CN206149132U - Switching power supply shutdown rapid discharging circuit based on resistance -capacitance reduction voltage circuit - Google Patents
Switching power supply shutdown rapid discharging circuit based on resistance -capacitance reduction voltage circuit Download PDFInfo
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- CN206149132U CN206149132U CN201621186326.9U CN201621186326U CN206149132U CN 206149132 U CN206149132 U CN 206149132U CN 201621186326 U CN201621186326 U CN 201621186326U CN 206149132 U CN206149132 U CN 206149132U
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- resistance
- switching power
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- electric capacity
- power supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to an electronic circuit technique field, concretely relates to switching power supply shutdown rapid discharging circuit based on resistance -capacitance reduction voltage circuit, the utility model discloses a: triode and optical coupler, the projecting pole of triode meets with switching power supply circuit's earthing terminal, and its collecting electrode meets through the voltage output end of the 7th, the 8th parallelly connected each other resistance with switching power supply circuit, be equipped with third electric capacity between switching power supply circuit's voltage output end and the earthing terminal, include among the optical coupler: emitting diode and phototriode, phototriode's collecting electrode is connected with the base of triode, and its projecting pole meets with switching power supply circuit's earthing terminal, emitting diode's anodal live wire with the commercial power meets, and its negative pole is connected with the zero line of commercial power. The utility model discloses a discharge circuit greatly reduced the stand -by power consumption of electronic product to and shortened its unused time, do benefit to and promote on market.
Description
Technical field
The utility model is related to electronic circuit technology field, and in particular to a kind of Switching Power Supply based on capacitance-resistance voltage reduction circuit
Shutdown quick discharging circuit.
Background technology
With the development of society, use of the people to consumer electronics product is also more and more, in consumer electronics product
In the general Switching Power Supply for requiring the product in shutdown can quickly discharge.And the way of prior art is typically by electricity
Source output terminal some resistance of parallel connection form parallel RC network to realize what is discharged with the output filter capacitor of Switching Power Supply, but this kind of
Circuit structure has the velocity of discharge slow, the high shortcoming of stand-by power consumption, and it is unfavorable for commercially being promoted.
The content of the invention
To overcome drawbacks described above, the purpose of this utility model is to provide a kind of switch electricity based on capacitance-resistance voltage reduction circuit
Shut down quick discharging circuit in source.
The purpose of this utility model is achieved through the following technical solutions：
The utility model is a kind of Switching Power Supply shutdown quick discharging circuit based on capacitance-resistance voltage reduction circuit, and it is arranged at out
The front end of powered-down source circuit, and it connects with civil power, it includes：
First triode and photo-coupler, the emitter stage of first triode and the earth terminal of the switching power circuit
Connect, its colelctor electrode is connected by the seven, the 8th resistance parallel with one another with the voltage output end of the switching power circuit, and
Its base stage connects with one end of the 6th resistance, and the other end of the 6th resistance accesses the voltage output of the switching power circuit
End；The 3rd electric capacity is provided between the voltage output end and earth terminal of the switching power circuit；
The photo-coupler includes：Light emitting diode and phototriode, the colelctor electrode of the phototriode and
The base stage of one triode is connected, and its emitter stage connects with the earth terminal of the switching power circuit；The light emitting diode
Positive pole is connected by the 5th resistance with the live wire of civil power, and its negative pole is connected with the zero line of civil power；
The first electric capacity and the second diode, the two or two pole have been sequentially connected in series on the live wire of civil power by sense of current
The negative pole of pipe is connected with the 5th resistance, and the first diode and the second electric capacity are connected between the live wire and zero line of civil power, described
The negative pole of the first diode is connected between the positive pole of the first electric capacity and the second diode, second electric capacity and the described 1st
Pole pipe is in parallel.
Further, capacitor discharging circuit is parallel with first electric capacity, the capacitor discharging circuit is by four resistance
The bridge circuit of composition.
Further, first electric capacity is nonpolarity thin-film capacitor, and described second, third electric capacity is electrochemical capacitor.
Discharge circuit of the present utility model greatly reduces the stand-by power consumption of electronic product, and when shortening its shutdown
Between, beneficial to commercially being promoted.
Description of the drawings
For ease of explanation, the utility model is described in detail by following preferred embodiments and accompanying drawing.
Fig. 1 is circuit theory schematic diagram of the present utility model.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, further describes to the utility model.It should be appreciated that specific embodiment described herein is only to explain this reality
With new, it is not used to limit the utility model.
Fig. 1 is referred to, the utility model is a kind of Switching Power Supply shutdown quick discharging circuit based on capacitance-resistance voltage reduction circuit,
It is arranged on display, including：
It is arranged at the front end of switching power circuit, and it connects with civil power AC, and it includes：
Emitter stage and the switching power circuit of the first triode Q1 and photo-coupler N1, the first triode Q1
Earth terminal connects, and its colelctor electrode is defeated with the voltage of the switching power circuit by the seven, the 8th resistance R7, R8 parallel with one another
Go out and hold Vout to connect, the seven, the 8th resistance R7, R8 are used to be discharged for the 3rd electric capacity C3, and its base stage and the 6th resistance R6
One end connect, the other end of the 6th resistance R6 accesses the voltage output end Vout of the switching power circuit, and the 6th is electric
Resistance R6 is the biasing resistor of the first triode Q1；The first triode Q1 herein plays on-off action；The switching power circuit
Voltage output end Vout and earth terminal between be provided with the 3rd electric capacity C3；3rd electric capacity C3 is filtered for the output of switching power circuit
Ripple electric capacity；
The photo-coupler N1 includes：Light emitting diode and phototriode, the colelctor electrode of the phototriode with
The base stage of the first triode Q1 is connected, and its emitter stage connects with the earth terminal of the switching power circuit；The light-emitting diodes
The positive pole of pipe is connected by the 5th resistance R5 with the live wire of civil power AC, and the 5th resistance R5 is the light emitting diode of photo-coupler N1
Biasing resistor；Its negative pole is connected with the zero line of civil power AC；Wherein, photo-coupler N1 act as primary and secondary electrical isolation and letter
Number transmission；
The first electric capacity C1 and the second diode D2 have been sequentially connected in series on the live wire of civil power AC by sense of current, described
The negative pole of two diode D2 is connected with the 5th resistance R5, be connected between the live wire and zero line of civil power AC the first diode D1 and
The negative pole of the second electric capacity C2, the first diode D1 is connected between the positive pole of the first electric capacity C1 and the second diode D2, institute
State the second electric capacity C2 and the first diode D1 to be in parallel.Wherein, the first electric capacity C1 is depressured for AC electricity, and the second electric capacity
C2 strobes, first, second diode D1, D2 its play rectified action.
Further, capacitor discharging circuit is parallel with the first electric capacity C1, the capacitor discharging circuit is first resistor
R1, second resistance R2,3rd resistor R3, the bridge circuit of the 4th resistance R4 compositions.
Further, the first electric capacity C1 is nonpolarity thin-film capacitor, and described second, third C2, C3 electric capacity is electrolysis
Electric capacity.
The course of work of the present utility model is：
In the positive half cycle of civil power AC, electric current is along the first electric capacity C1, the second diode D2, the 5th resistance R5, photo-coupler
The light emitting diode circulation of N1, now, the phototriode of photo-coupler N1 is in the state of saturation conduction, the first triode Q1
End because of base stage low level, its collector voltage is high level, now the output filter capacitor C3 of Switching Power Supply and electric discharge electricity
Open circuit is formed between resistance, this filter capacitor electric discharge will not be given；
In civil power AC electricity negative half periods, electric current is along the first diode D1, the first electric capacity C1 circulations, due to the second electric capacity C2's
Exist, the light emitting diode and phototriode of photo-coupler N1 are in the state for turning on, the first triode Q1 is low because of base stage
Level and end, its collector voltage is high level, now shape between the output filter capacitor C3 and discharge resistance of Switching Power Supply
Into open circuit, this filter capacitor electric discharge will not be given；
In civil power AC power down, the light emitting diode of photo-coupler N1 and phototriode end, the first triode Q1 bases
Pole tension is raised, and in saturation conduction state, the first triode Q1 collector voltages are low level, the 7th resistance R7, and the 8th is electric
Resistance R8 accesses the both ends of filter capacitor of Switching Power Supply, due to the 7th resistance R7, the 8th resistance R8 resistance very littles, and itself and Switching Power Supply
Filter capacitor C3 compositions time constant very little, the electric charge of capacitor memory storage will soon discharge, and meet repid discharge
Require；
In switched power output, with the first triode Q1 as switch, the 7th resistance R7 of two little resistances of connecting, the 8th
Resistance R8, constitutes the less discharge loop of time constant, in shutdown moment by detecting civil power AC power-off signals, drives the
One triode Q1 so as to be rapidly reached saturation state, equivalent to power down moment, by the 7th resistance R7 of little resistance, the 8th resistance
R8 is connected on output filter capacitor C3 makes its rapid electric discharge, so as to reach the purpose of shutdown repid discharge.And Switching Power Supply is normal
During operation, civil power AC electricity drives photo-coupler N1 through capacitance-resistance voltage reduction circuit, makes the first triode Q1 in completely switched off state,
Now the output filter capacitor C3 and resistance R7 of discharge resistance the 7th, forms open circuit between the 8th resistance R8, reduces power consumption
Purpose.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (3)
1. a kind of Switching Power Supply based on capacitance-resistance voltage reduction circuit is shut down quick discharging circuit, it is characterised in that it is arranged at switch
The front end of power circuit, and it connects with civil power, it includes：
First triode and photo-coupler, the emitter stage of first triode and the earth terminal phase of the switching power circuit
Connect, its colelctor electrode is connected by the seven, the 8th resistance parallel with one another with the voltage output end of the switching power circuit, and its
Base stage connects with one end of the 6th resistance, and the other end of the 6th resistance accesses the voltage output of the switching power circuit
End；The 3rd electric capacity is provided between the voltage output end and earth terminal of the switching power circuit；
The photo-coupler includes：Light emitting diode and phototriode, the colelctor electrode of the phototriode and the one or three
The base stage of pole pipe is connected, and its emitter stage connects with the earth terminal of the switching power circuit；The positive pole of the light emitting diode
Connected with the live wire of civil power by the 5th resistance, its negative pole is connected with the zero line of civil power；
The first electric capacity and the second diode have been sequentially connected in series by sense of current on the live wire of civil power, second diode
Negative pole is connected with the 5th resistance, is connected to the first diode and the second electric capacity between the live wire and zero line of civil power, and described first
The negative pole of diode is connected between the positive pole of the first electric capacity and the second diode, second electric capacity and first diode
It is in parallel.
2. the Switching Power Supply based on capacitance-resistance voltage reduction circuit according to claim 1 is shut down quick discharging circuit, and its feature exists
In, capacitor discharging circuit is parallel with first electric capacity, the capacitor discharging circuit is the bridge-type electricity being made up of four resistance
Road.
3. the Switching Power Supply based on capacitance-resistance voltage reduction circuit according to claim 2 is shut down quick discharging circuit, and its feature exists
In first electric capacity is nonpolarity thin-film capacitor, and described second, third electric capacity is electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621186326.9U CN206149132U (en) | 2016-11-04 | 2016-11-04 | Switching power supply shutdown rapid discharging circuit based on resistance -capacitance reduction voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621186326.9U CN206149132U (en) | 2016-11-04 | 2016-11-04 | Switching power supply shutdown rapid discharging circuit based on resistance -capacitance reduction voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206149132U true CN206149132U (en) | 2017-05-03 |
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ID=58624718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621186326.9U Active CN206149132U (en) | 2016-11-04 | 2016-11-04 | Switching power supply shutdown rapid discharging circuit based on resistance -capacitance reduction voltage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206149132U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979270A (en) * | 2017-11-24 | 2018-05-01 | 卫星电子（中山）有限公司 | A kind of power supply unit with power-off protection function |
| CN109327934A (en) * | 2018-10-22 | 2019-02-12 | 横店集团得邦照明股份有限公司 | A kind of capacitor quick discharging circuit and its implementation |
-
2016
- 2016-11-04 CN CN201621186326.9U patent/CN206149132U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979270A (en) * | 2017-11-24 | 2018-05-01 | 卫星电子（中山）有限公司 | A kind of power supply unit with power-off protection function |
| CN109327934A (en) * | 2018-10-22 | 2019-02-12 | 横店集团得邦照明股份有限公司 | A kind of capacitor quick discharging circuit and its implementation |
| CN109327934B (en) * | 2018-10-22 | 2024-01-23 | 横店集团得邦照明股份有限公司 | Capacitor rapid discharging circuit and implementation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210302 Address after: 503 (5C), building D3, TCL Science Park, 1001 Zhongshan Garden Road, Shuguang community, Xili street, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Jiangyuan Technology (Group) Co.,Ltd. Address before: 518000 5C-5D, D3, TCL Science Park, 1001 Zhongshan Garden Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN SIVITON TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |