CN102929163A - Power supply electronic switch circuit capable of being automatically controlled and completely powering off - Google Patents
Power supply electronic switch circuit capable of being automatically controlled and completely powering off Download PDFInfo
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- CN102929163A CN102929163A CN2012104155318A CN201210415531A CN102929163A CN 102929163 A CN102929163 A CN 102929163A CN 2012104155318 A CN2012104155318 A CN 2012104155318A CN 201210415531 A CN201210415531 A CN 201210415531A CN 102929163 A CN102929163 A CN 102929163A
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Abstract
The invention relates to a power supply electronic switch circuit capable of being automatically controlled and completely powering off, comprising a power supply electronic switch, an external signal source, an interface circuit, a program control circuit, a matching circuit, a driving circuit and an external direct-current power supply, wherein the external signal source can control the power supply electronic switch to be switched on and off; the interface circuit is matched with the external signal source to control the power supply electronic switch to be switched on and off; after the power supply electronic switch is switched on, the program control circuit outputs a control signal; the matching circuit is used for carrying out energy storage and signal matching; and the driving circuit is driven to control the power supply electronic switch to be switched on and off. According to the power supply electronic switch circuit, under the control of an external signal, the switching-on/off control of the power supply electronic switch can be reliably realized; and under the control of the program control circuit, one driving circuit is additionally arranged so that the power supply electronic switch can be reliably powered off when being automatically controlled; and the function of automatically switching off the power supply electronic switch can be operated normally under a low-power-supply voltage condition.
Description
Technical field
The present invention relates to electronic technology field, be specifically related to the fully power electronic switch circuit of outage of a kind of oneself's control.
Background technology
Its volume of power electronic switch circuit because is little, control convenient and be widely applied.
In the power electronic switch circuit, the break-make of power electronic switch is controlled by its control port signal, generally speaking, control signal supplier's power supply is not subjected to the control of power electronic switch, the power supply that is the control signal source still keeps power supply in the situation that power electronic switch disconnects, and this is inapplicable in handheld device and other low suppling voltages, low-power consumption application scenario.
Along with the progress of technology, the now power supply in control signal source can be controlled by power electronic switch.When power electronic switch disconnects, the control signal source is power supply not, can't provide excitation energy for power electronic switch, can only encourage by external signal, power electronic switch is connected, and the disconnection of power electronic switch after connection then can use programme control circut to control, and namely realizes oneself's control outage.Control in the power process the oneself, disconnection process along with power electronic switch, internal power supply voltage progressively descends, when dropping to certain voltage, characteristic by semiconductor devices has determined that semiconductor control circuit can enter runaway condition, when periphery circuit design is not done to consider or considered when insufficient, the meeting out of control of control circuit causes losing efficacy under the disabler of power electronic switch oneself control outage or some condition under the low suppling voltage condition.
Summary of the invention
Technical matters to be solved by this invention is to overcome the deficiencies in the prior art, the fully power electronic switch circuit of outage of a kind of oneself's control is provided, make power electronic switch when the oneself controls, realize reliable outage, guarantee function normally operation under the low suppling voltage condition that the power electronic switch oneself disconnects.
For solving above technical matters, the present invention takes following technical scheme:
A kind of oneself's control is the power electronic switch circuit of outage fully, and it comprises:
One power electronic switch;
One outside source when the signal of feature is stipulated in output, is controlled being switched on or switched off of described power electronic switch;
One interface circuit mates described outside source, controls being switched on or switched off of described power electronic switch, and its input end is connected with the output of described outside source by a switch;
One programme control circut, after described power electronic switch is connected, according to the predetermined condition output signal, controlling described power electronic switch keeps being switched on or switched off, be connected with the output of described outside source by a switch after the input end parallel connection of its input end and described interface circuit, an end of its power supply and described power electronic switch is electrically connected;
One match circuit when described programme control circut output signal, uses resistance capacitance to carry out Signal Matching and energy storage, and the output terminal of its input end and described interface circuit and described programme control circut is electrically connected;
One drive circuit, the output terminal of its input end and described match circuit is electrically connected, and output terminal is connected with the signal controlling end of described power electronic switch;
One external dc power is electrically connected with the other end of described power electronic switch.
Preferably, described match circuit is the device that is comprised of door circuit, storage capacitor and bleeder circuit at least, and its parameter requires to determine according to the power supply voltage range of the point out of control of anti-interference time, described programme control circut and the output of described driving circuit at least.
The two ends of the power supply of described programme control circut and described external dc power and described power electronic switch are electrically connected, and the power supply of described programme control circut and the connecting and disconnecting of described external dc power are controlled by described power electronic switch fully.
Be connected with the output of described outside source by a switch after the input end parallel connection of the input end of described programme control circut and described interface circuit, its output terminal is connected with the signal controlling end of described power electronic switch by described driving circuit, after the described power electronic switch conducting, do not access or during without useful signal, the break-make of described power electronic switch is fully by described programme control circut control at described outside source.
Preferably, described programme control circut output or two kinds of logic level signals of array output height, a kind of logic level signal (high level or low level) requires described power electronic switch to connect, and then another kind of logic level signal (low level or high level) requires described power electronic switch to disconnect.
Because the enforcement of above technical scheme, the present invention compared with prior art has following advantage:
1, externally under the control of signal, the break-make control of power electronic switch can be reliably realized, namely externally during the signal of signal source output regulation feature, connecting or disconnecting of power electronic switch can be controlled;
2, set up a match circuit in the circuit, during the programme control circut output signal, match circuit carries out energy storage and Signal Matching, make power electronic switch when the oneself controls, realize reliable outage by driving circuit, guarantee function normally operation under the low suppling voltage condition that the power electronic switch oneself disconnects.
Description of drawings
Fig. 1 is structural principle schematic diagram of the present invention;
Fig. 2 is the circuit diagram of the embodiment of the invention 1;
Fig. 3 is the circuit diagram of the embodiment of the invention 2;
Among the figure: 010, outside source; 020, switch; 030 external dc power; 100, interface circuit; 200, programme control circut; 300, match circuit; 400, driving circuit; 500, power electronic switch.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1, the present invention oneself control is the power electronic switch circuit of outage fully, and it comprises:
One power electronic switch 500;
One outside source 010 when the signal of feature is stipulated in output, is controlled being switched on or switched off of described power electronic switch 500;
One interface circuit 100 mates described outside source 010, controls being switched on or switched off of described power electronic switch 500, and its input end is connected by the output of a switch with described outside source 010;
One programme control circut 200, after described power electronic switch 500 is connected, according to the predetermined condition output signal, controlling described power electronic switch 500 keeps being switched on or switched off, be connected with the output of described outside source 010 by a switch 020 after the input end parallel connection of its input end and described interface circuit 100, an end of its power supply and described power electronic switch 500 is electrically connected;
One match circuit 300 when described programme control circut 200 output signal, uses resistance capacitance to carry out Signal Matching and energy storage, and the output terminal of its input end and described interface circuit 100 and described programme control circut 200 is electrically connected;
One drive circuit 400, the output terminal of its input end and described match circuit 300 is electrically connected, and output terminal is connected with the signal controlling end of described power electronic switch 500;
One external dc power 030 is electrically connected with the other end of described power electronic switch 500.
Described match circuit 300 is the device that is comprised of door circuit, storage capacitor and bleeder circuit at least, and its parameter requires to determine according to the power supply voltage range of the point out of control of anti-interference time, programme control circut and the output of driving circuit.
The power supply of described programme control circut 200 and described external dc power 030 are electrically connected with the two ends of described power electronic switch 500, and the connecting and disconnecting of the power supply of described programme control circut 200 and described external dc power 030 are subjected to described power electronic switch 500 controls fully.
Be connected with the output of described outside source 010 by a switch 020 after the input end parallel connection of the input end of described programme control circut 200 and described interface circuit 100, its output terminal is connected with the signal controlling end of described power electronic switch 500 by described driving circuit 400, after described power electronic switch 500 conductings, do not access or during without useful signal, the break-make of described power electronic switch 500 is fully by described programme control circut control at described outside source 010.
Programme control circut 200 outputs or two kinds of logic level signals of array output height, a kind of logic level signal (high level or low level) requires power electronic switch to connect, and then another kind of logic level signal (low level or high level) requires power electronic switch to disconnect.
Its course of work is:
After switch 020 is connected, during outside source output positive pulse signal, power electronic switch 500 is connected, programme control circut 200 normal power supplies, begin to carry out work by its preset program, programme control circut 200 outputs are connected when keeping signal, carry out energy storage and Signal Matching by match circuit 300, and excitation driving circuit 400 and power electronic switch 500 keep on-state; When programme control circut 200 is exported power-off signal by its pre-provisioning request, storage unit discharge in the match circuit 300, the pumping signal of driving circuit 400 and power electronic switch 500 weakens gradually, power electronic switch 500 disconnects gradually, the magnitude of voltage of internal electric source Vcc descends thereupon, when the magnitude of voltage of Vcc is down to the following certain voltage of programme control circut 200 normal operation supply voltages, semiconductor devices in the programme control circut 200 or integrated circuit can enter runaway condition, to keep the signal characteristic of connection consistent with keeping power electronic switch 500 for the feature that causes programme control circut 200 output signals (B3 point), signal " upset " phenomenon namely appears, the output signal of " upset " when out of control, energy storage and voltage matches by match circuit 300, that programme control circut 200 initial makeup energy out of control can not in time be delivered in the excitation energy of driving circuit 400 and power electronic switch 500, in time excitation power supply electronic switch 500 turns to on-state, the process that power electronic switch can continue to disconnect, the supply voltage Vcc of programme control circut 200 is lower, because of the excitation energy of exporting out of control more weak, thereby the oneself's control that realizes power electronic switch 500 disconnects fully;
After power electronic switch 500 is connected, disconnect or switch 020 is connected but outside source 010 when export without useful signal at switch 020, the A point does not have useful signal, and the break-make of power electronic switch 500 is controlled by programme control circut 200 fully;
After switch 020 was connected, when outside source 010 output continued undersuing, power electronic switch 500 disconnected, and programme control circut 200 is not powered, and can't work.
Fig. 2 is the circuit diagram of the embodiment of the invention 1.Referring now to Fig. 2, further specify the fully circuit structure of the power electronic switch circuit of outage of oneself's control.
Resistance R 101, R111, stabilivolt VD111 and triode V111 consist of interface circuit 100; Resistance R 121, R122 and micro-control unit MCU210 consist of programme control circut 200; Resistance R 11, diode VD1, VD2, capacitor C 1 and resistance R 1, R2 consist of match circuit 300; Triode V1 consists of driving circuit 400; Resistance R 3, R4 and triode V2 consist of power electronic switch 500.
After switch 020 is connected:
During outside source 010 output positive pulse signal, signal charges to capacitor C 1 by resistance R 101, diode VD1, and provide electric current by 1 couple of triode V1 of resistance R, triode V1 conducting, triode V2 base stage obtains electric current, thereby causes triode V2 emitter E and collector F saturation conduction, and namely power electronic switch 500 is connected, micro-control unit MCU210 is powered, and begins to carry out work by its preset program.When keeping power supply, MCU210 exports high level, and signal, is kept triode V2 and connected capacitor C 1, resistance R 1, R2, triode V1 continued power by resistance R 11, diode VD2, namely keeps power electronic switch and connects; When disconnecting power supply, MCU210 output low level (0V), diode VD2 oppositely ends, triode V2 base current reduces gradually, its emitter and collector also have saturation conduction to change to cut-off state, controlled source Vcc voltage descends gradually, when this voltage drops to the following a certain voltage of MCU normal working voltage, the MCU output port is out of control, can not keep output signal voltage is 0V, and by the effect of external pull-up resistor R122, diode V2 becomes conducting state by cut-off, to subsequent conditioning circuit generation current supplementary function, by capacitor C 1 and resistance R 1, the Proper Match of R2, be base stage supplemental current deficiency by triode V1 so that triode V1 turns to conducting state, thereby continue triode V1, the procedures of turn-off of V2, last triode V2 ends fully, and namely power electronic switch 500 disconnects;
When outside source 010 output continues undersuing, signal is by stabilivolt VD111, resistance R 111, triode V111 emitter, base stage forms the loop, make triode V111 emitter and collector saturation conduction, triode V111 collector (B2 point) voltage is lower than 0V, diode VD2 cut-off, 1 pair of resistance R 1 of capacitor C, R2 and triode V1 discharge, make triode V1 emitter and collector by saturation conduction to amplification, cut-off state changes, triode V2 base current reduces gradually, its emitter and collector are also changed to cut-off state by saturation conduction, be that power electronic switch 500 is closed gradually, because B2 point signal voltage is clamped down on by external signal, triode V1, V2 all becomes fully cut-off, and power electronic switch 500 is closed fully;
When the output of outside source 010 no signal or signal amplitude are inadequate, interface circuit 100 is exported without useful signal, subsequent conditioning circuit is not exerted an influence, also do not affect the state of power electronic switch 500, the break-make of power electronic switch 500 is fully by programme control circut 200 controls.
When external dc power voltage is got 3V ~ 3.6V, anti-external signal break impulse time span is 3s ~ 6s or when above, the NPN pipe selects 2SC1623, PNP pipe to select 2SA812, and diode all selects 1N4148, voltage stabilizing diode is got 3.6V, R1=R2=330k Ω, R3=39k Ω, R4=390k Ω, R101=R11=200k Ω, R111=R121=10k Ω, R122=51k Ω, C1=6.8 μ F ~ 20 μ F.
Fig. 3 is the circuit diagram of the embodiment of the invention 2, Main change shows in interface circuit 100, programme control circut 200 and the match circuit 300, keeping power electronic switch 500 during programme control circut 200 output low level signal connects, control power electronic switch 500 disconnects during the output high level signal, driving circuit 400 and power electronic switch 500 circuit do not change, the present embodiment principle of work is similar to Example 1, does not repeat them here.
In sum, the present invention is externally during the signal of signal source output regulation feature, can control connecting or disconnecting of power electronic switch, in circuit, also set up a match circuit, during the programme control circut output signal, match circuit carries out energy storage and Signal Matching, makes power electronic switch realize reliable outage when the oneself controls by driving circuit, guarantees function normally operation under the low suppling voltage condition that the power electronic switch oneself disconnects.
Below by reference to the accompanying drawings embodiments of the present invention have been done detailed description, its purpose is to allow the personage who is familiar with this art can understand content of the present invention and according to this enforcement, but can not limit protection scope of the present invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention
Claims (6)
1. an oneself controls the fully power electronic switch circuit of outage, comprising:
One power electronic switch;
One outside source when the signal of feature is stipulated in output, is controlled being switched on or switched off of described power electronic switch;
One interface circuit mates described outside source, controls being switched on or switched off of described power electronic switch, and its input end is connected with the output of described outside source by a switch;
One programme control circut, after described power electronic switch is connected, according to the predetermined condition output signal, controlling described power electronic switch keeps being switched on or switched off, be connected with the output of described outside source by a switch after the input end parallel connection of its input end and described interface circuit, an end of its power supply and described power electronic switch is electrically connected;
One match circuit when described programme control circut output signal, uses resistance capacitance to carry out Signal Matching and energy storage, and the output terminal of its input end and described interface circuit and described programme control circut is electrically connected;
One drive circuit, the output terminal of its input end and described match circuit is electrically connected, and output terminal is connected with the signal controlling end of described power electronic switch;
One external dc power is electrically connected with the other end of described power electronic switch.
2. oneself according to claim 1 controls the fully power electronic switch circuit of outage, it is characterized in that: the device of described match circuit for being comprised of door circuit, storage capacitor and bleeder circuit at least.
3. the complete power electronic switch circuit of outage of oneself control according to claim 2 is characterized in that: the parameter of described device requires to determine according to the power supply voltage range of the point out of control of anti-interference time, described programme control circut and the output of described driving circuit at least.
4. oneself according to claim 1 controls the fully power electronic switch circuit of outage, it is characterized in that: the two ends of the power supply of described programme control circut and described external dc power and described power electronic switch are electrically connected, and the power supply of described programme control circut and the connecting and disconnecting of described external dc power are controlled by described power electronic switch fully.
5. oneself according to claim 1 controls the fully power electronic switch circuit of outage, it is characterized in that: be connected with the output of described outside source by a switch after the input end parallel connection of the input end of described programme control circut and described interface circuit, its output terminal is connected with the signal controlling end of described power electronic switch by described driving circuit, after the described power electronic switch conducting, do not access or during without useful signal, the break-make of described power electronic switch is fully by described programme control circut control at described outside source.
6. oneself according to claim 1 controls the fully power electronic switch circuit of outage, it is characterized in that: described programme control circut output or two kinds of logic level signals of array output height, a kind of logic level signal (high level or low level) requires described power electronic switch to connect, and then another kind of logic level signal (low level or high level) requires described power electronic switch to disconnect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210415531.8A CN102929163B (en) | 2012-10-26 | 2012-10-26 | Power supply electronic switch circuit capable of being automatically controlled and completely powering off |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210415531.8A CN102929163B (en) | 2012-10-26 | 2012-10-26 | Power supply electronic switch circuit capable of being automatically controlled and completely powering off |
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| Publication Number | Publication Date |
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| CN102929163A true CN102929163A (en) | 2013-02-13 |
| CN102929163B CN102929163B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210415531.8A Active CN102929163B (en) | 2012-10-26 | 2012-10-26 | Power supply electronic switch circuit capable of being automatically controlled and completely powering off |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5003246A (en) * | 1988-08-31 | 1991-03-26 | Sgs-Thomson Microelectronics S.A. | Monolithic bidirectional switch with power MOS transistors |
| EP1648088A2 (en) * | 1998-08-05 | 2006-04-19 | Kabushiki Kaisha Toshiba | Gate circuit |
| CN201821329U (en) * | 2010-09-27 | 2011-05-04 | 上海步朗电子科技有限公司 | Electronic switching circuit with function of single-key control over multichannel power supply |
| CN201937563U (en) * | 2010-12-31 | 2011-08-17 | 刘志宏 | Standby low-power consumption power supply switch suitable for single chip microcomputer controller |
| CN102611420A (en) * | 2011-01-19 | 2012-07-25 | 深圳嘉信高能源技术股份有限公司 | Novel electronic switching circuit of mobile power supply product internally provided with lithium battery |
-
2012
- 2012-10-26 CN CN201210415531.8A patent/CN102929163B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5003246A (en) * | 1988-08-31 | 1991-03-26 | Sgs-Thomson Microelectronics S.A. | Monolithic bidirectional switch with power MOS transistors |
| EP1648088A2 (en) * | 1998-08-05 | 2006-04-19 | Kabushiki Kaisha Toshiba | Gate circuit |
| CN201821329U (en) * | 2010-09-27 | 2011-05-04 | 上海步朗电子科技有限公司 | Electronic switching circuit with function of single-key control over multichannel power supply |
| CN201937563U (en) * | 2010-12-31 | 2011-08-17 | 刘志宏 | Standby low-power consumption power supply switch suitable for single chip microcomputer controller |
| CN102611420A (en) * | 2011-01-19 | 2012-07-25 | 深圳嘉信高能源技术股份有限公司 | Novel electronic switching circuit of mobile power supply product internally provided with lithium battery |
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| Publication number | Publication date |
|---|---|
| CN102929163B (en) | 2015-07-15 |
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Effective date of registration: 20180813 Address after: 233030 2016 Tang He road, Bengbu, Anhui Patentee after: Huadong Photoelectric Integrated Device Research Institute Address before: 215163 No. 89 Longshan Road, hi tech Zone, Suzhou, Jiangsu Patentee before: China North Industries Group Corporation No.214 Research Institute Suzhou R&D Center |