CN205453657U - Startup/shutdown circuit - Google Patents
Startup/shutdown circuit Download PDFInfo
- Publication number
- CN205453657U CN205453657U CN201620194660.2U CN201620194660U CN205453657U CN 205453657 U CN205453657 U CN 205453657U CN 201620194660 U CN201620194660 U CN 201620194660U CN 205453657 U CN205453657 U CN 205453657U
- Authority
- CN
- China
- Prior art keywords
- circuit
- input
- resistance
- control chip
- switching
- 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
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model relates to a startup/shutdown circuit has solved the not enough of prior art, and technical scheme is: LDO power supply circuit's output is connected with ON -OFF control circuit's input electricity, ON -OFF control circuit's the first output and the first input end of logic or arithmetic circuit are connected, ON -OFF control circuit's first output still is connected with mouthful electricity that resets of opening the power -off control chip through reset circuit, ON -OFF control circuit's a second output and an input -output ports electricity opening the power -off control chip are connected, the second input and an input -output ports who opens the power -off control chip of logic or arithmetic circuit are connected, the output list and the DC of logic or arithmetic circuit DC power supply circuit's messenger can hold the connection, DC DC power supply circuit's output is connected with the power mouth of opening the power -off control chip with reset circuit's power end respectively, indicator lamp circuit's input and buzzer circuit's control end all are connected with an input -output ports electricity opening the power -off control chip.
Description
Technical field
This utility model relates to a kind of Medical Instruments, particularly to a kind of on/off circuit.
Background technology
In a lot of electronic products, a kind of conventional power on-off modes is achieved in that switching on and shutting down control chip is constantly in duty, the action of continual monitoring switch machine button, when switching on and shutting down button triggers, performs start or shutdown command.This conventional power on-off modes, for some portable battery supply sets, when equipment is in off-mode, due to switching on and shutting down control chip still in work, inevitably to consume the capacity of a part of battery.This portion capacity seems insignificant, but in actual applications, is but one of key factor affecting battery life.Meanwhile, when most of similar devices use this power on-off modes, this portion of energy that start detection is consumed, cannot ignore.In the today advocating energy-conserving and environment-protective, design a kind of more excellent method for start-up and shutdown, be possible not only to avoid this meaningless wasting of resources, and for battery, be also necessary.
Utility model content
The purpose of this utility model is to solve above-mentioned prior art and exists due to switching on and shutting down control chip still in work, the problem inevitably consuming the capacity of a part of battery, it is provided that a kind of can avoid this meaningless wasting of resources on/off circuit.
nullThis utility model solves its technical problem and be the technical scheme is that a kind of on/off circuit，Powered by device battery，Including LDO power circuit、Logic or computing circuit、ON-OFF control circuit、Reset circuit、Switching on and shutting down control chip、DC-DC power source circuit、Indicator light circuit and buzzer circuit，The input of DC-DC power source circuit is connected with device battery，The input of LDO power circuit is connected with device battery，The outfan of LDO power circuit electrically connects with the input of ON-OFF control circuit，First outfan of ON-OFF control circuit is connected with the first input end of logic or computing circuit，First outfan of ON-OFF control circuit electrically connects with the reset mouth of switching on and shutting down control chip also by reset circuit，Second outfan of ON-OFF control circuit electrically connects with an input/output port of switching on and shutting down control chip，Second input of logic or computing circuit is connected with an input/output port of switching on and shutting down control chip，The output of logic or computing circuit is single to be connected with the Enable Pin of DC-DC power source circuit，The outfan of DC-DC power source circuit is connected with the power end of reset circuit and the power port of switching on and shutting down control chip respectively，The input of described indicator light circuit and the end that controls of buzzer circuit all electrically connect with an input/output port of described switching on and shutting down control chip.nullThis utility model can use STM32F103C8T6 or other control class chips as switching on and shutting down control chip，LDO power circuit can use XC6202P332PR chip or similar LDO power supply chip，DC-DC power source circuit can use MP1584DC-DC power supply chip or similar DC-DC power source chip，The when that this utility model using，If ON-OFF control circuit or switching on and shutting down control chip one of both output control signal，DC-DC power source chip just can start power supply，Switching on and shutting down control chip can be carried out fully powered-off when shutdown by this form，And this utility model is provided with reset circuit，Switching on and shutting down control chip can be made by force to reset by reset circuit，Using method is about the same with existing on-off circuit，But switching on and shutting down control chip can be fully powered-off，Thus save electric energy.
As preferably, the input of described indicator light circuit also first input end with described logic or computing circuit is connected.
As preferably, the power end of buzzer circuit is connected with the outfan of DC-DC power source circuit,
As preferably, logic or computing circuit are or door, or the first input end of door electrically connects with an input/output port of switching on and shutting down control chip, or the second input of door electrically connects with the first outfan of ON-OFF control circuit, or the outfan of door is connected with the Enable Pin of DC-DC power source circuit.
As preferably, logic or computing circuit include realization or gate action the first diode and realization or gate action the second diode, realize or the anode of gate action the first diode electrically connects with an input/output port of switching on and shutting down control chip, realize or the anode of gate action the second diode is connected with the first outfan of ON-OFF control circuit, it is achieved or the negative electrode of gate action the first diode and realization or gate action the second diode all Enable Pins with described DC-DC power source circuit are connected.
As preferably, the Enable Pin of described DC-DC power source circuit is also by resistance R4 ground connection.During shutdown, owing to resistance R4 pulls down to ground, DC-DC power source circuit turns off without output, and during until the Enable Pin of DC-DC power source circuit is high level, DC-DC power source circuit just exports electric current and powers to switching on and shutting down control chip.
nullAs preferably，Described ON-OFF control circuit includes audion U4、Resistance R10、Button K1、Resistance R9、Electric capacity C9、Resistance R11、Resistance R12 and electric capacity C10，First end of described button K1 is connected with the colelctor electrode of described audion U4，Second end of described button K1 is connected by the base stage of resistance R10 and audion U4，Second end of described button K1 is also by resistance R9 ground connection，The colelctor electrode of audion U4 is connected with the outfan of described LDO power circuit，The base stage of audion U4 passes through electric capacity C9 ground connection，The emitter stage of audion U4 passes through resistance R11 ground connection，The emitter stage of audion U4 first input end with logic or computing circuit respectively is connected，The emitter stage of audion U4 is electrically connected with the reset mouth of switching on and shutting down control chip by reset circuit，The emitter stage of audion U4 is also connected with first end of resistance R12，Second end of resistance R12 passes through electric capacity C10 ground connection，Second end of resistance R12 also electrically connects with an input/output port of switching on and shutting down control chip.Coordinating citing with this switching on and shutting down control chip of STM32F103C8T6, when button K1 does not press, audion U4 is not turned on, and output is lasting low level；When button K1 presses, audion U4 turns on, and output is permanent High level.When audion U4 launches extremely high level, the Enable Pin of DC-DC power source circuit is also high, and DC-DC power source circuit is started working, and output electric current is powered to reset circuit and switching on and shutting down control chip.Switching on and shutting down control chip electrification reset output high level signal is to logic or the first input end of computing circuit, ensure that the Enable Pin of DC-DC power source circuit is continuously height, make DC-DC power source circuit be constantly in duty, now unclamp button K1 and i.e. complete start process.After start, when button K1 is pressed again, switching on and shutting down control chip can detect that audion U4 emitter stage is become high level from low level, and now switching on and shutting down control chip electrification reset output low level signal is to logic or the first input end of computing circuit, just can shut down.In ON-OFF control circuit, the effect of electric capacity C9 is button debounce, the effect of resistance R12 and electric capacity C10 is to ensure that and has certain time delay by the signal of resistance R12, signal can be slower than the signal directly picking up from audion U4 emitter stage, it is ensured that switching on and shutting down control chip VDDA end no signal before powering on.
