CN101963792B - Time sequence control circuit and control method thereof - Google Patents
Time sequence control circuit and control method thereof Download PDFInfo
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- CN101963792B CN101963792B CN2010105239788A CN201010523978A CN101963792B CN 101963792 B CN101963792 B CN 101963792B CN 2010105239788 A CN2010105239788 A CN 2010105239788A CN 201010523978 A CN201010523978 A CN 201010523978A CN 101963792 B CN101963792 B CN 101963792B
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Abstract
The invention discloses a time sequence control circuit, which comprises a power supply, a trigger signal switch, a first electronic switching circuit, a second electronic switching circuit, a first control circuit, a second control circuit, a Resistor Capacitor (RC) power-on delay circuit and a power-off relay circuit, wherein the first electronic switching circuit is connected in series between the power supply and a first voltage output end; the second electronic switching circuit is connected in series between the power supply and a second voltage output end; the first control circuit is connected between the trigger signal switch and the first electronic switching circuit; the second control circuit is connected between the trigger signal switch and the second electronic switching circuit; the Resistor Capacitor (RC) power-on delay circuit is connected between the first voltage output end and an input end of the second control circuit; and the power-off relay circuit is connected between the second voltage output end and an input end of the first control circuit. The time sequence control circuit can simultaneously control power-on time sequences and power-off time sequences of different power supplies of an internal chip of equipment, increase the reliability of the running of the equipment and the chip, and extend the service life of the equipment and the chip; besides, the time sequence control circuit has the advantages of simple structure, low manufacturing cost, simple process and suitability for large-scale popularization.
Description
Technical field
The present invention relates to the field of intelligent control technology of power supply, especially relate to a kind of sequential control circuit and control method thereof.
Background technology
Along with the development that electronic technology is maked rapid progress, DSP (digital signal processor), CPU (central processing unit), large scale integrated circuit etc. are used in fields such as communication, control automatically, space flight and aviation, medical treatment, household electrical appliance widely.Along with the development of chip, electric power-feeding structure also presents diversified characteristics based on the consideration of aspects such as reliability, stability, cost; Under this development trend, the electronic chip that equipment adopted is also varied, and these chips also become increasingly complex to the demand of supply voltage; For the equipment that the multiple power supplies power supply is arranged; The different chips in the equipment or the disparate modules of same chip have strict requirement to the electrifying timing sequence of multiple power supplies, some in addition the outage sequential also had certain requirement, if power on or the sequential of cutting off the power supply improper; Not only can influence the reliability of chip and equipment, even possibly cause the permanent damage of chip.
Sequential control circuit commonly used at present mostly is to adopt a kind of special timing controller to realize, though this timing controller can be realized powering on and the time sequence control of cutting off the power supply, this chip manufacturing cost is high, complex procedures, unsuitable large-area popularization.
Summary of the invention
To the problems referred to above, the invention provides a kind of circuit structure is simple, cost is low sequential control circuit and control method thereof.
The technical scheme that the present invention is adopted for its technical matters of solution is:
A kind of sequential control circuit; Comprise power supply, trigger pip switch; Be connected on first electronic switching circuit between the power supply and first voltage output end, be connected on second electronic switching circuit between the power supply and second voltage output end, be connected the first control circuit between the trigger pip switch and first electronic switching circuit; Be connected the second control circuit between the trigger pip switch and second electronic switching circuit, RC power on delay circuit and the outage delay circuit; Wherein, the said RC delay circuit that powers on is connected between the input end of first voltage output end and second control circuit, and said outage delay circuit is connected between the input end of second voltage output end and first control circuit.
A kind of control method of sequential control circuit comprises power on control procedure and outage control procedure, and wherein, said first voltage output end is for formerly powering at back outage output terminal, said second voltage output end be after the output terminal that formerly cuts off the power supply that powers on;
Its control procedure that powers on is:
At first let trigger pip switch connection high level signal, this moment, first control circuit was connected, and then controlled the first electronic switching circuit conducting, therefore first voltage output end and power connection; Then power supply through first voltage output end to the RC delay circuit charging that powers on; Second control circuit was connected after charging was accomplished; And then control the second electronic switching circuit conducting; This moment, second voltage output end was just connected, thereby realized that first voltage output end powers on earlier, the sequential control that powers on behind second voltage output end;
Its outage control procedure is:
At first let trigger pip switch connection low level signal, this moment, second control circuit turn-offed, and then controlled second electronic switching circuit and turn-off, therefore second voltage output end and power supply disconnection; And the outage delay circuit reaches second electronic switching circuit shutoff that time conducting before after trigger pip switch connection low level signal; To first control circuit electric signal is provided; Guarantee its connection, and then control the first electronic switching circuit conducting that therefore first voltage output end is also connected; Turn-offing up to second electronic switching circuit is after second voltage output end and power supply break off; Said outage delay circuit ends; The first control circuit and first electronic switching circuit then break off; Last first voltage output end and power supply break off, and finally realize the outage earlier of second voltage output end, the sequential control of cutting off the power supply behind first voltage output end.
As of the present invention and step improvement; The said RC delay circuit that powers on is the charging circuit that the electric capacity and first resistance are composed in series; The junction of the wherein said electric capacity and first resistance directly links to each other with the input end of second control circuit; The direct ground connection of the other end of said electric capacity, the other end of said first resistance is connected to first voltage output end.
As of the present invention and step improvement; Said outage delay circuit is composed in series by second resistance, first diode and a voltage stabilizing diode; The negative electrode of wherein said first diode is connected to the input end of first control circuit through second resistance; The anode of diode links to each other with the anode of voltage stabilizing diode, and the negative electrode of said voltage stabilizing diode is connected to second voltage output end.
Further, said first electronic switching circuit and second electronic switching circuit are the FET switch circuit of P raceway groove.
Wherein, The transistor circuit of first control circuit comprises the first transistor; It has base stage, collector and emitter; Its base stage is connected to the trigger pip switch through second diode, and its collector is connected to the control end of first electronic switching circuit, the direct ground connection of its emitter through first pull-up resistor.
Further, said first control circuit and second control circuit are transistor circuit.
Wherein, the transistor circuit of second control circuit directly is coupled to form by transistor seconds and the 3rd transistor, and it has base stage, collector and emitter respectively; The collector of said transistor seconds is connected to the trigger pip switch through second pull-up resistor; Its base stage links to each other with first voltage output end through the RC delay circuit that powers on; Its emitter is connected with the 3rd transistorized base stage; The said the 3rd transistorized collector is connected to the control end of second electronic switching circuit, the direct ground connection of its emitter through the 3rd pull-up resistor.
The invention has the beneficial effects as follows: the present invention is made up of power on delay circuit and outage delay circuit several ball bearing made using modules of power supply, trigger pip switch, first electronic switching circuit, second electronic switching circuit, first control circuit, second control circuit, RC; Can realize electrifying timing sequence and outage time sequence control simultaneously to device interior chip different electrical power; Increase the reliability of operation of equipment and chip and prolonged its serviceable life; In addition, this sequential control circuit is simple in structure, low cost of manufacture; Operation is simple, suitable large-area popularization.
Description of drawings
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further:
Fig. 1 is a theory structure block diagram of the present invention;
Fig. 2 is an embodiment of the invention circuit theory diagrams.
Embodiment
With reference to Fig. 1; A kind of sequential control circuit of the present invention; Comprise power supply 1, trigger pip switch 2; Be connected on first electronic switching circuit 3 between the power supply 1 and the first voltage output end V1, be connected on second electronic switching circuit 4 between the power supply 1 and the second voltage output end V2, be connected the first control circuit 5 between the trigger pip switch 2 and first electronic switching circuit 3; Be connected the second control circuit 6 between the trigger pip switch 2 and second electronic switching circuit 4, RC power on delay circuit 7 and the outage delay circuit 8; Wherein, the said RC delay circuit 7 that powers on is connected between the input end of the first voltage output end V1 and second control circuit 6, and said outage delay circuit 8 is connected between the input end of the second voltage output end V2 and first control circuit 5.
Further with reference to Fig. 2; Fig. 2 is the circuit theory diagrams of preferred embodiment of the present invention; In the present embodiment, first electronic switching circuit 3 and second electronic switching circuit 4 adopt the first FET Q1 on-off circuit and the second FET Q2 on-off circuit of P raceway groove respectively, and first, second this FET Q1, Q2 have grid, source electrode, drain electrode respectively; Wherein, The drain electrode output that the source electrode of said first, second FET Q1, Q2 is connected respectively to power supply 1, the first FET Q1 is connected to the first voltage output end V1, and the drain electrode output of the second FET Q2 is connected to the second voltage output end V2;
Wherein, The RC delay circuit 7 that powers on is the charging circuit that a capacitor C 1 and first resistance R 1 are composed in series; The junction of the wherein said capacitor C 1 and first resistance R 1 directly links to each other with the base stage of transistor seconds T2; The direct ground connection of the other end of said capacitor C 1, the other end of said first resistance R 1 are connected to the first voltage output end V1; In addition, power on the time-delay time parameter can set through the parameter value of the control capacittance C1 and first resistance R 1.
Wherein, Outage delay circuit 8 is composed in series by second resistance R 2, the first diode D1 and a voltage stabilizing diode DZ1; The negative electrode of the wherein said first diode D1 is connected to the base stage of the first transistor T1 through second resistance R 2; The anode of the first diode D1 links to each other with the anode of voltage stabilizing diode DZ1, and the negative electrode of said voltage stabilizing diode DZ1 is connected to the second voltage output end V2.
As preferred implementation of the present invention, between said first electronic switching circuit, 3 output terminals and the first voltage output end V1, be connected with a switching power source chip respectively between second electronic switching circuit, 4 output terminals and the second voltage output end V2; Can satisfy the different demands of different loads through this power supply chip to voltage.
For above-mentioned sequential control circuit is realized, the said first voltage output end V1 outage that formerly powers in the back, the said second voltage output end V2 for after the outage formerly that powers on, this circuit control method is following:
Its control procedure that powers on is:
At first let trigger pip switch 2 connect high level signal, first control circuit 5 connections this moment, and then control 3 conductings of first electronic switching circuit, therefore the first voltage output end V1 and power supply 1 are connected; Then power supply 1 through the first voltage output end V1 to RC delay circuit 7 chargings that power on; Second control circuit 6 was connected after charging was accomplished; And then control 4 conductings of second electronic switching circuit; This moment, the second voltage output end V2 just connected, thereby realized that the first voltage output end V1 powers on earlier, the sequential control that powers on behind the second voltage output end V2;
Its outage control procedure is:
At first let trigger pip switch 2 connect low level signal, second control circuit 6 shutoffs this moment, and then control second electronic switching circuit 4 and turn-off, therefore the second voltage output end V2 and power supply 1 break off; And outage delay circuit 8 reaches the 4 shutoff that time conductings before of second electronic switching circuit after trigger pip switch 2 is connected low level signal; Electric signal is provided for first control circuit 5; Guarantee its connection; And then control 3 conductings of first electronic switching circuit, therefore the first voltage output end V1 also connects; Turn-offing up to second electronic switching circuit 4 is after the second voltage output end V2 and power supply 1 break off; Said outage delay circuit 8 ends; The first control circuit 5 and first electronic switching circuit 3 then break off; Last first voltage output end V1 and power supply break off, and finally realize second voltage output end V2 outage earlier, the sequential control of cutting off the power supply behind the first voltage output end V1.
More than be that preferable enforcement of the present invention is specified; But the invention is not limited to said embodiment; Those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite of spirit of the present invention, distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (1)
1. the control method of a sequential control circuit; This sequential control circuit comprises power supply (1), trigger pip switch (2); Be connected on first electronic switching circuit (3) between power supply (1) and first voltage output end (V1); Be connected on second electronic switching circuit (4) between power supply (1) and second voltage output end (V2); Be connected the first control circuit (5) between trigger pip switch (2) and first electronic switching circuit (3), be connected the second control circuit (6) between trigger pip switch (2) and second electronic switching circuit (4), RC power on delay circuit (7) and the outage delay circuit (8); Wherein, The said RC delay circuit (7) that powers on is connected between the input end of first voltage output end (V1) and second control circuit (6); Said outage delay circuit (8) is connected between the input end of second voltage output end (V2) and first control circuit (5), and the control method of this sequential control circuit does, wherein; Said first voltage output end (V1) the outage output terminal that is formerly to power in the back, said second voltage output end (V2) for after the output terminal that formerly cuts off the power supply that powers on;
Its control procedure that powers on is:
At first let trigger pip switch (2) connect high level signal, first control circuit this moment (5) is connected, and then controls first electronic switching circuit (3) conducting, and therefore first voltage output end (V1) is connected with power supply (1); Then power supply (1) charges to the RC delay circuit (7) that powers on through first voltage output end (V1); Second control circuit (6) was connected after charging was accomplished; And then control second electronic switching circuit (4) conducting; Second voltage output end this moment (V2) is just connected, thereby realizes that first voltage output end (V1) powers on earlier, the sequential control that powers on behind second voltage output end (V2);
Its outage control procedure is:
At first let trigger pip switch (2) connect low level signal, second control circuit this moment (6) turn-offs, and then controls second electronic switching circuit (4) and turn-off, and therefore second voltage output end (V2) breaks off with power supply (1); And outage delay circuit (8) reaches second electronic switching circuit (4) shutoff that time conducting before after trigger pip switch (2) is connected low level signal; Electric signal is provided for first control circuit (5); Guarantee its connection; And then control first electronic switching circuit (3) conducting, therefore first voltage output end (V1) is also connected; Turn-offing up to second electronic switching circuit (4) is after second voltage output end (V2) breaks off with power supply (1); Said outage delay circuit (8) ends; First control circuit (5) and first electronic switching circuit (3) then break off; Last first voltage output end (V1) breaks off with power supply, finally realizes second voltage output end (V2) outage earlier, the sequential control of first voltage output end (V1) back outage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010105239788A CN101963792B (en) | 2010-10-29 | 2010-10-29 | Time sequence control circuit and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105239788A CN101963792B (en) | 2010-10-29 | 2010-10-29 | Time sequence control circuit and control method thereof |
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| CN101963792A CN101963792A (en) | 2011-02-02 |
| CN101963792B true CN101963792B (en) | 2012-08-22 |
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| CN103365222B (en) * | 2012-03-26 | 2017-04-12 | 中兴通讯股份有限公司 | Power sequence control circuit and integrated circuit |
| CN102749856B (en) * | 2012-05-30 | 2016-04-20 | 曙光信息产业(北京)有限公司 | A kind of power-on time sequence control circuit and method |
| CN103281067A (en) * | 2013-06-14 | 2013-09-04 | 成都锐奕信息技术有限公司 | False-operation resistant buffering port |
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| CN105320040B (en) * | 2015-11-20 | 2018-04-06 | 上海斐讯数据通信技术有限公司 | Power-on time sequence control circuit, control method, electric supply installation and electric terminal |
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