CN206323289U - The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump - Google Patents
The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump Download PDFInfo
- Publication number
- CN206323289U CN206323289U CN201621436589.0U CN201621436589U CN206323289U CN 206323289 U CN206323289 U CN 206323289U CN 201621436589 U CN201621436589 U CN 201621436589U CN 206323289 U CN206323289 U CN 206323289U
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- China
- Prior art keywords
- voltage
- circuit
- power supply
- switching power
- output voltage
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of circuit structure of Switching Power Supply quick closedown output voltage after AC dump, include alternating current input detecting circuit, voltage comparator circuit, optocoupler control circuit and quick leadage circuit, the voltage comparator circuit connects alternating current input detecting circuit, optocoupler control circuit connection voltage comparator circuit, the quick leadage circuit connection optocoupler control circuit.By coordinating circuit and quick leadage circuit are controlled using alternating current input detecting circuit, voltage comparator circuit, optocoupler, after equipment disconnects alternating voltage input, can quickly be released the output voltage of power supply, realize the purpose of quick closedown output voltage, the time that shutdown is waited is substantially reduced, beneficial to the Consumer's Experience effect of equipment.
Description
Technical field
The utility model is related to power control circuit art, refers in particular to Switching Power Supply after a kind of AC dump quick
Close the circuit structure of output voltage.
Background technology
The electronic equipments such as household electrical appliance, shut down or are shut down in stand-by operation in normal work, there is one longer
Stand-by period, the main cause that this stand-by period produces is that the capacitance used among the Switching Power Supply that equipment is used is larger
Electric capacity, the time that equipment shutdown is waited is exactly mainly the time required for electric capacity electric discharge is waited.Electricity only on these electric capacity
Switching Power Supply can close voltage output when pressure value is reduced to some particular value.The time that this shutdown is waited is longer past
Toward the Consumer's Experience effect for being unfavorable for equipment.
Utility model content
In view of this, in view of the existing deficiencies of the prior art, it is disconnected that its main purpose is to provide a kind of exchange to the utility model
The circuit structure of Switching Power Supply quick closedown output voltage after electricity, it can effectively solve the existing electronic equipment shutdown stand-by period
Long the problem of.
To achieve the above object, the utility model is using following technical scheme：
The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump, includes alternating current input detection
Circuit, voltage comparator circuit, optocoupler control circuit and quick leadage circuit, voltage comparator circuit connection alternating current input detection
Circuit, optocoupler control circuit connection voltage comparator circuit, the quick leadage circuit connection optocoupler control circuit.
As a kind of preferred scheme, the alternating current input detecting circuit include diode D1, resistance R1, resistance R2 and
Voltage-stabiliser tube ZD1, diode D1 and resistance R1 are connected in series between current rectifying and wave filtering circuit and voltage comparator circuit, resistance R2
And voltage-stabiliser tube ZD1 is connected in parallel between voltage comparator circuit and ground connection.
As a kind of preferred scheme, another road that the voltage comparator circuit is used is used for the voltage compared by transformer
Auxiliary power supply winding is produced, and is slowly charged via the slightly larger resistance R3 of the resistance electric capacity C3s larger to capacitance, by simultaneously
The voltage-stabiliser tube ZD2 of connection obtains a stable voltage.
As a kind of preferred scheme, the voltage-stabiliser tube ZD1 obtains stable voltage and is more than the stable electricity that voltage-stabiliser tube ZD2 is obtained
At least 0.7V of pressure value.
As a kind of preferred scheme, the voltage comparator circuit carries out voltage ratio compared with friendship using PNP triode Q1
The magnitude of voltage of the comparison voltage 1 that voltage-stabiliser tube ZD1 is produced after control source is flowed more than the comparison voltage 2 produced by voltage-stabiliser tube ZD2
Magnitude of voltage, PNP triode Q1 emitter and collector by.
As a kind of preferred scheme, after the voltage comparator circuit is disconnected using PNP triode Q1 alternating voltages,
The magnitude of voltage rapid decrease of comparison voltage 1, and the magnitude of voltage of comparison voltage 2 is slower than ratio due to the speed of electric capacity C3 effect landing
Compared with voltage 1, during magnitude of voltage declines when the magnitude of voltage for comparison voltage 1 occur is less than the magnitude of voltage of comparison voltage 2
Wait, PNP triode Q1 emitter and collector conducting, optocoupler control circuit works with quick leadage circuit.
As a kind of preferred scheme, the optocoupler control circuit is made up of a NPN triode Q2 and optocoupler OP1, works as PNP
After triode Q1 emitter and collector conducting, NPN triode Q2 collector and emitter is turned on therewith, and optocoupler OP1 is led
It is logical.
As a kind of preferred scheme, the quick leadage circuit is made up of PNP triode Q3 and bleeder resistance, optocoupler OP1
After conducting, PNP triode Q3 conductings, bleeder resistance ground connection, the output voltage for power supply of quickly releasing.
The utility model has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technology
Scheme is understood：
By coordinating circuit and quick vent discharge are controlled using alternating current input detecting circuit, voltage comparator circuit, optocoupler
Road, after equipment disconnects alternating voltage input, the output voltage for the power supply that can quickly release realizes the mesh of quick closedown output voltage
, the time that shutdown is waited is substantially reduced, beneficial to the Consumer's Experience effect of equipment.
More clearly to illustrate architectural feature of the present utility model and effect, come below in conjunction with the accompanying drawings with specific embodiment pair
The utility model is described in detail.
Brief description of the drawings
Fig. 1 is the structured flowchart of the preferred embodiment of the utility model；
Fig. 2 is the concrete structure schematic diagram of the preferred embodiment of the utility model.
Accompanying drawing identifier declaration：
10th, alternating current input detecting circuit 20, voltage comparator circuit
30th, optocoupler control circuit 40, quick leadage circuit
50th, current rectifying and wave filtering circuit.
Embodiment
It refer to shown in Fig. 1 and Fig. 2, that show the concrete structure of the preferred embodiment of the utility model, include
Alternating current input detecting circuit 10, voltage comparator circuit 20, optocoupler control circuit 30 and quick leadage circuit 40.
The voltage comparator circuit 20 connection alternating current input detecting circuit 10, optocoupler control circuit 30 connection voltage ratio compared with
Circuit 20, the quick connection of the leadage circuit 40 optocoupler control circuit 30.
The alternating current input detecting circuit 10 includes diode D1, resistance R1, resistance R2 and voltage-stabiliser tube ZD1, and this two
Pole pipe D1 and resistance R1 are connected in series between current rectifying and wave filtering circuit 50 and voltage comparator circuit 20, resistance R2 and voltage-stabiliser tube
ZD1 is connected in parallel between voltage comparator circuit 20 and ground connection.Another road that the voltage comparator circuit 20 is used is used to compare
Voltage produced by the auxiliary power supply winding of transformer, it is slow via electric capacity C3 larger to capacitance the slightly larger resistance R3 of a resistance
Slow charging, a stable voltage is obtained by voltage-stabiliser tube ZD2 in parallel.It is big that the voltage-stabiliser tube ZD1 obtains stable voltage
In at least 0.7V of the voltage-stabiliser tube ZD2 stable voltages obtained.
The voltage comparator circuit 20 carries out voltage ratio compared with steady after alternating voltage input using PNP triode Q1
The magnitude of voltage for the comparison voltage 1 that pressure pipe ZD1 is produced is more than the magnitude of voltage of the comparison voltage 2 produced by voltage-stabiliser tube ZD2, the poles of PNP tri-
Pipe Q1 emitter and collector is by the optocoupler control grade subsequent conditioning circuit of circuit 30 is failure to actuate, and other power attenuations are not produced.
After the voltage comparator circuit 20 is disconnected using PNP triode Q1 alternating voltages, under the magnitude of voltage of comparison voltage 1 is quick
Drop, and the magnitude of voltage of comparison voltage 2 is slower than comparison voltage 1 due to the speed of electric capacity C3 effect landing, declines in magnitude of voltage
During when the magnitude of voltage for comparison voltage 1 occur be less than comparison voltage 2 magnitude of voltage when, PNP triode Q1 emitter stage
With colelctor electrode conducting, optocoupler control circuit 30 works with quick leadage circuit 40.
The optocoupler control circuit 30 is made up of a NPN triode Q2 and optocoupler OP1, when PNP triode Q1 transmitting
Behind pole and colelctor electrode conducting, NPN triode Q2 collector and emitter is turned on therewith, optocoupler OP1 conductings.It is described quickly to release
Circuit 40 is made up of PNP triode Q3 and bleeder resistance R9, R10, R11, R12, and after optocoupler OP1 conductings, PNP triode Q3 is led
Logical, bleeder resistance R9, R10, R11, R12 ground connection, the output voltage for power supply of quickly releasing realize quick closedown output voltage.
Design focal point of the present utility model is：By coordinate using alternating current input detecting circuit, voltage comparator circuit,
Optocoupler controls circuit and quick leadage circuit, after equipment disconnects alternating voltage input, the output voltage for the power supply that can quickly release,
The purpose of quick closedown output voltage is realized, the time that shutdown is waited is substantially reduced, beneficial to the Consumer's Experience effect of equipment.
The above, is only preferred embodiment of the present utility model, and not technical scope of the present utility model is made
Any limitation, therefore every any trickle amendment made according to technical spirit of the present utility model to above example, equivalent change
Change with modification, in the range of still falling within technical solutions of the utility model.
Claims (8)
1. the circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump, it is characterised in that：Include exchange
Electric input detecting circuit, voltage comparator circuit, optocoupler control circuit and quick leadage circuit, voltage comparator circuit connection exchange
Electric input detecting circuit, optocoupler control circuit connection voltage comparator circuit, the quick leadage circuit connection optocoupler control circuit.
2. the circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump according to claim 1, its
It is characterised by：The alternating current input detecting circuit includes diode D1, resistance R1, resistance R2 and voltage-stabiliser tube ZD1, two pole
Pipe D1 and resistance R1 are connected in series between current rectifying and wave filtering circuit and voltage comparator circuit, and resistance R2 and voltage-stabiliser tube ZD1 are in parallel
It is connected between voltage comparator circuit and ground connection.
3. the circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump according to claim 2, its
It is characterised by：The voltage that another road that the voltage comparator circuit is used is used to compare is produced by the auxiliary power supply winding of transformer
It is raw, slowly charge, taken by voltage-stabiliser tube ZD2 in parallel via the slightly larger resistance R3 of the resistance electric capacity C3 larger to capacitance
Obtain a stable voltage.
4. the circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump according to claim 3, its
It is characterised by：The voltage-stabiliser tube ZD1 obtains at least 0.7V that stable voltage is more than the stable voltage that voltage-stabiliser tube ZD2 is obtained.
5. the circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump according to claim 3, its
It is characterised by：The voltage comparator circuit carries out voltage ratio compared with voltage stabilizing after alternating voltage input using PNP triode Q1
The magnitude of voltage for the comparison voltage 1 that pipe ZD1 is produced is more than the magnitude of voltage of the comparison voltage 2 produced by voltage-stabiliser tube ZD2, PNP triode
Q1 emitter and collector by.
6. the circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump according to claim 3, its
It is characterised by：After the voltage comparator circuit is disconnected using PNP triode Q1 alternating voltages, the voltage of comparison voltage 1
It is worth rapid decrease, and the magnitude of voltage of comparison voltage 2 is slower than comparison voltage 1 due to the speed of electric capacity C3 effect landing, in voltage
During value decline when the magnitude of voltage for comparison voltage 1 occur is less than the magnitude of voltage of comparison voltage 2, PNP triode Q1
Emitter and collector conducting, optocoupler control circuit and quick leadage circuit work.
7. the circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump according to claim 3, its
It is characterised by：The optocoupler control circuit is made up of a NPN triode Q2 and optocoupler OP1, when PNP triode Q1 emitter stage
After colelctor electrode conducting, NPN triode Q2 collector and emitter is turned on therewith, optocoupler OP1 conductings.
8. the circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump according to claim 7, its
It is characterised by：The quick leadage circuit is made up of PNP triode Q3 and bleeder resistance, after optocoupler OP1 conductings, PNP triode
Q3 is turned on, bleeder resistance ground connection, the output voltage for power supply of quickly releasing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621436589.0U CN206323289U (en) | 2016-12-26 | 2016-12-26 | The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621436589.0U CN206323289U (en) | 2016-12-26 | 2016-12-26 | The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206323289U true CN206323289U (en) | 2017-07-11 |
Family
ID=59260411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621436589.0U Withdrawn - After Issue CN206323289U (en) | 2016-12-26 | 2016-12-26 | The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206323289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787654A (en) * | 2016-12-26 | 2017-05-31 | 厦门著赫电子科技有限公司 | The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump |
-
2016
- 2016-12-26 CN CN201621436589.0U patent/CN206323289U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787654A (en) * | 2016-12-26 | 2017-05-31 | 厦门著赫电子科技有限公司 | The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump |
| CN106787654B (en) * | 2016-12-26 | 2023-06-20 | 厦门著赫电子科技有限公司 | Circuit structure for switching power supply to rapidly shut off output voltage after alternating current power failure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170711 Effective date of abandoning: 20230620 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170711 Effective date of abandoning: 20230620 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |