CN113206522A - Low standby power consumption power supply circuit and electronic equipment - Google Patents

Low standby power consumption power supply circuit and electronic equipment Download PDF

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Publication number
CN113206522A
CN113206522A CN202110419764.4A CN202110419764A CN113206522A CN 113206522 A CN113206522 A CN 113206522A CN 202110419764 A CN202110419764 A CN 202110419764A CN 113206522 A CN113206522 A CN 113206522A
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China
Prior art keywords
unit
switch
power supply
resistor
switch unit
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CN202110419764.4A
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Chinese (zh)
Inventor
董林华
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Shenzhen Topband Co Ltd
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Shenzhen Topband Co Ltd
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Priority to CN202110419764.4A priority Critical patent/CN113206522A/en
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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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors

Abstract

The invention relates to a low standby power consumption power supply circuit and electronic equipment, comprising: the power supply switching device comprises a power supply input end, a delay switch unit, a power supply conversion unit, a controller module, a first switch unit and a second switch unit; the first switch unit is connected with the power input end, the power conversion unit and the delay switch unit, supplies power to the power conversion unit and the delay switch unit when being triggered and conducted, and is conducted when being electrified and is turned off after a preset time; the power supply conversion unit is connected with the delay switch unit and the controller module and is used for outputting power supply voltage when the delay switch unit is in a conducting state; the second switch unit is connected with the controller module and is switched on or off when the controller module outputs a control level; the power supply conversion unit is also connected with the second switch unit to maintain output when the second switch unit is switched on, and stops outputting when the second switch unit and the delay switch unit are both in an off state. The implementation of the invention can reduce the standby power consumption of the equipment and improve the standby power consumption level of the whole machine.

