CN105223858B

CN105223858B - The switching on and shutting down control circuit of a kind of electronic equipment

Info

Publication number: CN105223858B
Application number: CN201410264400.3A
Authority: CN
Inventors: 梁大衡
Original assignee: Shenzhen Allwins Technology Corp
Current assignee: Dongguan tengze Electronic Technology Co., Ltd
Priority date: 2014-06-13
Filing date: 2014-06-13
Publication date: 2018-05-04
Anticipated expiration: 2034-06-13
Also published as: CN105223858A

Abstract

The invention belongs to electronic circuit technology field, there is provided the switching on and shutting down control circuit of a kind of electronic equipment.The present invention is by the way that using the switching on and shutting down control circuit for including switching on and shutting down trigger module, switching on and shutting down control module and power module, its circuit structure is simple, cost is low and is conducive to minimize in the electronic device；When the system of electronic equipment is in open state, if switching on and shutting down trigger module persistently receives shutdown trigger action in second time period, output control signal and clock enabling signal switching on and shutting down control module control power supply chip are stopped when then controller can be poor, so that system closedown；When the system of electronic equipment is in off-mode, if switching on and shutting down trigger module receives start trigger action, switching on and shutting down control module can start to work according to the start trigger signal driving power chip that switching on and shutting down trigger module is exported, so that system boot, so as to reliablely and stablely realize switching on and shutting down control to electronic equipment.

Description

The switching on and shutting down control circuit of a kind of electronic equipment

Technical field

The invention belongs to the switching on and shutting down control circuit in electronic circuit technology field, more particularly to a kind of electronic equipment.

Background technology

At present, as the fast development of science and technology, the various electronic equipments for possessing high and new technology are widely used in respectively A field and place, facility is provided for the work and life of people.Most electronic equipments are almost in use Round-the-clock opening, this can not only reduce the service life of electronic equipment, while will also result in the waste of the energy.In this regard, it is Switching on and shutting down control can be realized to electronic equipment to extend service life and the energy-saving and emission-reduction of electronic equipment, the prior art provides Following three kinds of switching on and shutting down control programs：

(1) power management chip is coordinated to carry out switching on and shutting down control, power management core to electronic equipment using switching on and shutting down button Whether piece is pressed according to switching on and shutting down button and sends corresponding switch machine testing signal, Ran Houyou to the controller of electronic equipment Switching on and shutting down control is realized electronic equipment in data interaction between power management chip and controller.Due to the program mainly according to By interacting to realize switching on and shutting down control between power management chip and controller, its intelligence degree is higher, and cost is also opposite It is higher.

(2) switching on and shutting down control is carried out to electronic equipment using switching on and shutting down button, microcontroller and on-off circuit, when switching on and shutting down are pressed When key is pressed, microcontroller controlling switch circuit exports supply voltage to the controller of electronic equipment to realize start；In electricity When sub- equipment is in open state, if switching on and shutting down button is persistently pressed within a period of time, microcontroller controlling switch electricity Road is cut off the power voltage, so that the controller power-off of electronic equipment, controls so as to fulfill shutdown.The program needs to press in switching on and shutting down The additional microcontroller of key, can take larger printed circuit board area, and then cause cost to increase, and be unfavorable for electronic equipment In on/off circuit miniaturization.

(3) a self-locking key switch or toggle switch are installed at the power input circuit of electronic equipment to electronic equipment Realize mechanical switching on and shutting down control.Relative to above-mentioned scheme (1) and scheme (2), the cost of this programme is minimum, but it can not Intelligentized switching on and shutting down control is realized to electronic equipment, its flexibility is poor, and easily switching on and shutting down malfunction occurs, reduces out The reliability of shutdown control.

In conclusion the prior art has the reliability and stability that can not only ensure switching on and shutting down control, but also it can realize electricity The problem of miniaturization on road and low cost.

The content of the invention

It is an object of the invention to provide the switching on and shutting down control circuit of a kind of electronic equipment, it is intended to solves the prior art and is deposited Can not only ensure switching on and shutting down control reliability and stability, but also can realize circuit miniaturization and low cost the problem of.

The present invention is achieved in that the switching on and shutting down control circuit of a kind of electronic equipment, it includes controller and power supply core Piece；When system electrification in the electronic device starts, the controller powers on, and the first input/output terminal of the controller and Second input/output terminal is high-impedance state or input state；The power end and ground terminal of the power supply chip connect respectively DC power supply and Ground, the Enable Pin of the power supply chip are effective for high level；

The switching on and shutting down control circuit further includes switching on and shutting down trigger module, switching on and shutting down control module and power module；It is described The power end of switching on and shutting down trigger module and the power end of the switching on and shutting down control module are connected to the output terminal of the power module altogether, The signal bidirectional end and output terminal of the switching on and shutting down trigger module connect the first input/output terminal and the institute of the controller respectively The clock end of switching on and shutting down control module is stated, is connected between the signal bidirectional end and output terminal of the switching on and shutting down trigger module, The signal end of the switching on and shutting down control module connects the second input/output terminal of the controller, the switching on and shutting down control module Output terminal connects the Enable Pin of the power supply chip；

When system electrification in the electronic equipment starts, if the switching on and shutting down trigger module is in first time period Start trigger action is persistently received, then the switching on and shutting down trigger module continues the to the controller in first time period The clock end of one input/output terminal and switching on and shutting down control module output start trigger signal, the switching on and shutting down control module root High level is exported to the Enable Pin of the power supply chip according to the start trigger signal, and output system is electric therewith for the power supply chip Pressure makes system boot；

When system in the electronic equipment is in open state, if the switching on and shutting down trigger module is in the second time Shutdown trigger action is persistently received in section, then the switching on and shutting down trigger module continues to the control in the second time period The clock end of first input/output terminal of device processed and switching on and shutting down control module output shutdown trigger signal, the controller root The letter of the switching on and shutting down control module is persistently output control signals in the first preset time period according to the shutdown trigger signal Number end, and when the output time of the control signal reaches the half of first preset time period, the of the controller One input/output terminal persistently exports clock signal in the second preset time period, and the clock signal is triggered by the switching on and shutting down Module is exported to the clock end of the switching on and shutting down control module, and the switching on and shutting down control module is according to the control signal and described Clock signal export low level to the power supply chip Enable Pin, the power supply chip stop output system voltage therewith so that System closedown, the controller are also electric under；

When system in the electronic equipment is in off-mode, if the switching on and shutting down trigger module receives start Trigger action, then first input/output terminal and the switching on and shutting down control module of the switching on and shutting down trigger module to the controller Clock end output start trigger signal, the switching on and shutting down control module exports high level to institute according to the start trigger signal State the Enable Pin of power supply chip, output system voltage is so that system boot therewith for the power supply chip, and the controller is also therewith Power on.

