CN207530701U - A kind of power supply adaptor input current protects integrated circuit - Google Patents
A kind of power supply adaptor input current protects integrated circuit Download PDFInfo
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- CN207530701U CN207530701U CN201721756796.9U CN201721756796U CN207530701U CN 207530701 U CN207530701 U CN 207530701U CN 201721756796 U CN201721756796 U CN 201721756796U CN 207530701 U CN207530701 U CN 207530701U
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- resistance
- triode
- power supply
- supply adaptor
- integrated circuit
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Abstract
The utility model discloses a kind of power supply adaptor input currents to protect integrated circuit, including triode V1, the collector of the triode V1 is connected with one end of resistance R1, the anode of input terminal U0, one end of resistance R3, one end of resistance R4, one end of resistance R5 and the anode of output terminal U1, the base stage of triode V1 is connected with the other end of resistance R1 and the anode of diode D, the cathode of diode D is connected with the cathode of input terminal U0 and one end of resistance R2, the other end of resistance R2 is connected with the cathode of output terminal U1 and the emitter of triode V1, the other end ground connection of resistance R2, the other end of resistance R3 is connected with the collector of triode V2, the emitter of triode V2 is connected with one end of capacitance C.The utility model so as to be effectively protected power supply adaptor, and by triode V2 and resistance R3, is prevented current overload from being damaged to power adaptation, ensure that power supply adaptor being capable of normal operation by triode V1 and R1.
Description
Technical field
The utility model is related to power supply adaptor technical field more particularly to a kind of power supply adaptor input current protection collection
Into circuit.
Background technology
Power supply adaptor is the power supply conversion equipment of small portable electronic device and electronic apparatus, generally by outer
The components compositions such as shell, transformer, inductance, capacitance, control IC, PCV plate, its operation principle are converted to direct current by exchange input
Output；It can be divided into Direct Plug-In and Table top type by connection mode, be matched in security protection camera extensively, set-top box, router, lamp bar,
In the equipment such as massage device, the input current at present in power supply adaptor is unstable, and input current easily overloads, and easily causes
The damage of power supply adaptor, thus it is above-mentioned for solving we have proposed a kind of power supply adaptor input current protection integrated circuit
Problem.
Utility model content
The purpose of this utility model is and a kind of power supply adaptor proposed in order to solve shortcoming in the prior art
Input current protects integrated circuit.
To achieve these goals, the utility model employs following technical solution：
A kind of power supply adaptor input current protects integrated circuit, including triode V1, the collector of the triode V1
It is connected with one end of resistance R1, the anode of input terminal U0, one end of resistance R3, one end of resistance R4, one end of resistance R5 and defeated
The anode of outlet U1, the base stage of the triode V1 are connected with the other end of resistance R1 and the anode of diode D, the diode
The cathode of D is connected with the cathode of input terminal U0 and one end of resistance R2, and the other end of the resistance R2 is connected with output terminal U1's
The emitter of cathode and triode V1, and the other end ground connection of resistance R2；
The other end of the resistance R3 is connected with the collector of triode V2, and the emitter of the triode V2 is connected with
One end of capacitance C, the base stage of the triode V2 are connected with the other end of resistance R4 and the collector of triode V3, and described three
The base stage of pole pipe V3 is connected with the other end of resistance R5 and one end of resistance R6, the other end ground connection of the capacitance C, three pole
The emitter of pipe V3 is connected with the other end of resistance R6 and the cathode of output terminal U1, and the emitter ground connection of triode V3.
Preferably, the input voltage of the anode of the input terminal U0 is AC 220 V.
Preferably, the resistance value of the resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6 are followed successively by 1K
Ω, 1K Ω, 800 Ω, 600 Ω, 400 Ω and 200 Ω.
Preferably, the model D71N4003 of the diode D.
Preferably, the model of the triode V1, triode V2 and triode V3 are 1N5551.
Preferably, the capacitance of the capacitance C is 220uF.
Compared with prior art, the beneficial effects of the utility model are：By triode V1 and with metering function electricity
R1 composition current circuits are hindered, so as to be effectively protected power supply adaptor, pass through triode V2, triode V3, resistance R2, resistance
R3, resistance R4, resistance R5 and resistance R6 are matched, triode V2, triode V3, resistance R2, resistance R3, resistance R4, resistance R5
Loop of voltage regulation is constituted with resistance R6, prevents current overload from being damaged to power adaptation, ensure that power supply adaptor can be just
Often operation, the utility model so as to be effectively protected power supply adaptor, and pass through triode V2 by triode V1 and R1
It with resistance R3, prevents current overload from being damaged to power adaptation, ensure that power supply adaptor being capable of normal operation.
Description of the drawings
Fig. 1 be the utility model proposes a kind of power supply adaptor input current protect integrated circuit circuit diagram.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.
With reference to Fig. 1, a kind of power supply adaptor input current protects integrated circuit, including triode V1, the collection of triode V1
Electrode be connected with one end of resistance R1, the anode of input terminal U0, one end of resistance R3, one end of resistance R4, resistance R5 one end
With the anode of output terminal U1, the base stage of triode V1 is connected with the other end of resistance R1 and the anode of diode D, diode D's
Cathode is connected with the cathode of input terminal U0 and one end of resistance R2, and the other end of resistance R2 is connected with the cathode and three of output terminal U1
The emitter of pole pipe V1, and the other end ground connection of resistance R2；The other end of resistance R3 is connected with the collector of triode V2, three poles
The emitter of pipe V2 is connected with one end of capacitance C, and the base stage of triode V2 is connected with the other end of resistance R4 and triode V3
Collector, the base stage of triode V3 are connected with the other end of resistance R5 and one end of resistance R6, and the other end of capacitance C is grounded, and three
The emitter of pole pipe V3 is connected with the other end of resistance R6 and the cathode of output terminal U1, and the emitter ground connection of triode V3, leads to
Triode V1 and the resistance R1 composition current circuits with metering function are crossed, so as to be effectively protected power supply adaptor, is passed through
Triode V2, triode V3, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6 are matched, triode V2, triode
V3, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6 constitute loop of voltage regulation, prevent current overload from being made to power adaptation
Into damage, ensure that power supply adaptor can normal operation, the utility model is by triode V1 and R1, so as to be effectively protected
Power supply adaptor, and by triode V2 and resistance R3, prevent current overload from being damaged to power adaptation, ensure that electricity
Source adapter being capable of normal operation.
In the utility model, the input voltage of the anode of input terminal U0 is AC 220 V, resistance R1, resistance R2, resistance
R3, resistance R4, resistance R5 and resistance R6 resistance value be followed successively by 1K Ω, 1K Ω, 800 Ω, 600 Ω, 400 Ω and 200 Ω, two poles
The model of the model D71N4003 of pipe D, triode V1, triode V2 and triode V3 are 1N5551, the capacitance of capacitance C
For 220uF, by triode V1 and the resistance R1 with metering function forms current circuit, is fitted so as to be effectively protected power supply
Orchestration is matched, triode by triode V2, triode V3, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6
V2, triode V3, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6 constitute loop of voltage regulation, prevent current overload pair
Power adaptation damages, ensure that power supply adaptor can normal operation, the utility model by triode V1 and R1, so as to
Power supply adaptor is effectively protected, and by triode V2 and resistance R3, prevents current overload from causing to damage to power adaptation
It is bad, it ensure that power supply adaptor being capable of normal operation.
Operation principle：Ensure stable input current, prevent current overload, the damage of adapter is caused to be set when electric current is less than
During definite value, the bias current of V3 is provided by R3, when electric current is greater than or equal to setting value, the pressure drop on R3 increases, the pressure on R3
Drop and triode V3 knot pressures and pressure drop close to R4, then start to limit V3 by electric current, thus current limit is existed
Certain level, triode V1 and the resistance R1 composition current circuits with metering function, are fitted so as to be effectively protected power supply
Orchestration, triode V2, triode V3, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6 constitute loop of voltage regulation, prevent
Only current overload damages power adaptation, ensure that power supply adaptor being capable of normal operation.
The preferable specific embodiment of the above, only the utility model, but the scope of protection of the utility model is not
This is confined to, in the technical scope that any one skilled in the art discloses in the utility model, according to this practicality
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (6)
1. a kind of power supply adaptor input current protects integrated circuit, including triode V1, which is characterized in that the triode V1
Collector be connected with one end of resistance R1, the anode of input terminal U0, one end of resistance R3, one end of resistance R4, resistance R5
One end and the anode of output terminal U1, the base stage of the triode V1 are connected with the other end of resistance R1 and the anode of diode D, institute
The cathode for stating diode D is connected with the cathode of input terminal U0 and one end of resistance R2, and the other end of the resistance R2 is connected with defeated
The cathode of outlet U1 and the emitter of triode V1, and the other end ground connection of resistance R2；
The other end of the resistance R3 is connected with the collector of triode V2, and the emitter of the triode V2 is connected with capacitance C
One end, the base stage of the triode V2 is connected with the other end of resistance R4 and the collector of triode V3, the triode V3
Base stage be connected with the other end of resistance R5 and one end of resistance R6, the other end ground connection of the capacitance C, the triode V3's
Emitter is connected with the other end of resistance R6 and the cathode of output terminal U1, and the emitter ground connection of triode V3.
2. a kind of power supply adaptor input current protection integrated circuit according to claim 1, which is characterized in that described defeated
The input voltage for entering to hold the anode of U0 is AC 220 V.
A kind of 3. power supply adaptor input current protection integrated circuit according to claim 1, which is characterized in that the electricity
The resistance value for hindering R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6 is followed successively by 1K Ω, 1K Ω, 800 Ω, 600 Ω, 400
Ω and 200 Ω.
4. a kind of power supply adaptor input current protection integrated circuit according to claim 1, which is characterized in that described two
The model D71N4003 of pole pipe D.
5. a kind of power supply adaptor input current protection integrated circuit according to claim 1, which is characterized in that described three
The model of pole pipe V1, triode V2 and triode V3 are 1N5551.
A kind of 6. power supply adaptor input current protection integrated circuit according to claim 1, which is characterized in that the electricity
The capacitance for holding C is 220uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721756796.9U CN207530701U (en) | 2017-12-15 | 2017-12-15 | A kind of power supply adaptor input current protects integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721756796.9U CN207530701U (en) | 2017-12-15 | 2017-12-15 | A kind of power supply adaptor input current protects integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207530701U true CN207530701U (en) | 2018-06-22 |
Family
ID=62579327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721756796.9U Expired - Fee Related CN207530701U (en) | 2017-12-15 | 2017-12-15 | A kind of power supply adaptor input current protects integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207530701U (en) |
-
2017
- 2017-12-15 CN CN201721756796.9U patent/CN207530701U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180622 Termination date: 20181215 |