Description

Low standby power consumption power supply circuit and electronic equipment
Technical Field
The invention relates to the technical field of electronics, in particular to a power supply circuit with low standby power consumption and electronic equipment.
Background
At present, a lot of electronic equipment is powered by batteries, for example, a floor washing machine, and a control panel of the floor washing machine mainly comprises high-power devices, so that standby working current of the floor washing machine is large, and generally more than dozens of MA (mass storage) devices. Meanwhile, the power consumption of the floor washing machine in the industry is reduced by adopting a mode that a power-on switch such as a key switch and a knob switch cuts off a power supply. However, in practical use, it often happens that a user forgets to turn off the switch after using the device or the switch is triggered to be turned on due to some misoperation in a non-working requirement scene, so that the device is in a standby state, the battery power is wasted, and even the battery power of a light-emitting battery may be generated, and the battery is permanently damaged.
In some scenarios, although a battery level detection function and a long standby detection function are provided, when a low battery level or a standby time process is detected, various peripheral functions are turned off through an internal MCU, for example, an LCD screen is turned off, a communication IC is disabled, and the like, to enter a further sleep mode to degrade standby power consumption. However, at this time, the circuits of the MCU and the peripheral are not powered off, and the MCU and the peripheral are still in a charged state and consume electric energy.
Disclosure of Invention
The present invention provides a power supply circuit with low standby power consumption and an electronic device, aiming at some technical defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a low standby power consumption power supply circuit is constructed, and comprises: the power supply switching device comprises a power supply input end, a delay switch unit, a power supply conversion unit, a controller module, a first switch unit and a second switch unit;
the first switch unit is connected with the power input end, the power conversion unit and the delay switch unit and used for supplying power to the power conversion unit and the delay switch unit when the first switch unit is triggered to be switched on, wherein the delay switch unit is configured to be switched on when being powered on and switched off after being powered on for a preset time;
the power supply conversion unit is connected with the delay switch unit and the controller module and is used for outputting power supply voltage to the controller module when the delay switch unit is in a conducting state so as to enable the controller module to be electrified and operated;
the second switch unit is connected with the controller module and is used for being switched on when the controller module outputs a first control level and being switched off when the controller module outputs a second control level;
the power supply conversion unit is further connected with the second switch unit and used for maintaining and outputting the power supply voltage when the second switch unit is in a conducting state and stopping outputting the power supply voltage when the second switch unit and the delay switch unit are in a turn-off state.
Preferably, the delay switch unit includes a voltage stabilizing unit, a delay unit and a switch driving unit;
the first end of the voltage stabilizing unit is connected with the first switch unit, the second end of the voltage stabilizing unit is connected with the first end of the delay unit, the third end of the voltage stabilizing unit is grounded, the second end of the delay unit is connected with the first end of the switch driving unit, the second end of the switch driving unit is connected with the first switch unit, and the third end of the switch driving unit is connected with the power supply conversion unit.
Preferably, the delay unit comprises a reset chip U2; the second end of the voltage stabilizing unit is connected with the third pin of the reset chip U2, the second pin of the reset chip U2 is connected with the first end of the switch driving unit, and the first pin of the reset chip U2 is grounded; and/or
The voltage stabilizing unit comprises a voltage stabilizing tube DZ1 and a first resistor R4, the first end of the first resistor R4 is connected with the first switch unit, the second end of the first resistor R4 is connected with the cathode of the voltage stabilizing tube DZ1 and the first end of the time delay unit, and the anode of the voltage stabilizing tube DZ1 is grounded.
Preferably, the switch driving unit includes a first sub-switching unit and a second sub-switching unit;
the first end of the first sub-switch unit is connected with the second end of the delay unit, the second end of the first sub-switch unit is connected with the first switch unit, the third end of the first sub-switch unit is connected with the first end of the second sub-switch unit, and the second end of the second sub-switch unit is connected with the power supply conversion unit.
Preferably, the first sub-switching unit includes: the circuit comprises a first switch tube Q4, a second resistor R6, a third resistor R3 and a fourth resistor R8;
the first end of the first switch tube Q4 is connected to the first end of the second resistor R6, the second end of the second resistor R6 is connected to the second end of the delay unit, the second end of the first switch tube Q4 is connected to the first end of the third resistor R3, the first end of the fourth resistor R8 and the second sub-switch unit, the second end of the third resistor R3 is connected to the first switch unit, the second end of the fourth resistor R8 is grounded, and the third end of the first switch tube Q4 is grounded.
Preferably, the second sub-switching unit includes a second switching tube Q2, a first end of the second switching tube Q2 is connected to the first sub-switching unit, a second end of the second switching tube Q2 is connected to the power conversion unit, and a third end of the second switching tube Q2 is grounded.
Preferably, the power conversion unit includes an enable signal generation unit and a power conversion chip U1;
the first end of the enabling signal generating unit is connected with the time delay switch unit and the second switch unit, the second end of the enabling signal generating unit is connected with the input end of the power supply conversion chip U1, the third end of the enabling signal generating unit is connected with the enabling end of the power supply conversion chip U1, the input end of the power supply conversion chip U1 is connected with the first switch unit, and the output end of the power supply conversion chip U1 is connected with the controller module.
Preferably, the enable signal generating unit includes a third switching tube Q1, a fifth resistor R1, a sixth resistor R2, a seventh resistor R5, and an eighth resistor R9;
a first end of the third switching tube Q1 is connected to a first end of the fifth resistor R1 and a first end of the sixth resistor R2, a second end of the fifth resistor R1 is connected to the first switching unit, a second end of the sixth resistor R2 is connected to the second switching unit and the delay switching unit, a second end of the third switching tube Q1 is connected to a first end of the seventh resistor R5, a second end of the seventh resistor R5 is connected to an enable end of the power conversion chip U1 and a first end of the eighth resistor R9, a second end of the eighth resistor R9 is grounded, and a third end of the third switching tube Q1 is connected to the first switching unit.
Preferably, the second switching unit includes a fourth switching tube Q3 and a ninth resistor R7;
the first end of the fourth switching tube Q3 is connected to the first end of the ninth resistor R7, the second end of the ninth resistor R7 is connected to the controller module, the second end of the fourth switching tube Q3 is connected to the power conversion unit, and the third end of the fourth switching tube Q3 is grounded.
Preferably, the first switching unit includes a manual trigger switch S1;
the first end of the manual trigger switch S1 is connected with the power supply input end, and the second end of the manual trigger switch S1 is connected with the power supply conversion unit and the time delay switch unit.
Preferably, the low standby power consumption power supply circuit of the present invention further includes a third switching unit;
the first end of the third switching unit is connected to the power input end, the second end of the third switching unit is used for connecting a working circuit, the third end of the third switching unit is connected to the power conversion unit and the controller module, wherein the third switching unit is used for being switched on when the controller module outputs a third control level and being switched off when the controller module outputs a fourth control level.
Preferably, the third switch unit comprises a relay switch RLY1, a first pin of the relay switch RLY1 is connected with the controller module, a second pin of the relay switch RLY1 is connected with the power conversion unit, a third pin of the relay switch RLY1 is connected with the power input terminal, and a fourth pin of the relay switch RLY1 is used for connecting with the working circuit.
In addition, the invention also provides an electronic device which comprises the power supply circuit with low standby power consumption.
The low standby power consumption power supply circuit and the electronic equipment have the following beneficial effects that: the standby power consumption of the equipment can be reduced, and the standby power consumption level of the whole machine is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a logic block diagram of an embodiment of a low standby power supply circuit of the present invention;
FIG. 2 is a schematic circuit diagram of an embodiment of a low standby power supply circuit of the present invention;
fig. 3 is a logic block diagram of another embodiment of a low standby power supply circuit according to the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of the power supply circuit with low standby power consumption of the present invention, the power supply circuit includes: the power supply comprises a power supply input end 110, a delay switch unit 150, a power supply conversion unit 130, a controller module 140, a first switch unit 120 and a second switch unit 170; the first switch unit 120 is connected to the power input terminal 110, the power conversion unit 130 and the delay switch unit 150, and configured to supply power to the power conversion unit 130 and the delay switch unit 150 when being triggered to be turned on, where the delay switch unit 150 is configured to be turned on when being powered on and turned off after being powered on for a preset time; the power conversion unit 130 is connected to the delay switch unit 150 and the controller module 140, and is configured to output a power supply voltage to the controller module 140 when the delay switch unit 150 is in a conducting state, so as to power on the controller module 140; the second switching unit 170 is connected to the controller module 140, and is turned on when the controller module 140 outputs the first control level and turned off when the controller module 140 outputs the second control level; the power conversion unit 130 is further connected to the second switch unit 170, and is configured to maintain the output power supply voltage when the second switch unit 170 is in the on state, and stop outputting the power supply voltage when both the second switch unit 170 and the delay switch unit 150 are in the off state. Specifically, the power input terminal 110 is used to connect to a power source, which may be a battery pack. The power input terminal 110 may be connected to a first terminal of the first switch unit 120, and after the first switch unit 120 is activated, power is output through the power input terminal 110 and the first switch unit 120 to power the power conversion unit 130 and the delay switch unit 150. The power conversion unit 130 and the delay switch unit 150 may be connected to the second terminal of the first switch unit 120. The delay switch unit 150 is initially powered on and is turned off after a period of time, i.e., a preset duration. When the delay switch unit 150 is turned on, the power conversion unit 130 starts to perform voltage conversion on the input voltage thereof to obtain an output voltage, and the controller module 140 is powered on to start operating by the output voltage. When the controller module 140 is powered on, it may output a first control level to trigger the second switch unit 170 to turn on, and output a second control level to trigger the second switch unit 170 to turn off. When the controller module 140 outputs the first control level to control the second switch unit 170 to be turned on, the power conversion unit 130 maintains the operating state of the turned-on second switch unit 170, and at this time, even if the delay switch unit 150 is turned off after a delay, the voltage output can be maintained, i.e., the voltage output is maintained to be output to ensure the controller module 140 to operate, so as to finally maintain the normal operation of the power supply circuit. It can be understood that when the delay switch unit 150 enters the off state after being delayed, the operating state of the power conversion unit 130 will be completely controlled by the controller module 140. For example, when the power supply circuit is to be set to the standby state, the second switching unit 170 may be turned off by the controller module 140 outputting the second control level to finally turn off the output of the power conversion unit 130, so that the power supply circuit enters the standby state. At this time, to recover the power supply from the standby state, the first switch unit 120 needs to be triggered again, so that the delay switch unit 150 is powered on again to enable the controller module 140 to enter the operating state. In one embodiment, the delay time is typically several hundred milliseconds, which can be set to a reasonable delay time for the delay switch unit 150. The controller module 140 may be formed by a general MCU chip.
As shown in fig. 2, in an embodiment, the delay switch unit 150 includes a voltage stabilizing unit 151, a delay unit 152, and a switch driving unit 153; the first end of the voltage stabilizing unit 151 is connected to the first switch unit 120, the second end of the voltage stabilizing unit 151 is connected to the first end of the delay unit 152, the third end of the voltage stabilizing unit 151 is grounded, the second end of the delay unit 152 is connected to the first end of the switch driving unit 153, the second end of the switch driving unit 153 is connected to the first switch unit 120, and the third end of the switch driving unit 153 is connected to the power conversion unit 130. Specifically, the delay unit 152 is configured to delay and output a corresponding level signal, which may be specifically a first level output at the initial power-on time, and output a second level after delaying for a period of time, where the switch driving unit 153 is turned on when receiving the first level output by the delay unit 152, and is turned off when receiving the second level output by the delay unit 152. The delay switch unit 150 is turned on and off according to the on state of the switch driving unit 153. The voltage stabilizing unit 151 is used to provide a stable power supply voltage for the delay unit 152.
Optionally, the delay unit 152 includes a reset chip U2; the second terminal of the voltage stabilizing unit 151 is connected to the third pin of the reset chip U2, the second pin of the reset chip U2 is connected to the first terminal of the switch driving unit 153, and the first pin of the reset chip U2 is grounded. Specifically, the delay unit 152 may adopt a reset chip U2, wherein a power supply pin of the reset chip U2, i.e. a third pin, provides a stable power supply voltage through a voltage stabilizing unit 151, wherein the voltage stabilizing unit 151 is connected to the first switch unit 120, and stabilizes the output voltage of the first switch unit 120 to obtain the working voltage required by the reset chip U2. It can also be understood that the output voltage is regulated by the voltage regulation unit 151 so that the output voltage is maintained in the operating voltage range of the reset chip U2. The output pin, i.e. the second pin, of the reset chip U2 is connected to the switch driving unit 153, and the switch driving unit 153 is turned off or turned on according to the output of the reset chip U2. The first pin, the ground pin, of the reset chip U2 is used for ground. In an embodiment, when the reset chip U2 outputs an initial level at an initial power-on stage, the switch driving unit 153 is turned on after receiving the initial level, and the delay switch unit 150 is turned on correspondingly, the reset chip U2 outputs a delay level after delaying for a period of time, and the switch driving unit 153 is turned off after receiving the delay level, and the delay switch unit 150 is turned off correspondingly. Therefore, the power conversion unit 130 operates according to the state of the delay switch unit 150, and it can be understood that the power conversion unit 130 operates according to the on or off of the switch driving unit 153. The reset chip U2 may adopt a chip outputting a low-level reset signal, while selecting a reset IC with low power consumption, such as MAX 809. In another embodiment, the delay unit 152 may generate the delay level by using a D flip-flop or other methods.
Optionally, the voltage stabilizing unit 151 includes a voltage regulator DZ1 and a first resistor R4, a first end of the first resistor R4 is connected to the first switch unit 120, a second end of the first resistor R4 is connected to a cathode of the voltage regulator DZ1 and a first end of the delay unit 152, and an anode of the voltage regulator DZ1 is grounded. Specifically, the delay unit 152 may be powered by a series connection of a first resistor R4 and a voltage regulator DZ1, wherein the output voltage of the first switch unit 120 generates the operating voltage of the delay unit 152 at a series node thereof through the series connection of the first resistor R4 and the voltage regulator DZ 1. It can be understood that when the power supply circuit enters the standby state, the standby power consumption of the delay switch unit 150 affects the standby power consumption of the whole power supply circuit, wherein the regulated current of the first resistor R4 and the voltage regulator DZ1 in the delay switch unit 150 is the key factor affecting the standby power consumption, and therefore, the selection of the first resistor R4 requires the selection of a large-resistance resistor and the selection of a voltage regulator Izt with a small current, which in one embodiment may select MMSSZ468T 1G. In another embodiment, the voltage regulation unit 151 may also be implemented by LDO, DC/DC or other power chips
Optionally, the switch driving unit 153 includes a first sub-switch unit and a second sub-switch unit; the first end of the first sub-switch unit is connected to the second end of the delay unit 152, the second end of the first sub-switch unit is connected to the first switch unit 120, the third end of the first sub-switch unit is connected to the first end of the second sub-switch unit, and the second end of the second sub-switch unit is connected to the power conversion unit. Specifically, the switch driving unit 153 is composed of two switch circuits, wherein the first sub-switch unit is connected to the delay unit 152, and is turned on or off according to the output level of the delay unit 152 to output the corresponding driving level, and the second sub-switch unit is connected to the first sub-switch unit and is used for being turned on or off according to the driving level output by the first sub-switch unit to finally control the power conversion unit 130 to operate.
Optionally, the first sub-switching unit includes: the circuit comprises a first switch tube Q4, a second resistor R6, a third resistor R3 and a fourth resistor R8; the first end of the first switch tube Q4 is connected to the first end of the second resistor R6, the second end of the second resistor R6 is connected to the second end of the delay unit 152, the second end of the first switch tube Q4 is connected to the first end of the third resistor R3, the first end of the fourth resistor R8 and the second sub-switch unit, the second end of the third resistor R3 is connected to the first switch unit 120, the second end of the fourth resistor R8 is grounded, and the third end of the first switch tube Q4 is grounded. Specifically, in the first sub-switching unit, when the reset chip U2 outputs an initial level, the first switching tube Q4 is in an off state, and the output voltage of the first switching unit 120 is divided by the third resistor R3 and the fourth resistor R8 connected in series to generate a voltage at the series connection node thereof to drive the second sub-switching unit to be turned on. When the reset chip U2 outputs a delay level after a period of time, the first switch tube Q4 is in a conducting state, the third resistor R3 is directly grounded, the voltage of the series node of the third resistor R3 and the fourth resistor R8 is almost zero, and the low level drives the second sub-switch unit to turn off. The current flowing through the third resistor R3 is also a key factor in the standby power consumption, and the resistor may be a large-value resistor selected to reduce the flowing current. In an embodiment, the first switch Q4 may be a MOS transistor, a gate of which is connected to the second pin of the reset chip U2 through the second resistor R6, and is turned off when the second pin of the reset chip U2 outputs a low level, i.e., an initial level, and is turned on when the second pin of the reset chip U2 outputs a high level, i.e., a delay level.
Optionally, the second sub-switching unit includes a second switching tube Q2, a first end of the second switching tube Q2 is connected to the first sub-switching unit, a second end of the second switching tube Q2 is connected to the power conversion unit 130, and a third end of the second switching tube Q2 is grounded. Specifically, the process of driving the second sub-switch unit to operate by the output of the first sub-switch unit may be that the second switch Q2 is driven to be turned on or off by the level output by the first sub-switch unit. In an embodiment, the second sub-switch Q2 may be a MOS transistor, and a gate of the MOS transistor is connected to the first sub-switch unit, and is turned on when the first sub-switch unit outputs a high level and turned off when the first sub-switch unit outputs a low level.
Optionally, the power conversion unit 130 includes an enable signal generation unit and a power conversion chip U1; the first end of the enable signal generating unit is connected to the delay switch unit 150 and the second switch unit 170, the second end of the enable signal generating unit is connected to the input end of the power conversion chip U1, the third end of the enable signal generating unit is connected to the enable end of the power conversion chip U1, the input end of the power conversion chip U1 is connected to the first switch unit 120, and the output end of the power conversion chip U1 is connected to the controller module 140. Specifically, in the power conversion unit 130, the delay switch unit 150 and the second switch unit 170 drive the enable signal generation unit to operate to generate the enable level to drive the power conversion chip U1 to operate. The enable signal generating unit outputs an enable signal to enable the power conversion chip U1 to output a voltage when the delay switch unit 150 or the second switch unit 170 is turned on, and drives the enable signal generating unit to operate to turn off an enable level to enable the power conversion chip U1 to turn off the power output only when the delay switch unit 150 and the second switch unit 170 are turned off at the same time. The power conversion chip U1 is also the key to influence the standby power consumption, so it can select the DC/DC chip with low power consumption, for example, it can select MP2565 DN.
Optionally, the enable signal generating unit includes a third switching tube Q1, a fifth resistor R1, a sixth resistor R2, a seventh resistor R5 and an eighth resistor R9; a first end of the third switching tube Q1 is connected to a first end of the fifth resistor R1 and a first end of the sixth resistor R2, a second end of the fifth resistor R1 is connected to the first switching unit 120, a second end of the sixth resistor R2 is connected to the delay switching unit 150 and the second switching unit 170, a second end of the third switching tube Q1 is connected to a first end of the seventh resistor R5, a second end of the seventh resistor R5 is connected to an enable end of the power conversion chip U1 and a first end of the eighth resistor R9, a second end of the eighth resistor R9 is grounded, and a third end of the third switching tube Q1 is connected to the first switching unit 120. Specifically, when the delay switch unit 150 or the second switch unit 170 is turned on, the fifth resistor R1 and the sixth resistor R2 form a series connection loop in the enable signal generating unit, the output voltage of the first switch unit 120 generates a divided voltage at the series connection node of the fifth resistor R1 and the sixth resistor R2, the third switch tube Q1 is driven to be turned on by the divided voltage, the output voltage of the first switch unit 120 simultaneously generates a divided voltage at the series connection node of the seventh resistor R5 and the eighth resistor R9 connected in series through the turned-on third switch tube Q1, and the power conversion chip U1 is driven to operate by the divided voltage. In an embodiment, the third switching transistor Q1 may be a MOS transistor, a gate of the MOS transistor is connected to a series node of the fifth resistor R1 and the sixth resistor R2, a source of the MOS transistor is connected to the first switching unit 120, and a drain of the MOS transistor is connected to the enable terminal of the power conversion chip U1 through the seventh resistor R5.
Optionally, the second switching unit 170 includes a fourth switching tube Q3 and a ninth resistor R7; a first end of a fourth switching tube Q3 is connected to a first end of a ninth resistor R7, a second end of the ninth resistor R7 is connected to the controller module 140, a second end of the fourth switching tube Q3 is connected to the power conversion unit 130, and a third end of the fourth switching tube Q3 is grounded; specifically, in the second switching unit 170, a first end of the fourth switching transistor Q3 is connected to the controller module 140 through a ninth resistor R7, and the fourth switching transistor Q3 is controlled to be turned on or off by the first control level or the second control level output by the controller module 140. In an embodiment, the fourth switching transistor Q3 may be a MOS transistor, wherein a gate of the MOS transistor is connected to the controller module 140. In an embodiment, the fourth switching transistor Q3 may be a MOS transistor, and a gate of the MOS transistor is connected to the controller block 140 through a ninth resistor R7, and is turned on when the controller block 140 outputs a high level, i.e., the first control level, and is turned off when the controller block 140 outputs a low level, i.e., the second control level.
Optionally, the first switching unit 120 includes a manual trigger switch S1; the first terminal of the manual trigger switch S1 is connected to the power input terminal 110, and the second terminal of the manual trigger switch S1 is connected to the power conversion unit 130 and the delay switch unit 150. Specifically, the first switch unit 120 employs a manual trigger switch S1 such as a key switch, a rotary switch, or the like, and is activated by manual triggering to power on the power supply circuit.
As shown in fig. 2 and 3, in an embodiment, the low standby power supply circuit of the present invention further includes a third switching unit 180; the first end of the third switching unit 180 is connected to the power input terminal 110, the second end of the third switching unit 180 is used for connecting to a working circuit 200, and the third end of the third switching unit 180 is connected to the power conversion unit 130 and the controller module 140, wherein the third switching unit 180 is used for being turned on when the controller module 140 outputs the third control level and being turned off when the controller module 140 outputs the fourth control level. Specifically, the third switching unit 180 is connected to the working circuit 200 of the device, and the controller module 140 controls the third switching unit 180 to turn on or off, when the third switching unit 180 is turned on, the power input of the power input terminal 110 may supply power to the following working circuit 200 through the turned-on third switching unit 180, and when the third switching unit 180 is turned off, the power supply of the power input terminal 110 to the following working circuit 200 may be cut off, so as to implement the power supply control of the working circuit 200 through the controller module 140.
Optionally, the third switching unit 180 includes a relay switch RLY1, a first pin of the relay switch RLY1 is connected to the controller module 140, a second pin of the relay switch RLY1 is connected to the power conversion unit 130, a third pin of the relay switch RLY1 is connected to the power input terminal 110, and a fourth pin of the relay switch RLY1 is used for connecting the operating circuit 200. Specifically, the third switching unit 180 may employ a relay switch RLY1, and a coil of the relay switch RLY1 may be controlled to be powered up or powered down through the controller module 140 to finally control the contacts of the relay switch RLY1 to be opened or closed.
In addition, the electronic equipment of the invention comprises the power supply circuit with low standby power consumption, and the standby power consumption of the whole electronic equipment is reduced through the power supply circuit.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims (13)

1. A low standby power supply circuit, comprising: the power supply switching device comprises a power supply input end, a delay switch unit, a power supply conversion unit, a controller module, a first switch unit and a second switch unit;
the first switch unit is connected with the power input end, the power conversion unit and the delay switch unit and used for supplying power to the power conversion unit and the delay switch unit when the first switch unit is triggered to be switched on, wherein the delay switch unit is configured to be switched on when being powered on and switched off after being powered on for a preset time;
the power supply conversion unit is connected with the delay switch unit and the controller module and is used for outputting power supply voltage to the controller module when the delay switch unit is in a conducting state so as to enable the controller module to be electrified and operated;
the second switch unit is connected with the controller module and is used for being switched on when the controller module outputs a first control level and being switched off when the controller module outputs a second control level;
the power supply conversion unit is further connected with the second switch unit and used for maintaining and outputting the power supply voltage when the second switch unit is in a conducting state and stopping outputting the power supply voltage when the second switch unit and the delay switch unit are in a turn-off state.
2. The power supply circuit with low standby power consumption of claim 1, wherein the delay switch unit comprises a voltage stabilizing unit, a delay unit and a switch driving unit;
the first end of the voltage stabilizing unit is connected with the first switch unit, the second end of the voltage stabilizing unit is connected with the first end of the delay unit, the third end of the voltage stabilizing unit is grounded, the second end of the delay unit is connected with the first end of the switch driving unit, the second end of the switch driving unit is connected with the first switch unit, and the third end of the switch driving unit is connected with the power supply conversion unit.
3. The low standby power consumption power supply circuit according to claim 2,
the delay unit comprises a reset chip U2; the second end of the voltage stabilizing unit is connected with the third pin of the reset chip U2, the second pin of the reset chip U2 is connected with the first end of the switch driving unit, and the first pin of the reset chip U2 is grounded; and/or
The voltage stabilizing unit comprises a voltage stabilizing tube DZ1 and a first resistor R4, the first end of the first resistor R4 is connected with the first switch unit, the second end of the first resistor R4 is connected with the cathode of the voltage stabilizing tube DZ1 and the first end of the time delay unit, and the anode of the voltage stabilizing tube DZ1 is grounded.
4. The power supply circuit with low standby power consumption according to claim 2, wherein the switch driving unit comprises a first sub-switch unit and a second sub-switch unit;
the first end of the first sub-switch unit is connected with the second end of the delay unit, the second end of the first sub-switch unit is connected with the first switch unit, the third end of the first sub-switch unit is connected with the first end of the second sub-switch unit, and the second end of the second sub-switch unit is connected with the power supply conversion unit.
5. The power supply circuit with low standby power consumption of claim 4, wherein the first sub-switch unit comprises: the circuit comprises a first switch tube Q4, a second resistor R6, a third resistor R3 and a fourth resistor R8;
the first end of the first switch tube Q4 is connected to the first end of the second resistor R6, the second end of the second resistor R6 is connected to the second end of the delay unit, the second end of the first switch tube Q4 is connected to the first end of the third resistor R3, the first end of the fourth resistor R8 and the second sub-switch unit, the second end of the third resistor R3 is connected to the first switch unit, the second end of the fourth resistor R8 is grounded, and the third end of the first switch tube Q4 is grounded.
6. The power supply circuit with low standby power consumption as claimed in claim 4, wherein the second sub-switching unit comprises a second switching tube Q2, a first end of the second switching tube Q2 is connected to the first sub-switching unit, a second end of the second switching tube Q2 is connected to the power conversion unit, and a third end of the second switching tube Q2 is grounded.
7. The power supply circuit with low standby power consumption as claimed in claim 1, wherein the power conversion unit comprises an enable signal generation unit and a power conversion chip U1;
the first end of the enabling signal generating unit is connected with the time delay switch unit and the second switch unit, the second end of the enabling signal generating unit is connected with the input end of the power supply conversion chip U1, the third end of the enabling signal generating unit is connected with the enabling end of the power supply conversion chip U1, the input end of the power supply conversion chip U1 is connected with the first switch unit, and the output end of the power supply conversion chip U1 is connected with the controller module.
8. The power supply circuit with low standby power consumption of claim 7, wherein the enable signal generating unit comprises a third switching tube Q1, a fifth resistor R1, a sixth resistor R2, a seventh resistor R5 and an eighth resistor R9;
a first end of the third switching tube Q1 is connected to a first end of the fifth resistor R1 and a first end of the sixth resistor R2, a second end of the fifth resistor R1 is connected to the first switching unit, a second end of the sixth resistor R2 is connected to the second switching unit and the delay switching unit, a second end of the third switching tube Q1 is connected to a first end of the seventh resistor R5, a second end of the seventh resistor R5 is connected to an enable end of the power conversion chip U1 and a first end of the eighth resistor R9, a second end of the eighth resistor R9 is grounded, and a third end of the third switching tube Q1 is connected to the first switching unit.
9. The power supply circuit with low standby power consumption of claim 1, wherein the second switch unit comprises a fourth switch tube Q3 and a ninth resistor R7;
the first end of the fourth switching tube Q3 is connected to the first end of the ninth resistor R7, the second end of the ninth resistor R7 is connected to the controller module, the second end of the fourth switching tube Q3 is connected to the power conversion unit, and the third end of the fourth switching tube Q3 is grounded.
10. The power supply circuit with low standby power consumption of claim 1, wherein said first switch unit comprises a manually activated switch S1;
the first end of the manual trigger switch S1 is connected with the power supply input end, and the second end of the manual trigger switch S1 is connected with the power supply conversion unit and the time delay switch unit.
11. The low standby power consumption power supply circuit according to claim 1, further comprising a third switching unit;
the first end of the third switching unit is connected to the power input end, the second end of the third switching unit is used for connecting a working circuit, the third end of the third switching unit is connected to the power conversion unit and the controller module, wherein the third switching unit is used for being switched on when the controller module outputs a third control level and being switched off when the controller module outputs a fourth control level.
12. The power supply circuit with low standby power consumption as claimed in claim 11, wherein the third switching unit comprises a relay switch RLY1, a first pin of the relay switch RLY1 is connected to the controller module, a second pin of the relay switch RLY1 is connected to the power conversion unit, a third pin of the relay switch RLY1 is connected to the power input, and a fourth pin of the relay switch RLY1 is used for connecting the working circuit.
13. An electronic device, characterized in that it comprises a low standby power consumption supply circuit according to any one of claims 1 to 12.
CN202110419764.4A 2021-04-19 2021-04-19 Low standby power consumption power supply circuit and electronic equipment Pending CN113206522A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110419764.4A CN113206522A (en) 2021-04-19 2021-04-19 Low standby power consumption power supply circuit and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110419764.4A CN113206522A (en) 2021-04-19 2021-04-19 Low standby power consumption power supply circuit and electronic equipment

Publications (1)

Publication Number Publication Date
CN113206522A true CN113206522A (en) 2021-08-03

Family

ID=77027480

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110419764.4A Pending CN113206522A (en) 2021-04-19 2021-04-19 Low standby power consumption power supply circuit and electronic equipment

Country Status (1)

Country Link
CN (1) CN113206522A (en)

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