CN204925860U - Constant voltage power supply - Google Patents
Constant voltage power supply Download PDFInfo
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- CN204925860U CN204925860U CN201520574224.3U CN201520574224U CN204925860U CN 204925860 U CN204925860 U CN 204925860U CN 201520574224 U CN201520574224 U CN 201520574224U CN 204925860 U CN204925860 U CN 204925860U
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- potentiometer
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Abstract
The utility model discloses a constant voltage power supply, including diode VD1, triode VT1, resistance R1, U1 is put to fortune, potentiometre R3, potentiometre R10 and triode VT2, potentiometre R10 is connected respectively to diode VD1 negative pole, potentiometre R10 gleitbretter, power VCC, U1 power end and resistance R8 are put to fortune, the potentiometre R10 other end passes through resistance R2 and connects triode VT1 projecting pole, ground resistance R1 is connected respectively to triode VT1 base and diode VD1 is anodal, potentiometre R3 is connected respectively to triode VT1 collecting electrode, potentiometre R3 gleitbretter and diode VD2 are anodal, ground connection diode VD3 negative pole is connected to diode VD2 negative pole. The utility model discloses constant voltage power supply output vo voltage is adjustable, and circuit structure is simple, and is small, with low costs, and stability is high, especially adapted using widely.
Description
Technical field
The utility model relates to a kind of power supply, specifically a kind of stabilized voltage supply.
Background technology
Although civil power is all 220V alternating current now, but the element drives such as device interior chip all be unable to do without direct supply, and for different elements, the required direct current power source voltage used is all variant, more existing direct supply adjustable accuracies are low, and do not have temperature compensation function, and circuit structure is complicated, volume is large, uses inconvenience.
Utility model content
The purpose of this utility model is to provide a kind of stabilized voltage supply, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of stabilized voltage supply, comprise diode VD1, triode VT1, resistance R1, amplifier U1, potentiometer R3, potentiometer R10 and triode VT2, described diode VD1 negative pole connects potentiometer R10 respectively, potentiometer R10 slide plate, power supply VCC, amplifier U1 power end and resistance R8, the potentiometer R10 other end is by resistance R2 connecting triode VT1 emitter, triode VT1 base stage connects stake resistance R1 and diode VD1 positive pole respectively, triode VT1 collector connects potentiometer R3 respectively, potentiometer R3 slide plate and diode VD2 positive pole, diode VD2 negative pole connects ground connection diode VD3 negative pole, the potentiometer R3 other end connects earthing potential device R4, potentiometer R4 slide plate connects amplifier U1 in-phase input end, amplifier U1 inverting input connects stake resistance R5 and resistance R6 respectively, the resistance R6 other end is connecting triode VT2 emitter respectively, resistance R9 and output end vo, triode VT2 collector is connecting triode VT3 base stage and resistance R7 respectively, the resistance R7 other end connects amplifier U1 output terminal, triode VT3 emitter is connecting triode VT2 base stage and the resistance R9 other end respectively, the triode VT3 collector contact resistance R8 other end.
As further program of the utility model: described diode VD3 is voltage stabilizing diode.
As further program of the utility model: described amplifier U1 adopts LM324.
As the utility model further scheme: described power supply VCC voltage is 28V.
Compared with prior art, the beneficial effects of the utility model are: the utility model output end of stabilized voltage supply Vo voltage is adjustable, and circuit structure is simple, and volume is little, and cost is low, and stability is high, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of stabilized voltage supply.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of stabilized voltage supply, comprise diode VD1, triode VT1, resistance R1, amplifier U1, potentiometer R3, potentiometer R10 and triode VT2, diode VD1 negative pole connects potentiometer R10 respectively, potentiometer R10 slide plate, power supply VCC, amplifier U1 power end and resistance R8, the potentiometer R10 other end is by resistance R2 connecting triode VT1 emitter, triode VT1 base stage connects stake resistance R1 and diode VD1 positive pole respectively, triode VT1 collector connects potentiometer R3 respectively, potentiometer R3 slide plate and diode VD2 positive pole, diode VD2 negative pole connects ground connection diode VD3 negative pole, the potentiometer R3 other end connects earthing potential device R4, potentiometer R4 slide plate connects amplifier U1 in-phase input end, amplifier U1 inverting input connects stake resistance R5 and resistance R6 respectively, the resistance R6 other end is connecting triode VT2 emitter respectively, resistance R9 and output end vo, triode VT2 collector is connecting triode VT3 base stage and resistance R7 respectively, the resistance R7 other end connects amplifier U1 output terminal, triode VT3 emitter is connecting triode VT2 base stage and the resistance R9 other end respectively, the triode VT3 collector contact resistance R8 other end.
Diode VD3 is voltage stabilizing diode.
Amplifier U1 adopts LM324.
Power supply VCC voltage is 28V
Principle of work of the present utility model is: refer to Fig. 1, transistor VT1 and stabilivolt VD1 forms simple constant-current circuit, electric current is remained unchanged, obtain sufficiently stable reference voltage, R1 is the current-limiting resistance of VD1, employing conventional, electric-resistance, the working current of R2 control VD2, need to adjust, the operating voltage just adjustable output end vo voltage of VD2 is regulated with potentiometer R10, if but output end vo voltage all feeds back to the inverting input of U1, the then the highest stable point voltage can only being transferred to VD2 of output end vo voltage, therefore, adopt R5 and R6 dividing potential drop feedback, R5 and R6 adopts the metalfilmresistor of the low-temperature coefficient of 10k about Ω, R7 is for the protection of amplifier, resistance is 100 Ω ~ 1k Ω, R8 is used for alleviating VT3 burden, this circuit output voltage is 0 ~ 20V.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (4)
1. a stabilized voltage supply, comprise diode VD1, triode VT1, resistance R1, amplifier U1, potentiometer R3, potentiometer R10 and triode VT2, it is characterized in that, described diode VD1 negative pole connects potentiometer R10 respectively, potentiometer R10 slide plate, power supply VCC, amplifier U1 power end and resistance R8, the potentiometer R10 other end is by resistance R2 connecting triode VT1 emitter, triode VT1 base stage connects stake resistance R1 and diode VD1 positive pole respectively, triode VT1 collector connects potentiometer R3 respectively, potentiometer R3 slide plate and diode VD2 positive pole, diode VD2 negative pole connects ground connection diode VD3 negative pole, the potentiometer R3 other end connects earthing potential device R4, potentiometer R4 slide plate connects amplifier U1 in-phase input end, amplifier U1 inverting input connects stake resistance R5 and resistance R6 respectively, the resistance R6 other end is connecting triode VT2 emitter respectively, resistance R9 and output end vo, triode VT2 collector is connecting triode VT3 base stage and resistance R7 respectively, the resistance R7 other end connects amplifier U1 output terminal, triode VT3 emitter is connecting triode VT2 base stage and the resistance R9 other end respectively, the triode VT3 collector contact resistance R8 other end.
2. stabilized voltage supply according to claim 1, is characterized in that, described diode VD3 is voltage stabilizing diode.
3. stabilized voltage supply according to claim 1, is characterized in that, described amplifier U1 adopts LM324.
4. stabilized voltage supply according to claim 1, is characterized in that, described power supply VCC voltage is 28V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520574224.3U CN204925860U (en) | 2015-08-03 | 2015-08-03 | Constant voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520574224.3U CN204925860U (en) | 2015-08-03 | 2015-08-03 | Constant voltage power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204925860U true CN204925860U (en) | 2015-12-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520574224.3U Expired - Fee Related CN204925860U (en) | 2015-08-03 | 2015-08-03 | Constant voltage power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204925860U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087048A (en) * | 2019-05-24 | 2019-08-02 | 广州触派电子科技有限公司 | Projector system |
-
2015
- 2015-08-03 CN CN201520574224.3U patent/CN204925860U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087048A (en) * | 2019-05-24 | 2019-08-02 | 广州触派电子科技有限公司 | Projector 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20160803 |