a third switch tube, a first pin of the power supply high-side protection controller is connected with a second end of the third switch tube through a thirty-fourth resistor, a second end of the third switch tube is connected with the second inductor, a ninth pin of the power supply high-side protection controller is connected with a first end of the third switch tube, and the first end of the third switch tube is also connected with a first voltage telemetry circuit;
The secondary power on-off control module comprises a second switching relay, wherein a A, B pin of the second switching relay is connected with an eighth pin of the power high-side protection controller through a sixth resistor and a fifth resistor;
The pins A1 and B1 of the second switching relay are connected with a fifth pin of the power supply high-side protection controller through a resistor divider circuit;
the second switching relay is configured to control the on/off of EN signal and EN1 signal of the power high-side protection controller to control the on/off of the secondary voltage source.
2. The multi-stage intelligent power management system of claim 1, wherein:
the secondary power supply conversion module comprises a primary secondary power supply conversion circuit and a secondary power supply conversion circuit;
The first pin of the first secondary conversion unit is connected with the first end of the third switch tube through a thirty-third resistor, a fifty-seventh capacitor and a forty-ninth capacitor, the second pin of the first secondary conversion unit is connected with a second voltage stabilizing circuit through a forty-resistor, a first secondary voltage source is output through the second voltage stabilizing circuit, and the second voltage stabilizing circuit is also connected with a second voltage telemetry circuit;
The secondary power supply conversion circuit comprises a power supply management unit, wherein the input end of the power supply management unit is input with a primary secondary voltage source, the power supply management unit is configured to be output in multiple channels, and a plurality of secondary voltage sources with different voltage levels are output as power supply voltage sources by configuring an output configuration resistor of each channel.
3. The multi-stage intelligent power management system of claim 2, wherein:
The RUN1 pin of the power management unit is grounded through a pull-up resistor, and the RUN2 pin, the RUN3 pin and the RUN4 pin of the power management unit are respectively connected with the PGOOD pin of the power management unit through corresponding pull-up resistors so as to control the power-on time sequence.
4. A multi-stage intelligent power management system as claimed in claim 3, wherein:
the secondary power conversion module further comprises a second secondary power conversion circuit, the second secondary power conversion circuit comprises a second secondary conversion unit, a second pin of the second secondary conversion unit is connected with the first end of the third switching tube, and the output end of the second secondary conversion unit outputs a secondary voltage source through the third voltage stabilizing circuit to serve as a power supply voltage source.
5. The multi-stage intelligent power management system of claim 1, wherein:
The secondary protection module is also connected with an EMI filter module, the EMI filter module comprises an EMI filter, an input pin of the EMI filter is connected with a first end of the third switch tube, a first filtering voltage stabilizing circuit is arranged on a connecting line, and an output pin of the EMI filter is provided with a second filtering voltage stabilizing circuit.
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| CN202410166717.7A CN117713324B (en) | 2024-02-06 | 2024-02-06 | Multistage intelligent power management system |
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| CN117713324B true CN117713324B (en) | 2024-05-28 |
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| KR101025974B1 (en) * | 2009-10-30 | 2011-03-30 | 삼성전기주식회사 | Power supply with multistep |
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| CN102545568A (en) * | 2012-01-09 | 2012-07-04 | 华为终端有限公司 | Terminal power supply circuit and multi-mode data card |
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| CN117713324A (en) | 2024-03-15 |
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