CN202103579U - Power supply adapter circuit - Google Patents
Power supply adapter circuit Download PDFInfo
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- CN202103579U CN202103579U CN2011202282752U CN201120228275U CN202103579U CN 202103579 U CN202103579 U CN 202103579U CN 2011202282752 U CN2011202282752 U CN 2011202282752U CN 201120228275 U CN201120228275 U CN 201120228275U CN 202103579 U CN202103579 U CN 202103579U
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Abstract
A power supply adapter circuit comprises an AC input end L, a AC input end N, a protective tube F1, a pressure-sensitive resistor VZ1, a primary rectification circuit unit, a filter circuit unit, an inversion circuit unit, a secondary rectification filter circuit unit, a DC output end V+ and a DC output end V(. The primary rectification circuit unit is provided with a rectifier bridge, the filter circuit unit is provided with a capacitor C1, a capacitor C2, an inductor L2, an inductor L2, and a resistor R1, and the secondary rectification filter circuit unit comprises a capacitor C6, a capacitor C7, a capacitor C8, a resistor R14, a resistor R15, an inductor L3, a diode D7, and a voltage stabilization diode ZD1. Compared with the prior art, the voltage stabilization constant current and EMC requirements can be satisfied with less components, a power supply adapter made with the circuit is low in cost, and the characteristics of miniaturization and light weight can be realized.
Description
Technical field
The utility model relates to field of power supplies, particularly relates to a kind of power supply adaptor circuit.
Background technology
Because the continuous development and the customer requirements of technology improve day by day, the miniaturization of electronic equipment forward, lightweight development, therefore, miniaturization, light-weighted electronic equipment charger have also obtained user's favor.
In the prior art, general power supply adaptor is to adopt secondary feedback, several resistance, electric capacity that secondary feedback generally need use TL431, optocoupler and mate with TL431, optocoupler; For through the EMI test, general through using Y electric capacity to realize.The components and parts that the sort circuit design causes circuit to use are many, and power supply adaptor can not be realized miniaturization and light-weighted requirement, and has increased cost.
Therefore, to the problem that exists in the prior art, needing badly provides a kind of power supply adaptor circuit, this power supply adaptor circuit to possess to use components and parts few, and the charger that uses this circuit to process is saved cost, can realize characteristics such as miniaturization, lightweight.
Summary of the invention
The purpose of the utility model is to avoid weak point of the prior art and a kind of power supply adaptor circuit is provided, and this power supply adaptor circuit uses components and parts few, and the charger that uses this circuit to process is saved cost, can realize miniaturization, lightweight.
The purpose of the utility model realizes through following technical measures.
A kind of power supply adaptor circuit is provided, comprises ac input end L, ac input end N, protective tube F1, piezo-resistance VZ1, elementary rectification circuit unit, filter circuit unit, inverter circuit unit, secondary commutation filter circuit unit, dc output end V+ and dc output end V-; Said elementary rectification circuit unit is provided with rectifier bridge; Said filter circuit unit is provided with capacitor C 1, capacitor C 2, inductance L 1, inductance L 2 and resistance R 1; Said inverter circuit unit is provided with resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, capacitor C 3, capacitor C 4, capacitor C 5, diode D5, diode D6, triode Q1, transformer T1 and chip U1; Said secondary commutation filter circuit unit comprises capacitor C 6, capacitor C 7, capacitor C 8, resistance R 14, resistance R 15, inductance L 3, diode D7 and zener diode ZD1; Said protective tube F1 one end is connected with ac input end L; The end of the protective tube F1 other end, piezo-resistance VZ1 is connected with rectifier bridge the 1st pin; The other end of ac input end N, piezo-resistance VZ1 is connected with rectifier bridge the 3rd pin; Rectifier bridge the 2nd pin and inductance L 1 one ends, resistance R 1,1 anodal connection of capacitor C, rectifier bridge the 4th pin is connected with capacitor C 1 negative pole, inductance L 2 one ends; Inductance L 1 other end, capacitor C 2 positive poles, resistance R 1 other end, resistance R 2 one ends, resistance R 4 one ends, resistance R 5 one ends are connected with transformer T1 the 1st pin; Inductance L 2 other ends, capacitor C 2 negative poles connect power supply ground; Resistance R 2 other ends, resistance R 3 one ends are connected with resistance R 13 1 ends, and resistance R 3 other ends, capacitor C 5 one ends, resistance R 6 one ends are connected with the vdd terminal of chip U1; Resistance R 6 other ends are connected with diode D6 negative pole, and diode D6 positive pole, resistance R 7 one ends, resistance R 8 one ends, transformer T1 the 5th pin connect, and the 2nd pin of the other end of capacitor C 5, transformer T1 connects power supply ground; Resistance R 7 other ends, resistance R 8 other ends, resistance R 9 one ends are connected with the INV end of chip U1, and capacitor C 3 one ends are connected capacitor C 3 other ends, resistance R 9 other ends, resistance R 11 another termination power ground with the COMP end of chip U1; Resistance R 13 other ends, resistance R 10 1 ends are connected with the CS end of chip U1, and resistance R 10 other ends, resistance R 11 other ends are connected with the emitter of chip U1, the GND termination power ground of chip U1; Resistance R 4 other ends are connected with an end of capacitor C 4; Resistance R 5 other ends, capacitor C 4 other ends are connected with diode D5 negative pole; Diode D5 is anodal, transformer T1 the 3rd pin is connected with triode Q1 collector electrode; The base stage of triode Q1 is connected with resistance R 12 1 ends, and resistance R 12 other ends are connected with the GATE end of chip U1; Transformer T1 the 9th pin, capacitor C 6 one ends are connected with the positive pole of diode D7; Capacitor C 6 other ends are connected with electric capacity R14 one end; The electric capacity R14 other end, diode D7 negative pole, capacitor C 7 positive poles, voltage stabilizing didoe ZD1 negative pole are connected with inductance L 3 one ends; Inductance L 3 other ends are connected with capacitor C 8 positive poles, resistance R 5, dc output end V+, and transformer T1 the 6th pin, capacitor C 7 negative poles, voltage stabilizing didoe ZD1 positive pole, capacitor C 8 negative poles, resistance R 15 other ends are connected with dc output end V-.
The model of said chip U1 is OB2520.
The power supply adaptor circuit of the utility model comprises ac input end L, ac input end N, protective tube F1, piezo-resistance VZ1, elementary rectification circuit unit, filter circuit unit, inverter circuit unit, secondary commutation filter circuit unit, dc output end V+ and dc output end V-.The utility model compared with prior art possesses the requirement of using less components and parts can satisfy the EMI electromagnetic interference less, and the power supply adaptor cost that uses this power supply adaptor circuit to process is lower, can realize characteristics such as miniaturization, lightweight.
Description of drawings
Utilize accompanying drawing that the utility model is further specified, but the content in the accompanying drawing does not constitute any restriction to the utility model.
Fig. 1 is the circuit diagram of a kind of power supply adaptor circuit of the utility model.
Embodiment
In conjunction with following examples the utility model is described further.
embodiment 1.
A kind of power supply adaptor circuit; As shown in Figure 1, comprise ac input end L, ac input end N, protective tube F1, piezo-resistance VZ1, elementary rectification circuit unit, filter circuit unit, inverter circuit unit, secondary commutation filter circuit unit, dc output end V+ and dc output end V-.
Elementary rectification circuit unit is provided with rectifier bridge.
The filter circuit unit is provided with capacitor C 1, capacitor C 2, inductance L 1, inductance L 2 and resistance R 1.
The inverter circuit unit is provided with resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, capacitor C 3, capacitor C 4, capacitor C 5, diode D5, diode D6, triode Q1, transformer T1 and chip U1.
Secondary commutation filter circuit unit comprises capacitor C 6, capacitor C 7, capacitor C 8, resistance R 14, resistance R 15, inductance L 3, diode D7 and zener diode ZD1.
Protective tube F1 one end is connected with ac input end L; The end of the protective tube F1 other end, piezo-resistance VZ1 is connected with rectifier bridge the 1st pin; The other end of ac input end N, piezo-resistance VZ1 is connected with rectifier bridge the 3rd pin; Rectifier bridge the 2nd pin and inductance L 1 one ends, resistance R 1,1 anodal connection of capacitor C, rectifier bridge the 4th pin is connected with capacitor C 1 negative pole, inductance L 2 one ends.
Inductance L 1 other end, capacitor C 2 positive poles, resistance R 1 other end, resistance R 2 one ends, resistance R 4 one ends, resistance R 5 one ends are connected with transformer T1 the 1st pin.
Inductance L 2 other ends, capacitor C 2 negative poles connect power supply ground.
Resistance R 2 other ends, resistance R 3 one ends are connected with resistance R 13 1 ends, and resistance R 3 other ends, capacitor C 5 one ends, resistance R 6 one ends are connected with the vdd terminal of chip U1.
Resistance R 6 other ends are connected with diode D6 negative pole, and diode D6 positive pole, resistance R 7 one ends, resistance R 8 one ends, transformer T1 the 5th pin connect, and the 2nd pin of the other end of capacitor C 5, transformer T1 connects power supply ground.
Resistance R 7 other ends, resistance R 8 other ends, resistance R 9 one ends are connected with the INV end of chip U1, and capacitor C 3 one ends are connected capacitor C 3 other ends, resistance R 9 other ends, resistance R 11 another termination power ground with the COMP end of chip U1.
Resistance R 13 other ends, resistance R 10 1 ends are connected with the CS end of chip U1, and resistance R 10 other ends, resistance R 11 other ends are connected with the emitter of chip U1, the GND termination power ground of chip U1.
Resistance R 4 other ends are connected with an end of capacitor C 4; Resistance R 5 other ends, capacitor C 4 other ends are connected with diode D5 negative pole; Diode D5 is anodal, transformer T1 the 3rd pin is connected with triode Q1 collector electrode; The base stage of triode Q1 is connected with resistance R 12 1 ends, and resistance R 12 other ends are connected with the GATE end of chip U1.
Transformer T1 the 9th pin, capacitor C 6 one ends are connected with the positive pole of diode D7; Capacitor C 6 other ends are connected with electric capacity R14 one end; The electric capacity R14 other end, diode D7 negative pole, capacitor C 7 positive poles, voltage stabilizing didoe ZD1 negative pole are connected with inductance L 3 one ends; Inductance L 3 other ends are connected with capacitor C 8 positive poles, resistance R 5, dc output end V+, and transformer T1 the 6th pin, capacitor C 7 negative poles, voltage stabilizing didoe ZD1 positive pole, capacitor C 8 negative poles, resistance R 15 other ends are connected with dc output end V-.
Wherein, the model of U1 is OB2520.
This power supply adaptor circuit adopts elementary feedback adjustment technology, saved optocoupler in the prior art, TL431 and with the resistance capacitance of optocoupler, TL431 coupling; Through the particular design of transformer, need not use Y electric capacity can satisfy the EMI requirement; Use the chip U1 of OB2520 model, can realize copped wave and PWM control, direct current is become interchange, entire circuit uses components and parts few, and cost is lower.
It is few that the utility model possesses the components and parts of use, and the charger that uses this circuit to process is saved cost, can realize characteristics such as miniaturization, lightweight.
The power output of the utility model is 7.5V/300mA.
Should be noted that at last; Above embodiment only be used to explain the utility model technical scheme but not to the restriction of the utility model protection range; Although the utility model has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model, and do not break away from the essence and the scope of the utility model technical scheme.
Claims (2)
1. a power supply adaptor circuit is characterized in that: comprise ac input end L, ac input end N, protective tube F1, piezo-resistance VZ1, elementary rectification circuit unit, filter circuit unit, inverter circuit unit, secondary commutation filter circuit unit, dc output end V+ and dc output end V-; Said elementary rectification circuit unit is provided with rectifier bridge; Said filter circuit unit is provided with capacitor C 1, capacitor C 2, inductance L 1, inductance L 2 and resistance R 1; Said inverter circuit unit is provided with resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, capacitor C 3, capacitor C 4, capacitor C 5, diode D5, diode D6, triode Q1, transformer T1 and chip U1; Said secondary commutation filter circuit unit comprises capacitor C 6, capacitor C 7, capacitor C 8, resistance R 14, resistance R 15, inductance L 3, diode D7 and zener diode ZD1; Said protective tube F1 one end is connected with ac input end L; The end of the protective tube F1 other end, piezo-resistance VZ1 is connected with rectifier bridge the 1st pin; The other end of ac input end N, piezo-resistance VZ1 is connected with rectifier bridge the 3rd pin; Rectifier bridge the 2nd pin and inductance L 1 one ends, resistance R 1 one ends, 1 anodal connection of capacitor C, rectifier bridge the 4th pin is connected with capacitor C 1 negative pole, inductance L 2 one ends; Inductance L 1 other end, capacitor C 2 positive poles, resistance R 1 other end, resistance R 2 one ends, resistance R 4 one ends, resistance R 5 one ends are connected with transformer T1 the 1st pin; Inductance L 2 other ends, capacitor C 2 negative poles connect power supply ground; Resistance R 2 other ends, resistance R 3 one ends are connected with resistance R 13 1 ends, and resistance R 3 other ends, capacitor C 5 one ends, resistance R 6 one ends are connected with the vdd terminal of chip U1; Resistance R 6 other ends are connected with diode D6 negative pole, and diode D6 positive pole, resistance R 7 one ends, resistance R 8 one ends, transformer T1 the 5th pin connect, and the 2nd pin of the other end of capacitor C 5, transformer T1 connects power supply ground; Resistance R 7 other ends, resistance R 8 other ends, resistance R 9 one ends are connected with the INV end of chip U1, and capacitor C 3 one ends are connected capacitor C 3 other ends, resistance R 9 other ends, resistance R 11 1 termination power ground with the COMP end of chip U1; Resistance R 13 other ends, resistance R 10 1 ends are connected with the CS end of chip U1, and resistance R 10 other ends, resistance R 11 other ends are connected with the emitter of chip U1, the GND termination power ground of chip U1; Resistance R 4 other ends are connected with an end of capacitor C 4; Resistance R 5 other ends, capacitor C 4 other ends are connected with diode D5 negative pole; Diode D5 is anodal, transformer T1 the 3rd pin is connected with triode Q1 collector electrode; The base stage of triode Q1 is connected with resistance R 12 1 ends, and resistance R 12 other ends are connected with the GATE end of chip U1; Transformer T1 the 9th pin, capacitor C 6 one ends are connected with the positive pole of diode D7; Capacitor C 6 other ends are connected with electric capacity R14 one end; The electric capacity R14 other end, diode D7 negative pole, capacitor C 7 positive poles, voltage stabilizing didoe ZD1 negative pole are connected with inductance L 3 one ends; Inductance L 3 other ends are connected with capacitor C 8 positive poles, resistance R 5 one ends, dc output end V+, and transformer T1 the 6th pin, capacitor C 7 negative poles, voltage stabilizing didoe ZD1 positive pole, capacitor C 8 negative poles, resistance R 15 other ends are connected with dc output end V-.
2. a kind of power supply adaptor circuit according to claim 1 is characterized in that: the model of said chip U1 is OB2520.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202282752U CN202103579U (en) | 2011-06-30 | 2011-06-30 | Power supply adapter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202282752U CN202103579U (en) | 2011-06-30 | 2011-06-30 | Power supply adapter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202103579U true CN202103579U (en) | 2012-01-04 |
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ID=45389577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202282752U Expired - Fee Related CN202103579U (en) | 2011-06-30 | 2011-06-30 | Power supply adapter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202103579U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106510214A (en) * | 2016-11-29 | 2017-03-22 | 廖婕 | Intelligent comprehensive tea art table |
-
2011
- 2011-06-30 CN CN2011202282752U patent/CN202103579U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106510214A (en) * | 2016-11-29 | 2017-03-22 | 廖婕 | Intelligent comprehensive tea art table |
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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: 20120104 Termination date: 20190630 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |