CN220273524U - Power supply circuit capable of reducing working power consumption - Google Patents
Power supply circuit capable of reducing working power consumption Download PDFInfo
- Publication number
- CN220273524U CN220273524U CN202321341108.8U CN202321341108U CN220273524U CN 220273524 U CN220273524 U CN 220273524U CN 202321341108 U CN202321341108 U CN 202321341108U CN 220273524 U CN220273524 U CN 220273524U
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- power supply
- triode
- resistor
- electrode
- voltage
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- 239000003990 capacitor Substances 0.000 claims abstract description 9
- 230000000737 periodic effect Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Control Of Voltage And Current In General (AREA)
Abstract
The utility model provides a power supply circuit for reducing working power consumption, which comprises a first triode connected with the output end of an MCU control chip, wherein the C electrode of the first triode is electrically connected with the B electrode of a second triode, the E electrode of the second triode is connected with an input voltage, and the C electrode of the second triode is connected with a pull-up power supply; a first capacitor and a first resistor are pulled down between the C pole of the second triode and the pull-up power supply; the pull-up power supply is connected with a voltage dividing resistor, the voltage dividing resistor is connected with a voltage output end, the VBAT_SW_OUT port controlled by the MCU is modulated, the VBAT_SW outputs a square wave signal with a constant period to the input detection circuit, so that continuous power supply is changed into periodic power supply, and the power consumption is obviously reduced.
Description
Technical Field
The utility model relates to the field of input detection circuits of automobile ECU functional modules, in particular to a power supply circuit for reducing working power consumption.
Background
The automobile ecu refers to a computer control module, also called an electronic control unit, a traveling computer, a vehicle-mounted computer and the like. The function of ecu is: fault self-diagnosis and protection function, when the system has fault, it can automatically record fault code in ram and adopts protection measure to read the substituted program from the above-mentioned inherent program to maintain operation of engine. The function of the automobile ecu is to monitor various input data and various running states of the automobile at any time, calculate information sent by various sensors according to a pre-designed program, send various parameters to various related execution mechanisms after processing, and execute various preset control functions.
The current automobile ECU supplies power to low-voltage direct current, and the power supply is from a storage battery on the automobile and is divided into a 12V direct current voltage system and a 24V direct current voltage system according to different operating voltages of the automobile. The input detection polls according to the software time sequence, if 12V or 24V constant electricity is always supplied, the working power consumption of the ECU is obviously increased under the condition of more input signals.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a power supply circuit for reducing the working power consumption, which comprises a first triode connected with the output end of an MCU control chip, wherein the C electrode of the first triode is electrically connected with the B electrode of a second triode, the E electrode of the second triode is connected with an input voltage, and the C electrode of the second triode is connected with a pull-up power supply; a first capacitor and a first resistor are pulled down between the C pole of the second triode and the pull-up power supply; the pull-up power supply is connected with a voltage dividing resistor, and the voltage dividing resistor is connected with a voltage output end.
Preferably, the pull-up power supply is a square wave signal with constant period.
Preferably, the voltage dividing resistor comprises a second resistor and a third resistor, and the voltage output end is connected between the second resistor and the third resistor.
Preferably, a second capacitor and a diode are pulled down between the voltage output terminal and the second resistor and the third resistor.
Preferably, the input voltage is 12V or 24V dc.
The power supply circuit for reducing the working power consumption has the following beneficial effects: the VBAT_SW_OUT port controlled by the MCU is modulated, the VBAT_SW outputs a square wave signal with a constant period to the input detection circuit, so that continuous power supply is changed into periodic power supply, and the power consumption is obviously reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.
FIG. 1 is a schematic circuit diagram of the present utility model;
FIG. 2 is a graph of the output voltage test without periodic power supply according to the present utility model;
FIG. 3 is a graph of the output voltage test of the circuit according to the present utility model;
wherein, 1, MCU controls the chip output end; 2. a first triode; 3. a second triode; 4. a first capacitor; 5. a first resistor; 6. a second resistor; 7. a third resistor; 8. a second capacitor; 9. a diode; 10. an input voltage; 11. and pulling up the power supply.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
As shown in fig. 1, the utility model provides a power supply circuit for reducing working power consumption, which comprises a first triode 2 connected with an output end 1 of an MCU control chip, wherein a C electrode of the first triode 2 is electrically connected with a B electrode of a second triode 3, an E electrode of the second triode 3 is connected with an input voltage 10, the input voltage 10 is 12V or 24V direct current, a C electrode of the second triode 3 is connected with a pull-up power supply 11, and the pull-up power supply 11 is a square wave signal with constant period; a first capacitor 4 and a first resistor 5 are pulled down between the C pole of the second triode 3 and the pull-up power supply 11; the pull-up power supply 11 is connected with a voltage dividing resistor, the voltage dividing resistor comprises a second resistor 6 and a third resistor 7, the voltage output end is connected between the second resistor 6 and the third resistor 7, the voltage dividing resistor is connected with a voltage output end, a second capacitor 8 and a diode 9 are pulled down between the voltage output end and the second resistor 6 and the third resistor 7, and the voltage output end monitors output voltage in real time, so that accurate control of the output end is achieved.
The period and duty cycle of vbat_sw_out are controlled by the MCU, thereby controlling v_bat_sw to output a periodic square wave power supply signal. The output voltage value is collected through the V_BAT_AN sampling resistor, the output voltage value is fed back in real time, the output VBAT_SW is used as a pull-up power supply 11 for the input detection circuit, the typical duty ratio value in the working process is 1/10, so that the power consumption on the resistor of the input circuit is effectively reduced, the VBAT_SW outputs a square wave signal with a constant period to the input detection circuit, the continuous power supply is changed into periodic power supply, and the power consumption is obviously reduced.
Through voltage detection, as shown in fig. 2, the voltage test chart is a constant output voltage test chart without passing the period, the power supply mode is direct power supply, the actual static working power consumption is about 15mA, as shown in fig. 3, the voltage test using the circuit is that the power supply period is about 192ms, and the power supply time is 3ms each time. The actual static working power consumption is about 1.53mA, and the work is reduced by about 89.8% through calculation.
Claims (5)
1. The power supply circuit for reducing the working power consumption is characterized by comprising a first triode connected with the output end of an MCU control chip, wherein the C electrode of the first triode is electrically connected with the B electrode of a second triode, the E electrode of the second triode is connected with an input voltage, and the C electrode of the second triode is connected with a pull-up power supply; a first capacitor and a first resistor are pulled down between the C pole of the second triode and the pull-up power supply; the pull-up power supply is connected with a voltage dividing resistor, and the voltage dividing resistor is connected with a voltage output end.
2. The power supply circuit for reducing operating power consumption according to claim 1, wherein the pull-up power supply is a periodic constant square wave signal.
3. The power supply circuit for reducing operating power consumption according to claim 1, wherein the voltage dividing resistor includes a second resistor and a third resistor, and the voltage output terminal is connected between the second resistor and the third resistor.
4. The power circuit for reducing operating power consumption according to claim 1, wherein a second capacitor and a diode are pulled down between the voltage output terminal and the second resistor and the third resistor.
5. The power supply circuit for reducing operating power consumption according to claim 1, wherein the input voltage is 12V or 24V dc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321341108.8U CN220273524U (en) | 2023-05-30 | 2023-05-30 | Power supply circuit capable of reducing working power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321341108.8U CN220273524U (en) | 2023-05-30 | 2023-05-30 | Power supply circuit capable of reducing working power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220273524U true CN220273524U (en) | 2023-12-29 |
Family
ID=89298192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321341108.8U Active CN220273524U (en) | 2023-05-30 | 2023-05-30 | Power supply circuit capable of reducing working power consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220273524U (en) |
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2023
- 2023-05-30 CN CN202321341108.8U patent/CN220273524U/en active Active
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