CN203942445U - A kind of high safe and reliable ON-OFF control circuit - Google Patents
A kind of high safe and reliable ON-OFF control circuit Download PDFInfo
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- CN203942445U CN203942445U CN201420024013.8U CN201420024013U CN203942445U CN 203942445 U CN203942445 U CN 203942445U CN 201420024013 U CN201420024013 U CN 201420024013U CN 203942445 U CN203942445 U CN 203942445U
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Abstract
The utility model relates to a kind of high safe and reliable ON-OFF control circuit, comprises power supply, load, 555 integrated timers, P channel MOS tube, two diodes, voltage-stabiliser tube, first to fourth resistance, first to fourth electric capacity, switch; In the time that input voltage accesses, make the square-wave signal of 3 pin output amplitude 13V left and right of 555 integrated timers, signal is by the charge pump circuit being made up of the second resistance and the second electric capacity, in the time of switch conduction, trigger the grid of metal-oxide-semiconductor, make the grid of metal-oxide-semiconductor than more than the high 10V of source potential, this bias voltage makes metal-oxide-semiconductor conducting.The electric current of the switching signal conducting of this circuit is only several milliamperes, greatly reduces impulse current; It is low that circuit produces hear rate, reliable operation; Volume is little, circuit uses simply, reliability is high.
Description
Technical field
The utility model relates to DC power supply field, particularly a kind of ON-OFF control circuit and by the power supply with this circuit.
Background technology
ON-OFF control circuit is more and more wider in field of power supplies application at present, in order to allow the more convenient and safe use power supply of people, switch or switching signal port need to be set on power supply, people can remove to control by the mode of manual or Long-distance Control the output state of power supply, the mode generally addressing this problem is by directly connect at major loop a switch or relay, but the switch of connecting on major loop goes to control, have large current spike in switch moment, very dangerous, and because switch conduction moment can produce large electric current, on-off times is many, the reliability of switch also can slowly reduce, if adopt the mode of the second relay, can carry out by control relay input coil energising power-off the conducting of control relay, electric current on relay input coil is very little generally less than 1A, fail safe is resolved, but relay contact conducting often the same with switch, also can therefore affect its reliability, and in the time that the power ratio of power supply is larger, the load capacity of switch or relay is also had to certain requirement, the large switch of electric current or the volume of relay are very large, this will occupy the space of a large amount of power supplys inside, increase the volume of power supply.
Summary of the invention
The purpose of this utility model is to provide a kind of high safe and reliable ON-OFF control circuit, can not produce large current spike in switch moment, and reliability can not reduce because of increasing of on-off times, by soft switch mode improve safety and the reliability of power on-off control circuit.
For achieving the above object, a kind of scheme of the present utility model is: a kind of high safe and reliable ON-OFF control circuit, comprises power supply, load, 555 integrated timers, metal-oxide-semiconductor, the first diode, the second diode, voltage-stabiliser tube, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, switch;
The positive pole of described input source is connected to first resistance one end, the drain electrode of metal-oxide-semiconductor, the negative pole of input source is connected to the positive pole of the first voltage-stabiliser tube, the negative pole of the first electric capacity, one end of the 3rd electric capacity and the 4th electric capacity, 1 pin of 555 integrated timers, load negative pole, described load positive pole is connected to the source electrode of metal-oxide-semiconductor, the positive pole of the second diode, the grid of described metal-oxide-semiconductor is connected to one end of switch, and the other end of switch is connected to the negative pole of the first diode, and the other end of the first resistance is connected to the negative pole of the first voltage-stabiliser tube, the positive pole of the first electric capacity, 4 pin of 555 integrated timers and 8 pin, one end of the 4th resistance, 7 pin of 555 integrated timers are connected to one end of the 3rd resistance, and 2 pin of 555 integrated timers are connected to the other end of the 3rd resistance, 6 pin of 555 integrated timers, the other end of the 4th resistance, the other end of the 4th electric capacity, 5 pin of 555 integrated timers are connected to load negative pole by the 3rd electric capacity, and 3 pin of 555 integrated timers are successively by the second resistance, electric capacity is connected to the positive pole of the first diode and the negative pole of the second diode.
Concrete, the safe and reliable ON-OFF control circuit of height of this patent, 555 described integrated timers, are 555 integrated timers of intersil company production.The pin definitions of 555 integrated timers is: 1 is GND, and 2 is TRIG, and 3 is OUT, and 4 is RESET, and 5 is CONT, and 6 is THRES, and 7 is DISCH, and 8 is Vcc.
Further concrete, the model of 555 integrated timers is ICM7555IPAZ.
Further concrete, the metal-oxide-semiconductor described in this patent is P channel MOS tube.
Concrete, the safe and reliable ON-OFF control circuit of height of this patent, described switch is to realize the switch of on-off function or the output signal switch of control circuit.
The utility model is also applicable to need to be to the application scenario of developing Of Remote Control Power, changes the switch in this circuit into switching signal (switch+and switch-).Switching signal (switch+and switch-) by its conducting of developing Of Remote Control Power circuit control and disconnection.
By adopting technique scheme, the utlity model has following beneficial effect:
The switching signal of this circuit both end voltage in the time of not conducting is no more than 13V, and the electric current of switching signal conducting is only several milliamperes, and this will greatly reduce the impulse current of switch conduction moment, thereby improves reliability and the fail safe of ON-OFF control circuit.
When this circuit is normally worked at power supply, the energy of circuit loss is mainly the pressure drop of metal-oxide-semiconductor, the conducting resistance that metal-oxide-semiconductor pressure drop is metal-oxide-semiconductor
be multiplied by the input current of power supply, the MOSFET conducting resistance of general withstand voltage 200VDC is several milliohms, and circuit loss is very little, and efficiency can reach 99%.In view of above description, it is low that this circuit produces hear rate, reliable operation.
Device volume in this circuit is little, and reliability is high, and price economy is compared high power switch and the high power relay of high price, and cost performance is higher, reaches and optimizes the cost of power on-off control circuit and the effect of volume; Be specially adapted to the control requirement of programmable power supply, there is very wide application prospect.
Brief description of the drawings
Fig. 1 is the safe and reliable ON-OFF control circuit of height of the present utility model.
Fig. 2 is the pin definitions of 555 integrated timers described in this patent.
In figure, power supply is that Ui, load are that Uo, 555 integrated timers are that N1, metal-oxide-semiconductor are that V1, the first diode are that V2, the second diode are that V3, voltage-stabiliser tube are that V4, the first resistance are that R1, the second resistance are that R2, the 3rd resistance are that R3, the 4th resistance are that R4, the first electric capacity are that C1, the second electric capacity are that C2, the 3rd electric capacity are that C3, the 4th electric capacity are C4, and switch is S2.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
Due to Fig. 1, the utility model output delay circuit operation principle: when input voltage Ui access, input voltage Ui triggers 555 integrated timer N1, makes about the 3 pin output amplitude 13V of 555 integrated timer N1, the square-wave signal of frequency f (
, unit is international unit).This signal is by the charge pump circuit being made up of the second resistance R 2 and the second capacitor C 2, this signal controlling charge pump, in the time of switch conduction, this signal will trigger the grid of metal-oxide-semiconductor V1, make the grid of metal-oxide-semiconductor V1 than more than the high 10V of source potential, this bias voltage makes metal-oxide-semiconductor V1 conducting.
555 integrated timer N1(ICM7555IPAZ) supply power voltage is 4.5V-16V, gives the voltage stabilizing value of the voltage-stabiliser tube V4 of 555 integrated timer N1 power supplies need be in this interval, more than the electric current of first resistance R 1 of flowing through need be greater than 2mA.Metal-oxide-semiconductor V1 need carry out type selecting according to the size of input current and voltage.
Claims (6)
1. a high safe and reliable ON-OFF control circuit, is characterized in that: comprise power supply (Ui), load (Uo), 555 integrated timers (N1), metal-oxide-semiconductor (V1), the first diode (V2), the second diode (V3), voltage-stabiliser tube (V4), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), switch (S2);
The positive pole of described input source (Ui) is connected to the first resistance (R1) one end, the drain electrode of metal-oxide-semiconductor (V1), the negative pole of input source (Ui) is connected to the positive pole of the first voltage-stabiliser tube (V4), the negative pole of the first electric capacity (C1), one end of the 3rd electric capacity (C3) and the 4th electric capacity (C4), 1 pin of 555 integrated timers (N1), load (Uo) negative pole, described load (Uo) positive pole is connected to the source electrode of metal-oxide-semiconductor (V1), the positive pole of the second diode (V3), the grid of described metal-oxide-semiconductor (V1) is connected to one end of switch (S2), the other end of switch (S2) is connected to the negative pole of the first diode (V2), the other end of the first resistance (R1) is connected to the negative pole of the first voltage-stabiliser tube (V4), the positive pole of the first electric capacity (C1), 4 pin of 555 integrated timers (N1) and 8 pin, one end of the 4th resistance (R4), 7 pin of 555 integrated timers (N1) are connected to one end of the 3rd resistance (R3), 2 pin of 555 integrated timers (N1) are connected to the other end of the 3rd resistance (R3), 6 pin of 555 integrated timers (N1), the other end of the 4th resistance (R4), the other end of the 4th electric capacity (C4), 5 pin of 555 integrated timers (N1) are connected to load (Uo) negative pole by the 3rd electric capacity (C3), 3 pin of 555 integrated timers (N1) are successively by the second resistance (R2), electric capacity (C2) is connected to the positive pole of the first diode (V2) and the negative pole of the second diode (V3).
2. high safe and reliable ON-OFF control circuit according to claim 1, is characterized in that: described 555 integrated timers (N1) are 555 integrated timers that intersil company produces.
3. high safe and reliable ON-OFF control circuit according to claim 1, is characterized in that: the pin definitions of described 555 integrated timers (N1) is: 1 is GND, and 2 is TRIG, and 3 is OUT, and 4 is RESET, and 5 is CONT, and 6 is THRES, and 7 is DISCH, and 8 is Vcc.
4. high safe and reliable ON-OFF control circuit according to claim 2, is characterized in that: the model of described 555 integrated timers (N1) is ICM7555IPAZ.
5. high safe and reliable ON-OFF control circuit according to claim 1, is characterized in that: described metal-oxide-semiconductor (V1) is P channel MOS tube.
6. high safe and reliable ON-OFF control circuit according to claim 1, is characterized in that: described switch (S2) is for can realize the switch of on-off function or the output signal switch of control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420024013.8U CN203942445U (en) | 2014-01-15 | 2014-01-15 | A kind of high safe and reliable ON-OFF control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420024013.8U CN203942445U (en) | 2014-01-15 | 2014-01-15 | A kind of high safe and reliable ON-OFF control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203942445U true CN203942445U (en) | 2014-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420024013.8U Expired - Fee Related CN203942445U (en) | 2014-01-15 | 2014-01-15 | A kind of high safe and reliable ON-OFF control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203942445U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425620A (en) * | 2015-11-04 | 2016-03-23 | 中国北方发动机研究所(天津) | Intelligent power switch capable of adjusting power-off time |
-
2014
- 2014-01-15 CN CN201420024013.8U patent/CN203942445U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425620A (en) * | 2015-11-04 | 2016-03-23 | 中国北方发动机研究所(天津) | Intelligent power switch capable of adjusting power-off time |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20190115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |