CN219458659U - Zero standby power consumption switching power supply control circuit - Google Patents
Zero standby power consumption switching power supply control circuit Download PDFInfo
- Publication number
- CN219458659U CN219458659U CN202320473248.4U CN202320473248U CN219458659U CN 219458659 U CN219458659 U CN 219458659U CN 202320473248 U CN202320473248 U CN 202320473248U CN 219458659 U CN219458659 U CN 219458659U
- Authority
- CN
- China
- Prior art keywords
- module
- resistor
- switching
- switch
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Abstract
The utility model relates to the technical field of power output control, and provides a switching power supply control circuit with zero standby power consumption. According to the utility model, based on the standby requirement of zero power consumption of the circuit, the starting module is set for starting control, when the power is required to be turned off, the closing module is controlled to turn off the drive of the switching module, so that the active power off of the circuit is realized, the real standby zero power consumption is realized, and the service life of the battery can be further prolonged especially for electronic devices powered by adopting the battery as an energy source.
Description
Technical Field
The utility model relates to the technical field of power output control, in particular to a switching power supply control circuit with zero standby power consumption.
Background
At present, small equipment powered by batteries is commonly used as a power switch by a toggle switch, and a switch circuit for performing low-power-consumption state control by a tact switch connected with an MCU is also used.
That is, a circuit using a tact switch as a power switch of a device currently has the following technical problems:
(1) If the toggle switch is adopted as a power switch of the equipment, the equipment cannot be powered off actively after the switch is communicated;
(2) If the light touch switch is adopted to turn off the power supply of the equipment, the thermal turn-off is generally only realized, namely, the battery is still connected with the load, and is only in a low-power standby state, a certain quiescent current still exists, the long-time standby still consumes the electric quantity of the photocell, namely, the MCU can not completely turn off the power supply. Or, after the MCU turns off the power supply completely, the device cannot be turned on again by touching the switch.
Disclosure of Invention
The utility model provides a switching power supply control circuit with zero standby power consumption, which solves the technical problem that the existing switching circuit cannot realize active power failure or cannot completely power failure so as to realize zero standby power consumption.
In order to solve the technical problems, the utility model provides a switching power supply control circuit with zero standby power consumption, which comprises a starting module, a switching module and a closing module, wherein the starting module is connected with a battery output end, a driving end of the switching module and a control end of the closing module, an input end of the closing module is connected with an output end or a signal input end of the switching module, and an output end of the switching module is used as a power supply output end to be connected with a load.
The basic scheme is based on the standby requirement of zero power consumption of the circuit, the starting module is set for starting control, when the power is required to be turned off, the closing module is controlled to turn off the drive of the switch module, the active power off of the circuit is realized, the real standby zero power consumption is further realized, and particularly, for an electronic device adopting a battery as an energy source for power supply, the service life of the battery can be further prolonged.
In a further embodiment, the starting module comprises a first resistor and a tact switch, wherein one end of the tact switch is connected with the output end of the battery through the first resistor, and the other end of the tact switch is grounded; one end of the tact switch is also connected with the driving end of the switch module and the control end of the closing module.
The scheme adopts the tact switch as a starting switch of the switch power supply output, and the hardware key activation mechanism is adopted, so that the standby power consumption is zero after the system is shut down, the system is shut down under software control and is not forced to be powered off, and the system can be shut down after entering a safe state.
In a further embodiment, the switch module includes a first switch tube, a second switch tube, a third switch tube, and second to fifth resistors, and when the first switch tube is a PNP triode, the second switch tube is an NPN triode, and the third switch tube is a P-channel MOS tube:
the base electrode of the first switch tube is connected with the starting module through the second resistor serving as a driving end, the emitter electrode of the first switch tube is connected with the output end of the battery, and the collector electrode of the first switch tube is grounded through a third resistor; the base electrode of the second switching tube is connected with the collector electrode of the first switching tube through a fourth resistor, the emitter electrode is grounded, and the collector electrode is connected with the grid electrode of the third switching tube; the source electrode of the third switching tube is connected with the output end of the battery, and the drain electrode is used as the output end to be connected with the input end of the closing module; and two ends of the fifth resistor are respectively connected with the source electrode and the grid electrode of the third switching tube.
On one hand, the MOS tube of the P channel is arranged as a switch for main output and return, so that the requirement of high-current output protection can be met; on the other hand, a two-stage driving circuit is designed according to the first switching tube and the second switching tube so as to drive the on and off of the third switching tube.