As preferably, described reset circuit includes resistance R14, resistance R13, electric capacity C11, electric capacity C12 and field effect transistor U6, the drain electrode of field effect transistor U6 is connected by the outfan of resistance R14 with DC-DC power source circuit, the grid of field effect transistor U6 is connected by the emitter stage of resistance R13 and audion U4, the grid of field effect transistor U6 passes through electric capacity C11 ground connection, the source ground of field effect transistor U6, the drain electrode of field effect transistor U6 is electrically connected with an input/output port of switching on and shutting down control chip by electric capacity C12 ground connection, the drain electrode of field effect transistor U6.Coordinating citing with this switching on and shutting down control chip of STM32F103C8T6, wherein resistance R14 and electric capacity C12 is the homing action i.e. completing switching on and shutting down control chip at powered on moment.After start, button K1 unclamps, and field effect transistor U6 grid is low level, and field effect transistor U6 is closed, and the RESET end of switching on and shutting down control chip is continuously high level.When device program go wrong cannot perform shutdown programm time, often button K1, field effect transistor U6 grid is uprised level by low level, charge to electric capacity C11 through resistance R13, when charging voltage reaches field effect transistor U6 unblocked level, field effect transistor U6 is opened, switching on and shutting down control chip by high level step-down level, can be with enforced reset switching on and shutting down control chip.
Substantial effect of the present utility model is: and this utility model is after shut down, DC-DC power source circuit closes has no progeny without output, the letter thorough power-off of switching on and shutting down control chip, i.e. after shutdown, switching on and shutting down control chip does not consume battery capacity, simultaneously, this programme achieves single-button start, shuts down and the operation that resets, and has sound and display lamp prompt facility, can avoid equipment user maloperation.
Accompanying drawing explanation
Fig. 1 is a kind of circuit diagram of this utility model breaker in middle machine control chip；
Fig. 2 is a kind of circuit diagram of LDO power circuit in this utility model；
Fig. 3 is a kind of circuit diagram of DC-DC power source circuit in this utility model；
Fig. 4 is a kind of circuit diagram of this utility model breaker in middle control circuit；
Fig. 5 is a kind of circuit diagram of reset circuit in this utility model；
Fig. 6 is logic or a kind of circuit diagram of computing circuit in this utility model.
Detailed description of the invention
Below by specific embodiment, and combine accompanying drawing, the technical solution of the utility model is described in further detail.
Embodiment 1:
nullA kind of on/off circuit，Powered by device battery，Including LDO power circuit、Logic or computing circuit、ON-OFF control circuit、Reset circuit、Switching on and shutting down control chip、DC-DC power source circuit、Indicator light circuit and buzzer circuit，The input of DC-DC power source circuit is connected with device battery，The input of LDO power circuit is connected with device battery，The outfan of LDO power circuit electrically connects with the input of ON-OFF control circuit，First outfan of ON-OFF control circuit is connected with the first input end of logic or computing circuit，First outfan of ON-OFF control circuit electrically connects with the reset mouth of switching on and shutting down control chip also by reset circuit，Second outfan of ON-OFF control circuit electrically connects with an input/output port of switching on and shutting down control chip，Second input of logic or computing circuit is connected with an input/output port of switching on and shutting down control chip，The output of logic or computing circuit is single to be connected with the Enable Pin of DC-DC power source circuit，The outfan of DC-DC power source circuit is connected with the power end of reset circuit and the power port of switching on and shutting down control chip respectively，The input of described indicator light circuit and the end that controls of buzzer circuit all electrically connect with an input/output port of described switching on and shutting down control chip.The input of described indicator light circuit also first input end with described logic or computing circuit is connected.The power end of buzzer circuit is connected with the outfan of DC-DC power source circuit, logic or computing circuit include realization or gate action the first diode and realization or gate action the second diode, realize or the anode of gate action the first diode electrically connects with an input/output port of switching on and shutting down control chip, realize or the anode of gate action the second diode is connected with the first outfan of ON-OFF control circuit, it is achieved or the negative electrode of gate action the first diode and realization or gate action the second diode all Enable Pins with described DC-DC power source circuit are connected.The Enable Pin of described DC-DC power source circuit is also by resistance R4 ground connection.nullDescribed ON-OFF control circuit includes audion U4、Resistance R10、Button K1、Resistance R9、Electric capacity C9、Resistance R11、Resistance R12 and electric capacity C10，First end of described button K1 is connected with the colelctor electrode of described audion U4，Second end of described button K1 is connected by the base stage of resistance R10 and audion U4，Second end of described button K1 is also by resistance R9 ground connection，The colelctor electrode of audion U4 is connected with the outfan of described LDO power circuit，The base stage of audion U4 passes through electric capacity C9 ground connection，The emitter stage of audion U4 passes through resistance R11 ground connection，The emitter stage of audion U4 is connected with the first input end with logic or computing circuit respectively，The emitter stage of audion U4 is electrically connected with the reset mouth of switching on and shutting down control chip by reset circuit，The emitter stage of audion U4 is also connected with first end of resistance R12，Second end of resistance R12 passes through electric capacity C10 ground connection，Second end of resistance R12 also electrically connects with an input/output port of switching on and shutting down control chip.Described reset circuit includes resistance R14, resistance R13, electric capacity C11, electric capacity C12 and field effect transistor U6, the drain electrode of field effect transistor U6 is connected by the outfan of resistance R14 with DC-DC power source circuit, the grid of field effect transistor U6 is connected by the emitter stage of resistance R13 and audion U4, the grid of field effect transistor U6 passes through electric capacity C11 ground connection, the source ground of field effect transistor U6, the drain electrode of field effect transistor U6 is electrically connected with an input/output port of switching on and shutting down control chip by electric capacity C12 ground connection, the drain electrode of field effect transistor U6.nullThe present embodiment uses STM32F103C8T6 represent other equivalents and control class chip as switching on and shutting down control chip，LDO power circuit uses XC6202P332PR chip to represent similar LDO power supply chip，DC-DC power source circuit uses MP1584DC-DC power supply chip to represent similar DC-DC power source chip，The when that the present embodiment using，If ON-OFF control circuit or switching on and shutting down control chip one of both output control signal，DC-DC power source chip just can start power supply，Switching on and shutting down control chip can be carried out fully powered-off when shutdown by this form，And this utility model is provided with reset circuit，Switching on and shutting down control chip can be made by force to reset by reset circuit，Using method is about the same with existing on-off circuit，But switching on and shutting down control chip can be fully powered-off，Thus save electric energy.Specifically, in the present embodiment, when button K1 does not press, audion U4 is not turned on, and output is lasting low level；When button K1 presses, audion U4 turns on, and output is permanent High level.When audion U4 launches extremely high level, the Enable Pin of DC-DC power source circuit is also high, and DC-DC power source circuit is started working, and output electric current is powered to reset circuit and switching on and shutting down control chip.Switching on and shutting down control chip electrification reset output high level signal is to logic or the first input end of computing circuit, ensure that the Enable Pin of DC-DC power source circuit is continuously height, make DC-DC power source circuit be constantly in duty, now unclamp button K1 and i.e. complete start process.After start, when button K1 is pressed again, switching on and shutting down control chip can detect that audion U4 emitter stage is become high level from low level, and now switching on and shutting down control chip electrification reset output low level signal is to logic or the first input end of computing circuit, just can shut down.During shutdown, owing to resistance R4 pulls down to ground, DC-DC power source circuit turns off without output, and during until the Enable Pin of DC-DC power source circuit is high level, DC-DC power source circuit just exports electric current and powers to switching on and shutting down control chip.In ON-OFF control circuit, the effect of electric capacity C9 is button debounce, the effect of resistance R12 and electric capacity C10 is to ensure that and has certain time delay by the signal of resistance R12, signal can be slower than the signal directly picking up from audion U4 emitter stage, ensureing switching on and shutting down control chip VDDA end no signal before powering on, in reset circuit, resistance R14 and electric capacity C12 is the homing action i.e. completing switching on and shutting down control chip at powered on moment.After start, button K1 unclamps, and field effect transistor U6 grid is low level, and field effect transistor U6 is closed, and the RESET end of switching on and shutting down control chip is continuously high level.When device program go wrong cannot perform shutdown programm time, often button K1, field effect transistor U6 grid is uprised level by low level, charge to electric capacity C11 through resistance R13, when charging voltage reaches field effect transistor U6 unblocked level, field effect transistor U6 is opened, switching on and shutting down control chip by high level step-down level, can be with enforced reset switching on and shutting down control chip.
After shut down, switching on and shutting down control chip still in work, inevitably to consume the capacity of a part of battery to prior art；And above example is after shut down, DC-DC power source circuit closes has no progeny without output, the letter thorough power-off of switching on and shutting down control chip, i.e. after shutdown, switching on and shutting down control chip does not consume battery capacity, simultaneously, this programme achieves single-button start, shuts down and the operation that resets, and has sound and display lamp prompt facility, can avoid equipment user maloperation.
Embodiment 2
Substantially the same manner as Example 1, difference is: logic or computing circuit are or door, or the first input end of door electrically connects with an input/output port of switching on and shutting down control chip, or the second input of door electrically connects with the first outfan of ON-OFF control circuit, or the outfan of door is connected with the Enable Pin of DC-DC power source circuit.
Embodiment described above is one of the present utility model preferably scheme, and this utility model is not made any pro forma restriction, also has other variant and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (8)
- null1. an on/off circuit，Powered by device battery，It is characterized in that: include LDO power circuit、Logic or computing circuit、ON-OFF control circuit、Reset circuit、Switching on and shutting down control chip、DC-DC power source circuit、Indicator light circuit and buzzer circuit，The input of DC-DC power source circuit is connected with device battery，The input of LDO power circuit is connected with device battery，The outfan of LDO power circuit electrically connects with the input of ON-OFF control circuit，First outfan of ON-OFF control circuit is connected with the first input end of logic or computing circuit，First outfan of ON-OFF control circuit electrically connects with the reset mouth of switching on and shutting down control chip also by reset circuit，Second outfan of ON-OFF control circuit electrically connects with an input/output port of switching on and shutting down control chip，Second input of logic or computing circuit is connected with an input/output port of switching on and shutting down control chip，The output of logic or computing circuit is single to be connected with the Enable Pin of DC-DC power source circuit，The outfan of DC-DC power source circuit is connected with the power end of reset circuit and the power port of switching on and shutting down control chip respectively，The input of described indicator light circuit and the end that controls of buzzer circuit all electrically connect with an input/output port of described switching on and shutting down control chip.
- On/off circuit the most according to claim 1, it is characterised in that: the input of described indicator light circuit also first input end with described logic or computing circuit is connected.
- On/off circuit the most according to claim 1, it is characterised in that: the power end of buzzer circuit is connected with the outfan of DC-DC power source circuit,
- On/off circuit the most according to claim 1, it is characterized in that: logic or computing circuit are or door, or the first input end of door electrically connects with an input/output port of switching on and shutting down control chip, or the second input of door electrically connects with the first outfan of ON-OFF control circuit, or the outfan of door is connected with the Enable Pin of DC-DC power source circuit.
- On/off circuit the most according to claim 1, it is characterized in that: logic or computing circuit include realization or gate action the first diode and realization or gate action the second diode, realize or the anode of gate action the first diode electrically connects with an input/output port of switching on and shutting down control chip, realize or the anode of gate action the second diode is connected with the first outfan of ON-OFF control circuit, it is achieved or the negative electrode of gate action the first diode and realization or gate action the second diode all Enable Pins with described DC-DC power source circuit are connected.
- 6. according to the on/off circuit described in claim 4 or 5, it is characterised in that: the Enable Pin of described DC-DC power source circuit is also by resistance R4 ground connection.
- null7. according to the on/off circuit described in claim 4 or 5，It is characterized in that: described ON-OFF control circuit includes audion U4、Resistance R10、Button K1、Resistance R9、Electric capacity C9、Resistance R11、Resistance R12 and electric capacity C10，First end of described button K1 is connected with the colelctor electrode of described audion U4，Second end of described button K1 is connected by the base stage of resistance R10 and audion U4，Second end of described button K1 is also by resistance R9 ground connection，The colelctor electrode of audion U4 is connected with the outfan of described LDO power circuit，The base stage of audion U4 passes through electric capacity C9 ground connection，The emitter stage of audion U4 passes through resistance R11 ground connection，The emitter stage of audion U4 first input end with logic or computing circuit respectively is connected，The emitter stage of audion U4 is electrically connected with the reset mouth of switching on and shutting down control chip by reset circuit，The emitter stage of audion U4 is also connected with first end of resistance R12，Second end of resistance R12 passes through electric capacity C10 ground connection，Second end of resistance R12 also electrically connects with an input/output port of switching on and shutting down control chip.
