CN206628981U - Width funtion exports flyback power supply PWM IC power supply circuits - Google Patents
Width funtion exports flyback power supply PWM IC power supply circuits Download PDFInfo
- Publication number
- CN206628981U CN206628981U CN201720189738.6U CN201720189738U CN206628981U CN 206628981 U CN206628981 U CN 206628981U CN 201720189738 U CN201720189738 U CN 201720189738U CN 206628981 U CN206628981 U CN 206628981U
- Authority
- CN
- China
- Prior art keywords
- power supply
- resistance
- positive pole
- diode
- filter capacitor
- Prior art date
- 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.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of Width funtion to export flyback power supply PWM IC power supply circuits,Including transformer T and power supply U1,The 5th pin of the power supply U1 is connected to filter capacitor EC1 positive pole,Counnter attack fills diode D1 negative pole and damping resistance R1 one end,The other end of the damping resistance R1 is connected with commutation diode D2 negative pole,The positive pole of the commutation diode D2 is connected with transformer T assists winding NVCC the 3rd pin,The positive pole of the counnter attack filling diode D1 is connected with NPN type triode Q emitter stage,The colelctor electrode of the NPN type triode Q is connected to resistance R3 one end,Filter capacitor EC2 positive pole and resistance R2 one end,The base stage of the NPN type triode Q and the resistance R3 other end are respectively connected with voltage-regulator diode Z negative pole.The utility model is simple in construction, and cost is low, and reduces Width funtion output inverse-excitation type switch power-supply PWM IC current supply losses, and realizing reduces no-load power purpose.
Description
Technical field
It the utility model is related to inverse-excitation type switch power-supply PWM IC power supply circuit technical fields, more particularly to a kind of Width funtion
Export flyback power supply PWM IC power supply circuits.
Background technology
At present, known Width funtion output inverse-excitation type switch power-supply PWM IC power supply circuits are to help winding T1B by transformer is defeated,
Commutation diode D5, hinders mud resistance R12, filter capacitor EC5, linear voltage stabilization R5, Z1, Q1, and counnter attack fills diode D3 and filtering
Electric capacity EC4 is formed (see Fig. 3).Although it can realize but extremely harsh in current switch power supply efficiency and work(load power laws and regulations requirement
In the environment of, traditional linear voltage stabilization mode will increase no-load power, it necessarily restricted, therefore I is present using upper
Propose a kind of Width funtion output flyback power supply PWM IC power supply circuits and be used to solve the above problems.
Utility model content
The purpose of this utility model is and a kind of Width funtion output proposed in order to solve shortcoming present in prior art
Flyback power supply PWM IC power supply circuits.
To achieve these goals, the utility model employs following technical scheme：
Width funtion exports flyback power supply PWM IC power supply circuits, includes the of transformer T and power supply U1, the power supply U1
5 pins are connected to filter capacitor EC1 positive pole, counnter attack fills diode D1 negative pole and damping resistance R1 one end, described
The damping resistance R1 other end is connected with commutation diode D2 negative pole, and the positive pole of the commutation diode D2 is with transformer T's
Assists winding NVCC the 3rd pin connection, the positive pole of the counnter attack filling diode D1 are connected with NPN type triode Q emitter stage,
The colelctor electrode of the NPN type triode Q is connected to the one of resistance R3 one end, filter capacitor EC2 positive pole and resistance R2
End, the base stage of the NPN type triode Q and the resistance R3 other end are respectively connected with voltage-regulator diode Z negative pole, the resistance R2
The other end be connected with commutation diode D3 negative pole, the positive pole of the commutation diode D3 and transformer T assists winding
NVCC the 5th pin connection, the 8th pin of the transformer T are connected with two commutation diode D4 parallel with one another positive pole,
The 10th pin of the transformer T is connected with filter capacitor EC3 negative pole, the positive pole of the filter capacitor EC3 respectively with rectification
Diode D4 negative pole connects with power input voltage.
