CN204759081U - Switching on and shutting down system - Google Patents
Switching on and shutting down system Download PDFInfo
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- CN204759081U CN204759081U CN201520309266.4U CN201520309266U CN204759081U CN 204759081 U CN204759081 U CN 204759081U CN 201520309266 U CN201520309266 U CN 201520309266U CN 204759081 U CN204759081 U CN 204759081U
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Abstract
The utility model relates to an electron product technology field discloses a switching on and shutting down system, including switching on and shutting down module, switching on and shutting down button and MCU intelligent control module, wherein switching on and shutting down module contains start trigger circuit, triggers delay circuit, switching on and shutting down make can circuit and MOS switch, during the start, the switching on and shutting down button is triggered, through triggering delay circuit and power input, makes start trigger circuit switch on, and start trigger circuit drive switch machine messenger can open the MOS switch by the circuit, and the MCU intelligent control module is given to the power input, and the work of MCU intelligent control module is pinned switching on and shutting down and is made the ability circuit, maintains switching on of MOS switch, close machine -hour, the switching on and shutting down button is triggered once more, and the MCU intelligent control module detects the switching on and shutting down button, and after save data and the end process, the release -push machine makes the ability circuit, makes the MOS switch break off. The utility model discloses it is multiplexing to satisfy a key, and the switching on and shutting down of zero stand -by power consumption ground completion system of intelligence.
Description
Technical field
The utility model relates to technical field of electronic products, in particular, and particularly multiplexing, the intelligent zero stand-by power consumption power on/off system of an a kind of key.
Background technology
Along with the development of society, people are not only more and more higher to the requirement of efficiency, also propose more requirement to the reliability of electronic product simultaneously.
In current on/off circuit, there are hard switching and Sofe Switch two kinds of modes, the mode of hard switching is pressing and disconnecting the open and close controlling whole system by power switch, advantage is that implementation is very simple, cost is low, as long as a switch just can cut out the power supply of whole system, standby current can accomplish zero; But shortcoming is power switch can the power supply of cutting system immediately, system has no idea to preserve data and current state while shutdown, if system unexpected power-off when processing critical processes, may cause the damage of file in addition, even can cause the collapse of system.And Sofe Switch mode carrys out by MCU the open and close that detector switch machine button carrys out control system, the mode of Sofe Switch can avoid the shortcoming of hard switching, when MCU detection closing key is triggered, the mode crossing software carrys out delay switching-off, preserve data and correct end process, the stability of increase system and reliability, but shortcoming is all to there is either large or small standby current, does not meet current energy-conservation requirement.
In addition, Current electronic production development, also more and more trends towards miniaturization, and the product that connect and the button of outside are also fewer and feweri, and function but gets more and more.But on current electronic product, power button only has one or two function, be unfavorable for miniaturization and low the change of product.Therefore, prior art needs to improve.
Summary of the invention
The purpose of this utility model is the technical matters existed for prior art, provides a kind of power on/off system, can meet a key multiplexing, and the switching on and shutting down of intelligent zero stand-by power consumption ground completion system.
In order to solve problem set forth above, the technical solution adopted in the utility model is:
A kind of power on/off system, comprises switching on and shutting down module, switching on and shutting down button and MCU intelligent control module, and wherein switching on and shutting down module comprises start trigger circuit, Time delay circuit, switching on and shutting down enable circuits and MOS switch;
During start, switching on and shutting down button is triggered, by Time delay circuit and power supply input, make the conducting of start trigger circuit, start trigger circuit driving switch machine enable circuits opens MOS switch, power supply inputs to MCU intelligent control module, and switching on and shutting down enable circuits is pinned in the work of MCU intelligent control module, maintains the conducting of MOS switch; During shutdown, switching on and shutting down button is triggered again, and MCU intelligent control module detects switching on and shutting down button, after preserving data and end process, discharges shutdown enable circuits, MOS switch is disconnected.
Also comprise reseting module, described reseting module comprises reset trigger circuit, reset delay circuit and reset enable circuit; When there is unusual failure, MCU intelligent control module now can't detect switching on and shutting down button, then pin switching on and shutting down button always, and power supply inputs to reset trigger circuit and makes its conducting, reset delay circuit trigger simultaneously; After reaching set reset delay time, reset enable circuit starts action, cut-off switch machine enable circuits, and MOS switch is disconnected; If do not reach set reset delay time with regard to trip switch machine button, then do not do any action.
During start, after MCU intelligent control module powers on, send level and pin switching on and shutting down enable circuits, and judge the time length that switching on and shutting down button is pressed; If reach the time of setting, then maintain the conducting of MOS switch, system enters normal operating conditions; If do not reach the time of setting, then think interference level, shutdown enable circuits can be discharged, disconnect MOS switch, return standby;
During shutdown, MCU intelligent control module detects switching on and shutting down button, and judges the time length that switching on and shutting down button is pressed; If reach the time of setting, then preserve data, discharge shutdown enable circuits, disconnect MOS switch; If do not reach the time of setting, then think interference level, maintain the conducting of MOS switch.
Described reset trigger circuit comprises resistance R2, resistance R3 and triode SW3, wherein a termination power input of resistance R2 and the emitter of triode SW3, one end of other end connecting resistance R3 and the base stage of triode SW3; Another termination reset delay circuit of resistance R3 and one end of switching on and shutting down button SW5, the other end ground connection of switching on and shutting down button SW5; The collector of triode SW3 connects reset delay circuit.
Described reset delay circuit comprises resistance R1, electric capacity C1, resistance R8 and metal-oxide-semiconductor SW7, wherein the collector of a termination triode SW3 of resistance R1, the positive pole of another termination capacitor C1, the minus earth of electric capacity C1, and resistance R8 is in parallel with electric capacity C1; The drain electrode of metal-oxide-semiconductor SW7 is connected between the positive pole of resistance R1 and electric capacity C1, source ground, and grid is connected with the other end of resistance R3;
Described reset enable circuit adopts metal-oxide-semiconductor SW4, and its grid is connected between the positive pole of resistance R1 and electric capacity C1, source ground, drain electrode connecting valve machine enable circuits.
Described Time delay circuit comprises resistance R4 and electric capacity C2, and both are in parallel, wherein termination start trigger circuit of resistance R4, one end of other end connecting resistance R3, and the positive pole of electric capacity C2 is connected between resistance R4 and start trigger circuit;
Described start trigger circuit comprise diode D1, resistance R5, resistance R6 and triode SW2, wherein one end of the positive pole connecting resistance R5 of diode D1, one end of negative pole connecting resistance R4; The base stage of another termination triode SW2 of resistance R5; The one termination power input of resistance R6, the emitter of another termination triode SW2; The collector connecting valve machine enable circuits of triode SW2.
Described switching on and shutting down enable circuits comprises resistance R7, resistance R9, resistance R10, resistance R11, electric capacity C3, electric capacity C4, triode SW6, wherein electric capacity C4 is in parallel with resistance R7, one end after both parallel connections connects the grid of power supply input and MOS switch respectively, one end of other end connecting resistance R11, the collector of another termination triode SW6 of resistance R11; The negative pole of one terminating diode D2 of resistance R9, the collector of triode SW2 and metal-oxide-semiconductor SW4 drain, the base stage of another termination triode SW6 of resistance R9, the grounded emitter of triode SW6; Electric capacity C3 is in parallel with resistance R10, and one end ground connection after both parallel connections, the other end is connected between the base stage of resistance R9 and triode SW6.
Described MOS switch adopts metal-oxide-semiconductor SW1, and its grid is connected between electric capacity C4 and resistance R11, and source electrode connects power supply input, and drain electrode connects power supply and exports and MCU intelligent control module;
A test side connecting valve machine button SW5 of described MCU intelligent control module, for detector switch machine button SW5, another controls the positive pole of terminating diode D2.
Compared with prior art, the beneficial effects of the utility model are:
A switching on and shutting down button is adopted to realize several functions in the utility model, as start, shutdown, reset, and adopt the switching on and shutting down of switching on and shutting down module, reseting module and MCU intelligent control module completion system, stability, the reliability of system when namely adopting the mode of Sofe Switch to solve switching on and shutting down, have the problem of stand-by power consumption when solving standby simultaneously, its simplicity of design, reliable and stable, there is no standby current, the mode of another employing software shutdown, avoids the loss of data and the damage of file system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model power on/off system.
Fig. 2 is the circuit diagram of the utility model power on/off system.
Fig. 3 is the process flow diagram of the utility model power on/off system.
Embodiment
For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in instructions of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.
Consult shown in Fig. 1, a kind of power on/off system that the utility model provides, comprise switching on and shutting down module, reseting module, switching on and shutting down button and MCU intelligent control module, wherein switching on and shutting down module comprises start trigger circuit, Time delay circuit, switching on and shutting down enable circuits and MOS switch.Reseting module comprises reset trigger circuit, reset delay circuit and reset enable circuit.
Described switching on and shutting down button is a touch-switch, and start, shut down and be reset to same button, namely achieve a key multiplexing.Switching on and shutting down button can also use as other function, and as set by software, long by being start and shutdown, short in doing as functions such as time-out, broadcasting, confirmations, overlength is by being forced resetting.
Described MCU intelligent control module is used for detector switch machine button, and judges whether switching on and shutting down button is pressed and presses the length of time, and sends the start of instruction gauge tap machine enable circuits or shutdown.MCU intelligent control module also plays the effect of shutdown time delay, for preserving data and end process.
Described Time delay circuit is used for carrying out time delay when switching on and shutting down button presses start, and exports starting-up signal to start trigger circuit.When switching on and shutting down button is by the pressing of mistake always, if Time delay terminates, even if switching on and shutting down button is pressed, start trigger circuit also can not conducting, such guarantee system ceaselessly can not circulate, thus can save power supply in start, reset, start, reset.
Described reset delay circuit is trigger when pressing from switching on and shutting down button, and time of time delay is the time required for resetting, after reaching set reset delay time, reset enable circuit action, switching on and shutting down enable circuits is allowed to disconnect, whole system power down, forced resetting.
In above-mentioned, reset delay circuit also comprises reset delay clear circuit, and when switching on and shutting down button is released, this reset delay clear circuit conducting immediately, removes time delay.
Described MOS switch has Delayed conducting function, avoids the big current of booting moment to damage this switching tube.
In above-mentioned, the principle of work that switching on and shutting down module uses as start and shut-off function is as follows:
During start, switching on and shutting down button is triggered, and by Time delay circuit and power supply input, makes the action at once of start trigger circuit.Meanwhile, Time delay circuit delay a period of time, start trigger circuit are allowed to maintain certain stable ON time, ON time equals the Time delay time used, and give switching on and shutting down enable circuits one start level, make MOS switch conduction, power supply inputs to MCU intelligent control module and powers on.At once provide level catch switching on and shutting down enable circuits after MCU intelligent control module powers on, and start the time length that judges that switching on and shutting down button is pressed, to determine whether allow whole system power on.If reach the set time, then allow system electrification, continue to pin switching on and shutting down enable circuits, maintain the conducting of MOS switch, system starts normal work, completes start; If do not reached, MCU intelligent control module can think an interference level, can discharge shutdown enable circuits, and disconnect MOS switch, the power down of MCU intelligent control module, returns standby.The effect of Time delay circuit is before MCU intelligent control module does not send start block level, allows the conducting always of start trigger circuit, maintains the conducting of MOS switch, allows MCU intelligent control module have the enough time to enter duty.