- On/off circuit the most according to claim 7, it is characterized in that: described reset circuit includes resistance R14, resistance R13, electric capacity C11, electric capacity C12 and field effect transistor U6, the drain electrode of field effect transistor U6 is connected by the outfan of resistance R14 with DC-DC power source circuit, the grid of field effect transistor U6 is connected by the emitter stage of resistance R13 and audion U4, the grid of field effect transistor U6 passes through electric capacity C11 ground connection, the source ground of field effect transistor U6, the drain electrode of field effect transistor U6 is by electric capacity C12 ground connection, the drain electrode of field effect transistor U6 electrically connects with an input/output port of switching on and shutting down control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620194660.2U CN205453657U (en) | 2016-03-11 | 2016-03-11 | Startup/shutdown circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620194660.2U CN205453657U (en) | 2016-03-11 | 2016-03-11 | Startup/shutdown circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205453657U true CN205453657U (en) | 2016-08-10 |
Family
ID=56602716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620194660.2U Active CN205453657U (en) | 2016-03-11 | 2016-03-11 | Startup/shutdown circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205453657U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274259A (en) * | 2018-10-29 | 2019-01-25 | 西安空间无线电技术研究所 | A kind of power switch machine control method, device and application |
| CN105720960B (en) * | 2016-03-11 | 2019-01-29 | 武汉中旗生物医疗电子有限公司 | On/off circuit |
-
2016
- 2016-03-11 CN CN201620194660.2U patent/CN205453657U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720960B (en) * | 2016-03-11 | 2019-01-29 | 武汉中旗生物医疗电子有限公司 | On/off circuit |
| CN109274259A (en) * | 2018-10-29 | 2019-01-25 | 西安空间无线电技术研究所 | A kind of power switch machine control method, device and application |
| CN109274259B (en) * | 2018-10-29 | 2020-07-14 | 西安空间无线电技术研究所 | Power supply on-off control method, device and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202443282U (en) | Zero-power-consumption standby circuit | |
| CN105720960A (en) | On-off circuit | |
| CN203537358U (en) | One-key switching circuit | |
| JP2007189891A (en) | Ultra low-power wake-up circuit | |
| CN112737558B (en) | Multifunctional key switch circuit for electronic product | |
| CN106532902A (en) | Mobile terminal dual-battery control device and method | |
| CN205453657U (en) | Startup/shutdown circuit | |
| CN201514611U (en) | Switching circuit of handheld device | |
| CN106950876A (en) | Power supply is locked and wake-up circuit and power module | |
| CN106095060A (en) | A kind of on/off control method for portable multifunctional terminal | |
| CN201813355U (en) | Single chip-based switch circuit with low stand-by power consumption | |
| CN202772861U (en) | Startup and shutdown circuit used in fish finder | |
| CN206162374U (en) | Simply stabilize lossless button switch circuit | |
| CN210780130U (en) | Power-off control circuit | |
| CN208849540U (en) | A kind of circuit for controlling the access of low-power consumption backup battery or being detached from | |
| CN204836118U (en) | Energy -saving control circuit and row of inserting thereof | |
| CN201937563U (en) | Standby low-power consumption power supply switch suitable for single chip microcomputer controller | |
| CN202838176U (en) | Computer power supply zero-power-consumption standby circuit | |
| CN213990636U (en) | Multifunctional key switch circuit for electronic product | |
| CN213780904U (en) | Power supply switching system | |
| CN207164696U (en) | A kind of low-power dissipation power supply | |
| CN208721230U (en) | A kind of soft switch circuit applied on electronic scale | |
| CN207265891U (en) | Low-power consumption AC DC conversion switch circuits | |
| CN207070036U (en) | A kind of button multiplexing power switch circuit | |
| CN206481281U (en) | A kind of electronics Sofe Switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |