CN218733409U - Intelligent chip power supply circuit - Google Patents
Intelligent chip power supply circuit Download PDFInfo
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- CN218733409U CN218733409U CN202222992626.8U CN202222992626U CN218733409U CN 218733409 U CN218733409 U CN 218733409U CN 202222992626 U CN202222992626 U CN 202222992626U CN 218733409 U CN218733409 U CN 218733409U
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Abstract
The utility model discloses an intelligent power supply circuit of a chip, which relates to the technical field of power control, and comprises a power module and an auxiliary power module, wherein the power module is respectively used for main power supply and auxiliary power supply; the output sampling module is used for sampling the voltage of the power supply module; the electric energy fluctuation control module is used for judging the electric energy fluctuation condition through the subtraction control circuit and providing an electric energy switching signal for the intelligent control module through the capacitance control circuit, and the intelligent control module is used for receiving the signal and controlling the module to work; the switching self-locking module is used for controlling self-locking switching of electric energy; and the timing reset module is used for self-locking reset. The utility model discloses chip intelligence power supply circuit carries out subtraction processing through subtraction control circuit with the signal of sampling and the reference threshold value of settlement, judges the undulant condition of electric energy to control switching at certain within range carries out the electric energy auto-lock and switches over from the locking module, when the power does not have undulant, control power reset control.
Description
Technical Field
The utility model relates to a power control technology field specifically is a chip intelligence supply circuit.
Background
Along with the development of modernization technique, power supply circuit wide application is in electronic equipment, in order to ensure electronic equipment's steady permanent work, and present electronic equipment adopts little control chip to carry out intelligent control mostly, its power supply circuit then adopts flyback switching power supply circuit's mode to carry out the steady voltage supply, and adopt UPS power supply circuit to carry out incessant electric energy supply, but the switching power supply of UPS power most all detects through little control chip and swashs behind the unable normal power supply of flyback switching power supply circuit, the power switching control that just realizes, can't carry out power protection control to the chip in advance, lead to little control chip's procedure error easily, there is the risk of outage, can't satisfy little control chip's power supply demand, urgent need reform transform prior art.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a chip intelligence supply circuit to solve the problem that proposes in the above-mentioned background art.
The embodiment of the utility model provides an in, a chip intelligence supply circuit is provided, this chip intelligence supply circuit includes: the device comprises a power supply module, an auxiliary power supply module, an output sampling module, an electric energy fluctuation control module, an intelligent control module, a switching self-locking module and a timing reset module;
the power supply module is used for providing main electric energy required by the circuit;
the auxiliary power supply module is used for providing auxiliary electric energy required by the circuit;
the output sampling module is connected with the power supply module and the intelligent control module and is used for sampling the voltage of the main electric energy output by the power supply module and outputting a voltage signal;
the electric energy fluctuation control module, the output sampling module and the intelligent control module are used for carrying out subtraction processing on the voltage signal and a set reference threshold value through a subtraction control circuit and outputting a first control signal and a second control signal, and the electric energy fluctuation control module is used for triggering the capacitance control circuit to output an electric energy switching signal and a third control signal at regular time through the first control signal and the second control signal;
the intelligent control module is used for receiving the voltage signal and the electric energy switching signal and outputting an electric energy control signal;
the switching self-locking module is connected with the power supply module, the auxiliary power supply module and the intelligent control module, is used for receiving the electric energy control signal and controlling the self-locking work of electric energy switching electric energy through a self-locking circuit, and is used for controlling the switching work of the auxiliary power supply module and the power supply module through the electric energy switching circuit and providing required electric energy for the intelligent control module;
the timing reset module is connected with the electric energy fluctuation control module and the switching self-locking module, is used for controlling the work of the timing control circuit through a third control signal, and is used for outputting a high-level signal at fixed time through the timing control circuit and controlling the switching self-locking module to perform self-locking reset.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses chip intelligence power supply circuit carries out main power supply by power module, carry out vice power supply by vice power module, carry out the electric energy sampling by output sampling module to power module, carry out subtraction processing with the signal of sampling and the reference threshold value of settlement through electric energy fluctuation control module, and control electric capacity control circuit in certain within range regularly for intelligent control module provides the electric energy switching signal, judge the undulant condition of power, under the great condition of power fluctuation, by intelligent control module output electric energy control signal, and carry out signal self-locking control and carry out the switching control of power module and vice power module through switching self-locking module, and under the power condition of not having the fluctuation, control timing reset module carries out reset control to switching self-locking module, realize power module's self-resuming power supply, avoid power fluctuation to lead to the program error, and carry out outage protection control in advance, the security of improvement circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of an example of the present invention.
Fig. 2 is a circuit diagram of an example of the present invention provides a chip intelligent power supply circuit.
Fig. 3 is a circuit diagram of the timing reset module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In embodiment 1, referring to fig. 1, an intelligent power supply circuit for a chip includes: the device comprises a power module 1, an auxiliary power module 2, an output sampling module 3, an electric energy fluctuation control module 4, an intelligent control module 5, a switching self-locking module 6 and a timing resetting module 7;
specifically, the power module 1 is used for providing main power required by a circuit;
the auxiliary power supply module 2 is used for providing auxiliary electric energy required by the circuit;
the output sampling module 3 is connected with the power module 1 and the intelligent control module 5 and is used for sampling the voltage of the main electric energy output by the power module 1 and outputting a voltage signal;
the electric energy fluctuation control module 4 is used for carrying out subtraction processing on the voltage signal and a set reference threshold value through a subtraction control circuit and outputting a first control signal and a second control signal, and is used for triggering the capacitance control circuit to output an electric energy switching signal and a third control signal at regular time through the first control signal and the second control signal;
the intelligent control module 5 is used for receiving the voltage signal and the electric energy switching signal and outputting an electric energy control signal;
the switching self-locking module 6 is connected with the power module 1, the auxiliary power module 2 and the intelligent control module 5, is used for receiving the electric energy control signal and controlling the self-locking work of electric energy switching through a self-locking circuit, and is used for controlling the switching work of the auxiliary power module 2 and the power module 1 through the electric energy switching circuit and providing required electric energy for the intelligent control module 5;
and the timing reset module 7 is connected with the electric energy fluctuation control module 4 and the switching self-locking module 6, is used for controlling the timing control circuit to work through a third control signal, and is used for outputting a high-level signal at regular time through the timing control circuit and controlling the switching self-locking module to perform self-locking reset.
In a specific embodiment, the power module 1 may provide a required dc voltage for the circuit by using a switching power circuit, which is not described herein; the secondary power supply module 2 can adopt a rechargeable battery circuit as a secondary power supply, and a voltage regulation circuit provides required direct current voltage regulation for the circuit, which is not described herein; the output sampling module 3 can adopt a resistance voltage division circuit to sample voltage; the electric energy fluctuation control module 4 can adopt a subtraction control circuit and a capacitance control circuit, the subtraction control circuit performs subtraction operation to judge the voltage fluctuation condition, the capacitance control circuit performs electric energy storage, and a signal is transmitted to the intelligent control module 5 after a certain value is reached; the intelligent control module 5 can adopt, but is not limited to a single chip microcomputer, a DSCP and other control chips, integrates a plurality of components such as an arithmetic unit, a controller, a memory, an input/output device and the like, and realizes functions such as signal processing, data storage, module control and the like; the switching self-locking module 6 can adopt a self-locking circuit to control an electric energy and electric energy switching circuit, and the self-locking control circuit controls the self-locking and electric energy switching of the electric energy switching circuit; the timing reset module 7 can adopt a timing control circuit to control self-locking reset.
specifically, a first end of the first resistor R1 is connected to the power module 1, and a second end of the first resistor R1 is connected to the electric energy fluctuation control module 4 and a second IO end of the first control chip U1 and is connected to the ground end through the second resistor R2.
In a specific embodiment, the first resistor R1 and the second resistor R2 form a resistor voltage divider circuit for voltage sampling; the first control chip U1 may be a single chip microcomputer, and the type of the single chip microcomputer includes but is not limited to ST89C52 single chip microcomputer.
Further, the electric energy fluctuation control module 4 includes a third resistor R3, a reference threshold, a fourth resistor R4, a first operational amplifier OP1, a fifth resistor R5, a sixth resistor R6, a first power source VCC1, a first switching tube VT1, and a second switching tube VT2;
specifically, one end of the third resistor R3 is connected to the second end of the first resistor R1, the other end of the third resistor R3 is connected to the in-phase end of the first operational amplifier OP1, the inverting end of the first motion is connected to the reference threshold and is connected to the ground through the fourth resistor R4, the output end of the first operational amplifier OP1 is connected to one end of the fifth resistor R5 and one end of the sixth resistor R6, the other end of the fifth resistor R5 and the other end of the sixth resistor R6 are respectively connected to the base of the first switching tube VT1 and the base of the second switching tube VT2, the collector of the first switching tube VT1 and the emitter of the second switching tube VT2 are both connected to the first power source VCC1, and the emitter of the first switching tube VT1 is connected to the collector of the second switching tube VT 2.
In a specific embodiment, the first operational amplifier OP1 may be used by a subtraction circuit formed by an OP07 operational amplifier; the first switching tube VT1 can be an NPN-type triode, the second switching tube VT2 can be a PNP-type triode, and the positive voltage and the negative voltage output by the first operational amplifier OP1 are controlled when reaching a certain value and serve as voltage fluctuation bases.
Further, the electric energy fluctuation control module 4 further includes a first capacitor C1, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a third switching transistor VT3, a tenth resistor R10, a fourth switching transistor VT4, and a second power source VCC2;
specifically, the first end of the first capacitor C1 is connected to one end of a tenth resistor R10, one end of an eighth resistor R8 and the collector of the second switching tube VT2, the second end of the first capacitor C1 and the other end of the eighth resistor R8 are both equal and definite, the other end of the seventh resistor R7 is connected to the base of the third switching tube VT3, the collector of the third switching tube VT3 is connected to the first power VCC1, the emitter of the third switching tube VT3 is connected to the first IO end of the first control chip U1 and is grounded through a ninth resistor R9, the other end of the tenth resistor R10 is connected to the base of the fourth switching tube VT4, the emitter of the fourth switching tube VT4 is connected to the second power VCC2, and the collector of the fourth switching tube VT4 is connected to the timing reset module 7.
In a specific embodiment, the first capacitor C1 may adopt an energy storage capacitor to determine a fluctuation condition of electric energy; the third switching tube VT3 may be an NPN-type triode, and is turned on after the electric energy stored in the first capacitor C1 reaches a threshold value, so as to provide a power switching basis for the first control chip U1; the fourth switching tube VT4 may be a PNP type triode, and is turned on when the electric energy of the first capacitor C1 is low, so as to control the operation of the timing reset module 7.
Further, the timing reset module 7 includes a second capacitor C2, a fourth diode D4, a nineteenth resistor R19, a third capacitor C3, and a first timer U2;
specifically, the one end of second electric capacity C2, the fourth end and the eighth end of first timer U2 are all connected fourth switch tube VT 4's collecting electrode, and fourth diode D4's negative pole, first timer U2's sixth end and second end are connected and are connected the ground end through nineteenth resistance R19 to second electric capacity C2's the other end, and fourth diode D4's positive pole ground connection, first timer U2's fifth end pass through third electric capacity C3 and connect first timer U2's first end and ground end, and first timer U2's third end is connected switch from locking module 6.
In a specific embodiment, the first timer U2 may be an NE555 timer, and a timing control circuit is formed by the timer, the second capacitor C2, the fourth diode D4, the nineteenth resistor R19, and the third capacitor C3, and outputs a low-level signal at a fixed time and then continuously outputs a high-level signal.
Further, the switching self-locking module 6 includes a first diode D1, an eleventh resistor R11, a twelfth resistor R12, a fifth switching tube VT5, a fifteenth resistor R15, a sixteenth resistor R16, a sixth switching tube VT6, a thirteenth resistor R13, a fourteenth resistor R14, a seventh switching tube VT7, a third power source VCC3, and a second diode D2;
specifically, the anode of the first diode D1 is connected to the third IO end of the first control chip U1, the base of the fifth switch tube VT5 is aware of the third end of the first timer U2, the cathode of the first diode D1 is connected to one end of a twelfth resistor R12, the collector of the fifth switch tube VT5, the base of the sixth switch tube VT6 and one end of a fifteenth resistor R15 through an eleventh resistor R11, the collector of the sixth switch tube VT6 is connected to one end of a fourteenth resistor R14 and the base of the seventh switch tube VT7 through a thirteenth resistor R13, the other end of the fourteenth resistor R14 and the emitter of the seventh switch tube VT7 are both connected to the third power source VCC3, the emitter of the fifth switch tube VT5 is connected to the other end of the fifteenth resistor R15, the emitter of the sixth switch tube VT6 and the ground through a sixteenth resistor R16, and the other end of the twelfth resistor R12 is connected to the collector of the seventh switch tube 7 and the collector of the second diode D2.
In a specific embodiment, the sixth switching tube VT6 may be an NPN-type triode, and the seventh switching tube VT7 may be a PNP-type triode, which are controlled by signal self-locking together; the fifth switching tube VT5 may be an NPN transistor, and is configured to perform self-locking reset control.
Further, the switching self-locking module 6 further includes a first power tube Q1, a seventeenth resistor R17, a second power tube Q2, a third diode Q3, an eighteenth resistor R18, and a third power tube Q3;
specifically, the gate of the first power tube Q1 is connected to the cathode of the second diode D2 and the gate of the third power tube Q3 and is connected to the ground through an eighteenth resistor R18, the drain of the first power tube Q1 is connected to the gate of the second power tube Q2 and is connected to the cathode of the third diode Q3 and the source of the second power tube Q2 through a seventeenth resistor R17, the source of the first power tube Q1 is grounded, the anode of the third diode Q3 is connected to the secondary power module 2, the drain of the third power tube Q3 is connected to the power module 1, and the source of the third power tube Q3 and the drain of the second power tube Q2 are connected to the power source terminal of the first control chip U1.
In a specific embodiment, the first power transistor Q1 may be an N-channel enhancement MOS transistor, and controls the operation of the second switching transistor VT2; the second power tube Q2 and the first power tube Q1 can both adopt P-channel enhancement MOS tubes to respectively control the power supply of the secondary power module 2 and the power module 1.
The utility model relates to a chip intelligent power supply circuit, when the power module 1 is normal, the third power tube Q3 is conducted due to the ground connection, the power module 1 supplies power for the power end of the first control chip U1, simultaneously the first resistor R1 and the second resistor R2 sample the voltage of the power module 1, the sampled signal is subtracted by the first operational amplifier OP1 in cooperation with the reference threshold, if the electric energy rises and exceeds the reference threshold for a certain distance, the second switch tube VT2 is conducted, if the electric energy drops and exceeds the reference threshold for a certain distance, the first switch tube VT1 is conducted, so that the first capacitor C1 stores energy, until the electric energy stored by the first capacitor C1 is enough to trigger the third switch tube VT3 to be conducted, the fluctuation is serious, the third IO end of the first control chip U1 outputs the electric energy switching signal to control the sixth switch tube VT6 to be conducted, and cooperate with seventh switch tube VT7 to continuously output the high level signal to control the first power tube Q1 to switch on, the third power tube Q3 is cut off, make the second switch tube VT2 switch on, secondary power module 2 supplies power for the power end of first control chip U1, avoid the emergence of overvoltage, undervoltage or power failure of power module 1, if power module 1 does not take place the large amplitude fluctuation in the reference threshold range, first switch tube VT1 and second switch tube VT2 are all cut off, the electric energy of first electric capacity C1 will reduce gradually, make fourth switch tube VT4 switch on, first timer U2 outputs the low level signal regularly, until timing the end, fourth switch tube VT4 is still the on-state, first timer U2 will output the high level and control sixth switch tube VT6 to cut off, the self-locking resets, third power tube Q3 switches on, first power tube Q1 cuts off, power module 1 supplies power for the power end of first control chip U1 again.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. An intelligent power supply circuit of a chip is characterized in that,
this chip intelligence supply circuit includes: the device comprises a power supply module, an auxiliary power supply module, an output sampling module, an electric energy fluctuation control module, an intelligent control module, a switching self-locking module and a timing reset module;
the power supply module is used for providing main electric energy required by the circuit;
the auxiliary power supply module is used for providing auxiliary electric energy required by the circuit;
the output sampling module is connected with the power supply module and the intelligent control module and is used for sampling the voltage of the main electric energy output by the power supply module and outputting a voltage signal;
the electric energy fluctuation control module, the output sampling module and the intelligent control module are used for carrying out subtraction processing on the voltage signal and a set reference threshold value through a subtraction control circuit and outputting a first control signal and a second control signal, and the electric energy fluctuation control module is used for triggering the capacitance control circuit to output an electric energy switching signal and a third control signal at regular time through the first control signal and the second control signal;
the intelligent control module is used for receiving the voltage signal and the electric energy switching signal and outputting an electric energy control signal;
the switching self-locking module is connected with the power supply module, the auxiliary power supply module and the intelligent control module, is used for receiving the electric energy control signal and controlling the self-locking work of electric energy switching electric energy through a self-locking circuit, and is used for controlling the switching work of the auxiliary power supply module and the power supply module through the electric energy switching circuit and providing required electric energy for the intelligent control module;
the timing reset module is connected with the electric energy fluctuation control module and the switching self-locking module, is used for controlling the work of the timing control circuit through a third control signal, and is used for outputting a high-level signal at fixed time through the timing control circuit and controlling the switching self-locking module to perform self-locking reset.
2. The chip intelligent power supply circuit according to claim 1, wherein the output sampling module comprises a first resistor and a second resistor; the intelligent control module comprises a first control chip;
the first end of the first resistor is connected with the power supply module, and the second end of the first resistor is connected with the electric energy fluctuation control module and the second IO end of the first control chip and is connected with the ground end through the second resistor.
3. The intelligent power supply circuit for the chip according to claim 2, wherein the electric energy fluctuation control module comprises a third resistor, a reference threshold, a fourth resistor, a first operational amplifier, a fifth resistor, a sixth resistor, a first power supply, a first switching tube and a second switching tube;
one end of the third resistor is connected with the second end of the first resistor, the other end of the third resistor is connected with the in-phase end of the first operational amplifier, the inverting end of the first motion is connected with the reference threshold value and is connected with the ground end through the fourth resistor, the output end of the first operational amplifier is connected with one end of the fifth resistor and one end of the sixth resistor, the other end of the fifth resistor and the other end of the sixth resistor are respectively connected with the base of the first switch tube and the base of the second switch tube, the collector of the first switch tube and the emitter of the second switch tube are both connected with the first power supply, and the emitter of the first switch tube is connected with the collector of the second switch tube.
4. The chip intelligent power supply circuit according to claim 3, wherein the power fluctuation control module further comprises a first capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a third switching tube, a tenth resistor, a fourth switching tube and a second power supply;
the one end of tenth resistance, the one end of eighth resistance and the collecting electrode of second switch tube are connected to the first end of first electric capacity, the second end of first electric capacity and the other end of eighth resistance all reach and decide, and the base of third switch tube is connected to the other end of seventh resistance, and the collecting electrode of third switch tube is connected first power, the projecting pole of third switch tube is connected the first IO end of first control chip and through ninth resistance ground connection, the base of fourth switch tube is connected to the other end of tenth resistance, and the second power is connected to the projecting pole of fourth switch tube, and the collecting electrode of fourth switch tube is connected the timing reset module.
5. The chip intelligent power supply circuit of claim 4, wherein the timing reset module comprises a second capacitor, a fourth diode, a nineteenth resistor, a third capacitor, and a first timer;
the one end of second electric capacity, the fourth end and the eighth end of first timer are all connected the collecting electrode of fourth switch tube, and the other end of second electric capacity is connected the negative pole of fourth diode, the sixth end and the second end of first timer and is held and connect the ground end through nineteenth resistance, and the positive pole ground connection of fourth diode, the first end and the ground end of first timer are connected through the third electric capacity to the fifth end of first timer, and the third end of first timer is connected switch from the locking module.
6. The chip intelligent power supply circuit of claim 5, wherein the switching self-locking module comprises a first diode, an eleventh resistor, a twelfth resistor, a fifth switch tube, a fifteenth resistor, a sixteenth resistor, a sixth switch tube, a thirteenth resistor, a fourteenth resistor, a seventh switch tube, a third power supply and a second diode;
the anode of the first diode is connected with the third IO end of the first control chip, the base of the fifth switching tube knows the third end of the first timer, the cathode of the first diode is connected with one end of the twelfth resistor, the collector of the fifth switching tube, the base of the sixth switching tube and one end of the fifteenth resistor through the eleventh resistor, the collector of the sixth switching tube is connected with one end of the fourteenth resistor and the base of the seventh switching tube through the thirteenth resistor, the other end of the fourteenth resistor and the emitter of the seventh switching tube are both connected with the third power supply, the emitter of the fifth switching tube is connected with the other end of the fifteenth resistor, the emitter and the ground of the sixth switching tube through the sixteenth resistor, and the other end of the twelfth resistor is connected with the collector of the seventh switching tube and the anode of the second diode.
7. The chip intelligent power supply circuit of claim 6, wherein the switching self-locking module further comprises a first power transistor, a seventeenth resistor, a second power transistor, a third diode, an eighteenth resistor, and a third power transistor;
the grid electrode of the first power tube is connected with the cathode of the second diode and the grid electrode of the third power tube and is connected with the ground end through an eighteenth resistor, the drain electrode of the first power tube is connected with the grid electrode of the second power tube and is connected with the cathode of the third diode and the source electrode of the second power tube through a seventeenth resistor, the source electrode of the first power tube is grounded, the anode of the third diode is connected with the secondary power module, the drain electrode of the third power tube is connected with the power module, and the source electrode of the third power tube and the drain electrode of the second power tube are connected with the power end of the first control chip.
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| CN202222992626.8U CN218733409U (en) | 2022-11-10 | 2022-11-10 | Intelligent chip power supply circuit |
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| CN202222992626.8U CN218733409U (en) | 2022-11-10 | 2022-11-10 | Intelligent chip power supply circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117032433A (en) * | 2023-10-09 | 2023-11-10 | 深圳市七彩虹禹贡科技发展有限公司 | Intelligent control circuit for main board power supply |
| CN117435024A (en) * | 2023-12-19 | 2024-01-23 | 深圳市七彩虹禹贡科技发展有限公司 | Safe power supply control circuit of mainboard |
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2022
- 2022-11-10 CN CN202222992626.8U patent/CN218733409U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117032433A (en) * | 2023-10-09 | 2023-11-10 | 深圳市七彩虹禹贡科技发展有限公司 | Intelligent control circuit for main board power supply |
| CN117032433B (en) * | 2023-10-09 | 2024-02-13 | 深圳市七彩虹禹贡科技发展有限公司 | Intelligent control circuit for main board power supply |
| CN117435024A (en) * | 2023-12-19 | 2024-01-23 | 深圳市七彩虹禹贡科技发展有限公司 | Safe power supply control circuit of mainboard |
| CN117435024B (en) * | 2023-12-19 | 2024-03-12 | 深圳市七彩虹禹贡科技发展有限公司 | Safe power supply control circuit of mainboard |
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