Preferably, the 2nd pin of the power supply U1, filter capacitor EC1 negative pole, filter capacitor EC2 negative pole, filtered electrical
Negative pole, transformer T the 10th pin and the voltage-regulator diode Z positive pole for holding EC3 are grounded.
Preferably, the assists winding NVCC of the transformer T is assists winding NVCC1 and assists winding NVCC2 two parts
Forming, wherein assists winding NVCC1 one end ground connection, assists winding NVCC2 one end is connected with commutation diode D3 positive pole,
Positive pole of assists winding NVCC1 and assists winding the NVCC2 other end with commutation diode D2 is connected.
Preferably, the filter capacitor EC1, filter capacitor EC2 and filter capacitor EC3 capacitance be respectively 10uF,
22uF and 470uF.
Preferably, the damping resistance R1, resistance R2 and resistance R3 resistance value are respectively 3.3 Ω, 4.7 Ω, 100k Ω.
Preferably, the magnitude of voltage of the voltage-regulator diode Z is 12V.
The beneficial effects of the utility model are：Pass through transformer T assists windings NVCC and commutation diode D3, resistance mud electricity
Hinder R2, filter capacitor EC2, resistance R3, voltage-regulator diode Z, NPN type triode Q, counnter attack filling diode D1 and filter capacitor EC1
Current supply circuit is formed, the convenient power supply when output voltage is upper limit 20V is by transformer T assists windings NVCC1 so that rectification two
Pole pipe D2, resistance mud resistance R1, filter capacitor EC1 composition current supply circuits, advantageously reduce Width funtion output inverse-excitation type switch power-supply
PWM IC current supply losses, and then reduction no-load power purpose is realized, electric energy is saved for terminal client, the utility model design is closed
Reason, simple in construction, cost is low, and reduces Width funtion output inverse-excitation type switch power-supply PWM IC current supply losses, realizes that reduction is unloaded
Power purpose.
Brief description of the drawings
Fig. 1 be the utility model proposes Width funtion export flyback power supply PWM IC power supply circuits part circuit structure
Schematic diagram；
Fig. 2 be the utility model proposes Width funtion export flyback power supply PWM IC power supply circuits part circuit structure
Schematic diagram；
Fig. 3 is the circuit structure signal that Width funtion of the prior art exports inverse-excitation type switch power-supply PWM IC power supply circuits
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.
Reference picture 1-2, Width funtion output flyback power supply PWM IC power supply circuits, including transformer T and power supply U1, power supply
U1 the 5th pin is connected to the one of filter capacitor EC1 positive pole, counnter attack filling diode D1 negative pole and damping resistance R1
End, the damping resistance R1 other end are connected with commutation diode D2 negative pole, and commutation diode D2 positive pole is auxiliary with transformer T's
Winding NVCC the 3rd pin is helped to connect, counnter attack filling diode D1 positive pole is connected with NPN type triode Q emitter stage, NPN type
Triode Q colelctor electrode is connected to one end of resistance R3 one end, filter capacitor EC2 positive pole and resistance R2, NPN type three
Pole pipe Q base stage and the resistance R3 other end are respectively connected with voltage-regulator diode Z negative pole, and the resistance R2 other end is connected with rectification
Diode D3 negative pole, commutation diode D3 positive pole are connected with transformer T assists winding NVCC the 5th pin, transformer T
The 8th pin be connected with two commutation diode D4 parallel with one another positive pole, transformer T the 10th pin is connected with filtered electrical
Hold EC3 negative pole, filter capacitor EC3 positive pole is connected with commutation diode D4 negative pole and power input voltage respectively.