In a further embodiment, the closing module comprises a pulse control module and an under-voltage protection module which are electrically connected, wherein the pulse control module is connected with the starting module and the driving end of the switching module, and the under-voltage protection module is connected with the power output end; the pulse control module comprises a fourth switching tube and a sixth resistor, and when the fourth switching tube is an NPN triode:
and the collector electrode of the fourth switching tube is used as a control end to be connected with the starting module and the driving end of the switching module, the emitter electrode is grounded, and the base electrode is connected with the signal input end through the sixth resistor.
The input end of the switch module is connected with the closing module connected with the MCU, the MCU is used for controlling the fourth switch tube to be turned on or off, so that the base voltage of the first switch tube is lowered, the switch module is controlled to be turned off, and the power output circuit is turned off.
In a further embodiment, the under-voltage protection module comprises a seventh resistor and an eighth resistor, wherein one end of the seventh resistor is connected with the output end of the switch module, and the other end of the seventh resistor is connected with the base electrode of the fourth switch tube; one end of the eighth resistor is connected with the base electrode of the fourth switching tube, and the other end of the eighth resistor is grounded.
According to the scheme, the feedback pin is connected to the undervoltage protection module at the power output end (namely the output end of the switch module), the undervoltage protection threshold value is set by utilizing the voltage division of the seventh resistor and the eighth resistor, and when the voltage fed back by the feedback pin is lower than the threshold value, the fourth switch tube is not conducted, the circuit does not work, so that the undervoltage protection of the MCU-free circuit is realized, and the compatibility of different devices (including devices not including a control chip) is realized.
In a further embodiment, the signal input terminal is a pulse output terminal of a control chip, and the control chip is an MCU.
Drawings
Fig. 1 is a system frame diagram of a switching power supply control circuit with zero standby power consumption according to an embodiment of the present utility model;
FIG. 2 is a circuit diagram of the hardware of FIG. 1 provided by an embodiment of the present utility model;
wherein: the device comprises a starting module 1, a switching module 2, a pulse control module 3 and an under-voltage protection module 4; first to fourth switching tubes Q1 to Q4; the first resistor R1 to the eighth resistor R8, the touch switch SW1, the battery J1, the battery output terminal BAT+, the power output terminal BAT-OUT and the signal input terminal PWR-CRL.
Detailed Description
The following examples are given for the purpose of illustration only and are not to be construed as limiting the utility model, including the drawings for reference and description only, and are not to be construed as limiting the scope of the utility model as many variations thereof are possible without departing from the spirit and scope of the utility model.
In the embodiment of the utility model, as shown in fig. 1, the switching power supply control circuit with zero standby power consumption comprises a starting module 1, a switching module 2 and a closing module, wherein the starting module 1 is connected with a battery output end bat+, a driving end of the switching module 2 and a control end of the closing module, an input end of the closing module is connected with an output end or a signal input end PWR-CRL of the switching module 2, and an output end of the switching module 2 is used as a power supply output end BAT-OUT to be connected with a load.
Wherein, battery output BAT+ is connected with battery J1 positive pole.
In this embodiment, the starting module 1 includes a first resistor R1 and a touch switch SW1, one end of the touch switch SW1 is connected to the battery output terminal bat+ through the first resistor R1, and the other end is grounded; one end of the tact switch SW1 is also connected to the driving end of the switch module 2 and the control end of the closing module.
In the embodiment, the touch switch SW1 is adopted as a starting switch of the switch power supply output, and the hardware key activation mechanism is adopted, so that the standby power consumption is zero after the system is shut down, the system is shut down after the system is in a safe state because the system is shut down under software control and is not forcibly powered down.
In this embodiment, the switch module 2 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, and second to fifth resistors R2 to R5, and when the first switch tube Q1 is a PNP transistor, the second switch tube Q2 is an NPN transistor, and the third switch tube Q3 is a P-channel MOS transistor:
the base electrode of the first switching tube Q1 is connected with the starting module 1 through the second resistor R2 serving as a driving end, the emitter electrode is connected with the battery output end BAT+, and the collector electrode is grounded through the third resistor R3; the base electrode of the second switching tube Q2 is connected with the collector electrode of the first switching tube Q1 through a fourth resistor R4, the emitter electrode is grounded, and the collector electrode is connected with the grid electrode of the third switching tube Q3; the source electrode of the third switching tube Q3 is connected with the battery output end BAT+, and the drain electrode is connected with the input end of the closing module as an output end; both ends of the fifth resistor R5 are respectively connected with the source electrode and the grid electrode of the third switching tube Q3.
On one hand, the MOS tube of the P channel is arranged as a switch for main output and return, so that the requirement of high-current output protection can be met; on the other hand, a two-stage driving circuit is designed according to the first switching tube Q1 and the second switching tube Q2 so as to drive the on and off of the third switching tube Q3.
In this embodiment, the closing module includes a pulse control module 3 and an under-voltage protection module 4 that are electrically connected, the pulse control module 3 is connected with the driving ends of the starting module 1 and the switching module 2, and the under-voltage protection module 4 is connected with the power output terminal BAT-OUT; the pulse control module 3 includes a fourth switching tube Q4 and a sixth resistor R6, and when the fourth switching tube Q4 is an NPN triode:
the collector electrode of the fourth switching tube Q4 is used as a control end to be connected with the driving ends of the starting module 1 and the switching module 2, the emitter electrode is grounded, and the base electrode is connected with the signal input end PWR-CRL through a sixth resistor R6.
In this embodiment, the input end of the switch module 2 is connected to a shutdown module connected to the MCU, and the MCU controls whether the fourth switch tube Q4 is turned on or not, so as to lower the base voltage of the first switch tube Q1, and further control the switch module 2 to be turned off, so as to realize the turn-off of the power output circuit.
In this embodiment, the under-voltage protection module 4 includes a seventh resistor R7 and an eighth resistor R8, where one end of the seventh resistor R7 is connected to the output end of the switch module 2, and the other end is connected to the base of the fourth switch tube Q4; one end of the eighth resistor R8 is connected with the base electrode of the fourth switching tube Q4, and the other end of the eighth resistor R8 is grounded.
In this embodiment, the feedback pin is connected to the under-voltage protection module 4 at the power output terminal BAT-OUT (i.e., the output terminal of the switch module 2), the under-voltage protection threshold is set by using the partial voltages of the seventh resistor R7 and the eighth resistor R8, and when the voltage fed back by the feedback pin is lower than the threshold, the fourth switch tube Q4 is not turned on, and the circuit does not work, so as to realize under-voltage protection of the MCU-free circuit, and realize compatibility of different devices (devices including and not including a control chip).
In this embodiment, the signal input terminal PWR-CRL is a pulse output terminal of a control chip, and the control chip is an MCU.
The power output shutdown principle of this embodiment is as follows:
the touch switch SW1 is pressed down, so that current passes through the first resistor R1, the base potential of the second switching tube Q2 is pulled down, and then the first switching tube Q1, the second switching tube Q2 and the third switching tube Q3 are sequentially conducted.
At this time, if the signal input terminal PWR-CRL is connected to the MCU, the MCU outputs a continuous high level from the signal input terminal PWR-CRL, the fourth switching tube Q4 is continuously turned on, and the base potential of the second switching tube Q2 is pulled down, so that the power output terminal BAT-OUT is stably output.
Similarly, at this time, the control MC outputs a low level from the signal input terminal PWR-CRLU, and then the fourth switching tube Q4 is turned off, so that the first switching tube Q1, the second switching tube Q2 and the third switching tube Q3 are turned off in sequence, and no circuit exists between the positive electrode of the battery J1 and the ground, thereby realizing zero power consumption standby.
The undervoltage protection principle of this embodiment is as follows:
when the MCU is not included in the device, i.e. if the signal input terminal PWR-CRL is limited, the power output terminal BAT-OUT is continuously grounded through the seventh resistor R7 and the eighth resistor R8.
At this time, if the voltage of the output voltage divided by the eighth resistor R8 is lower than the conducting voltage of the fourth switching tube Q4 (i.e., lower than the undervoltage protection threshold), the fourth switching tube Q4 is not turned on, and the circuit does not work, so as to realize the undervoltage protection of the MCU-free circuit.
According to the embodiment of the utility model, the starting module 1 is set to start up and control based on the standby requirement of zero power consumption of the circuit, when the shutdown and outage are needed, the closing module is controlled to shut off the drive of the switch module 2, the active outage of the circuit is realized, the real standby zero power consumption is further realized, and especially for the electronic device adopting the battery as the energy source to supply power, the service life of the battery can be further prolonged.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (6)
1. A switching power supply control circuit with zero standby power consumption is characterized in that: the power supply comprises a starting module, a switch module and a closing module, wherein the starting module is connected with a battery output end, a driving end of the switch module and a control end of the closing module, an input end of the closing module is connected with an output end or a signal input end of the switch module, and an output end of the switch module is used as a power supply output end to be connected with a load.
2. The switching power supply control circuit of claim 1, wherein the switching power supply control circuit has zero standby power consumption, and is characterized in that: the starting module comprises a first resistor and a tact switch, wherein one end of the tact switch is connected with the output end of the battery through the first resistor, and the other end of the tact switch is grounded; one end of the tact switch is also connected with the driving end of the switch module and the control end of the closing module.
3. The switching power supply control circuit with zero standby power consumption according to claim 2, wherein the switching module comprises a first switching tube, a second switching tube, a third switching tube and second to fifth resistors, and when the first switching tube is a PNP triode, the second switching tube is an NPN triode and the third switching tube is a P-channel MOS tube:
the base electrode of the first switch tube is connected with the starting module through the second resistor serving as a driving end, the emitter electrode of the first switch tube is connected with the output end of the battery, and the collector electrode of the first switch tube is grounded through a third resistor; the base electrode of the second switching tube is connected with the collector electrode of the first switching tube through a fourth resistor, the emitter electrode is grounded, and the collector electrode is connected with the grid electrode of the third switching tube; the source electrode of the third switching tube is connected with the output end of the battery, and the drain electrode is used as the output end to be connected with the input end of the closing module; and two ends of the fifth resistor are respectively connected with the source electrode and the grid electrode of the third switching tube.
4. The switching power supply control circuit with zero standby power consumption according to claim 1, wherein the closing module comprises a pulse control module and an under-voltage protection module which are electrically connected, the pulse control module is connected with the starting module and the driving end of the switching module, and the under-voltage protection module is connected with the power supply output end; the pulse control module comprises a fourth switching tube and a sixth resistor, and when the fourth switching tube is an NPN triode:
and the collector electrode of the fourth switching tube is used as a control end to be connected with the starting module and the driving end of the switching module, the emitter electrode is grounded, and the base electrode is connected with the signal input end through the sixth resistor.
5. The switching power supply control circuit of claim 4, wherein the switching power supply control circuit has zero standby power consumption, and is characterized in that: the under-voltage protection module comprises a seventh resistor and an eighth resistor, one end of the seventh resistor is connected with the output end of the switch module, and the other end of the seventh resistor is connected with the base electrode of the fourth switch tube; one end of the eighth resistor is connected with the base electrode of the fourth switching tube, and the other end of the eighth resistor is grounded.
6. The switching power supply control circuit of claim 1, wherein the switching power supply control circuit has zero standby power consumption, and is characterized in that: the signal input end is a pulse output end of a control chip, and the control chip is an MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320473248.4U CN219458659U (en) | 2023-03-13 | 2023-03-13 | Zero standby power consumption switching power supply control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320473248.4U CN219458659U (en) | 2023-03-13 | 2023-03-13 | Zero standby power consumption switching power supply control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219458659U true CN219458659U (en) | 2023-08-01 |
Family
ID=87411541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320473248.4U Active CN219458659U (en) | 2023-03-13 | 2023-03-13 | Zero standby power consumption switching power supply control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219458659U (en) |
-
2023
- 2023-03-13 CN CN202320473248.4U patent/CN219458659U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210780130U (en) | Power-off control circuit | |
| WO2021258366A1 (en) | Control circuit, battery management system and electrochemical device | |
| CN219458659U (en) | Zero standby power consumption switching power supply control circuit | |
| CN214174876U (en) | Single-key startup and shutdown circuit | |
| CN211959179U (en) | Isolation driving electronic switch module | |
| CN212726976U (en) | Display outage system and display | |
| CN109286237B (en) | Circuit for controlling low-power-consumption backup battery to be connected or disconnected | |
| CN219778495U (en) | Circuit for reducing standby power consumption | |
| CN220325296U (en) | Power-on and power-off management circuit for controlling battery output | |
| CN201867606U (en) | Switch circuit | |
| CN215185914U (en) | Standby zero-power-consumption circuit applied to battery power supply equipment | |
| CN201467324U (en) | Low power consumption CPU standby commutation circuit | |
| CN112003364B (en) | Standby power module and server power supply | |
| CN219458699U (en) | Low power consumption circuit of battery powered device | |
| CN216016467U (en) | Low-voltage protection circuit, device and electrical equipment | |
| CN219498950U (en) | Battery low voltage protection circuit and PCB board | |
| CN212992000U (en) | Battery power supply control circuit | |
| CN219678441U (en) | Startup and shutdown control circuit and electronic equipment | |
| CN216929991U (en) | Power switch self-locking circuit | |
| CN220067213U (en) | Power switch control circuit for direct-current charger and direct-current charger | |
| CN217767226U (en) | Standby control circuit and device | |
| CN214506541U (en) | Battery over-discharge protection circuit and power supply device | |
| CN219322135U (en) | Low-power consumption power supply control circuit and electric equipment | |
| CN219087119U (en) | Low-power-consumption switching circuit and device | |
| CN216721005U (en) | Multi-power supply switching circuit and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |