CN112398327B - Power supply enabling control circuit - Google Patents

Power supply enabling control circuit Download PDF

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Publication number
CN112398327B
CN112398327B CN201910759457.3A CN201910759457A CN112398327B CN 112398327 B CN112398327 B CN 112398327B CN 201910759457 A CN201910759457 A CN 201910759457A CN 112398327 B CN112398327 B CN 112398327B
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capacitor
resistor
power supply
power
pin
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CN112398327A (en
Inventor
李主红
孙立华
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Shenzhen Hangsheng Electronic Co Ltd
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Shenzhen Hangsheng Electronic Co Ltd
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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
    • H02M1/36—Means for starting or stopping converters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control

Abstract

The invention provides a power supply enabling control circuit which comprises an MCU control circuit, a power supply enabling circuit and a power supply control circuit, wherein the MCU control circuit is connected with the power supply enabling circuit, the power supply enabling circuit is connected with the power supply control circuit, the power supply control circuit is connected with the MCU control circuit, and the design realizes the function of reducing the leakage current of a vehicle-mounted ECU.

Description

Power supply enabling control circuit
Technical Field
The invention discloses a power supply enabling control circuit, and belongs to the technical field of leakage current control of a vehicle-mounted ECU.
Background
With the development of automobile intellectualization, more and more ECUs (Electronic Control units) are installed on an automobile, wherein a common ECU comprises a Microprocessor (MCU), a memory (ROM, RAM), an input/output interface (I/O), an analog-to-digital converter (a/D), a large-scale integrated circuit for shaping, driving and the like, and power supply of the ECU is provided by an automobile battery due to various requirements and design considerations, so that after the automobile is shut down, strict requirements are provided for leakage currents of various ECUs connected with the battery, the leakage current of a single EUC is required to be not more than 1mA in a common automobile factory, and the leakage current of a single ECU is required to be not more than 0.1mA in some joint or foreign automobile factories, and the existing vehicle-mounted ECU power supply circuit has large leakage current and cannot meet the production requirements of the automobile factories.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a power supply enabling control circuit to solve the problems in the background art, and the power supply enabling control circuit realizes the function of reducing the leakage current of a vehicle-mounted ECU, and has good stability and high reliability.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a power enable control circuit, includes MCU control circuit, power enable circuit and power control circuit, MCU control circuit is connected with power enable circuit, power enable circuit is connected with power control circuit, power control circuit is connected with MCU control circuit.
Further, MCU control circuit includes main control chip U20, electric capacity C2 and resistance R10, MCU control circuit includes main control chip U20, the first branch road of No. 1 pin of main control chip U20 is through electric capacity C2 ground connection, and the second branch road passes through resistance R10 and connects the power terminal, No. 2 pin of main control chip U20 connects the power terminal, No. 3 pin, No. 5 pin and No. 7 pin of main control chip U20 all ground connection, No. 37 pin of main control chip U20 connects the power terminal, No. 38 pin of main control chip U20 is ungrounded.
Further, the chip model of the main control chip U20 is S9S12G64F0 MLF. Further, the power supply enabling circuit comprises a zener diode D4, a diode D1, a diode D3, a resistor R4, a resistor R1, a resistor R7, a resistor R2 and a resistor R5, wherein a cathode of the zener diode D4 is connected to one end of a resistor R4, the other end of the resistor R4 is connected to one end of a resistor R1, the other end of the resistor R1 is connected to one end of a resistor R7, the other end of the resistor R7 is grounded, an anode of the zener diode D4 is connected to one end of a resistor R2, a second branch is connected to an anode of a diode D1, the other end of the resistor R2 is grounded, a cathode of the diode D1 is connected to a cathode of the zener diode D2, an anode of the zener diode D2 is grounded, a cathode of the zener diode D2 is connected to a cathode of a diode D3, an anode of the diode D3 is connected to one end of the resistor R5, and a second branch is connected to one end of the resistor R6, the other end of the resistor R5 is grounded.
Further, the power supply enabling circuit further comprises a capacitor C1, a capacitor C3, a capacitor C4 and a capacitor C6; one end of the capacitor C1 is connected with the cathode of the voltage stabilizing diode D4 through a resistor R4, and the other end of the capacitor C1 is grounded through a capacitor C3; one end of the capacitor C4 is connected with the capacitor C6, and the other end of the capacitor C4 is grounded; the other end of the capacitor C6 is connected with the second branch of the other end of the resistor R4.
Furthermore, the power supply enabling circuit further comprises a capacitor C7 and a capacitor C8, one end of the capacitor C7 is connected with the second branch of the cathode of the diode D1, the other end of the capacitor C7 is grounded, and the capacitor C8 and the resistor R7 are connected in parallel.
Further, the chip model of the zener diode D4 is SZMM3Z3V3T 1G.
Furthermore, the POWER control circuit comprises a POWER control chip U14, a capacitor C89, a capacitor C255, a capacitor C288, a capacitor C260, a resistor R39, a capacitor C259, an inductor L15, a resistor R190, a capacitor C108, a capacitor C256, a capacitor C94, a capacitor C95 and a capacitor C168, a first pin 9 of the POWER control chip U14 is connected with one end of the capacitor C89, the other end of the capacitor C35is grounded, the capacitor C255 is connected with the capacitor C89 in parallel, the capacitor C288 is connected with the capacitor C255 in parallel, the capacitor C260 is connected with the capacitor C288 in parallel, a pin 10 of the POWER control chip U14 is connected with a second pin 9 of the POWER control chip U14, a pin 8 of the POWER control chip U14 is connected with POR _ EN, a first pin 4 of the POWER control chip WEU 14 is grounded through the capacitor C93 and the second pin is grounded through the resistor R257, a pin 6 of the POWER control chip U14 is grounded through the resistor R39, and a pin 7 of the POWER control chip U14 is grounded, The pin No. 12 and the pin No. 13 are both grounded, the pin No. 3 of the power control chip U14 is connected with one end of a capacitor C259, the first branch at the other end of the capacitor C259 is connected with one end of an inductor L15, the other end of the inductor L15 is connected with one end of a resistor R115, the other end of the resistor R115 is connected with one end of a resistor R190, the other end of the resistor R190 is grounded, one end of a capacitor C96 is connected with one end of an inductor L15, the other end of a capacitor C96 is grounded, a capacitor C256 is connected with a capacitor C96 in parallel, a capacitor C168 is connected with the capacitor C256 in parallel, a capacitor C94 is connected with a capacitor C168 in parallel, a capacitor C108 is connected with a capacitor C94 in parallel, a capacitor C25 is connected with a capacitor C108 in parallel, the pin No. 1 and the pin No. 2 of the power control chip U14 are both connected with the second branch at the other end of the capacitor C259, and the pin No. 5 of the power control chip U14 is connected with a connection node of the resistor R115 and the resistor R190.
Further, the power control chip U14 has a chip model of LMR23630FQDRRRQ 1.
The invention has the beneficial effects that: according to the power supply enabling control circuit, the MCU control circuit, the power supply enabling circuit and the power supply control circuit are added, the function of reducing the leakage current of the vehicle-mounted ECU is achieved through the design, and the problems that the existing vehicle-mounted ECU power supply circuit has large leakage current and cannot meet the production requirements of a vehicle factory are solved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of a power enable control circuit module according to the present invention.
FIG. 2 is a schematic circuit diagram of the MCU control circuit of FIG. 1;
FIG. 3 is a circuit schematic of the power enable circuit of FIG. 1;
fig. 4 is a circuit schematic diagram of the power control circuit of fig. 1.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Fig. 1 is a schematic diagram of a power enable control circuit module according to the present invention. The invention provides a power supply enabling control circuit, which comprises an MCU control circuit, a power supply enabling circuit and a power supply control circuit, wherein the MCU control circuit is connected with the power supply enabling circuit, the power supply enabling circuit is connected with the power supply control circuit, and the power supply control circuit is connected with the MCU control circuit; the MCU control circuit is used for processing the signals collected by the POWER supply enabling circuit and outputting control signals (MCU _ POWER _ EN) to the POWER supply enabling circuit. The POWER supply enabling circuit is used for sampling the voltage signal IGN and outputting a voltage sampling signal (IGN _ DECTECT) to the MCU control circuit, and meanwhile, outputting a switch signal (POWER _ EN) to the POWER supply control circuit to control the work of the POWER supply control circuit. The power supply control circuit is used for converting the power supply signal and providing power supply output for the MCU control circuit and other devices of the vehicle-mounted ECU.
Referring to fig. 2, the MCU control circuit includes a main control chip U20, a capacitor C2 and a resistor R10, the resistor R10 and the capacitor C2 provide RC reset for the U20, the MCU control circuit includes a main control chip U20, a first branch of a pin 1 of the main control chip U20 is grounded through the capacitor C2, a second branch is connected to the power terminal through a resistor R10, and in the present application, the power terminal outputs 5V voltage. And the No. 2 pin of the main control chip U20 is connected with a power terminal to supply power to the main control chip U20. Pin 3, pin 5 and pin 7 of the main control chip U20 are all grounded, pin 35 of the main control chip U20 receives the IGN _ DECTECT sampling signal, pin 37 of the main control chip U20 is connected to the power supply terminal, pin 38 of the main control chip U20 is not grounded, and pin 46 of the main control chip U20 is not grounded.
The chip model of the main control chip U20 is S9S12G64F0MLF, and S9S12G64F0MLF is a vehicle-scale MCU.
Referring to fig. 3, a signal terminal IGN is connected to a vehicle body IGN POWER supply, a signal terminal POWER _ EN is connected to pin 8 of a POWER control chip U14 (see fig. 4), and further outputs a switching signal to a POWER control chip U14, the POWER enable circuit includes a zener diode D4, a diode D1, a resistor R4, a resistor R1, a capacitor C1, a capacitor C3, a capacitor C6, a capacitor C8, a resistor R8, and a resistor R8, a cathode of the zener diode D8 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to one end of the resistor R8, a first branch of the other end of the resistor R8 is connected to one end of the capacitor C8, the other end of the capacitor C8 is connected to one end of the cathode of the zener diode D8, the other end of the capacitor C8 is connected to the ground, the other end of the resistor R8 is connected to the resistor R8, and the other end of the resistor R8 is connected to the ground, the capacitor C8 and the resistor R7 are connected in parallel, a first anode branch of the zener diode D4 is connected with one end of the resistor R2, the other end of the resistor R2 is grounded, a second anode branch of the zener diode D4 is connected with the anode of the diode D1, a first cathode branch of the diode D1 is connected with the cathode of the zener diode D2, a second branch of the diode D2 is connected with one end of the capacitor C7, the anode of the zener diode D2 is grounded, the other end of the capacitor C7 is grounded, the cathode of the zener diode D2 is connected with the cathode of the diode D3, the first anode branch of the diode D3 is connected with one end of the resistor R5, the second branch of the resistor R6, and the other end of the resistor R5 is grounded.
In the present application, the capacitor C1, the capacitor C3, the capacitor C6, and the capacitor C4 are filter capacitors, and the resistor R4 is a current-limiting resistor. After the automobile is ignited, the voltage stabilizing diode D4 is subjected to reverse breakdown, the resistance value of the resistor R2 is adjusted, the voltage value of the IGN corresponding to the reverse breakdown of the voltage stabilizing diode D4 is changed, the IGN voltage limiting value of the ECU prohibited to be started by different automobile factories is further met, the voltage stabilizing tube D2 plays an overvoltage protection role in an 8-number pin of the main control chip U14, the capacitor C7 can absorb small fluctuation on a POWER _ EN signal line and further play a filtering role, and the capacitor C8 can absorb small jitter on the sampling voltage IGN _ DETECT, so that the accuracy of the sampling voltage IGN _ DETECT is ensured.
The chip model of the voltage stabilizing diode D4 is SZMM3Z3V3T1G, the reverse current of the diode is small, and no voltage drop is formed on the resistor R4.
Referring to fig. 4, the signal terminal POWER is connected to the car BAT terminal, the signal terminal POWER _ EN is connected to the pin 8 of the POWER control chip U14, and controls the POWER control chip U14 to be turned on and off, the POWER control circuit includes a POWER control chip U14, a capacitor C89, a capacitor C255, a capacitor C288, a capacitor C260, a resistor R39, a capacitor C259, an inductor L15, a resistor R190, a capacitor C108, a capacitor C256, a capacitor C94, a capacitor C95, and a capacitor C168, the first pin 9 of the POWER control chip U14 is connected to one end of the capacitor C89, the other end is grounded, the capacitor C255 is connected in parallel to the capacitor C89, the capacitor C288 is connected in parallel to the capacitor C255, the capacitor C260 is connected in parallel to the capacitor C288, the pin 10 of the POWER control chip U14 is connected to the second pin 9 of the POWER control chip U14, the pin 8 of the POWER control chip U14 is connected to the pin por _ 14, and the first pin 4 of the POWER control chip U93 is connected to the ground through the capacitor C35, The second branch is grounded through a resistor R257, the pin No. 6 of the power control chip U14 is grounded through a resistor R39, the pin No. 7, the pin No. 12 and the pin No. 13 of the power control chip U14 are grounded, the pin No. 3 of the power control chip U14 is grounded, the other end of the capacitor C259 is grounded at one end of an inductor L15, the other end of an inductor L15 is grounded at one end of a resistor R115, the other end of the resistor R115 is connected at one end of a resistor R190, the other end of the resistor R190 is grounded, one end of a capacitor C96 is connected at one end of an inductor L15, the other end of a capacitor C96 is grounded, the capacitor C256 is connected in parallel with a capacitor C96, the capacitor C168 is connected in parallel with the capacitor C256, the capacitor C94 is connected in parallel with the capacitor C168, the capacitor C108 is connected in parallel with the capacitor C94, the capacitor C95 is connected in parallel with the capacitor C108, the pin No. 1 and the pin No. 2 of the power control chip U14 are connected with the second branch at the other end of the capacitor C259, and a pin No. 5 of the power control chip U14 is connected with the connecting node of the resistor R115 and the resistor R190.
In the present application, the power control chip U14 is a voltage-reducing power chip with a wide operating voltage range of 4-40V, and when the voltage of pin No. 8 of the power control chip U14 is greater than 1.7V, when the power control chip U14 works, after the automobile is ignited, the IGN signal can make the power control chip U14 supply power for the main control chip U20 through the power enable circuit, after the main control chip U20 runs, all levels of the whole system can be powered on, meanwhile, the MCU _ POWER _ EN continuously outputs a high-level signal, the resistor R1 and the resistor R7 in the POWER supply enabling circuit form a voltage division network, the main control chip U20 samples the voltage signal, when the system is flamed out, the IGN _ DECTECT signal voltage collected by the main control chip U20 is 0, so as to judge that the automobile is flamed out, and then all power supplies are turned off, so that the function of reducing the leakage current of the vehicle-mounted ECU is realized.
The power control chip U14 has a chip model of LMR23630FQDRRRQ1, LMR23630FQDRRRQ1 is a synchronous buck converter with 3A output and 3.8V-36V input.
The working principle of the application is as follows: after the automobile is ignited, the voltage of the signal terminal IGN is 13.5V, the voltage stabilizing diode D4 is broken down, a set voltage is obtained through a voltage dividing network of a resistor R4 and a resistor R2, the voltage is the voltage of the signal terminal POWER _ EN, the signal terminal POWER _ EN is input by an enabling pin of the POWER control chip U14, the POWER control chip U14 is controlled to be turned on and turned off, when the voltage of the signal terminal POWER _ EN is larger than 1V, the POWER control chip U14 works, when the voltage of the signal terminal POWER _ EN is smaller than 0.3V, the POWER control chip U14 stops working, the capacitor C1 and the capacitor C3 are connected in series, the capacitor C4 and the capacitor C6 are connected in series, and spike pulse voltage on the signal terminal IGN is filtered out.
When the IGN voltage of the signal terminal is less than 5.3V, the voltage V (POWER _ EN) of POWER _ EN is equal to V (IGN) -V (D1) -V (D4) -V (R2/R4+ R2), V (POWER _ EN) <1V due to V (IGN) <5.3V, and U14 cannot be opened even if the automobile is ignited at this time, so when the IGN voltage of the signal terminal is too low, the POWER supply control chip U14 cannot be opened to supply POWER to the system, and meanwhile, the voltage-stabilizing diodes with different breakdown voltage values can be selected according to requirements to set the signal terminal IGN voltage castration value of the system operation.
Because the existing electronic control systems on the automobile are complex, after the automobile is shut down, the electronic control system needs to store important data and can finish data storage for several seconds or even longer, a voltage signal IGN _ DECTECT is obtained by dividing the voltage of a signal terminal IGN through a resistor R1 and a resistor R7, the voltage signal IGN _ DECTECT is output to an AD sampling pin of a main control chip U20, after the automobile is ignited and started, a POWER supply control chip U14 is turned on to provide 5V POWER supply output to the system (also comprising a 5V POWER supply for the main control chip U20), a main control chip U20 works to further output a 5V high-level signal MCU _ POWER _ EN, the voltage of the signal terminal MCU _ POWER _ EN is divided by a resistor R5 and a resistor R6 and then is connected to a signal terminal POWER _ EN signal line after passing through a diode D3, and after the automobile is shut down, the voltage of the signal terminal IGN is 0V, then the voltage signal of the signal terminal IGN _ DECTECT sampled by the main control chip U20 is 0V, the main control chip U20 can continue to output a high level signal MCU _ POWER _ EN to turn on the POWER control chip U14 and maintain the POWER supply of the system until the system stores data, the signal terminal IGN _ DECTECT signal provides voltage detection for the delayed shutdown of the system, and the signal terminal MCU _ POWER _ EN signal provides a POWER enable signal for the delayed shutdown of the system.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. 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 (8)

1. The utility model provides a power enable control circuit, includes MCU control circuit, power enable circuit and power control circuit, its characterized in that: the MCU control circuit is connected with a power supply enabling circuit, the power supply enabling circuit is connected with the power supply control circuit, and the power supply control circuit is connected with the MCU control circuit; the power supply enabling circuit is used for sampling a voltage signal, outputting the voltage sampling signal to the MCU control circuit and simultaneously outputting a switching signal to the power supply control circuit to control the work of the power supply control circuit; the power supply control circuit is used for converting a power supply signal and providing power supply output for the MCU control circuit; the MCU control circuit is used for processing the signals collected by the power supply enabling circuit and outputting control signals to the power supply enabling circuit;
the power supply enabling circuit comprises a voltage stabilizing diode D4, a diode D1, a diode D3, a resistor R4, a resistor R1, a resistor R7, a resistor R2 and a resistor R5, the cathode of the voltage-stabilizing diode D4 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with one end of a first branch of a resistor R1, the other end of the resistor R1 is connected with one end of a resistor R7, the other end of the resistor R7 is grounded, the anode of the zener diode D4 is connected to one end of the resistor R2, the second branch is connected to the anode of the diode D1, the other end of the resistor R2 is grounded, the first branch of the cathode of the diode D1 is connected with the cathode of the voltage stabilizing diode D2, the anode of the voltage-stabilizing diode D2 is grounded, the cathode of the voltage-stabilizing diode D2 is connected with the cathode of the diode D3, the anode of the diode D3 is connected with one end of a resistor R5, the second branch is connected with one end of a resistor R6, and the other end of the resistor R5 is grounded.
2. A power supply enable control circuit as claimed in claim 1, wherein: the MCU control circuit comprises a main control chip U20, a capacitor C2 and a resistor R10, wherein a first branch of a No. 1 pin of the main control chip U20 is grounded through the capacitor C2, a second branch of the No. 1 pin is connected with a power terminal through a resistor R10, a No. 2 pin of the main control chip U20 is connected with the power terminal, a No. 3 pin, a No. 5 pin and a No. 7 pin of the main control chip U20 are all grounded, and a No. 37 pin of the main control chip U20 is connected with the power terminal.
3. A power supply enable control circuit as claimed in claim 2, wherein: the chip model of the main control chip U20 is S9S12G64F0 MLF.
4. A power supply enable control circuit as claimed in claim 1, wherein: the power supply enabling circuit further comprises a capacitor C1, a capacitor C3, a capacitor C4 and a capacitor C6; one end of the capacitor C1 is connected with the cathode of the voltage stabilizing diode D4 through a resistor R4, and the other end of the capacitor C1 is grounded through a capacitor C3; one end of the capacitor C4 is connected with the capacitor C6, and the other end of the capacitor C4 is grounded; the other end of the capacitor C6 is connected with the second branch of the other end of the resistor R4.
5. A power supply enable control circuit as claimed in claim 1, wherein: the power supply enabling circuit further comprises a capacitor C7 and a capacitor C8, one end of the capacitor C7 is connected with the second branch of the cathode of the diode D1, the other end of the capacitor C7 is grounded, and the capacitor C8 is connected with the resistor R7 in parallel.
6. A power supply enable control circuit as claimed in claim 1, wherein: the chip model of the voltage stabilizing diode D4 is SZMM3Z3V3T 1G.
7. A power supply enable control circuit as claimed in claim 1, wherein: the POWER control circuit comprises a POWER control chip U14, a resistor R115, a resistor R257, a capacitor C89, a capacitor C255, a capacitor C288, a capacitor C260, a resistor R39, a capacitor C259, an inductor L15, a resistor R190, a capacitor C108, a capacitor C256, a capacitor C94, a capacitor C95, a capacitor C96 and a capacitor C168, wherein a No. 9 pin of the POWER control chip U14 is connected with one end of the capacitor C89, the other end of the capacitor C89 is grounded, the capacitor C255 is connected with the capacitor C89 in parallel, the capacitor C288 is connected with the capacitor C255 in parallel, the capacitor C260 is connected with the capacitor C288 in parallel, a No. 10 pin of the POWER control chip U14 is connected with a No. 9 pin second branch of the POWER control chip U14, a No. 8 pin of the POWER control chip U14 is connected with a POWER _ EN, a No. 4 pin of the POWER control chip U14 is connected with the capacitor C93 and the ground through the resistor R257, a No. 6 pin of the POWER control chip U14 is connected with the ground through a resistor R2 pin of the POWER control chip U5967, The pin No. 12 and the pin No. 13 are both grounded, the pin No. 3 of the power control chip U14 is connected with one end of a capacitor C259, the first branch at the other end of the capacitor C259 is connected with one end of an inductor L15, the other end of the inductor L15 is connected with one end of a resistor R115, the other end of the resistor R115 is connected with one end of a resistor R190, the other end of the resistor R190 is grounded, one end of a capacitor C96 is connected with one end of an inductor L15, the other end of a capacitor C96 is grounded, a capacitor C256 is connected with a capacitor C96 in parallel, a capacitor C168 is connected with the capacitor C256 in parallel, a capacitor C94 is connected with a capacitor C168 in parallel, a capacitor C108 is connected with a capacitor C94 in parallel, a capacitor C95 is connected with a capacitor C108 in parallel, the pin No. 1 and the pin No. 2 of the power control chip U14 are both connected with the second branch at the other end of the capacitor C259, and the pin No. 5 of the power control chip U14 is connected with a connection node of the resistor R115 and the resistor R190.
8. The power supply enable control circuit of claim 7, wherein: the power control chip U14 has a chip model of LMR23630FQDRRRQ 1.
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