CN204993094U - Voltage -stabilized power circuit - Google Patents
Voltage -stabilized power circuit Download PDFInfo
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- CN204993094U CN204993094U CN201520377695.5U CN201520377695U CN204993094U CN 204993094 U CN204993094 U CN 204993094U CN 201520377695 U CN201520377695 U CN 201520377695U CN 204993094 U CN204993094 U CN 204993094U
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Abstract
The utility model discloses a voltage -stabilized power circuit, including transformer W, rectifier bridge T, electric capacity C1 and resistance R1, diode D4's positive pole and 220V alternating current are connected to transformer W's winding N1's one end, and diode D5's negative pole is connected to diode D4's negative pole, diode D5's plus earth, the other end of transformer W's winding N1's other end connection 220V alternating current. The utility model discloses charger power supply circuit structure is simple, and components and parts are few, has consequently practiced thrift the cost of manufacture to the debugging is convenient, the maintenance is simple, and the circuit uses high -gain operational amplifier as voltage comparing element simultaneously, combines triode realization output voltage's stability and overcurrent protection function, makes the circuit have precision height, fast, advantage that the steady voltage is effectual.
Description
Technical field
The utility model is related to a kind of power supply, specifically a kind of voltage-stabilized power supply circuit.
Background technology
With the development and the rise of mobile terminal of science and technology, many electronic installations require a voltage stabilizing adjustable DC power supply that precision is higher, electric current is larger.The direct current of voltage regulation source category of existing market is various, its mid and low-end products is especially more, although low-end product has the advantage of price with respect to high-end product, but quality often complies with one's wishes not to the utmost, although and high-end product reliable in quality, safety and stability, price is high also to allow people to hang back.And most of voltage of voltage regulation has the defects such as unitary function, short life, debugging maintenance difficult, therefore need to be improved.
Utility model content
The purpose of this utility model is to provide a kind of voltage-stabilized power supply circuit simple in construction, applied widely, the problem of to solve to propose in above-mentioned background technology.
To achieve the above object, the utility model provides following technical scheme：
A kind of voltage-stabilized power supply circuit,Including transformer W,Rectifier bridge T,Electric capacity C1 and resistance R1,The winding N1 of transformer W one end connection diode D4 anode and 220V alternating currents,Diode D4 negative electrode connection diode D5 negative electrode,Diode D5 plus earth,The transformer W winding N1 other end connects the other end of 220V alternating currents,Transformer W winding N2 two ends connect rectifier bridge T port 1 and rectifier bridge T port 3 respectively,The rectifier bridge T connection electric capacity C1 of port 2,Electric capacity C2,Resistance R1,Triode V1 colelctor electrode,Triode V4 colelctor electrode and triode V5 colelctor electrode,Triode V1 emitter stage connection resistance R2,Electric capacity C3,Diode D2 negative electrode and the pin 7 of chip IC 1,The electric capacity C1 other end connection electric capacity C2 other end,Electric capacity C3,Electric capacity C4,Electric capacity C5,Resistance R2,Resistance R5 diodes D1 anode,Diode D3 anode,A potentiometer RP1 fixing end,Rectifier bridge T port 4 and the pin 4 of chip IC 1,Diode D3 negative electrode connects resistance R4 and triode V2 colelctor electrode,Resistance R1 other end connection diode D1 negative electrode and triode V1 base stage,The triode V1 emitter stage connection electric capacity C3 other end,Resistance R3,Diode D2 negative electrode and the pin 7 of chip IC 1,The diode D2 anode connection resistance R2 other end and triode V2 base stage,The triode V2 emitter stage connection resistance R3 other end,The resistance R4 other end connection resistance R5 other end and the pin 3 of chip IC 1,The connection potentiometer of pin 2 RP1 of chip IC 1 sliding end,The connection resistance of pin 6 R6 of chip IC 1,Resistance R6 other end connecting triode B3 colelctor electrode and triode V4 base stage,Triode V3 emitter stage connection resistance R7,The electric capacity C4 other end,The electric capacity C5 other end,Resistance R8 and output voltage U1,Resistance R7 other end connection potentiometer RP1 another fixing end,Triode V4 emitter stage connecting triode V5 base stage,The triode V5 emitter stage connection resistance R8 other end and triode V3 base stage.
It is used as preferred scheme of the present utility model：The model UA741 of the chip IC 1.
It is used as preferred scheme of the present utility model：The diode D4 and diode D5 are voltage-regulator diode.