Present invention also offers the switching on and shutting down control circuit of another electronic equipment, it includes controller and power supply chip； When system electrification in the electronic device starts, the controller powers on, and the first input/output terminal of the controller and the Two input/output terminals are high-impedance state or input state；The power end and ground terminal of the power supply chip connect respectively DC power supply and Ground, the Enable Pin of the power supply chip are effective for low level；

When system electrification in the electronic equipment starts, if the switching on and shutting down trigger module is in first time period Start trigger action is persistently received, then the switching on and shutting down trigger module continues the to the controller in first time period The clock end of one input/output terminal and switching on and shutting down control module output start trigger signal, the switching on and shutting down control module root Low level is exported to the Enable Pin of the power supply chip according to the start trigger signal, and output system is electric therewith for the power supply chip Pressure makes system boot；

When system in the electronic equipment is in open state, if the switching on and shutting down trigger module is in the second time Shutdown trigger action is persistently received in section, then the switching on and shutting down trigger module continues to the control in the second time period The clock end of first input/output terminal of device processed and switching on and shutting down control module output shutdown trigger signal, the controller root The letter of the switching on and shutting down control module is persistently output control signals in the first preset time period according to the shutdown trigger signal Number end, and when the output time of the control signal reaches the half of first preset time period, the of the controller One input/output terminal persistently exports clock signal in the second preset time period, and the clock signal is triggered by the switching on and shutting down Module is exported to the clock end of the switching on and shutting down control module, and the switching on and shutting down control module is according to the control signal and described Clock signal export high level to the power supply chip Enable Pin, the power supply chip stop output system voltage therewith so that System closedown, the controller are also electric under；

When system in the electronic equipment is in off-mode, if the switching on and shutting down trigger module receives start Trigger action, then first input/output terminal and the switching on and shutting down control module of the switching on and shutting down trigger module to the controller Clock end output start trigger signal, the switching on and shutting down control module exports low level to institute according to the start trigger signal State the Enable Pin of power supply chip, output system voltage is so that system boot therewith for the power supply chip, and the controller is also therewith Power on.

The present invention includes switching on and shutting down trigger module, switching on and shutting down control module and power module by using in the electronic device Switching on and shutting down control circuit, its circuit structure is simple, cost is low and is conducive to minimize；Start is in the system of electronic equipment During state, if switching on and shutting down trigger module persistently receives shutdown trigger action in second time period, when controller can be poor Output control signal and clock enabling signal switching on and shutting down control module control power supply chip are stopped, so that system closedown；In electricity When the system of sub- equipment is in off-mode, if switching on and shutting down trigger module receives start trigger action, switching on and shutting down control mould Block can start to work according to the start trigger signal driving power chip that switching on and shutting down trigger module is exported, so that system boot, So as to reliablely and stablely realize switching on and shutting down control to electronic equipment, solving can not both ensure out present in the prior art The reliability and stability of shutdown control, and can realize the problem of miniaturization of circuit is with low cost.

Brief description of the drawings

Fig. 1 is the function structure chart of the switching on and shutting down control circuit for the electronic equipment that first embodiment of the invention provides；

Fig. 2 is another function structure chart of the switching on and shutting down control circuit for the electronic equipment that first embodiment of the invention provides；

Fig. 3 is the exemplary circuit structure chart of the switching on and shutting down control circuit shown in Fig. 1；

Fig. 4 is another exemplary circuit structure chart of the switching on and shutting down control circuit shown in Fig. 1；

Fig. 5 is the exemplary circuit structure chart of the switching on and shutting down control circuit shown in Fig. 2；

Fig. 6 is another exemplary circuit structure chart of the switching on and shutting down control circuit shown in Fig. 2；

Fig. 7 is the function structure chart of the switching on and shutting down control circuit for the electronic equipment that second embodiment of the invention provides；

Fig. 8 is another function structure chart of the switching on and shutting down control circuit for the electronic equipment that second embodiment of the invention provides；

Fig. 9 is the exemplary circuit structure chart of the switching on and shutting down control circuit shown in Fig. 7；

Figure 10 is another exemplary circuit structure chart of the switching on and shutting down control circuit shown in Fig. 7；

Figure 11 is the exemplary circuit structure chart of the switching on and shutting down control circuit shown in Fig. 8；

Figure 12 is another exemplary circuit structure chart of the switching on and shutting down control circuit shown in Fig. 8.

Embodiment

In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.

Embodiment one：

In the first embodiment of the invention, the modular structure of the switching on and shutting down control circuit of electronic equipment is as shown in Figure 1, this hair The switching on and shutting down control circuit that bright first embodiment provides includes controller 100 and power supply chip 200, and controller 100 is common Microcontroller, arm processor, MIPS processors, POWER processors or other possess the programmable control of mathematical logic disposal ability Device processed；Power supply chip 200 is common DC-DC converter.When system electrification in the electronic device starts, on controller 100 Electricity, and the first input/output terminal IO1 and the second input/output terminal IO2 of controller 100 are that high-impedance state or input state (control The the first input/output terminal IO1 and the second input/output terminal IO2 of device 100 do not export any signal, but can receive exterior transmission The signal to come over)；The power end Vcc and ground terminal GND of power supply chip 200 connect DC power supply VCC respectively, and (it can be 12V DC Power supply) and ground, the Enable Pin EN of power supply chip 200 is effective for high level, i.e.,：When the Enable Pin EN of power supply chip 200 is received During high level, the output terminal OUT output system voltages VCC_SYS of power supply chip 200 makes the system boot in electronic equipment, control Device 100 powers on therewith；When the Enable Pin EN of power supply chip 200 receives low level, power supply chip 200 stops output system electricity Pressure VCC_SYS makes the system closedown in electronic equipment, and controller 100 is electric under.

Switching on and shutting down control circuit further includes switching on and shutting down trigger module 300, switching on and shutting down control module 400 and power module 500.

The power end of switching on and shutting down trigger module 300 is connected to power module 500 altogether with the power end of switching on and shutting down control module 400 Output terminal, the signal bidirectional end and output terminal of switching on and shutting down trigger module 300 connect the first input and output of controller 100 respectively The clock end of IO1 and switching on and shutting down control module 400 is held, is between the signal bidirectional end and output terminal of switching on and shutting down trigger module 300 Connection, the second input/output terminal IO2 of the signal end connection controller 100 of switching on and shutting down control module 400, switching on and shutting down control mould The Enable Pin EN of the output terminal connection power supply chip 200 of block 400.

When system electrification in the electronic device starts, if switching on and shutting down trigger module 300 is in first time period (such as 2 seconds) Start trigger action is inside persistently received, then switching on and shutting down trigger module 300 continues the to controller 100 in first time period The clock end of one input/output terminal IO1 and switching on and shutting down control module 400 output start trigger signal (it can be high level), switch Machine control module exports high level to the Enable Pin EN of power supply chip 200 according to the start trigger signal, and power supply chip 200 is therewith Output system voltage VCC_SYS makes system boot.

When system in the electronic device is in open state, if switching on and shutting down trigger module 300 in second time period (such as 3 seconds) in persistently receive shutdown trigger action, then switching on and shutting down trigger module 300 continues to controller 100 in second time period The first input/output terminal IO1 and switching on and shutting down control module 400 clock end output shutdown trigger signal (it can be high level), (it can for lasting output control signal in the first preset time period (such as 100 milliseconds) according to the shutdown trigger signal for controller 100 For high level) to the signal end of switching on and shutting down control module 400, and in the output time of the control signal reach the first preset time During half (such as 100 milliseconds of the half, i.e., 50 milliseconds) of section, the first input/output terminal IO1 of controller 100 is when second is default Between persistently export clock signal (it can be high level) in section (such as 20 milliseconds), which passes through switching on and shutting down trigger module 300 outputs are to the clock end of switching on and shutting down control module 400, and switching on and shutting down control module 400 is according to above-mentioned control signal and clock For signal output low level to the Enable Pin EN of power supply chip 200, power supply chip 200 stops output system voltage VCC_SYS therewith So that system closedown, controller 100 also can be electric under, i.e., controller 100 is stopped at this time.

When system in the electronic device is in off-mode, if switching on and shutting down trigger module 300 receives start triggering Action, then the first input/output terminal IO1 from switching on and shutting down trigger module 300 to controller 100 and switching on and shutting down control module 400 when Clock end output start trigger signal (it can be high level), switching on and shutting down control module export high level according to the start trigger signal To the Enable Pin EN of power supply chip 200, power supply chip 200 therewith output system voltage VCC_SYS so that system boot, controller 100 also power on therewith.

In addition, when system in the electronic device starts, in order to avoid sending mistake to switching on and shutting down trigger module 300 because of user Start trigger action by mistake, so, in the first embodiment of the invention, if opening received by switching on and shutting down trigger module 300 Machine trigger action does not occur persistently in first time period (such as 2 seconds), then controller 100 still can be in the first preset time period Above-mentioned control signal (it can be high level) is persistently exported in (such as 100 milliseconds) to the signal end of switching on and shutting down control module 400, And when the output time of the control signal reaches half (such as 100 milliseconds of the half, i.e., 50 milliseconds) of the first preset time period, First input/output terminal IO1 of controller 100 persistently exports clock signal in the second preset time period (such as 20 milliseconds), and (it can For high level), which is exported to the clock end of switching on and shutting down control module 400, switch by switching on and shutting down trigger module 300 Machine control module 400 exports low level to the Enable Pin EN of power supply chip 200 according to above-mentioned control signal and clock signal, with System is remained turned off state, so as to achieve the purpose that to avoid opening by mistake machine, improve switching on and shutting down control accuracy.

When system in the electronic device is in off-mode, since controller 100 is lower electric, if switching on and shutting down are touched at this time Hair module 300 receives start trigger action, then switching on and shutting down trigger module 300 can export above-mentioned start trigger signal to control First input/output terminal IO1 of device 100 and the clock end of switching on and shutting down control module 400, but because of the circuit meeting inside controller 100 Above-mentioned start trigger signal is dragged down by the first input/output terminal IO1, and due to the signal of switching on and shutting down trigger module 300 Bidirectional end is connected with output terminal, so thus influencing whether received by the clock end of switching on and shutting down control module 400 Start shooting trigger signal, and then make switching on and shutting down control module 400 can not driven power supply chip 200 work, so as to cause to start shooting Failure.In order to solve this problem, above-mentioned switching on and shutting down control circuit can further include isolation module 600, such as Fig. 2 institutes Show, the output terminal of the voltage detecting end connection power supply chip 200 of isolation module 600, the first end and second end of isolation module 600 The first input/output terminal IO1 of controller 100 and the signal bidirectional end of switching on and shutting down trigger module 300 are connected respectively；When electronics is set When system in standby is in open state, the system voltage VCC_SYS that isolation module 600 is exported according to power supply chip 200 is real Now close, so that the first input/output terminal IO1 of controller 100 is connected with the signal bidirectional end of switching on and shutting down trigger module 300； When the system in electronic equipment is in off-mode, isolation module 600 is because power supply chip 200 is without system voltage output and to control Implement to disconnect between first input/output terminal IO1 of device 100 processed and the signal bidirectional end of switching on and shutting down trigger module 300 to isolate, from And make influence of the start trigger signal from the controller 100 of lower electricity, ensure that the system of electronic equipment being capable of normal boot-strap.

Further, the switching on and shutting down control circuit shown in corresponding diagram 1, as shown in figure 3, switching on and shutting down trigger module 300 includes：

First resistor R1, key switch SW1, second resistance R2, the first capacitance C1 and 3rd resistor R3；

The first end of first resistor R1 is the power end of switching on and shutting down trigger module 300, and the second end of first resistor R1 connects The first end of key switch SW1, the first end of second resistance R2 are the signal bidirectional end of switching on and shutting down trigger module 300, and button is opened The second end and the second end, the first end of the first capacitance C1 and the first end of 3rd resistor R3 of second resistance R2 for closing SW1 are total to Connect the output terminal that the common contact to be formed is switching on and shutting down trigger module 300, the second end of the first capacitance C1 and 3rd resistor R3's Second end is grounded.It was found from the internal structure of above-mentioned switching on and shutting down trigger module 300, the start triggering mentioned in foregoing teachings Action and shutdown trigger action be as user by push button switch SW1 made by, be pressed in key switch SW1 When, the voltage that power module 500 is exported forms start trigger signal by first resistor R1 and key switch SW1 or shutdown is touched Signal, trigger signal of starting shooting or shutdown trigger signal are divided into two-way, are exported all the way by second resistance R2 to controller 100 First input/output terminal IO1, another way are exported to the clock end of switching on and shutting down control module 400.

Further, the switching on and shutting down control circuit shown in corresponding diagram 1, as shown in figure 3, switching on and shutting down control module 400 includes：

4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the first NPN type triode Q1, the first D are touched Send out device U1, the 8th resistance R8, the second capacitance C2, the 9th resistance R9, the tenth resistance R10 and the second NPN type triode Q2；

The first end of 4th resistance R4 and the first end of the tenth resistance R10 are connected to DC power supply VCC altogether, and (it can be that 12V is straight Galvanic electricity source), the common contact of the second end of the 4th resistance R4 and the first end of the 5th resistance R5 is connected the of the 6th resistance R6 at the same time One end and the first end of the 8th resistance R8, the second end ground connection of the 5th resistance R5, second end and the first NPN type of the 6th resistance R6 The first end that the collector of triode Q1 is connected to the signal input pin D, the 7th resistance R7 of the first d type flip flop U1 altogether is switching on and shutting down control The signal end of molding block 400, the second end of the 7th resistance R7 connect the base stage of the first NPN type triode Q1, three pole of the first NPN type The emitter ground connection of pipe Q1, the clock signal foot CP of the first d type flip flop U1 are the clock end of switching on and shutting down control module 400, the first D The set foot of trigger U1With the power end that the common contact of supply pin Vcc is switching on and shutting down control module 400, the first d type flip flop The clearing foot of U1It is connected to the first end of the second capacitance C2, the second termination of the second capacitance C2 altogether with the second end of the 8th resistance R8 Ground, the same phase output pin Q skies of the first d type flip flop U1 connect, and the lower margin GND ground connection of the first d type flip flop U1, the 9th resistance R9 is connected to The anti-phase output foot of first d type flip flop U1Between the base stage of the second NPN type triode Q2, the second NPN type triode Q2's Emitter is grounded, and the second end of the tenth resistance R10 and the common contact of the collector of the second NPN type triode Q2 control for switching on and shutting down The output terminal of module 400.

Further, the switching on and shutting down control circuit shown in corresponding diagram 1, as shown in figure 3, power module 500 includes：

11st resistance R11, zener diode D1 and the 3rd capacitance C3；

The first end connection DC power supply VCC (it can be 12V DC power supply) of 11st resistance R11, the 11st resistance R11 The cathode of second end and zener diode D1 and the first end of the 3rd capacitance C3 to connect the common contact to be formed altogether be power supply mould The second end of the output terminal of block 500, the anode of zener diode D1 and the 3rd capacitance C3 are grounded.

In addition, the switching on and shutting down control circuit shown in corresponding diagram 1, as shown in figure 4, power module 500 can also possess it is another Kind structure, it includes：

12nd resistance R12, low pressure difference linear voltage regulator LDO and the 4th capacitance C4；

The first end connection DC power supply VCC (it can be 12V DC power supply) of 12nd resistance R12, the 12nd resistance R12 The first end of second end and low pressure difference linear voltage regulator LDO and the first end of the 4th capacitance C4 connect the common contact to be formed altogether For the output terminal of power module 500, the second end of the second end of low pressure difference linear voltage regulator LDO and the 4th capacitance C4 are grounded.

In addition, as can be seen from Figure 2, Fig. 3 and the switching on and shutting down control circuit shown in Fig. 4 can also include the isolation mode shown in Fig. 2 Block 600, respectively as shown in Fig. 5 (corresponding diagram 3) and Fig. 6 (corresponding diagram 4), isolation module 600 wraps the internal structure of isolation module 600 Include：

13rd resistance R13, the 14th resistance R14 and electrical isolation device K1；

The first end of 13rd resistance R13 be isolation module 600 voltage detecting end, the second end of the 13rd resistance R13 It is connected to the control terminal of electrical isolation device K1, the second termination of the 14th resistance R14 altogether with the first end of the 14th resistance R14 Ground, the normally opened contact and switch contact of electrical isolation device K1 are respectively the first end and second end of isolation module 600.Wherein, Electrical isolation device K1 can be specifically relay.

Since the operation principle of the switching on and shutting down control circuit shown in Fig. 3 and Fig. 4 is identical, both the difference is that only power supply The internal structure of module 500, and the operation principle of the switching on and shutting down control circuit shown in Fig. 5 and Fig. 6 is also identical, relative to Fig. 3 and Isolation module 600 is added in Fig. 4, Fig. 5 and Fig. 6, so, first the switching on and shutting down shown in Fig. 3 are controlled with reference to operation principle below Circuit is described further：

When the system electrification of electronic equipment starts, zener diode D1 powers for the first d type flip flop U1, the first D triggerings The clearing foot of device U1Slowly started by the second capacitance C2, so that the clearing foot of the first d type flip flop U1With set foot's Logical value is respectively 0 and 1 (i.e.), so, according to the logic function table of following d type flip flop：

The anti-phase output foot of first d type flip flop U1Export as 0, so the second NPN type triode Q2 ends, power supply chip 200 enabled foot EN is high level, then the start-up operation of power supply chip 200 and output system voltage VCC_SYS, and then make system just Often start.Controller 100 powers on therewith, and makes its first input/output terminal IO1 and the second input/output terminal IO2 be high-impedance state Or the clearing foot of input state, then the first d type flip flop U1Set footAnd the logical value of signal input pin D is respectively 1,1,1 (i.e. D=1), since the clock signal foot CP of the first d type flip flop U1 at this time is not received by any signal, so CP For X, therefore the anti-phase output foot of the first d type flip flop U1Output state remain unchanged (be 0), power supply chip 200 continues work Make.If user's imprudence, which pushes button switch SW1, the clock signal foot CP of the first d type flip flop U1, at this time can receive height Level (logical value 1, CP=1), according to above-mentioned logic function table, the anti-phase output foot of the first d type flip flop U1Output 0 is remained as, so so as to which the second NPN type triode Q2 keeps cut-off state, the Enable Pin EN of power supply chip 200 remains as high electricity Put down, then system worked well.

When system electrification starts, the first input/output terminal IO1 of controller 100 can be detected to be sent out by key switch SW1 The high level signal (i.e. above-mentioned start trigger signal) brought simultaneously starts timing, if key switch SW1 is pressed the time not To 2 seconds (i.e. above-mentioned first time period), then the high level time of IO1 continued less than 2 seconds, and controller 100 can be second defeated by it Enter output terminal IO2 and persistently export high level (i.e. above-mentioned control signal) in 100ms (the first i.e. above-mentioned preset time period), Then the first NPN type triode Q1 is turned at this time, and the current potential of the signal input pin D of d type flip flop is dragged down, so signal input pin The logical value of D is 0 (i.e. D=0)；Reach 50ms (the one of the first i.e. above-mentioned preset time period in the time of IO2 output high level Half) after, controller 100 persistently exports high level (i.e. above-mentioned clock signal) by the first input and output foot IO1 in 20ms By the clock signal foot CP of second resistance R2 to the first d type flip flop U1, so, the clearing foot of the first d type flip flop U1 at this time Set footAnd the logical value of signal input pin D is respectively 1,1 and 0 (i.e.D=0), and CP has high level to touch Send out, then the anti-phase output foot of the first d type flip flop U1Export high level (i.e.), then the second NPN type triode Q2 is turned on, And drag down the current potential of the Enable Pin EN of power supply chip 200, then power supply chip 200 is stopped and not output system voltage VCC_ SYS, system cannot be started up.If the time that key switch SW1 is pressed is for 2 seconds, the first input and output of controller 100 IO1 and the second input/output terminal IO2 is held to maintain high-impedance state or input state, the clock signal foot CP of the first d type flip flop U1 to receive To high level, and due to the clearing foot of the first d type flip flop U1Set footAnd the logical value of signal input pin D is respectively 1,1 And 1 (i.e.D=1), the anti-phase output foot of the first d type flip flop U1Export low level (i.e.), then second NPN type triode Q2 ends, and the Enable Pin EN of power supply chip 200 obtains high level, 200 output system voltage VCC_ of power supply chip SYS makes system normal boot-strap.

After system start completion and normal boot-strap, when key switch SW1 was persistently pressed in 3 seconds, controller 100 The first input/output terminal IO1 a high level (i.e. above-mentioned shutdown trigger signal) can be persistently received in 3 seconds, then control Device 100 can persistently export high level by its second input/output terminal IO2 in 100ms (the first i.e. above-mentioned preset time period) (i.e. above-mentioned control signal), then the first NPN type triode Q1 is turned at this time, and by the current potential of the signal input pin D of d type flip flop Drag down, so the logical value of signal input pin D is 0 (i.e. D=0), it is (i.e. above-mentioned to reach 50ms in the time of IO2 output high level The first preset time period half) after, the lasting high electricity of output in 20ms by the first input and output foot IO1 of controller 100 The flat clock signal foot CP of (i.e. above-mentioned clock signal) by second resistance R2 to the first d type flip flop U1, so, at this time first The clearing foot of d type flip flop U1Set footAnd the logical value of signal input pin D is respectively 1,1 and 0 (i.e.D =0), and CP has high level triggering, then the anti-phase output foot of the first d type flip flop U1Export high level (i.e.), then Two NPN type triode Q2 are turned on, and the current potential of the Enable Pin EN of power supply chip 200 is dragged down, then power supply chip 200 is stopped And output system voltage VCC_SYS, system closedown, controller 100 be not electric under.After system closedown, except the first D is triggered Device U1 is kept powered on outside work, and remaining circuit is stopped, and so as to be effectively reduced power consumption, the power consumption of electronic equipment can Less than 0.2 watt, it is far smaller than the power consumption requirements of European Union ERP (Energy-related Products, energy Related product) 0.5 watt, therefore energy-saving and environment-friendly purpose can be reached, and ensure that follow-up start control can be normally carried out.

When system is in off-mode, if key switch SW1 is pressed, the clock signal of the first d type flip flop U1 Foot CP obtains high level triggering, and due to 100 times electricity of controller, the current potential of the signal input pin D of the first d type flip flop U1 is pulled up, So D=1, andTherefore the anti-phase output foot of the first d type flip flop U1Output state flip be low level, thenSo the second NPN type triode Q2 ends, the Enable Pin EN of power supply chip 200 is changed into high level, and power supply chip 200 is just Normal output system voltage VCC_SYS, then system start normal operation, start shooting successfully, controller 100 also powers on therewith.

Since Fig. 5 is that isolation module 600 is added on the basis of Fig. 3, below for the isolation module in Fig. 5 600 operation principle illustrates：

When system is in off-mode, since controller 100 is lower electric, if pushing button switch SW1 at this time, do not having In the case of having isolation module 600, the high level (i.e. above-mentioned start trigger signal) that key switch SW1 is sent out is by What two resistance R2 were directly connected with the first input/output terminal IO1 of controller 100, the circuit inside controller 100 can incite somebody to action at this time The high level drags down, so that the clock signal foot CP of the first d type flip flop U1 is pulled low, then can cause the first d type flip flop U1 Anti-phase output footOutput state can not overturn as low level (i.e.), but always remain as high level (i.e. ), then the current potential of the Enable Pin EN of power supply chip 200 is pulled low, power supply chip 200 can not output system voltage so that cause be System boot failure.And for having added the switching on and shutting down control circuit of isolation module 600 in Fig. 5, when system is in open state, The system voltage VCC_SYS that 13rd resistance R13 and the 14th resistance R14 export power supply chip 200 carries out partial pressure, electronics Isolating device K1 is realized according to gained partial pressure and closed, so that key switch SW1 passes through second resistance R2 and electrical isolation device Part K1 is directly connected with controller 100；And when system is in off-mode, power supply chip 200 stops output system voltage VCC_SYS, then the voltage of the control terminal of electrical isolation device K1 is also 0, and electrical isolation device K1 is disconnected therewith, so that button is opened Close SW1 and disconnected with controller 100 and isolated, so that ensure influence of the trigger signal from the controller 100 of lower electricity of starting shooting, and energy Enough ensure system normal boot-strap.

In order to make system still can be worked normally in fast insert-pull, the clearing foot of the first d type flip flop U1Can be by the 4th Resistance R4 and the 5th resistance R5 carries out partial pressure to 12V DC power supply (i.e. above-mentioned DC power supply VCC), the first d type flip flop U1's Set footPowered by zener diode D1, so that the clearing foot of the first d type flip flop U1Voltage decrease speed is than set footIt hurry up, ensureState, then d type flip flop anti-phase output footExport as low level (i.e.), ensure electricity Source chip 200 is started to work, and system normally starts.

Embodiment two：

In second embodiment of the invention, the modular structure of the switching on and shutting down control circuit of electronic equipment is as shown in fig. 7, this hair The switching on and shutting down control circuit that bright second embodiment provides includes controller 100 and power supply chip 200, and controller 100 is common Microcontroller, arm processor, MIPS processors, POWER processors or other possess the programmable control of mathematical logic disposal ability Device processed；Power supply chip 200 is common DC-DC converter.When system electrification in the electronic device starts, on controller 100 Electricity, and the first input/output terminal IO1 and the second input/output terminal IO2 of controller 100 are that high-impedance state or input state (control The the first input/output terminal IO1 and the second input/output terminal IO2 of device 100 do not export any signal, but can receive exterior transmission The signal to come over)；The power end Vcc and ground terminal GND of power supply chip 200 connect DC power supply VCC respectively, and (it can be 12V DC Power supply) and ground, the Enable Pin EN of power supply chip 200 is effective for low level, i.e.,：When the Enable Pin of power supply chip 200Receive During low level, the output terminal OUT output system voltages VCC_SYS of power supply chip 200 makes the system boot in electronic equipment, control Device 100 powers on therewith；When the Enable Pin of power supply chip 200When receiving high level, power supply chip 200 stops output system Voltage VCC_SYS makes the system closedown in electronic equipment, and controller 100 is electric under.

The power end of switching on and shutting down trigger module 300 is connected to power module 500 altogether with the power end of switching on and shutting down control module 400 Output terminal, the signal bidirectional end and output terminal of switching on and shutting down trigger module 300 connect the first input and output of controller 100 respectively The clock end of IO1 and switching on and shutting down control module 400 is held, is between the signal bidirectional end and output terminal of switching on and shutting down trigger module 300 Connection, the second input/output terminal IO2 of the signal end connection controller 100 of switching on and shutting down control module 400, switching on and shutting down control mould The Enable Pin of the output terminal connection power supply chip 200 of block 400

When system electrification in the electronic device starts, if switching on and shutting down trigger module 300 is in first time period (such as 2 seconds) Start trigger action is inside persistently received, then switching on and shutting down trigger module 300 continues the to controller 100 in first time period The clock end of one input/output terminal IO1 and switching on and shutting down control module 400 output start trigger signal (it can be high level), switch Machine control module exports low level to the Enable Pin of power supply chip 200 according to the start trigger signalPower supply chip 200 with Output system voltage make system boot.

When system in the electronic device is in open state, if switching on and shutting down trigger module 300 in second time period (such as 3 seconds) in persistently receive shutdown trigger action, then switching on and shutting down trigger module 300 continues to controller 100 in second time period The first input/output terminal IO1 and switching on and shutting down control module 400 clock end output shutdown trigger signal (it can be high level), (it can for lasting output control signal in the first preset time period (such as 100 milliseconds) according to the shutdown trigger signal for controller 100 For high level) to the signal end of switching on and shutting down control module 400, and in the output time of the control signal reach the first preset time During half (such as 100 milliseconds of the half, i.e., 50 milliseconds) of section, the first input/output terminal IO1 of controller 100 is when second is default Between persistently export clock signal (it can be high level) in section (such as 20 milliseconds), which passes through switching on and shutting down trigger module 300 outputs are to the clock end of switching on and shutting down control module 400, and switching on and shutting down control module 400 is according to above-mentioned control signal and clock Signal output high level to power supply chip 200 Enable PinPower supply chip 200 stops output system voltage so as to be therewith System shutdown, controller 100 also can be electric under, i.e., controller 100 is stopped at this time.

When system in the electronic device is in off-mode, if switching on and shutting down trigger module 300 receives start triggering Action, then the first input/output terminal IO1 from switching on and shutting down trigger module 300 to controller 100 and switching on and shutting down control module 400 when Clock end output start trigger signal (it can be high level), switching on and shutting down control module 400 export low according to the start trigger signal Level to power supply chip 200 Enable PinPower supply chip 200 therewith output system voltage so that system boot, controller 100 also power on therewith.

In addition, when system in the electronic device starts, in order to avoid sending mistake to switching on and shutting down trigger module 300 because of user Start trigger action by mistake, so, in second embodiment of the invention, if opening received by switching on and shutting down trigger module 300 Machine trigger action does not occur persistently in first time period (such as 2 seconds), then controller 100 still can be in the first preset time period Above-mentioned control signal (it can be high level) is persistently exported in (such as 100 milliseconds) to the signal end of switching on and shutting down control module 400, And when the output time of the control signal reaches half (such as 100 milliseconds of the half, i.e., 50 milliseconds) of the first preset time period, First input/output terminal IO1 of controller 100 persistently exports clock signal in the second preset time period (such as 20 milliseconds), and (it can For high level), which is exported to the clock end of switching on and shutting down control module 400, switch by switching on and shutting down trigger module 300 Machine control module 400 exports high level to the Enable Pin of power supply chip 200 according to above-mentioned control signal and clock signal So that system remains turned off state, so as to achieve the purpose that to avoid opening by mistake machine, switching on and shutting down control accuracy is improved.

When system in the electronic device is in off-mode, since controller 100 is lower electric, if switching on and shutting down are touched at this time Hair module 300 receives start trigger action, then switching on and shutting down trigger module 300 can export above-mentioned start trigger signal to control First input/output terminal IO1 of device 100 and the clock end of switching on and shutting down control module 400, but because of the circuit meeting inside controller 100 Above-mentioned start trigger signal is dragged down by the first input/output terminal IO1, and due to the signal of switching on and shutting down trigger module 300 Bidirectional end is connected with output terminal, so thus influencing whether received by the clock end of switching on and shutting down control module 400 Start shooting trigger signal, and then make switching on and shutting down control module 400 can not driven power supply chip 200 work, so as to cause to start shooting Failure.In order to solve this problem, above-mentioned switching on and shutting down control circuit can further include isolation module 600, such as Fig. 8 institutes Show, the output terminal of the voltage detecting end connection power supply chip 200 of isolation module 600, the first end and second end of isolation module 600 The first input/output terminal IO1 of controller 100 and the signal bidirectional end of switching on and shutting down trigger module 300 are connected respectively；When electronics is set When system in standby is in open state, the system voltage that isolation module 600 is exported according to power supply chip 200 realizes closure, So that the first input/output terminal IO1 of controller 100 is connected with the signal bidirectional end of switching on and shutting down trigger module 300；Work as electronics When system in equipment is in off-mode, isolation module 600 is because power supply chip 200 is without system voltage output and to controller Implement to disconnect between 100 the first input/output terminal IO1 and the signal bidirectional end of switching on and shutting down trigger module 300 to isolate, so that Trigger signal of starting shooting ensures that the system of electronic equipment being capable of normal boot-strap from the influence of the controller 100 of lower electricity.

In second embodiment of the invention, corresponding diagram 7, Fig. 9 and Figure 10 respectively illustrate the example of switching on and shutting down control circuit Circuit structure, wherein, the internal structure of switching on and shutting down trigger module 300 and power module 500 is identical shown in Fig. 3 and Fig. 4, Therefore repeat no more.For switching on and shutting down control module 400, as shown in Figure 9 and Figure 10, it includes：

15th resistance R15, the 16th resistance R16, the 17th resistance R17, the 18th resistance R18, three pole of the 3rd NPN type Pipe Q3, the second d type flip flop U2, the 19th resistance R19, the second capacitance C2, the 20th resistance R20, the 21st resistance R21 and 4th NPN type triode Q4；

The first end of 15th resistance R15 and the first end of the 21st resistance R21 are connected to DC power supply VCC altogether, and (it can For 12V DC power supply), the common contact of the second end of the 15th resistance R15 and the first end of the 16th resistance R16 is connected the at the same time The first end of 17 resistance R17 and the first end of the 19th resistance R19, the second end ground connection of the 16th resistance R16, the 17th electricity The collector for hindering second end and the 3rd NPN type triode Q3 of R17 is connected to the signal input pin D of the second d type flip flop U2 altogether, and the tenth The first end of eight resistance R18 is the signal end of switching on and shutting down control module 400, and the second end of the 18th resistance R18 connects the 3rd NPN The base stage of type triode Q3, the emitter ground connection of the 3rd NPN type triode Q3, the clock signal foot CP of the second d type flip flop U2 are The clock end of switching on and shutting down control module 400, the set foot of the second d type flip flop U2Common contact with supply pin Vcc is switching on and shutting down The power end of control module 400, the clearing foot of the second d type flip flop U2The second electricity is connected to altogether with the second end of the 19th resistance R19 Hold the first end of C2, the second end ground connection of the second capacitance C2, the anti-phase output foot of the second d type flip flop U2Sky connects, the 2nd D triggerings The lower margin GND ground connection of device U2, the 20th resistance R20 are connected to the same phase output pin Q and the 4th NPN type three of the second d type flip flop U2 Between the base stage of pole pipe Q4, the emitter ground connection of the 4th NPN type triode Q4, the second end and the 4th of the 21st resistance R21 The common contact of the collector of NPN type triode Q4 is the output terminal of switching on and shutting down control module 400.

In addition, as it can be observed in the picture that the switching on and shutting down control circuit shown in Fig. 9 and Figure 10 can also include the isolation mode shown in Fig. 8 Block 600, as shown in Figure 11 (corresponding diagram 9) and Figure 12 (corresponding diagram 10), shown in the internal structure and Fig. 5 and Fig. 6 of isolation module 600 It is identical, therefore repeat no more.

Since the operation principle of the switching on and shutting down control circuit shown in Fig. 9 and Figure 10 is identical, both the difference is that only electricity The internal structure of source module 500, and the operation principle of the switching on and shutting down control circuit shown in Figure 11 and Figure 12 is also identical, relative to figure 9 and Figure 10, Figure 11 and Figure 12 in add isolation module 600, so, below first with reference to operation principle to the switch shown in Fig. 9 Machine control circuit is described further：

When the system electrification of electronic equipment starts, zener diode D1 powers for the second d type flip flop U2, the 2nd D triggerings The clearing foot of device U2Slowly started by the second capacitance C2, so that the clearing foot of the second d type flip flop U2With set foot's Logical value is respectively 0 and 1 (i.e.), so, according to a first embodiment of the present invention provided in d type flip flop Logic function table, the same phase output pin Q outputs of the second d type flip flop U2 are 1, so the 4th NPN type triode Q4 is turned on, power supply core The enabled foot of piece 200For low level, then power supply chip 200 is started to work and output system voltage VCC_SYS, so make be System is normal to be started.Controller 100 powers on therewith, and makes its first input/output terminal IO1 and the second input/output terminal IO2 be height Resistance state or the clearing foot for inputting state, then the second d type flip flop U2Set footAnd the logical value of signal input pin D is respectively 1,1, 1 (i.e.D=1), since the clock signal foot CP of the second d type flip flop U2 at this time is not received by any signal, So CP is X, therefore the output state of the same phase output pin Q of the second d type flip flop U2 remains unchanged (being 1), power supply chip 200 after Continuous work.If user's imprudence, which pushes button, at this time switchs SW1, the clock signal foot CP of the second d type flip flop U2 can be received To high level (logical value 1, CP=1), according to above-mentioned logic function table, the same phase output pin Q's of the second d type flip flop U2 is defeated Go out to remain as 1, so the 4th NPN type triode Q4 is tended to remain on, the Enable Pin EN of power supply chip 200 remains as low electricity Put down, then system worked well.

When system electrification starts, the first input/output terminal IO1 of controller 100 can be detected to be sent out by key switch SW1 The high level signal (i.e. above-mentioned start trigger signal) brought simultaneously starts timing, if key switch SW1 is pressed the time not To 2 seconds (i.e. above-mentioned first time period), then the high level time of IO1 continued less than 2 seconds, and controller 100 can be second defeated by it Enter output terminal IO2 and persistently export high level (i.e. above-mentioned control signal) in 100ms (the first i.e. above-mentioned preset time period), Then the 3rd NPN type triode Q3 is turned at this time, and the current potential of the signal input pin D of d type flip flop is dragged down, so signal input pin The logical value of D is 0 (i.e. D=0)；Reach 50ms (the one of the first i.e. above-mentioned preset time period in the time of IO2 output high level Half) after, controller 100 persistently exports high level (i.e. above-mentioned clock signal) by the first input and output foot IO1 in 20ms By the clock signal foot CP of second resistance R2 to the second d type flip flop U2, so, the clearing foot of the second d type flip flop U2 at this time Set footAnd the logical value of signal input pin D is respectively 1,1 and 0 (i.e.D=0), and CP has high level to touch The same phase output pin Q output low levels (i.e. Q=0) of hair, then the second d type flip flop U2, then the 4th NPN type triode Q4 cut-offs, And by the Enable Pin of power supply chip 200Current potential draw high, then power supply chip 200 is stopped and not output system voltage VCC_SYS, system cannot be started up.If the time that key switch SW1 is pressed is for 2 seconds, the first input of controller 100 Output terminal IO1 and the second input/output terminal IO2 maintains high-impedance state or input state, the clock signal foot CP meetings of the second d type flip flop U2 High level is received, and due to the clearing foot of the second d type flip flop U2Set footAnd the logical value of signal input pin D is respectively 1st, 1 and 1 (i.e.D=1), the same phase output pin Q output high level (i.e. Q=1) of the second d type flip flop U2, then the Four NPN type triode Q4 are turned on, the Enable Pin of power supply chip 200Obtain low level, 200 output system voltage of power supply chip Make system normal boot-strap.

After system start completion and normal boot-strap, when key switch SW1 was persistently pressed in 3 seconds, controller 100 The first input/output terminal IO1 a high level (i.e. above-mentioned shutdown trigger signal) can be persistently received in 3 seconds, then control Device 100 can persistently export high level by its second input/output terminal IO2 in 100ms (the first i.e. above-mentioned preset time period) (i.e. above-mentioned control signal), then the 3rd NPN type triode Q3 is turned at this time, and by the current potential of the signal input pin D of d type flip flop Drag down, so the logical value of signal input pin D is 0 (i.e. D=0), it is (i.e. above-mentioned to reach 50ms in the time of IO2 output high level The first preset time period half) after, the lasting high electricity of output in 20ms by the first input and output foot IO1 of controller 100 The flat clock signal foot CP of (i.e. above-mentioned clock signal) by second resistance R2 to the second d type flip flop U2, so, at this time second The clearing foot of d type flip flop U2Set footAnd the logical value of signal input pin D is respectively 1,1 and 0 (i.e.D =0), and CP has high level triggering, then the same phase output pin Q output low levels (i.e. Q=0) of the second d type flip flop U2, and then the 4th NPN type triode Q4 ends, and by the Enable Pin of power supply chip 200Current potential draw high, then power supply chip 200 is stopped And output system voltage VCC_SYS, system closedown, controller 100 be not electric under.After system closedown, except the 2nd D is triggered Device U2 is kept powered on outside work, and remaining circuit is stopped, and so as to be effectively reduced power consumption, the power consumption of electronic equipment can Less than 0.2 watt, it is far smaller than the power consumption requirements of European Union ERP (Energy-related Products, energy Related product) 0.5 watt, therefore energy-saving and environment-friendly purpose can be reached, and ensure that follow-up start control can be normally carried out.

When system is in off-mode, if key switch SW1 is pressed, the clock signal of the second d type flip flop U2 Foot CP obtains high level triggering, and due to 100 times electricity of controller, the current potential of the signal input pin D of the second d type flip flop U2 is pulled up, So D=1, andTherefore the output state flip of the same phase output pin Q of the second d type flip flop U2 is high level, then Q =1, so the 4th NPN type triode Q4 is turned on, the Enable Pin of power supply chip 200It is changed into low level, power supply chip 200 is just Normal output system voltage VCC_SYS, then system start normal operation, start shooting successfully, controller 100 also powers on therewith.

Since Figure 11 is that isolation module 600 is added on the basis of Fig. 9, below for the isolation mode in Figure 11 The operation principle of block 600 illustrates：

When system is in off-mode, since controller 100 is lower electric, if pushing button switch SW1 at this time, do not having In the case of having isolation module 600, the high level (i.e. above-mentioned start trigger signal) that key switch SW1 is sent out is by What two resistance R2 were directly connected with the first input/output terminal IO1 of controller 100, the circuit inside controller 100 can incite somebody to action at this time The high level drags down, so that the clock signal foot CP of the second d type flip flop U2 is pulled low, then can cause the second d type flip flop U2 The output state of same phase output pin Q can not overturn as high level (i.e. Q=1), but always remain as low level (i.e. Q=0), The then Enable Pin of power supply chip 200Current potential be driven high, power supply chip 200 can not output system voltage, so as to cause system Boot failure.And for having added the switching on and shutting down control circuit of isolation module 600 in Figure 11, when system is in open state, The system voltage VCC_SYS that 13rd resistance R13 and the 14th resistance R14 export power supply chip 200 carries out partial pressure, electronics Isolating device K1 is realized according to gained partial pressure and closed, so that key switch SW1 passes through second resistance R2 and electrical isolation device Part K1 is directly connected with controller 100；And when system is in off-mode, power supply chip 200 stops output system voltage VCC_SYS, then the voltage of the control terminal of electrical isolation device K1 is also 0, and electrical isolation device K1 is disconnected therewith, so that button is opened Close SW1 and disconnected with controller 100 and isolated, so that ensure influence of the trigger signal from the controller 100 of lower electricity of starting shooting, and energy Enough ensure system normal boot-strap.

In order to make system still can be worked normally in fast insert-pull, the clearing foot of the second d type flip flop U2Can be by the tenth Five resistance R15 and the 16th resistance R16 carry out 12V DC power supply (i.e. above-mentioned DC power supply VCC) partial pressure, the 2nd D triggerings The set foot of device U2Powered by zener diode D1, so that the clearing foot of the second d type flip flop U2Voltage decrease speed ratio Set footIt hurry up, ensure State, then the second d type flip flop U2 same phase output pin Q output be high level (i.e. Q= 1), ensure that power supply chip 200 is started to work, system normally starts.

In conclusion the embodiment of the present invention includes switching on and shutting down trigger module, switching on and shutting down control by using in the electronic device The switching on and shutting down control circuit of molding block and power module, its circuit structure is simple, cost is low and is conducive to minimize；Set in electronics When standby system is in open state, if switching on and shutting down trigger module persistently receives shutdown triggering in second time period and moves To make, then output control signal and clock enabling signal switching on and shutting down control module control power supply chip are stopped when controller can be poor, So that system closedown；When the system of electronic equipment is in off-mode, if switching on and shutting down trigger module receives start triggering Action, switching on and shutting down control module can start work according to the start trigger signal driving power chip that switching on and shutting down trigger module is exported Make, so that system boot, so as to reliablely and stablely realize switching on and shutting down control to electronic equipment, solves the prior art and deposited Can not only ensure switching on and shutting down control reliability and stability, but also can realize circuit miniaturization and low cost the problem of.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.

Claims

1. the switching on and shutting down control circuit of a kind of electronic equipment, it includes controller and power supply chip；System in the electronic device During electrifying startup, the controller powers on, and the first input/output terminal of the controller and the second input/output terminal are height Resistance state or input state；The power end and ground terminal of the power supply chip connect DC power supply and ground respectively, and the power supply chip makes Energy end is effective for high level；It is characterized in that：

The switching on and shutting down control circuit further includes switching on and shutting down trigger module, switching on and shutting down control module and power module；The switch The power end of machine trigger module and the power end of the switching on and shutting down control module are connected to the output terminal of the power module altogether, described The signal bidirectional end and output terminal of switching on and shutting down trigger module connect the first input/output terminal of the controller and described open respectively The clock end for control module of shutting down, connects between the signal bidirectional end and output terminal of the switching on and shutting down trigger module, described The signal end of switching on and shutting down control module connects the second input/output terminal of the controller, the output of the switching on and shutting down control module End connects the Enable Pin of the power supply chip；

When system electrification in the electronic equipment starts, if the switching on and shutting down trigger module continues in first time period Start trigger action is received, then the switching on and shutting down trigger module is persistently defeated to the first of the controller in first time period Enter the clock end output start trigger signal of output terminal and the switching on and shutting down control module, the switching on and shutting down control module is according to institute State start trigger signal and export high level to the Enable Pin of the power supply chip, output system voltage makes the power supply chip therewith System boot；

When system in the electronic equipment is in open state, if the switching on and shutting down trigger module is in second time period Shutdown trigger action is persistently received, then the switching on and shutting down trigger module continues to the controller in the second time period The first input/output terminal and the switching on and shutting down control module clock end output shutdown trigger signal, the controller is according to institute The signal end that shutdown trigger signal persistently outputs control signals to the switching on and shutting down control module in the first preset time period is stated, And when the output time of the control signal reaches the half of first preset time period, the first input of the controller Output terminal persistently exports clock signal in the second preset time period, and the clock signal is defeated by the switching on and shutting down trigger module Go out to the clock end of the switching on and shutting down control module, the switching on and shutting down control module and believed according to the control signal and the clock Number output low level to the power supply chip Enable Pin, the power supply chip stop output system voltage therewith so that system close Machine, the controller are also electric under；

When system in the electronic equipment is in off-mode, if the switching on and shutting down trigger module receives start triggering Action, then the first input/output terminal from the switching on and shutting down trigger module to the controller and the switching on and shutting down control module when Clock end output start trigger signal, the switching on and shutting down control module export high level to the electricity according to the start trigger signal The Enable Pin of source chip, the power supply chip therewith output system voltage so that system boot, the controller also power on therewith.

2. switching on and shutting down control circuit as claimed in claim 1, it is characterised in that the switching on and shutting down control circuit further includes isolation Module, the voltage detecting end of the isolation module connect the output terminal of the power supply chip, the first end of the isolation module and Second end connects the first input/output terminal of the controller and the signal bidirectional end of the switching on and shutting down trigger module respectively.

3. switching on and shutting down control circuit as claimed in claim 1 or 2, it is characterised in that the switching on and shutting down trigger module includes：

First resistor, key switch, second resistance, the first capacitance and 3rd resistor；

The first end of the first resistor is the power end of the switching on and shutting down trigger module, and the second end of the first resistor connects The first end of the key switch, the first end of the second resistance are the signal bidirectional end of the switching on and shutting down trigger module, institute State the second end of the key switch and second end of the second resistance, the first end of the first capacitance and 3rd resistor First end connect altogether the common contact to be formed be the switching on and shutting down trigger module output terminal, the second end of first capacitance and The second end of the 3rd resistor is grounded.

4. switching on and shutting down control circuit as claimed in claim 1 or 2, it is characterised in that the switching on and shutting down control module includes：

4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first NPN type triode, the first d type flip flop, the 8th resistance, Second capacitance, the 9th resistance, the tenth resistance R and the second NPN type triode；

The first end of 4th resistance and the first end of the tenth resistance are connected to DC power supply altogether, and the of the 4th resistance Two ends are connected the first end of the 6th resistance and the 8th resistance at the same time with the common contact of the first end of the 5th resistance First end, the second end ground connection of the 5th resistance, the second end of the 6th resistance and first NPN type triode Collector is connected to the signal input pin of first d type flip flop altogether, and the first end of the 7th resistance controls for the switching on and shutting down The signal end of module, the second end of the 7th resistance connect the base stage of first NPN type triode, first NPN type The emitter ground connection of triode, the clock signal foot of first d type flip flop are the clock end of the switching on and shutting down control module, institute The common contact of the set foot and supply pin of stating the first d type flip flop is the power end of the switching on and shutting down control module, and the first D is touched The second end of the clearings foot and the 8th resistance of sending out device is connected to the first end of second capacitance altogether, and the of second capacitance Two ends are grounded, and the same phase output pin sky of first d type flip flop connects, the lower margin ground connection of first d type flip flop, the 9th electricity Resistance is connected between the anti-phase output foot of first d type flip flop and the base stage of second NPN type triode, and described second The emitter ground connection of NPN type triode, the second end of the tenth resistance and being total to for the collector of second NPN type triode Contact is the output terminal of the switching on and shutting down control module.

5. switching on and shutting down control circuit as claimed in claim 2, it is characterised in that the isolation module includes：

13rd resistance, the 14th resistance and electrical isolation device；

The first end of 13rd resistance be the isolation module voltage detecting end, the second end of the 13rd resistance with The first end of 14th resistance is connected to the control terminal of the electrical isolation device, the second termination of the 14th resistance altogether Ground, the normally opened contact and switch contact of the electrical isolation device are respectively the first end and second end of the isolation module.

6. the switching on and shutting down control circuit of a kind of electronic equipment, it includes controller and power supply chip；System in the electronic device During electrifying startup, the controller powers on, and the first input/output terminal of the controller and the second input/output terminal are height Resistance state or input state；The power end and ground terminal of the power supply chip connect DC power supply and ground respectively, and the power supply chip makes Energy end is effective for low level；It is characterized in that：

When system electrification in the electronic equipment starts, if the switching on and shutting down trigger module continues in first time period Start trigger action is received, then the switching on and shutting down trigger module is persistently defeated to the first of the controller in first time period Enter the clock end output start trigger signal of output terminal and the switching on and shutting down control module, the switching on and shutting down control module is according to institute State start trigger signal and export low level to the Enable Pin of the power supply chip, output system voltage makes the power supply chip therewith System boot；

When system in the electronic equipment is in open state, if the switching on and shutting down trigger module is in second time period Shutdown trigger action is persistently received, then the switching on and shutting down trigger module continues to the controller in the second time period The first input/output terminal and the switching on and shutting down control module clock end output shutdown trigger signal, the controller is according to institute The signal end that shutdown trigger signal persistently outputs control signals to the switching on and shutting down control module in the first preset time period is stated, And when the output time of the control signal reaches the half of first preset time period, the first input of the controller Output terminal persistently exports clock signal in the second preset time period, and the clock signal is defeated by the switching on and shutting down trigger module Go out to the clock end of the switching on and shutting down control module, the switching on and shutting down control module and believed according to the control signal and the clock Number output high level to the power supply chip Enable Pin, the power supply chip stop output system voltage therewith so that system close Machine, the controller are also electric under；

When system in the electronic equipment is in off-mode, if the switching on and shutting down trigger module receives start triggering Action, then the first input/output terminal from the switching on and shutting down trigger module to the controller and the switching on and shutting down control module when Clock end output start trigger signal, the switching on and shutting down control module export low level to the electricity according to the start trigger signal The Enable Pin of source chip, the power supply chip therewith output system voltage so that system boot, the controller also power on therewith.

7. switching on and shutting down control circuit as claimed in claim 6, it is characterised in that the switching on and shutting down control circuit further includes isolation Module, the voltage detecting end of the isolation module connect the output terminal of the power supply chip, the first end of the isolation module and Second end connects the first input/output terminal of the controller and the signal bidirectional end of the switching on and shutting down trigger module respectively.

8. switching on and shutting down control circuit as claimed in claims 6 or 7, it is characterised in that the switching on and shutting down trigger module includes：

9. switching on and shutting down control circuit as claimed in claims 6 or 7, it is characterised in that the switching on and shutting down control module includes：

15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 3rd NPN type triode, the second d type flip flop, 19th resistance, the second capacitance, the 20th resistance, the 21st resistance and the 4th NPN type triode；

The first end of 15th resistance and the first end of the 21st resistance are connected to DC power supply altogether, and the described 15th The second end of resistance and the common contact of the first end of the 16th resistance be connected at the same time the 17th resistance first end and The first end of 19th resistance, the second end ground connection of the 16th resistance, the second end of the 17th resistance and institute The collector for stating the 3rd NPN type triode is connected to the signal input pin of second d type flip flop altogether, and the of the 18th resistance One end is the signal end of the switching on and shutting down control module, and the second end of the 18th resistance connects three pole of the 3rd NPN type The base stage of pipe, the emitter ground connection of the 3rd NPN type triode, the clock signal foot of second d type flip flop are opened to be described The clock end for control module of shutting down, the set foot of second d type flip flop and the common contact of supply pin control for the switching on and shutting down The power end of module, the clearing foot of second d type flip flop are connected to second electricity altogether with the second end of the 19th resistance The first end of appearance, the second end ground connection of second capacitance, the anti-phase output foot sky of second d type flip flop connect, the 2nd D triggerings The lower margin ground connection of device, the 20th resistance are connected to the same phase output pin of second d type flip flop and the 4th NPN type three Between the base stage of pole pipe, the emitter of the 4th NPN type triode ground connection, the second end of the 21st resistance with it is described The common contact of the collector of 4th NPN type triode is the output terminal of the switching on and shutting down control module.

10. switching on and shutting down control circuit as claimed in claim 7, it is characterised in that the isolation module includes：

13rd resistance, the 14th resistance and electrical isolation device；