During shutdown, switching on and shutting down button is triggered, and after MCU intelligent control module detects the action of switching on and shutting down button, will begin in a minute timing, and judge the time length that switching on and shutting down button is pressed, if reach the set time, MCU intelligent control module starts to preserve data, after end process, send the instruction discharging shutdown enable circuits, disconnect MOS switch, cut off the power supply of whole system, whole system is returned standby; If the time that switching on and shutting down button is pressed does not reach the set time, MCU intelligent control module can think an interference level, does not do to comprehend, and continues normally to work, and namely maintains the conducting of MOS switch.
In above-mentioned, the principle that reseting module does reset function use is as follows:
When there is unusual failure in system, as in MCU intelligent control module program sideslip run fly, enter endless loop or crash time, MCU intelligent control module can not detect switching on and shutting down button, at this moment will force power-off restoration.Pin switching on and shutting down button, power supply inputs to reset trigger circuit and makes its conducting, reset delay circuit trigger simultaneously always.After reaching set reset delay time, time delay terminates, and reset enable circuit starts action, cut-off switch machine enable circuits, MOS switch is disconnected, whole system power down, forced resetting success; If do not reach the set reset delay time just unclamp button, then whole system does not do any action, waits for that switching on and shutting down button is triggered again.
As shown in Figure 2, described reset trigger circuit comprises resistance R2, resistance R3 and triode SW3, wherein a termination power input of resistance R2 and emitter, one end of other end connecting resistance R3 and the base stage of triode SW3 of triode SW3.Another termination reset delay circuit of resistance R3 and one end of switching on and shutting down button SW5, the other end ground connection of switching on and shutting down button SW5; The collector of triode SW3 connects reset delay circuit.
Described reset delay circuit comprises resistance R1, electric capacity C1, resistance R8 and metal-oxide-semiconductor SW7, wherein the collector of a termination triode SW3 of resistance R1, the positive pole of another termination capacitor C1, the minus earth of electric capacity C1, and resistance R8 is in parallel with electric capacity C1; The drain electrode of metal-oxide-semiconductor SW7 is connected between the positive pole of resistance R1 and electric capacity C1, source ground, and grid is connected with the other end of resistance R3, is namely connected between resistance R3 and switching on and shutting down button SW5.
Described reset enable circuit adopts metal-oxide-semiconductor SW4, and the grid of metal-oxide-semiconductor SW4 is connected between the positive pole of resistance R1 and electric capacity C1, source ground, drain electrode connecting valve machine enable circuits.
Described Time delay circuit comprises resistance R4 and electric capacity C2, wherein resistance R4 is in parallel with electric capacity C2, the one termination start trigger circuit of resistance R4, one end of other end connecting resistance R3, namely be connected between resistance R3 and switching on and shutting down button SW5, the positive pole of electric capacity C2 is connected between resistance R4 and start trigger circuit.
Described start trigger circuit comprise diode D1, resistance R5, resistance R6 and triode SW2, wherein one end of the positive pole connecting resistance R5 of diode D1, one end of negative pole connecting resistance R4; The base stage of another termination triode SW2 of resistance R5; The one termination power input of resistance R6, the emitter of another termination triode SW2; The collector connecting valve machine enable circuits of triode SW2.
Described switching on and shutting down enable circuits comprises resistance R7, resistance R9, resistance R10, resistance R11, electric capacity C3, electric capacity C4, triode SW6, wherein electric capacity C4 is in parallel with resistance R7, one end after both parallel connections connects the grid of power supply input and MOS switch respectively, one end of other end connecting resistance R11, the collector of another termination triode SW6 of resistance R11; The negative pole of one terminating diode D2 of resistance R9, the collector of triode SW2 and metal-oxide-semiconductor SW4 drain, the base stage of another termination triode SW6 of resistance R9, the grounded emitter of triode SW6; Electric capacity C3 is in parallel with resistance R10, and one end ground connection after both parallel connections, the other end is connected between the base stage of resistance R9 and triode SW6.
Described MOS switch adopts metal-oxide-semiconductor SW1, and wherein the grid of metal-oxide-semiconductor SW1 is connected between electric capacity C4 and resistance R11, and source electrode connects power supply input, and drain electrode connects power supply and exports and MCU intelligent control module.
Switching on and shutting down button SW5 is received in a test side of described MCU intelligent control module, and for detector switch machine button SW5, another controls the positive pole of terminating diode D2, for locking and the shutdown of starting shooting.
In above-mentioned, start process is described in detail as follows:
When power supply input enters standby, now metal-oxide-semiconductor SW1, triode SW2, triode SW3, triode SW6 are in cut-off state, triode SW7 conducting, but when between the drain electrode of triode SW7 and source electrode, voltage is zero, the resistance of metal-oxide-semiconductor SW1 is infinitely great, so now the standby current of whole system is zero.
Press switching on and shutting down button SW5, switching on and shutting down button SW5 is shorted to ground, and the base voltage of triode SW2 is drawn as low level by resistance R5, diode D1, electric capacity C2, triode SW5 instantaneously, the emitter of triode SW2 and collector conducting; Power supply is also by resistance R6, triode SW2 simultaneously, triode SW6 is given to after going interference through resistance R9, resistance R10 dividing potential drop, electric capacity C3, the emitter of triode SW6 and collector conducting, after triode SW6 conducting, by resistance R7, resistance R11, the grid of metal-oxide-semiconductor SW1 is drawn as low level, source electrode and the drain electrode conducting of metal-oxide-semiconductor SW1, power supply exports to MCU intelligent control module and other circuit by metal-oxide-semiconductor SW1.MCU intelligent control module power-up initializing, and send high level immediately, this high level is loaded into triode SW6 by diode D2, resistance R9, maintains metal-oxide-semiconductor SW1 conducting always, pins power supply.After pinning power supply, MCU intelligent control module starts timing to the time that switching on and shutting down button SW5 presses, and as reached the set time, MCU intelligent control module powers on and initialization to other circuit, enters normal operating conditions; If do not reach the set time, MCU intelligent control module can judge this time as interference level, and sends low level, this low level is loaded into triode SW6 by diode D2, resistance R9, triode SW6 is ended, causes metal-oxide-semiconductor SW1 to end, power supply disconnects.
Wherein, resistance R4 is in parallel with electric capacity C2, and the value of resistance R4 is set to enough large, is used as Time delay, and after switching on and shutting down button SW5 is pressed, power supply is charged to electric capacity C2 by resistance R6, triode SW2, resistance R5, diode D1, makes triode SW2 conducting.If switching on and shutting down button SW5 is pressed always, when electric capacity C2 is full of electricity, because resistance R4 is enough large, the base level of triode SW2 can differ very little with emitter, triode SW2 ends, and system can enter shutdown, avoids allowing system in start, reset, start, reset circulation always.When this function is used as switching on and shutting down button SW5 Damage by Short Circuit or when packing breaker in middle machine button SW5 and depressed always, the power supply of parting system, saves power supply.
Electric capacity C4 is in parallel with resistance R7 in addition; when triode SW6 conducting; electric capacity C4 starts charging by resistance R11 and triode SW6; because the voltage at electric capacity C4 two ends can not suddenly change; metal-oxide-semiconductor SW1 can not at once conducting, but charges along with electric capacity C4, metal-oxide-semiconductor SW1 slowly conducting; avoid the dash current of metal-oxide-semiconductor SW1 fast conducting, protection metal-oxide-semiconductor SW1.Diode D2 does isolation, and insulating power supply voltage enters MCU intelligent control module by resistance R6, triode SW2.
Above-mentioned shutdown process is described in detail as follows:
In system worked well, MCU intelligent control module can the state of detector switch machine button SW5 always, when switching on and shutting down button SW5 is pressed, and detected by MCU intelligent control module, the time that MCU intelligent control module starts switching on and shutting down button SW5 presses starts timing, as reached the set time, MCU intelligent control module enters shutdown process, start to preserve data, terminate other process and close the power supply of other system, afterwards, MCU intelligent control module sends low level, this low level is by diode D2, resistance R9 is loaded into triode SW6, triode SW6 is ended, metal-oxide-semiconductor SW1 is caused to end, power supply disconnects, whole system enters standby, if the time that switching on and shutting down button SW5 presses does not reach the set time, MCU intelligent control module can think that this button is interference level, does not do to comprehend, and continues normally to work.
Above-mentioned reseting procedure is described in detail as follows:
At work, when unusual failure appears in system, as in MCU intelligent control module program sideslip run fly, enter endless loop or crash time, MCU intelligent control module cisco unity malfunction, at this moment pins switching on and shutting down button SW5 always, and switching on and shutting down button SW5 is shorted to ground, power supply is by resistance R2 and resistance R3 dividing potential drop, the base stage of triode SW3 is pulled to low level, the emitter of triode SW3 and collector conducting, and input power begins through triode SW3, resistance R1 and charges to electric capacity C1.Duration of charging is determined by the size of supply voltage, resistance R1/R8 value and the size of electric capacity C1 value, and resistance R1, electric capacity C1 are larger, charge slower, and less then faster, resistance R8 is larger, charge also faster.When the voltage on electric capacity C1 is charged to the turn-on threshold of metal-oxide-semiconductor SW4, metal-oxide-semiconductor SW4 conducting, its drain electrode and source conduction are to ground, the base level of triode SW6 is pulled to electronegative potential, and triode SW6 ends, and causes metal-oxide-semiconductor SW1 to end, power supply disconnects, whole system power down, enters standby, resets successfully.
Wherein, if switching on and shutting down button SW5 is pressed, the grid of metal-oxide-semiconductor SW7 is pulled to low level, and metal-oxide-semiconductor SW7 ends, the conducting of electric capacity C1 charging and metal-oxide-semiconductor SW4 can not be affected, if switching on and shutting down button SW5 is released, triode SW3 can end, and the grid of metal-oxide-semiconductor SW7 also can be pulled to high level, the drain electrode of metal-oxide-semiconductor SW7 and source conduction are to ground, horse back is the electricity on electric capacity C1 to dischargeing, and reset delay resets, and can not affect the timing that next time resets.
As shown in Figure 3, the utility model also provides a kind of method for start-up and shutdown, and the method concrete steps are as follows:
Step one: system standby.
Step 2: switching on and shutting down button is triggered, makes Time delay circuit turn-on go forward side by side line delay.
Step 3: start trigger circuit conducting, and input signal is to switching on and shutting down enable circuits, makes MOS switch conduction.The time of start trigger circuit conducting equals the time of Time delay circuit delay.
Step 4: power supply inputs to MCU intelligent control module, makes MCU intelligent control module work on power, and pins switching on and shutting down enable circuits.
Step 5: MCU intelligent control module judges whether the time that switching on and shutting down button is pressed reaches setting value (being set to 3S), if reached, then continues to pin switching on and shutting down enable circuits, maintains MOS switch conduction, perform step 6; If do not reached, then discharge shutdown enable circuits, disconnect MOS switch, return step one, system is returned standby.
Step 6: system worked well, MCU intelligent control module waits for the new element of switching on and shutting down button.
Step 7: switching on and shutting down button is triggered again, and detected by MCU intelligent control module.
Step 8: MCU intelligent control module judges whether the time that switching on and shutting down button is pressed reaches setting value (being set to 3S), if reached, then preserves ED process, and discharge shutdown enable circuits, disconnect MOS switch, return step one, system is returned standby; If do not reached, then regard as interference level, do not process, return step 6, system continues normal work.
If there is unusual failure in system, as in MCU intelligent control module program sideslip run fly, enter endless loop or crash time, then reset, its method step is as follows:
Step 1: switching on and shutting down button is long pressed and triggers.
Step 2: reset trigger circuit turn-on, reset delay circuit is started working and carries out time delay, the reset delay time is set to 20S.
Step 3: reset delay circuit starts timing, and judge whether the time that switching on and shutting down button is pressed reaches the reset delay time, if reached, then reset enable circuit conducting, cut-off switch machine enable circuits, MOS switch is disconnected, the power down of MCU intelligent control module, system forced resetting enters standby; If do not reached, then return step 1, wait for that switching on and shutting down button is triggered again.
Adopt the mode of software and hardware combining to carry out switching on and shutting down in the utility model, standby current can accomplish zero in theory, but there is leakage current because of MOS switch and triode in reality, only has below 0.1uA through experiment test, therefore can regard as zero, namely achieve intelligent zero stand-by power consumption.
The utility model can be used in all terminals needed with touch key switching on and shutting down such as audio frequency, video, IT, medical treatment, communication, and therefore its applicability is wide, compatible might as well.
Above-described embodiment is the utility model preferably embodiment; but embodiment of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (8)
1. a power on/off system, is characterized in that: comprise switching on and shutting down module, switching on and shutting down button and MCU intelligent control module, and wherein switching on and shutting down module comprises start trigger circuit, Time delay circuit, switching on and shutting down enable circuits and MOS switch;
During start, switching on and shutting down button is triggered, by Time delay circuit and power supply input, make the conducting of start trigger circuit, start trigger circuit driving switch machine enable circuits opens MOS switch, power supply inputs to MCU intelligent control module, and switching on and shutting down enable circuits is pinned in the work of MCU intelligent control module, maintains the conducting of MOS switch; During shutdown, switching on and shutting down button is triggered again, and MCU intelligent control module detects switching on and shutting down button, after preserving data and end process, discharges shutdown enable circuits, MOS switch is disconnected.
2. power on/off system according to claim 1, is characterized in that: also comprise reseting module, and described reseting module comprises reset trigger circuit, reset delay circuit and reset enable circuit; When there is unusual failure, MCU intelligent control module now can't detect switching on and shutting down button, then pin switching on and shutting down button always, and power supply inputs to reset trigger circuit and makes its conducting, reset delay circuit trigger simultaneously; After reaching set reset delay time, reset enable circuit starts action, cut-off switch machine enable circuits, and MOS switch is disconnected; If do not reach set reset delay time with regard to trip switch machine button, then do not do any action, reset delay circuit removes time delay.
3. power on/off system according to claim 1, is characterized in that: during start, after MCU intelligent control module powers on, sends level and pins switching on and shutting down enable circuits, and judge the time length that switching on and shutting down button is pressed; If reach the time of setting, then maintain the conducting of MOS switch, system enters normal operating conditions; If do not reach the time of setting, then think interference level, shutdown enable circuits can be discharged, disconnect MOS switch, return standby;
During shutdown, MCU intelligent control module detects switching on and shutting down button, and judges the time length that switching on and shutting down button is pressed; If reach the time of setting, then preserve data, discharge shutdown enable circuits, disconnect MOS switch; If do not reach the time of setting, then think interference level, maintain the conducting of MOS switch.
4. power on/off system according to claim 2, it is characterized in that: described reset trigger circuit comprises resistance R2, resistance R3 and triode SW3, a wherein termination power input of resistance R2 and the emitter of triode SW3, one end of other end connecting resistance R3 and the base stage of triode SW3; Another termination reset delay circuit of resistance R3 and one end of switching on and shutting down button SW5, the other end ground connection of switching on and shutting down button SW5; The collector of triode SW3 connects reset delay circuit.
5. power on/off system according to claim 4, it is characterized in that: described reset delay circuit comprises resistance R1, electric capacity C1, resistance R8 and metal-oxide-semiconductor SW7, the wherein collector of a termination triode SW3 of resistance R1, the positive pole of another termination capacitor C1, the minus earth of electric capacity C1, resistance R8 is in parallel with electric capacity C1; The drain electrode of metal-oxide-semiconductor SW7 is connected between the positive pole of resistance R1 and electric capacity C1, source ground, and grid is connected with the other end of resistance R3;
Described reset enable circuit adopts metal-oxide-semiconductor SW4, and its grid is connected between the positive pole of resistance R1 and electric capacity C1, source ground, drain electrode connecting valve machine enable circuits.
6. power on/off system according to claim 5, it is characterized in that: described Time delay circuit comprises resistance R4 and electric capacity C2, both are in parallel, wherein termination start trigger circuit of resistance R4, one end of other end connecting resistance R3, the positive pole of electric capacity C2 is connected between resistance R4 and start trigger circuit;
Described start trigger circuit comprise diode D1, resistance R5, resistance R6 and triode SW2, wherein one end of the positive pole connecting resistance R5 of diode D1, one end of negative pole connecting resistance R4; The base stage of another termination triode SW2 of resistance R5; The one termination power input of resistance R6, the emitter of another termination triode SW2; The collector connecting valve machine enable circuits of triode SW2.
7. power on/off system according to claim 6, it is characterized in that: described switching on and shutting down enable circuits comprises resistance R7, resistance R9, resistance R10, resistance R11, electric capacity C3, electric capacity C4, triode SW6, wherein electric capacity C4 is in parallel with resistance R7, one end after both parallel connections connects the grid of power supply input and MOS switch respectively, one end of other end connecting resistance R11, the collector of another termination triode SW6 of resistance R11; The negative pole of one terminating diode D2 of resistance R9, the collector of triode SW2 and metal-oxide-semiconductor SW4 drain, the base stage of another termination triode SW6 of resistance R9, the grounded emitter of triode SW6; Electric capacity C3 is in parallel with resistance R10, and one end ground connection after both parallel connections, the other end is connected between the base stage of resistance R9 and triode SW6.
8. power on/off system according to claim 7, is characterized in that: described MOS switch adopts metal-oxide-semiconductor SW1, and its grid is connected between electric capacity C4 and resistance R11, and source electrode connects power supply input, and drain electrode connects power supply and exports and MCU intelligent control module;
A test side connecting valve machine button SW5 of described MCU intelligent control module, for detector switch machine button SW5, another controls the positive pole of terminating diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520309266.4U CN204759081U (en) | 2015-05-14 | 2015-05-14 | Switching on and shutting down system |
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| CN107681887B (en) * | 2017-11-21 | 2023-08-22 | 四川巧夺天工信息安全智能设备有限公司 | Switching power supply circuit |
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| CN108306630A (en) * | 2018-04-02 | 2018-07-20 | 吟飞科技(江苏)有限公司 | A kind of switch and reset circuit of power supply |
| CN108306630B (en) * | 2018-04-02 | 2024-01-26 | 吟飞科技(江苏)有限公司 | Switch and reset circuit of power supply |
| CN109884935A (en) * | 2018-11-30 | 2019-06-14 | 珠海趣印科技有限公司 | A kind of multivoltage multifunctional multiplexing reset switch latching circuit |
| WO2022110485A1 (en) * | 2020-11-30 | 2022-06-02 | 深圳市创想三维科技有限公司 | Power-on self-test protection circuit and 3d printer |
| CN112486072A (en) * | 2020-12-02 | 2021-03-12 | 郑州嘉晨电器有限公司 | Low-power-consumption starting circuit |
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| WO2024040419A1 (en) * | 2022-08-23 | 2024-02-29 | 厦门新能达科技有限公司 | Battery heating device, battery management system, battery pack, and electric apparatus |
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