In the present embodiment, power supply U1 the 2nd pin, filter capacitor EC1 negative pole, filter capacitor EC2 negative pole, filtered electrical
Negative pole, transformer T the 10th pin and the voltage-regulator diode Z positive pole for holding EC3 are grounded, transformer T assists winding NVCC
Formed for assists winding NVCC1 and assists winding NVCC2 two parts, wherein assists winding NVCC1 one end ground connection, assists winding
NVCC2 one end is connected with commutation diode D3 positive pole, the assists winding NVCC1 and assists winding NVCC2 other end with
Commutation diode D2 positive pole connection, filter capacitor EC1, filter capacitor EC2 and filter capacitor EC3 capacitance are respectively
10uF, 22uF and 470uF, damping resistance R1, resistance R2 and resistance R3 resistance value are respectively 3.3 Ω, 4.7 Ω, 100k Ω, surely
The magnitude of voltage for pressing diode Z is 12V.
In the present embodiment, pass through transformer T assists windings NVCC and commutation diode D3, resistance mud resistance R2, filtered electrical
Hold EC2, resistance R3, voltage-regulator diode Z, NPN type triode Q, counnter attack filling diode D1 and filter capacitor EC1 compositions to power back
Road, the convenient power supply when output voltage is upper limit 20V is by transformer T assists windings NVCC1 so that commutation diode D2, resistance mud
Resistance R1, filter capacitor EC1 form current supply circuit, now because NVCC1 voltages are powered to PWM IC U1 enough, can first provide electricity
Press and first powered to U1, U1 operating voltages exceed close to 12V, so this road voltage of NVCC is also in 12V, and have passed through the pole of NPN type three
Pipe Q fills diode D1 pressure drop with counnter attack, and then U1 will not pass through linear voltage stabilization and supply electricity to U1 generation electricity, and known linear voltage stabilization is not
Work will not produce loss, advantageously reduce Width funtion output inverse-excitation type switch power-supply PWM IC current supply losses, and then realize
No-load power purpose is reduced, electric energy is saved for terminal client.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art is in the technical scope that the utility model discloses, according to this practicality
New technical scheme and its utility model design are subject to equivalent substitution or change, should all cover in protection model of the present utility model
Within enclosing.
Claims (6)
1. Width funtion exports flyback power supply PWM IC power supply circuits, including transformer T and power supply U1, it is characterised in that described
Power supply U1 the 5th pin is connected to filter capacitor EC1 positive pole, counnter attack filling diode D1 negative pole and damping resistance R1's
One end, the other end of the damping resistance R1 are connected with commutation diode D2 negative pole, the positive pole of the commutation diode D2 with
Transformer T assists winding NVCC the 3rd pin connection, the positive pole that the counnter attack fills diode D1 are connected with NPN type triode Q
Emitter stage, the colelctor electrode of the NPN type triode Q is connected to resistance R3 one end, filter capacitor EC2 positive pole and electricity
R2 one end is hindered, the base stage of the NPN type triode Q and the resistance R3 other end are respectively connected with voltage-regulator diode Z negative pole, institute
The other end for stating resistance R2 is connected with commutation diode D3 negative pole, and the positive pole of the commutation diode D3 is auxiliary with transformer T's
Winding NVCC the 5th pin is helped to connect, the 8th pin of the transformer T is connected with two commutation diode D4 parallel with one another
Positive pole, the 10th pin of the transformer T is connected with filter capacitor EC3 negative pole, the positive pole difference of the filter capacitor EC3
It is connected with commutation diode D4 negative pole and power input voltage.
2. Width funtion according to claim 1 exports flyback power supply PWM IC power supply circuits, it is characterised in that the electricity
Source U1 the 2nd pin, filter capacitor EC1 negative pole, filter capacitor EC2 negative pole, filter capacitor EC3 negative pole, transformer T
10th pin and voltage-regulator diode Z positive pole are grounded.
3. Width funtion according to claim 1 exports flyback power supply PWM IC power supply circuits, it is characterised in that the change
Depressor T assists winding NVCC is assists winding NVCC1 and assists winding NVCC2 two parts are formed, wherein assists winding NVCC1
One end ground connection, assists winding NVCC2 one end be connected with commutation diode D3 positive pole, assists winding NVCC1 with aid in around
Positive pole of the group NVCC2 other end with commutation diode D2 is connected.
4. Width funtion according to claim 1 exports flyback power supply PWM IC power supply circuits, it is characterised in that the filter
Ripple electric capacity EC1, filter capacitor EC2 and filter capacitor EC3 capacitance are respectively 10uF, 22uF and 470uF.
5. Width funtion according to claim 1 exports flyback power supply PWM IC power supply circuits, it is characterised in that the resistance
Buffer resistance R1, resistance R2 and resistance R3 resistance value are respectively 3.3 Ω, 4.7 Ω, 100k Ω.
6. Width funtion according to claim 1 exports flyback power supply PWM IC power supply circuits, it is characterised in that described steady
The magnitude of voltage for pressing diode Z is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720189738.6U CN206628981U (en) | 2017-03-01 | 2017-03-01 | Width funtion exports flyback power supply PWM IC power supply circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720189738.6U CN206628981U (en) | 2017-03-01 | 2017-03-01 | Width funtion exports flyback power supply PWM IC power supply circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206628981U true CN206628981U (en) | 2017-11-10 |
Family
ID=60210290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720189738.6U Active CN206628981U (en) | 2017-03-01 | 2017-03-01 | Width funtion exports flyback power supply PWM IC power supply circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206628981U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114244077A (en) * | 2022-02-24 | 2022-03-25 | 深圳市暗能量电源有限公司 | Power supply circuit and power supply method suitable for wide voltage output |
| CN114285282A (en) * | 2022-02-28 | 2022-04-05 | 深圳原能电器有限公司 | Converter with wide voltage input and control method |
-
2017
- 2017-03-01 CN CN201720189738.6U patent/CN206628981U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114244077A (en) * | 2022-02-24 | 2022-03-25 | 深圳市暗能量电源有限公司 | Power supply circuit and power supply method suitable for wide voltage output |
| CN114285282A (en) * | 2022-02-28 | 2022-04-05 | 深圳原能电器有限公司 | Converter with wide voltage input and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105024534B (en) | Has the converter circuit of power factor correction | |
| CN203416169U (en) | Flyback power supply circuit | |
| CN102882410B (en) | A kind of single-phase seven electrical level inverters | |
| CN102611294B (en) | Single-stage PFC (Power Factor Correction) circuit with integrated Cuk circuit and Flyback circuit | |
| CN206628981U (en) | Width funtion exports flyback power supply PWM IC power supply circuits | |
| CN201904718U (en) | DC-DC converter | |
| CN104780692A (en) | Single-stage non-bridge LED driving circuit integrated by double Boost and Flyback | |
| CN202906742U (en) | Fly-back power source with power factor correction function | |
| CN207009368U (en) | A kind of new resistance-capacitance depressurization and relay drive circuit | |
| CN105896991B (en) | A kind of reversible transducer | |
| CN204967611U (en) | Compound high -efficient power factor correction circuit | |
| CN204481703U (en) | A kind of AC-DC change-over circuit | |
| CN206977756U (en) | A kind of DC DC step-down LED constant-current drive circuits | |
| CN202260992U (en) | Energy recovery circuit of ageing equipment | |
| CN204145289U (en) | Power starting circuit, inverse-excitation type switch power-supply circuit and inverse-excitation type switch power-supply | |
| CN204810150U (en) | Direct current - direct -current converter and contain its portable power source | |
| CN207896861U (en) | A kind of high efficiency auxiliary battery line | |
| CN104660069A (en) | Power conversion device and conversion method thereof | |
| CN206452297U (en) | A kind of circuit for suppressing LED booting moment surge current | |
| CN202713149U (en) | Direct-current booster circuit | |
| CN202617000U (en) | Step-up and step-down type conversion circuit capable of identifying in-phase control voltage | |
| CN202750017U (en) | Power supply circuit | |
| CN203278658U (en) | Switch power supply circuit | |
| CN201499087U (en) | Voltage boosting circuit | |
| CN202309509U (en) | Charge type power factor correction circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |