CN203086432U - Soft-starting switch circuit - Google Patents
Soft-starting switch circuit Download PDFInfo
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- CN203086432U CN203086432U CN 201320043165 CN201320043165U CN203086432U CN 203086432 U CN203086432 U CN 203086432U CN 201320043165 CN201320043165 CN 201320043165 CN 201320043165 U CN201320043165 U CN 201320043165U CN 203086432 U CN203086432 U CN 203086432U
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Abstract
The utility model provides a soft-starting switch circuit, comprising a mechanical micro-motion key switch, a voltage comparator, a clamping circuit, an embedded processor, a sampling control circuit and a PMOSFET transistor, wherein one end of the mechanical micro-motion key switch is grounded, the other end is connected with a non-inverting input end of the voltage comparator, the clamping circuit is connected with an inverting input end of the voltage comparator, a comparison output end of the voltage comparator is connected with an input port of the embedded processor, an output port of the embedded processor is connected with the sampling control circuit, one end of a sampling resistor is connected with the source of the PMOSFET transistor, the other end is connected with the gate of the PMOSFET transistor, one end of a first resistor is connected with the non-inverting input end of the voltage comparator, the other end is connected with the gate of the PMOSFET transistor, one end of a second resistor is connected with the gate of the PMOSFET transistor, and the other end is connected with the sampling control circuit. The switch circuit is simple and reliable, adopts the semiconductor materials, has no mechanical contact portion, produces no spark, has long service life, is not affected by the external temperature, and ensures the stability of product quality.
Description
Technical field
The utility model relates to and is the switching circuit of electric in the electronic device, is specifically related to a kind of soft start switch circuit.
Background technology
Most switch all is pure machinery in the present electronic product that uses, and the startup in this kind circuit and the size of load have relation, and starting current is just bigger when load is big.The startup of circuit is easy to generate spark like this, and reduce the useful life of switch, has reduced the stability of product quality.
The utility model content
The purpose of this utility model is to provide a kind of soft start switch circuit.
For achieving the above object, the utility model has adopted following technical scheme:
This switching circuit comprises mechanical fine motion key switch, voltage comparator, voltage sampling circuit, the PMOSFET pipe, clamp circuit, flush bonding processor and controlling of sampling circuit, one end ground connection of machinery fine motion key switch, the other end links to each other with the in-phase input end of voltage comparator, clamp circuit links to each other with the inverting input of voltage comparator, the comparison output of voltage comparator links to each other with the input port of flush bonding processor, the output port of flush bonding processor links to each other with the controlling of sampling circuit, voltage sampling circuit comprises sampling resistor, first resistance and second resistance, one end of sampling resistor links to each other with the source electrode of PMOSFET pipe, the other end links to each other with the grid of PMOSFET pipe, one end of first resistance links to each other with the in-phase input end of voltage comparator, the other end links to each other with the grid of PMOSFET pipe, one end of second resistance links to each other with the grid of PMOSFET pipe, and the other end links to each other with the controlling of sampling circuit.
Described controlling of sampling circuit comprises triode, the grounded emitter of triode, and the collector electrode of triode links to each other with second resistance.
Described controlling of sampling circuit also comprises the current limliting potential-divider network, the current limliting potential-divider network comprises the 3rd resistance and the 5th resistance, one end of the 3rd resistance links to each other with the output port of flush bonding processor, the other end links to each other with the base stage of triode, one end of the 5th resistance links to each other with the base stage of triode, and the other end links to each other with the emitter of triode.
Described controlling of sampling circuit also comprises control output signal smooth network, control output signal smooth network comprises the 4th resistance and first electric capacity, one end of the 4th resistance links to each other with the output port of flush bonding processor, the other end links to each other with an end of first electric capacity, and the other end of first electric capacity links to each other with the emitter of triode.
Described switching circuit also comprises the twitter circuit that disappears that links to each other with the in-phase input end of voltage comparator.
Switching circuit described in the utility model utilizes the characteristic of PMOSFET pipe, plays the effect of soft start switch, and this switching circuit is simple and reliable, adopt semi-conducting material, do not have mechanical contact part, no-spark produces, long service life is not subjected to externally temperature influence, has guaranteed the stability of product quality.
Advantage of the present utility model is:
1. improve the useful life of components and parts, better guaranteed the stability of product quality.
2. to the input voltage no requirement (NR), this circuit also can operate as normal when input voltage is higher.
3. the introducing dc offset voltage is optimized transistorized static characteristic.
4. simple, the realization easily of circuit.
5. cost is lower.
6. simple to operate, the break-make of power supply and load all is that a key is finished.
Description of drawings
Fig. 1 is the structural representation of switching circuit described in the utility model;
GND is power supply ground, and VCC is a working power, and 5 is the in-phase input end of voltage comparator, and 6 is the inverting input of voltage comparator, and 7 is the comparison output of voltage comparator.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Referring to Fig. 1, switching circuit described in the utility model comprises mechanical fine motion key switch, voltage comparator, voltage sampling circuit, the PMOSFET pipe, clamp circuit, flush bonding processor and controlling of sampling circuit, one end ground connection of machinery fine motion key switch, the other end links to each other with the in-phase input end of voltage comparator, clamp circuit links to each other with the inverting input of voltage comparator, the comparison output of voltage comparator links to each other with the input port of flush bonding processor, the output port of flush bonding processor links to each other with the controlling of sampling circuit, voltage sampling circuit comprises sampling resistor, first resistance and second resistance, one end of sampling resistor links to each other with the source electrode of PMOSFET pipe, the other end links to each other with the grid of PMOSFET pipe, one end of first resistance links to each other with the in-phase input end of voltage comparator, the other end links to each other with the grid of PMOSFET pipe, one end of second resistance links to each other with the grid of PMOSFET pipe, and the other end links to each other with the controlling of sampling circuit; Described controlling of sampling circuit comprises triode, the grounded emitter of triode, and the collector electrode of triode links to each other with second resistance; Described controlling of sampling circuit also comprises the current limliting potential-divider network, the current limliting potential-divider network comprises the 3rd resistance and the 5th resistance, one end of the 3rd resistance links to each other with the output port of flush bonding processor, the other end links to each other with the base stage of triode, one end of the 5th resistance links to each other with the base stage of triode, and the other end links to each other with the emitter of triode; Described controlling of sampling circuit also comprises control output signal smooth network, control output signal smooth network comprises the 4th resistance and first electric capacity, one end of the 4th resistance links to each other with the output port of flush bonding processor, the other end links to each other with an end of first electric capacity, and the other end of first electric capacity links to each other with the emitter of triode; Described switching circuit also comprises the twitter circuit that disappears that links to each other with the in-phase input end of voltage comparator.
Operation principle of the present utility model:
Switching circuit described in the utility model utilizes the characteristic of PMOSFET pipe, works as Ugs〉U
TThe time, be in cut-off state; Work as Ugs＜U
TThe time, be in conducting state, make conducting or disconnection between power supply and load by the break-make of controlling the PMOSFET pipe, play the effect of soft start switch.
Embodiment
This circuit is to be the mechanical fine motion key switch S1 of SW-PB by model, PMOSFET manages Q0, model is the triode Q2 of S9014, voltage comparator (model is LM393), sampling resistor R0(20K Europe), the first resistance R 20(1K Europe), the second resistance R 21(1K Europe), the 3rd resistance R 22(1K Europe), the 4th resistance R 24(1K Europe), the 5th resistance R 25(100K Europe), the 6th resistance R 23(10K Europe), the 7th resistance R 29(100K Europe), the 8th resistance R 19(1K Europe), the first capacitor C 21(0.1 microfarad), the second capacitor C 18(0.1 microfarad), model is the diode D10 of 1N4007, model is the soft start switch that the combination of devices such as flush bonding processor of STM32F103 form.
Sampling resistor R0, first resistance R 20 and second resistance R 21 are formed voltage sampling circuit, the 6th resistance R 23, the 7th resistance R 29 and diode D10 form clamp circuit, the 3rd resistance R 22, the 4th resistance R 24, the 5th resistance R 25, first capacitor C 21 and triode Q2 form the controlling of sampling circuit, and the 8th resistance R 19 and second capacitor C 18 are formed the twitter circuit that disappears.
Suppose that power supply is 6V, under the situation that the button of mechanical fine motion key switch is not pressed, the forward input voltage U+ of voltage comparator〉negative sense input voltage U-, Ugs 〉 U
T, the PMOSFET pipe ends.When pressing mechanical fine motion key switch S1, sampling resistor R0 connects between power supply and ground with first resistance R 20, sampling resistor R0〉〉 first resistance R 20, this moment Ugs＜Ut, then PMOSFET pipe Q0 connects and is electric, while voltage comparator input grounding, U+＜U-(0.6V), the voltage comparator output low level is to the IO port (QD_TEST mouth) of flush bonding processor, after flush bonding processor detects the low level of input in the initialize routine section, from IO port (POW_CON mouth) output high level, triode Q2 conducting, sampling resistor R0〉〉 second resistance R 21, the grid of PMOSFET pipe Q0 is maintained low level, even at this moment mechanical fine motion key switch S1 has unclamped the conducting that also can not have influence on PMOSFET pipe Q0.When mechanical fine motion key switch S1 presses once more, the forward input voltage U+ of voltage comparator＜negative sense input voltage U-, output is low level once more, flush bonding processor detects after the low level of QD_TEST mouth from POW_CON mouth output low level, triode Q2 turn-offs, the grid voltage that machinery fine motion key switch S1 unclamps back PMOSFET pipe Q0 returns to original high level state again, and Q0 ends, and power supply and load disconnect.The conducting of PMOSFET pipe and by the individual time period is arranged in whole process, electric current is a smooth change in this time period, so played the effect of soft start.Circuit theory diagrams when power supply does not have powering load, are pressed mechanical fine motion key switch S1 as shown in Figure 1, power supply and load conducting, and power supply and load disconnect when pressing mechanical fine motion key switch S1 again.
The mechanical key that the 8th resistance R 19 and second capacitor C 18 the constitute twitter circuit network that disappears, can make its forward position that when closure, produces and back along shake to elastic reaction owing to the mechanical key switch, it is level and smooth to carry out filtering, the repeatedly false triggering of avoiding single keys presses to cause.Controlling of sampling circuit major function is by divider resistance the voltage that the button input state is produced to be sampled, realization is controlled the voltage at PMOSFET pipe two ends, grid source, and then realize the break-make of PMOSFET pipe is controlled, the clamp circuit effect is to make the end of oppisite phase input voltage of comparator keep a lower fixed level.
Claims (5)
1. soft start switch circuit, it is characterized in that: this switching circuit comprises mechanical fine motion key switch, voltage comparator, voltage sampling circuit, the PMOSFET pipe, clamp circuit, flush bonding processor and controlling of sampling circuit, one end ground connection of machinery fine motion key switch, the other end links to each other with the in-phase input end of voltage comparator, clamp circuit links to each other with the inverting input of voltage comparator, the comparison output of voltage comparator links to each other with the input port of flush bonding processor, the output port of flush bonding processor links to each other with the controlling of sampling circuit, voltage sampling circuit comprises sampling resistor, first resistance and second resistance, one end of sampling resistor links to each other with the source electrode of PMOSFET pipe, the other end links to each other with the grid of PMOSFET pipe, one end of first resistance links to each other with the in-phase input end of voltage comparator, the other end links to each other with the grid of PMOSFET pipe, one end of second resistance links to each other with the grid of PMOSFET pipe, and the other end links to each other with the controlling of sampling circuit.
2. according to the described a kind of soft start switch circuit of claim 1, it is characterized in that: described controlling of sampling circuit comprises triode, the grounded emitter of triode, and the collector electrode of triode links to each other with second resistance.
3. according to the described a kind of soft start switch circuit of claim 2, it is characterized in that: described controlling of sampling circuit also comprises the current limliting potential-divider network, the current limliting potential-divider network comprises the 3rd resistance and the 5th resistance, one end of the 3rd resistance links to each other with the output port of flush bonding processor, the other end links to each other with the base stage of triode, one end of the 5th resistance links to each other with the base stage of triode, and the other end links to each other with the emitter of triode.
4. according to the described a kind of soft start switch circuit of claim 3, it is characterized in that: described controlling of sampling circuit also comprises control output signal smooth network, control output signal smooth network comprises the 4th resistance and first electric capacity, one end of the 4th resistance links to each other with the output port of flush bonding processor, the other end links to each other with an end of first electric capacity, and the other end of first electric capacity links to each other with the emitter of triode.
5. according to the described a kind of soft start switch circuit of claim 1, it is characterized in that: described switching circuit also comprises the twitter circuit that disappears that links to each other with the in-phase input end of voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320043165 CN203086432U (en) | 2013-01-25 | 2013-01-25 | Soft-starting switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320043165 CN203086432U (en) | 2013-01-25 | 2013-01-25 | Soft-starting switch circuit |
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| Publication Number | Publication Date |
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| CN203086432U true CN203086432U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320043165 Expired - Fee Related CN203086432U (en) | 2013-01-25 | 2013-01-25 | Soft-starting switch circuit |
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| CN (1) | CN203086432U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701163A (en) * | 2013-12-06 | 2014-04-02 | 深圳市大疆创新科技有限公司 | Battery, aircraft with battery and battery control method |
| US9592744B2 (en) | 2013-12-06 | 2017-03-14 | SZ DJI Technology Co., Ltd | Battery and unmanned aerial vehicle with the battery |
| CN106502151A (en) * | 2016-11-03 | 2017-03-15 | 武汉博激世纪科技有限公司 | A kind of band software lock control on/off circuit |
-
2013
- 2013-01-25 CN CN 201320043165 patent/CN203086432U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701163A (en) * | 2013-12-06 | 2014-04-02 | 深圳市大疆创新科技有限公司 | Battery, aircraft with battery and battery control method |
| CN106030959A (en) * | 2013-12-06 | 2016-10-12 | 深圳市大疆创新科技有限公司 | Battery and unmanned aerial vehicle with the battery |
| US9592744B2 (en) | 2013-12-06 | 2017-03-14 | SZ DJI Technology Co., Ltd | Battery and unmanned aerial vehicle with the battery |
| CN107742915A (en) * | 2013-12-06 | 2018-02-27 | 深圳市大疆创新科技有限公司 | Battery and the aircraft with the battery |
| US10525832B2 (en) | 2013-12-06 | 2020-01-07 | SZ DJI Technology Co., Ltd. | Battery and unmanned aerial vehicle with the battery |
| US10625613B2 (en) | 2013-12-06 | 2020-04-21 | SZ DJI Technology Co., Ltd. | Battery and unmanned aerial vehicle with the battery |
| US10906427B2 (en) | 2013-12-06 | 2021-02-02 | SZ DJI Technology Co., Ltd. | Battery and unmanned aerial vehicle with the battery |
| CN107742915B (en) * | 2013-12-06 | 2021-02-19 | 深圳市大疆创新科技有限公司 | Battery and aircraft with same |
| CN112968223A (en) * | 2013-12-06 | 2021-06-15 | 深圳市大疆创新科技有限公司 | Power pack and unmanned vehicles |
| US11607972B2 (en) | 2013-12-06 | 2023-03-21 | SZ DJI Technology Co., Ltd. | Battery and unmanned aerial vehicle with battery indicator and venting opening |
| CN112968223B (en) * | 2013-12-06 | 2024-03-08 | 深圳市大疆创新科技有限公司 | Power pack and unmanned aerial vehicle |
| CN106502151A (en) * | 2016-11-03 | 2017-03-15 | 武汉博激世纪科技有限公司 | A kind of band software lock control on/off circuit |
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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: 20130724 Termination date: 20160125 |
|
| EXPY | Termination of patent right or utility model |