CN204835958U - Small -size power adapter - Google Patents
Small -size power adapter Download PDFInfo
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- CN204835958U CN204835958U CN201520541491.0U CN201520541491U CN204835958U CN 204835958 U CN204835958 U CN 204835958U CN 201520541491 U CN201520541491 U CN 201520541491U CN 204835958 U CN204835958 U CN 204835958U
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Abstract
The utility model discloses a small -size power adapter, including transformer T1, rectifier bridge Q, transformer T2, resistance R1, electric capacity C1, chip U1 and opto -coupler U2, electric capacity C1 one end is connecting resistance R1 respectively, transformer T2 coil L4 and 220V alternating current one end, the electric capacity C1 other end is connected respectively to the 220V alternating current other end, the resistance R1 other end and transformer T2 coil L5, rectifier bridge Q pin 1 is connected to the transformer T2 coil L4 other end, the transformer T2 coil L5 other end is connected to rectifier bridge Q pin 4, 3 ground connection of rectifier bridge Q pin, grounded capacitance C2 is connected respectively to rectifier bridge Q pin 2, resistance R3, resistance R5, electric capacity C3, resistance R6 and transformer T1 coil L2. The utility model discloses small -size power adapter circuit structure is simple, and small, with low costs, the interference killing feature is strong, can change output voltage through the intrinsic standoff ratio that changes R9, R10 and R11, can the various power equipment of adaptation, and especially adapted using widely.
Description
Technical field
The utility model relates to a kind of power supply adaptor, specifically a kind of small-sized power adapter.
Background technology
Existing a lot of plant equipment all must connect power supply adaptor can utilize the work of alternating current 220V civil power, and the miniaturization of power supply adaptor is the emphasis of all trades and professions research always.
Utility model content
The purpose of this utility model is to provide a kind of small-sized power adapter, 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 small-sized power adapter, comprises transformer T1, rectifier bridge Q, transformer T2, resistance R1, electric capacity C1, chip U1 and optocoupler U2, described electric capacity C1 one end is contact resistance R1 respectively, transformer T2 coil L4 and 220V alternating current one end, the 220V alternating current other end connects the electric capacity C1 other end respectively, the resistance R1 other end and transformer T2 coil L5, the transformer T2 coil L4 other end connects rectifier bridge Q pin 1, the rectifier bridge Q pin 4 connection transformer T2 coil L5 other end, rectifier bridge Q pin 3 ground connection, and rectifier bridge Q pin 2 connects ground capacity C2 respectively, resistance R3, resistance R5, electric capacity C3, resistance R6 and transformer T1 coil L2, the resistance R5 other end connects the electric capacity C3 other end and diode VD1 negative pole respectively, and diode VD1 positive pole connects electric capacity C4 respectively, the transformer T1 coil L2 other end and chip U1 pin 5, the electric capacity C4 other end contact resistance R6 other end, the described resistance R3 other end connects chip U1 pin 4 respectively, ground connection diode VD4 negative pole and optocoupler U2 pin 1, chip U1 pin 1 connect ground capacity C7, chip U1 pin 2 ground connection, optocoupler U2 pin 2 ground connection, optocoupler U2 pin 3 contact resistance R7, optocoupler U2 pin 3 contact resistance R7, the resistance R7 other end connects ground capacity C5 respectively, diode VD2 negative pole, ground connection diode VD3 negative pole, inductance L 1, resistance R8, resistance R9 and resistance R10, diode VD2 positive pole connection transformer T1 coil L3, transformer T1 coil L3 other end ground connection, described inductance L 1 other end connects ground capacity C6 and output end vo respectively, and described optocoupler U2 pin 4 connects ground capacity C9 respectively, the resistance R8 other end, the K pole of electric capacity C10 and one-way SCR VS, the A pole ground connection of one-way SCR VS, the G pole of one-way SCR VS connects the electric capacity C10 other end respectively, earth resistance R11, the resistance R9 other end and the resistance R10 other end, described chip U1 model is TNY266P.
As the utility model further scheme: described optocoupler U2 adopts PC817.
Compared with prior art, the beneficial effects of the utility model are: the utility model small-sized power adapter circuit structure is simple, volume is little, cost is low, antijamming capability is strong, output voltage can be changed by the voltage ratio changing R9, R10 and R11, can adaptive various power equipment, be applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of small-sized power adapter.
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 small-sized power adapter, comprises transformer T1, rectifier bridge Q, transformer T2, resistance R1, electric capacity C1, chip U1 and optocoupler U2, electric capacity C1 one end is contact resistance R1 respectively, transformer T2 coil L4 and 220V alternating current one end, the 220V alternating current other end connects the electric capacity C1 other end respectively, the resistance R1 other end and transformer T2 coil L5, the transformer T2 coil L4 other end connects rectifier bridge Q pin 1, the rectifier bridge Q pin 4 connection transformer T2 coil L5 other end, rectifier bridge Q pin 3 ground connection, and rectifier bridge Q pin 2 connects ground capacity C2 respectively, resistance R3, resistance R5, electric capacity C3, resistance R6 and transformer T1 coil L2, the resistance R5 other end connects the electric capacity C3 other end and diode VD1 negative pole respectively, and diode VD1 positive pole connects electric capacity C4 respectively, the transformer T1 coil L2 other end and chip U1 pin 5, the electric capacity C4 other end contact resistance R6 other end, the resistance R3 other end connects chip U1 pin 4 respectively, ground connection diode VD4 negative pole and optocoupler U2 pin 1, chip U1 pin 1 connect ground capacity C7, chip U1 pin 2 ground connection, optocoupler U2 pin 2 ground connection, optocoupler U2 pin 3 contact resistance R7, optocoupler U2 pin 3 contact resistance R7, the resistance R7 other end connects ground capacity C5 respectively, diode VD2 negative pole, ground connection diode VD3 negative pole, inductance L 1, resistance R8, resistance R9 and resistance R10, diode VD2 positive pole connection transformer T1 coil L3, transformer T1 coil L3 other end ground connection, inductance L 1 other end connects ground capacity C6 and output end vo respectively, and optocoupler U2 pin 4 connects ground capacity C9 respectively, the resistance R8 other end, the K pole of electric capacity C10 and one-way SCR VS, the A pole ground connection of one-way SCR VS, the G pole of one-way SCR VS connects the electric capacity C10 other end respectively, earth resistance R11, the resistance R9 other end and the resistance R10 other end, chip U1 model is TNY266P.
Optocoupler U2 adopts PC817.
Operation principle of the present utility model is: refer to Fig. 1; clamper and absorbing circuit is formed by R5, C3, VD1 and R6, C4; the peak voltage produced by high frequency transformer T1 coil L2 leakage inductance when one-way SCR VS turns off can be absorbed in; protection one-way SCR VS is not damaged, and R3 is input under voltage threshold value setting resistance.
The high frequency voltage that high frequency transformer T2 exports, after fast recovery diode VD2, C5, L1 and C6 rectification, filtering, obtains stable output voltage at output end vo.Accurate optocoupler feedback circuit is made up of chip U1 and optocoupler U2, output end vo voltage obtains sampled voltage by resitstance voltage divider R9, R10 and R11, rear generation error voltage is compared with the reference voltage in one-way SCR VS, the control end electric current changing chip U1 is removed again through optocoupler U2, duty ratio is changed, and then regulation output end Vo voltage remains unchanged, the voltage ratio changing R9, R10 and R11 can change output voltage.
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 specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (2)
1. a small-sized power adapter, comprises transformer T1, rectifier bridge Q, transformer T2, resistance R1, electric capacity C1, chip U1 and optocoupler U2, is characterized in that, described electric capacity C1 one end is contact resistance R1 respectively, transformer T2 coil L4 and 220V alternating current one end, the 220V alternating current other end connects the electric capacity C1 other end respectively, the resistance R1 other end and transformer T2 coil L5, the transformer T2 coil L4 other end connects rectifier bridge Q pin 1, the rectifier bridge Q pin 4 connection transformer T2 coil L5 other end, rectifier bridge Q pin 3 ground connection, and rectifier bridge Q pin 2 connects ground capacity C2 respectively, resistance R3, resistance R5, electric capacity C3, resistance R6 and transformer T1 coil L2, the resistance R5 other end connects the electric capacity C3 other end and diode VD1 negative pole respectively, and diode VD1 positive pole connects electric capacity C4 respectively, the transformer T1 coil L2 other end and chip U1 pin 5, the electric capacity C4 other end contact resistance R6 other end, the described resistance R3 other end connects chip U1 pin 4 respectively, ground connection diode VD4 negative pole and optocoupler U2 pin 1, chip U1 pin 1 connect ground capacity C7, chip U1 pin 2 ground connection, optocoupler U2 pin 2 ground connection, optocoupler U2 pin 3 contact resistance R7, optocoupler U2 pin 3 contact resistance R7, the resistance R7 other end connects ground capacity C5 respectively, diode VD2 negative pole, ground connection diode VD3 negative pole, inductance L 1, resistance R8, resistance R9 and resistance R10, diode VD2 positive pole connection transformer T1 coil L3, transformer T1 coil L3 other end ground connection, described inductance L 1 other end connects ground capacity C6 and output end vo respectively, and described optocoupler U2 pin 4 connects ground capacity C9 respectively, the resistance R8 other end, the K pole of electric capacity C10 and one-way SCR VS, the A pole ground connection of one-way SCR VS, the G pole of one-way SCR VS connects the electric capacity C10 other end respectively, earth resistance R11, the resistance R9 other end and the resistance R10 other end, described chip U1 model is TNY266P.
2. small-sized power adapter according to claim 1, is characterized in that, described optocoupler U2 adopts PC817.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520541491.0U CN204835958U (en) | 2015-07-24 | 2015-07-24 | Small -size power adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520541491.0U CN204835958U (en) | 2015-07-24 | 2015-07-24 | Small -size power adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204835958U true CN204835958U (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520541491.0U Expired - Fee Related CN204835958U (en) | 2015-07-24 | 2015-07-24 | Small -size power adapter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204835958U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019061824A1 (en) * | 2017-09-27 | 2019-04-04 | 深圳光峰科技股份有限公司 | Optical coupling overvoltage protection circuit and related electrical appliance |
-
2015
- 2015-07-24 CN CN201520541491.0U patent/CN204835958U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019061824A1 (en) * | 2017-09-27 | 2019-04-04 | 深圳光峰科技股份有限公司 | Optical coupling overvoltage protection circuit and related electrical appliance |
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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: 20151202 Termination date: 20170724 |