Compared with prior art, the beneficial effects of the utility model are：The utility model light source of charger circuit structure is simple; component is few; therefore cost of manufacture has been saved; and debug conveniently, it is easy to maintenance; circuit uses high gain operational amplifier as voltage comparing element simultaneously; the stabilization and overcurrent protection function of output voltage are realized with reference to triode so that circuit has the advantages that high precision, speed be fast, voltage regulation result is good.
Brief description of the drawings
Fig. 1 is the circuit diagram of voltage-stabilized power supply circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of the utility model protection.
Refer to Fig. 1,A kind of voltage-stabilized power supply circuit,Including transformer W,Rectifier bridge T,Electric capacity C1 and resistance R1,The winding N1 of transformer W one end connection diode D4 anode and 220V alternating currents,Diode D4 negative electrode connection diode D5 negative electrode,Diode D5 plus earth,The transformer W winding N1 other end connects the other end of 220V alternating currents,Transformer W winding N2 two ends connect rectifier bridge T port 1 and rectifier bridge T port 3 respectively,The rectifier bridge T connection electric capacity C1 of port 2,Electric capacity C2,Resistance R1,Triode V1 colelctor electrode,Triode V4 colelctor electrode and triode V5 colelctor electrode,Triode V1 emitter stage connection resistance R2,Electric capacity C3,Diode D2 negative electrode and the pin 7 of chip IC 1,The electric capacity C1 other end connection electric capacity C2 other end,Electric capacity C3,Electric capacity C4,Electric capacity C5,Resistance R2,Resistance R5 diodes D1 anode,Diode D3 anode,A potentiometer RP1 fixing end,Rectifier bridge T port 4 and the pin 4 of chip IC 1,Diode D3 negative electrode connects resistance R4 and triode V2 colelctor electrode,Resistance R1 other end connection diode D1 negative electrode and triode V1 base stage,The triode V1 emitter stage connection electric capacity C3 other end,Resistance R3,Diode D2 negative electrode and the pin 7 of chip IC 1,The diode D2 anode connection resistance R2 other end and triode V2 base stage,The triode V2 emitter stage connection resistance R3 other end,The resistance R4 other end connection resistance R5 other end and the pin 3 of chip IC 1,The connection potentiometer of pin 2 RP1 of chip IC 1 sliding end,The connection resistance of pin 6 R6 of chip IC 1,Resistance R6 other end connecting triode B3 colelctor electrode and triode V4 base stage,Triode V3 emitter stage connection resistance R7,The electric capacity C4 other end,The electric capacity C5 other end,Resistance R8 and output voltage U1,Resistance R7 other end connection potentiometer RP1 another fixing end,Triode V4 emitter stage connecting triode V5 base stage,The triode V5 emitter stage connection resistance R8 other end and triode V3 base stage.
The model UA741 of chip IC 1.Diode D4 and diode D5 are voltage-regulator diode.
Operation principle of the present utility model is：220V alternating currents become galvanic current after transformer W, rectifier bridge T and filter capacitor C1 and powered to potential circuit, the peak voltage clamper that diode D4 and diode D5 can produce transformer leakage inductance is to safety value, the sampling network being made up of in circuit resistance R7, potentiometer RP1 sends into an output voltage U1 part on the operational amplifier IC1 pin of end of oppisite phase 2, and compared with the reference voltage that in-phase end is made up of resistance R4, R5, D3, the amplified conducting for making amplifier output end control triode V1, so that regulated output voltage is constant.Electric capacity C2 is anti-self-excitation capacitance.V2 constitutes constant-current source circuit with D4, R2, R3.Ensure that voltage-stabiliser tube D3 operating current is constant, so as to make reference voltage stable.V3 and R8 plays overcurrent protection, when electric current is more than 1A, V3 conductings, and V1, V2 end, prevent excessively stream and damage circuit immediately.The burning voltage U1 of output can be adjusted with potentiometer RP1.Circuit structure is simple; component is few; therefore cost of manufacture has been saved; and debug conveniently, it is easy to maintenance; circuit uses high gain operational amplifier as voltage comparing element simultaneously; the stabilization and overcurrent protection function of output voltage are realized with reference to triode so that circuit has the advantages that high precision, speed be fast, voltage regulation result is good.
Claims (3)
1. a kind of voltage-stabilized power supply circuit,Including transformer W,Rectifier bridge T,Electric capacity C1 and resistance R1,It is characterized in that,The winding N1 of transformer W one end connection diode D4 anode and 220V alternating currents,Diode D4 negative electrode connection diode D5 negative electrode,Diode D5 plus earth,The transformer W winding N1 other end connects the other end of 220V alternating currents,Transformer W winding N2 two ends connect rectifier bridge T port 1 and rectifier bridge T port 3 respectively,The rectifier bridge T connection electric capacity C1 of port 2,Electric capacity C2,Resistance R1,Triode V1 colelctor electrode,Triode V4 colelctor electrode and triode V5 colelctor electrode,Triode V1 emitter stage connection resistance R2,Electric capacity C3,Diode D2 negative electrode and the pin 7 of chip IC 1,The electric capacity C1 other end connection electric capacity C2 other end,Electric capacity C3,Electric capacity C4,Electric capacity C5,Resistance R2,Resistance R5 diodes D1 anode,Diode D3 anode,A potentiometer RP1 fixing end,Rectifier bridge T port 4 and the pin 4 of chip IC 1,Diode D3 negative electrode connects resistance R4 and triode V2 colelctor electrode,Resistance R1 other end connection diode D1 negative electrode and triode V1 base stage,The triode V1 emitter stage connection electric capacity C3 other end,Resistance R3,Diode D2 negative electrode and the pin 7 of chip IC 1,The diode D2 anode connection resistance R2 other end and triode V2 base stage,The triode V2 emitter stage connection resistance R3 other end,The resistance R4 other end connection resistance R5 other end and the pin 3 of chip IC 1,The connection potentiometer of pin 2 RP1 of chip IC 1 sliding end,The connection resistance of pin 6 R6 of chip IC 1,Resistance R6 other end connecting triode B3 colelctor electrode and triode V4 base stage,Triode V3 emitter stage connection resistance R7,The electric capacity C4 other end,The electric capacity C5 other end,Resistance R8 and output voltage U1,Resistance R7 other end connection potentiometer RP1 another fixing end,Triode V4 emitter stage connecting triode V5 base stage,The triode V5 emitter stage connection resistance R8 other end and triode V3 base stage.
2. a kind of voltage-stabilized power supply circuit according to claim 1, it is characterised in that the model UA741 of the chip IC 1.
3. a kind of voltage-stabilized power supply circuit according to claim 1, it is characterised in that the diode D4 and diode D5 are voltage-regulator diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520377695.5U CN204993094U (en) | 2015-06-03 | 2015-06-03 | Voltage -stabilized power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520377695.5U CN204993094U (en) | 2015-06-03 | 2015-06-03 | Voltage -stabilized power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204993094U true CN204993094U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520377695.5U Expired - Fee Related CN204993094U (en) | 2015-06-03 | 2015-06-03 | Voltage -stabilized power circuit |
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| Country | Link |
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| CN (1) | CN204993094U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703671A (en) * | 2016-11-29 | 2017-05-24 | 廖婕 | Clean and sanitary electric window |
| CN107147074A (en) * | 2017-07-08 | 2017-09-08 | 佛山市正略信息科技有限公司 | A kind of overvoltage protection switch circuit based on voltage-regulator diode |
| CN107147312A (en) * | 2017-04-13 | 2017-09-08 | 成都卡诺源科技有限公司 | A kind of DC-stabilized circuit of high current output |
| CN108803369A (en) * | 2018-08-01 | 2018-11-13 | 合肥阅辞科技有限公司 | Wireless intelligent house system |
| CN110930666A (en) * | 2019-11-25 | 2020-03-27 | 广东诚安时代消防科技有限公司 | Wisdom city fire safety early warning system |
-
2015
- 2015-06-03 CN CN201520377695.5U patent/CN204993094U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703671A (en) * | 2016-11-29 | 2017-05-24 | 廖婕 | Clean and sanitary electric window |
| CN107147312A (en) * | 2017-04-13 | 2017-09-08 | 成都卡诺源科技有限公司 | A kind of DC-stabilized circuit of high current output |
| CN107147074A (en) * | 2017-07-08 | 2017-09-08 | 佛山市正略信息科技有限公司 | A kind of overvoltage protection switch circuit based on voltage-regulator diode |
| CN108803369A (en) * | 2018-08-01 | 2018-11-13 | 合肥阅辞科技有限公司 | Wireless intelligent house system |
| CN110930666A (en) * | 2019-11-25 | 2020-03-27 | 广东诚安时代消防科技有限公司 | Wisdom city fire safety early warning system |
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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: 20160120 Termination date: 20160603 |