CN204809938U - Vehicle mounted power adapter - Google Patents
Vehicle mounted power adapter Download PDFInfo
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- CN204809938U CN204809938U CN201520541440.8U CN201520541440U CN204809938U CN 204809938 U CN204809938 U CN 204809938U CN 201520541440 U CN201520541440 U CN 201520541440U CN 204809938 U CN204809938 U CN 204809938U
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Abstract
The utility model discloses a vehicle mounted power adapter, including three terminal regulator U1, resistance R1, electric capacity C1, triode VT1, diode D1, diode VD1 and triode VT1, the diode D1 positive pole VCC that connects, electric capacity C1 and three terminal regulator U1 input are connected respectively to diode D1 negative pole, the electric capacity C1 other end is connected respectively to the three terminal regulator U1 earthing terminal, electric capacity C2, electric capacity C4, diode VD1 is anodal, resistance R3, resistance R5, the emitting diode D4 negative pole, potentiometre RP, electric capacity C3, resistance R8 with treat rechargable battery negative pole and ground connection, the three terminal regulator U1 output is connected respectively to the electric capacity C2 other end, the electric capacity C4 other end, resistance R1, resistance R2, triode VT2 collecting electrode and triode VT3 projecting pole. The utility model discloses vehicle mounted power adapter circuit structure is simple, and is small, with low costs, except using the steady voltage off -chip, does not use any chip element, and the interference killing feature is strong, and stability is high, especially adapted using widely.
Description
Technical field
The utility model relates to a kind of power supply adaptor, specifically a kind of vehicle-mounted power adapter.
Background technology
Along with the popularization of portable equipment, people also get more and more for the demand of portable equipment, but the problem that existing portable equipment ubiquity continuation of the journey is not enough, a lot of people can be portable equipment charging in the automobile of oneself, vehicle-mounted power adapter arises at the historic moment, but more existing vehicle-mounted power adapters exist, and volume is large, stability is low, the more high defect of price.
Utility model content
The purpose of this utility model is the vehicle-mounted power adapter providing a kind of volume little, 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 vehicle-mounted power adapter, comprises three terminal regulator U1, resistance R1, electric capacity C1, triode VT1, diode D1, diode VD1 and triode VT1, described diode D1 positive pole connects power supply VCC, and diode D1 negative pole connects electric capacity C1 and three terminal regulator U1 input respectively, and three terminal regulator U1 earth terminal connects the electric capacity C1 other end respectively, electric capacity C2, electric capacity C4, diode VD1 positive pole, resistance R3, resistance R5, light-emitting diode D4 negative pole, potentiometer RP, electric capacity C3, resistance R8 and pond to be charged negative pole ground connection, the electric capacity C2 other end connects three terminal regulator U1 output respectively, the electric capacity C4 other end, resistance R1, resistance R2, triode VT2 collector electrode and triode VT3 emitter, the resistance R2 other end is connecting triode VT3 base stage and triode VT1 collector electrode respectively, triode VT1 base stage is the contact resistance R1 other end and diode VD1 negative pole respectively, triode VT1 emitter is the contact resistance R3 other end and triode VT2 emitter respectively, triode VT2 base stage is the contact resistance R5 other end and resistance R4 respectively, the resistance R4 other end connects diode D2 positive pole and triode VT3 collector electrode respectively, and diode D2 negative pole is contact resistance R6 respectively, the potentiometer RP other end, light-emitting diode D3 positive pole and pond to be charged positive pole, resistance R6 other end connecting luminous diode D4 positive pole, described potentiometer RP slide plate contact resistance R7, the resistance R7 other end connects the electric capacity C3 other end and diode VD2 negative pole respectively, diode VD2 positive pole connecting triode VT4 base stage, the triode VT4 emitter contact resistance R8 other end, triode VT4 collector electrode connecting luminous diode D3 negative pole.
As further program of the utility model: described three terminal regulator U1 adopts 7805.
As the utility model further scheme: described power supply VCC voltage is 12V, obtains from automobile batteries through cigarette lighter socket.
Compared with prior art, the beneficial effects of the utility model are: the utility model vehicle-mounted power adapter circuit structure is simple, and volume is little, cost is low, except using voltage stabilizing chip, do not use any chip component, antijamming capability is strong, stability is high, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of vehicle-mounted 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 vehicle-mounted power adapter, comprises three terminal regulator U1, resistance R1, electric capacity C1, triode VT1, diode D1, diode VD1 and triode VT1, diode D1 positive pole connects power supply VCC, and diode D1 negative pole connects electric capacity C1 and three terminal regulator U1 input respectively, and three terminal regulator U1 earth terminal connects the electric capacity C1 other end respectively, electric capacity C2, electric capacity C4, diode VD1 positive pole, resistance R3, resistance R5, light-emitting diode D4 negative pole, potentiometer RP, electric capacity C3, resistance R8 and pond to be charged negative pole ground connection, the electric capacity C2 other end connects three terminal regulator U1 output respectively, the electric capacity C4 other end, resistance R1, resistance R2, triode VT2 collector electrode and triode VT3 emitter, the resistance R2 other end is connecting triode VT3 base stage and triode VT1 collector electrode respectively, triode VT1 base stage is the contact resistance R1 other end and diode VD1 negative pole respectively, triode VT1 emitter is the contact resistance R3 other end and triode VT2 emitter respectively, triode VT2 base stage is the contact resistance R5 other end and resistance R4 respectively, the resistance R4 other end connects diode D2 positive pole and triode VT3 collector electrode respectively, and diode D2 negative pole is contact resistance R6 respectively, the potentiometer RP other end, light-emitting diode D3 positive pole and pond to be charged positive pole, resistance R6 other end connecting luminous diode D4 positive pole, potentiometer RP slide plate contact resistance R7, the resistance R7 other end connects the electric capacity C3 other end and diode VD2 negative pole respectively, diode VD2 positive pole connecting triode VT4 base stage, the triode VT4 emitter contact resistance R8 other end, triode VT4 collector electrode connecting luminous diode D3 negative pole.
Three terminal regulator U1 adopts 7805.
Power supply VCC voltage is 12V, obtains from automobile batteries through cigarette lighter socket.
Operation principle of the present utility model is: refer to Fig. 1, triode VT1 and VT2 forms a pair differential amplifier, VT1 base voltage is stabilized in 3V by voltage stabilizing didoe VD1, VT2 base voltage then obtains through R3 and R4 dividing potential drop, VT1 and VT2 compares base voltage mutually, and regulates the base current of current amplifier VT3 accordingly.
Triode VT3 is connected into current amplifier, for charging provides sufficient electric current, R3 is at differential amplifier regulation output voltage, significant role is played in the process of electric current, VT1 by the electric current of R3, VT2 emitter current sum, the 6V power supply that VT2 collector electrode exports owing to directly connecting three terminal regulator U1, its collector current is fixing, therefore VT3 base current is with the size of current change flowing through R2 and R3, this design can make charging voltage and current stabilization, any change of output voltage is all detected by triode VT1 and VT2, and regulate the base current of VT3 accordingly.
The power supply supply of adapter obtains from 12v automobile batteries through cigarette lighter socket, and 12V input voltage is reduced to 6V by voltage stabilizing chip 7806, and restriction outputs current to 1A.
D4 and D3 is used to refer to respectively " charging " and the situation of " charging full ", after pond to be charged is connected to adapter, D4 luminescence represents " charging ", now D3 keeps extinguishing, the effect of voltage stabilizing didoe VD2 is a diode switch, and it only drives VT4 to enter conduction state when cell voltage to be charged exceedes set point, make D3 luminous, instruction " charging full ", this set point can regulate with RP.
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 (3)
1. a vehicle-mounted power adapter, comprises three terminal regulator U1, resistance R1, electric capacity C1, triode VT1, diode D1, diode VD1 and triode VT1, is characterized in that, described diode D1 positive pole connects power supply VCC, and diode D1 negative pole connects electric capacity C1 and three terminal regulator U1 input respectively, and three terminal regulator U1 earth terminal connects the electric capacity C1 other end respectively, electric capacity C2, electric capacity C4, diode VD1 positive pole, resistance R3, resistance R5, light-emitting diode D4 negative pole, potentiometer RP, electric capacity C3, resistance R8 and pond to be charged negative pole ground connection, the electric capacity C2 other end connects three terminal regulator U1 output respectively, the electric capacity C4 other end, resistance R1, resistance R2, triode VT2 collector electrode and triode VT3 emitter, the resistance R2 other end is connecting triode VT3 base stage and triode VT1 collector electrode respectively, triode VT1 base stage is the contact resistance R1 other end and diode VD1 negative pole respectively, triode VT1 emitter is the contact resistance R3 other end and triode VT2 emitter respectively, triode VT2 base stage is the contact resistance R5 other end and resistance R4 respectively, the resistance R4 other end connects diode D2 positive pole and triode VT3 collector electrode respectively, and diode D2 negative pole is contact resistance R6 respectively, the potentiometer RP other end, light-emitting diode D3 positive pole and pond to be charged positive pole, resistance R6 other end connecting luminous diode D4 positive pole, described potentiometer RP slide plate contact resistance R7, the resistance R7 other end connects the electric capacity C3 other end and diode VD2 negative pole respectively, diode VD2 positive pole connecting triode VT4 base stage, the triode VT4 emitter contact resistance R8 other end, triode VT4 collector electrode connecting luminous diode D3 negative pole.
2. vehicle-mounted power adapter according to claim 1, is characterized in that, described three terminal regulator U1 adopts 7805.
3. vehicle-mounted power adapter according to claim 1, is characterized in that, described power supply VCC voltage is 12V, obtains from automobile batteries through cigarette lighter socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520541440.8U CN204809938U (en) | 2015-07-24 | 2015-07-24 | Vehicle mounted power adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520541440.8U CN204809938U (en) | 2015-07-24 | 2015-07-24 | Vehicle mounted power adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204809938U true CN204809938U (en) | 2015-11-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520541440.8U Expired - Fee Related CN204809938U (en) | 2015-07-24 | 2015-07-24 | Vehicle mounted power adapter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204809938U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017128207A1 (en) * | 2016-01-28 | 2017-08-03 | 深圳瀚飞科技开发有限公司 | Automatic-reset voltage stabilizing circuit |
| CN108390429A (en) * | 2018-02-22 | 2018-08-10 | 唐丙振 | A kind of Multifunctional charger baby |
-
2015
- 2015-07-24 CN CN201520541440.8U patent/CN204809938U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017128207A1 (en) * | 2016-01-28 | 2017-08-03 | 深圳瀚飞科技开发有限公司 | Automatic-reset voltage stabilizing circuit |
| CN108390429A (en) * | 2018-02-22 | 2018-08-10 | 唐丙振 | A kind of Multifunctional charger baby |
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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: 20151125 Termination date: 20170724 |