CN202334339U - Low-power power adapter - Google Patents
Low-power power adapter Download PDFInfo
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- CN202334339U CN202334339U CN2011204572302U CN201120457230U CN202334339U CN 202334339 U CN202334339 U CN 202334339U CN 2011204572302 U CN2011204572302 U CN 2011204572302U CN 201120457230 U CN201120457230 U CN 201120457230U CN 202334339 U CN202334339 U CN 202334339U
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Abstract
The utility model discloses a low-power power adapter which comprises an AC input terminal L, an AC input terminal N, a fuse F1, a primary rectifying circuit unit, a primary filtering circuit unit, an inverter circuit unit, a secondary rectifying and filtering circuit unit, a DC output terminal V+ and a DC output terminal V-. The primary filtering circuit unit is provided with a capacitor C1, a capacitor C2, an inductor L1, an inductor L2 and a resistor R1; the inverter circuit unit is provided with resistors R2 to R10, capacitors C3 to C5, a capacitor CY1, a diode D5, a diode D6, a diode D8, a transformer T1 and a chip U1; and the secondary rectifying and filtering circuit unit comprises a resistor C6, a resistor C7, a resistor C8, a resistor R11, a resistor R12, an inductor L3 and a diode D 7. Compared with the prior art, the low-power power adapter has the characteristics of less elements, low cost, miniaturization and light weight.
Description
Technical field
The utility model relates to field of power supplies, particularly relates to a kind of small power electric source adapter.
Background technology
Along with the continuous development and the customer requirements of science and technology improves day by day, electronic equipment is just towards miniaturization, small-power development, and therefore, miniaturization, light-weighted electronic equipment power source adapter have also acquired 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, just generally need to use Y electric capacity can reach requirement.The components and parts that sort circuit uses are more, make power supply adaptor can not adapt to miniaturization and light-weighted requirement, and because components and parts are more, the cost of power supply adaptor is also higher, can not adapt to energy conservation and environment protection.
Therefore, to the problem that exists in the prior art, needing badly provides a kind of small power electric source adapter, this small power electric source adapter to have that components and parts are few, cost is low, has miniaturization, light-weighted characteristics.
Summary of the invention
The purpose of the utility model is to avoid weak point of the prior art and a kind of small power electric source adapter is provided, and these small power electric source adapter institute use components and parts are few, and cost is lower, has miniaturization, light-weighted characteristics.
The purpose of the utility model realizes through following technical measures.
A kind of small power electric source adapter is provided with ac input end L, ac input end N, protective tube F1, elementary rectification circuit unit, elementary 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 set to rectifier bridge;
Said elementary 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, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C Y1, diode D5, diode D6, diode D8, transformer T1 and chip U1;
Said secondary commutation filter circuit unit comprises capacitor C 6, capacitor C 7, capacitor C 8, resistance R 11, resistance R 12, inductance L 3 and diode D7;
Said protective tube F1 one end is connected with ac input end L; The protective tube F1 other end is connected with rectifier bridge the 1st pin; Ac input end N 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, capacitor C 4 one ends, capacitor C Y1 one end 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 are connected with resistance R 3 one ends, and resistance R 3 other ends, capacitor C 5 one ends, diode D6 negative pole are connected with the vdd terminal of chip U1;
Resistance R 6 one ends are connected with diode D6 is anodal, and resistance R 6 other ends, resistance R 7 one ends, resistance R 8 one ends are connected with transformer T1 the 5th pin, and the 4th pin of the other end of capacitor C 5, transformer T1 connects power supply ground;
The negative pole of resistance R 7 other ends, resistance R 8 other ends, resistance R 9 one ends, diode D8 is connected with the INV of chip U1 end; Capacitor C 3 one ends are connected capacitor C 3 other ends, resistance R 9 other ends, diode D8 positive terminal, resistance R 10 1 termination power ground with the COMP end of chip U1;
Resistance R 10 other ends are connected the GND1 end of chip U1, GND2 termination power ground with the CS end of chip U1;
Resistance R 5 one ends are connected with an end of capacitor C 4, and resistance R 4 other ends, resistance R 5 other ends are connected with diode D5 negative pole, and the Drain1 end of diode D5 positive pole, transformer T1 the 3rd pin, chip U1 is connected with the Drain2 end of chip U1;
Transformer T1 the 10th pin, resistance R 11 1 ends are connected with the positive pole of diode D7, and resistance R 11 other ends are connected with capacitor C 6 one ends;
Capacitor C 6 other ends, capacitor C 7 positive poles, diode D7 negative pole and be connected with inductance L 3 one ends; Inductance L 3 other ends are connected with capacitor C 8 positive poles, resistance R 12 1 ends, dc output end V+, and transformer T1 the 6th pin, the capacitor C Y1 other end, capacitor C 7 negative poles, capacitor C 8 negative poles, resistance R 12 other ends are connected with dc output end V-.
The model of said chip U1 is OB2535.
The resistance value of above-mentioned protective tube F1 is set to 10 Europe, rated power is 1W.
The model of above-mentioned transformer T1 is EE16.
The model of above-mentioned diode D5 is FR107, and the model of said diode D6 is FR103, and the model of said diode D8 is IN4148.
Above-mentioned capacitor C 1 is set to 4.7 microfarads, and said electric capacity capacitor C 2 is set to 4.7 microfarads, and said inductance L 1 is set to 1 milihenry, and said inductance L 2 is set to 6.8 milihenries, and said resistance R 1 is set to 4.7 kilo-ohms.
Above-mentioned resistance R 2 is set to 1 megaohm, and said resistance R 3 is set to 1 megaohm, and said resistance R 4 is set to 200 kilo-ohms; Said resistance R 5 is set to 200 Europe; Said resistance R 6 is set to 10 Europe, and said resistance R 7 is set to 3 kilo-ohms, and said resistance R 8 is set to 24.9 kilo-ohms; Said resistance R 9 is set to 3 kilo-ohms, and said resistance R 10 is set to 2 Europe.
Above-mentioned capacitor C 3 is set to 1 microfarad, and said capacitor C 4 is set to 2.2 nanofarads, and said capacitor C 5 is set to 10 microfarads, and said capacitor C Y1 is set to 1 nanofarad.
Above-mentioned capacitor C 6 is set to 1 nanofarad, and said capacitor C 7 is set to 680 microfarads, and said capacitor C 8 is set to 220 microfarads.
Above-mentioned resistance R 11 is set to 47 Europe, and said resistance R 12 is set to 1 kilo-ohm.
The small power electric source adapter of the utility model compared with prior art, has the few low characteristics of cost of components and parts, has miniaturization, light-weighted characteristics.
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 small power electric source adapter of the utility model.
Embodiment
In conjunction with following examples the utility model is described further.
embodiment 1.
A kind of small power electric source adapter; As shown in Figure 1, be provided with ac input end L, ac input end N, protective tube F1, elementary rectification circuit unit, elementary 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 set to rectifier bridge.Elementary 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, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C Y1, diode D5, diode D6, diode D8, transformer T1 and chip U1.Secondary commutation filter circuit unit comprises capacitor C 6, capacitor C 7, capacitor C 8, resistance R 11, resistance R 12, inductance L 3 and diode D7.
Protective tube F1 one end is connected with ac input end L; The protective tube F1 other end is connected with rectifier bridge the 1st pin; Ac input end N 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, capacitor C 4 one ends, capacitor C Y1 one end 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 are connected with resistance R 3 one ends, and resistance R 3 other ends, capacitor C 5 one ends, diode D6 negative pole are connected with the vdd terminal of chip U1.
Resistance R 6 one ends are connected with diode D6 is anodal, and resistance R 6 other ends, resistance R 7 one ends, resistance R 8 one ends are connected with transformer T1 the 5th pin, and the 4th pin of the other end of capacitor C 5, transformer T1 connects power supply ground.
The negative pole of resistance R 7 other ends, resistance R 8 other ends, resistance R 9 one ends, diode D8 is connected with the INV of chip U1 end; Capacitor C 3 one ends are connected capacitor C 3 other ends, resistance R 9 other ends, diode D8 positive terminal, resistance R 10 1 termination power ground with the COMP end of chip U1.
Resistance R 10 other ends are connected the GND1 end of chip U1, GND2 termination power ground with the CS end of chip U1.
Resistance R 5 one ends are connected with an end of capacitor C 4, and resistance R 4 other ends, resistance R 5 other ends are connected with diode D5 negative pole, and the Drain1 end of diode D5 positive pole, transformer T1 the 3rd pin, chip U1 is connected with the Drain2 end of chip U1.
Transformer T1 the 10th pin, resistance R 11 1 ends are connected with the positive pole of diode D7, and resistance R 11 other ends are connected with capacitor C 6 one ends.
Capacitor C 6 other ends, capacitor C 7 positive poles, diode D7 negative pole and be connected with inductance L 3 one ends; Inductance L 3 other ends are connected with capacitor C 8 positive poles, resistance R 12 1 ends, dc output end V+, and transformer T1 the 6th pin, the capacitor C Y1 other end, capacitor C 7 negative poles, capacitor C 8 negative poles, resistance R 12 other ends are connected with dc output end V-.
The model of chip U1 is OB2535.The resistance value of protective tube F1 is set to 10 Europe, rated power is 1W.
This small power electric source adapter 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 OB2535 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.
embodiment 2.
A kind of small power electric source adapter, other structure is identical with embodiment 1, also has following technical characterictic:
The model of transformer T1 is EE16.The model of diode D5 is FR107, and the model of diode D6 is FR103, and the model of diode D8 is IN4148.
Capacitor C 1 is set to 4.7 microfarads, and electric capacity capacitor C 2 is set to 4.7 microfarads, and inductance L 1 is set to 1 milihenry, and inductance L 2 is set to 6.8 milihenries, and resistance R 1 is set to 4.7 kilo-ohms.
Resistance R 2 is set to 1 megaohm, and resistance R 3 is set to 1 megaohm, and resistance R 4 is set to 200 kilo-ohms; Resistance R 5 is set to 200 Europe, and resistance R 6 is set to 10 Europe, and resistance R 7 is set to 3 kilo-ohms; Resistance R 8 is set to 24.9 kilo-ohms, and resistance R 9 is set to 3 kilo-ohms, and resistance R 10 is set to 2 Europe.
Capacitor C 3 is set to 1 microfarad, and capacitor C 4 is set to 2.2 nanofarads, and capacitor C 5 is set to 10 microfarads, and capacitor C Y1 is set to 1 nanofarad.
Capacitor C 6 is set to 1 nanofarad, and capacitor C 7 is set to 680 microfarads, and capacitor C 8 is set to 220 microfarads.
Resistance R 11 is set to 47 Europe, and resistance R 12 is set to 1 kilo-ohm.
This small power electric source adapter 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 OB2535 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.
This small power electric source adapter power output is 6W/0.75A.
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 (10)
1. a small power electric source adapter is characterized in that: be provided with ac input end L, ac input end N, protective tube F1, elementary rectification circuit unit, elementary 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 set to rectifier bridge;
Said elementary 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, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C Y1, diode D5, diode D6, diode D8, transformer T1 and chip U1;
Said secondary commutation filter circuit unit comprises capacitor C 6, capacitor C 7, capacitor C 8, resistance R 11, resistance R 12, inductance L 3 and diode D7;
Said protective tube F1 one end is connected with ac input end L; The protective tube F1 other end is connected with rectifier bridge the 1st pin; Ac input end N 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, capacitor C 4 one ends, capacitor C Y1 one end 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 are connected with resistance R 3 one ends, and resistance R 3 other ends, capacitor C 5 one ends, diode D6 negative pole are connected with the vdd terminal of chip U1;
Resistance R 6 one ends are connected with diode D6 is anodal, and resistance R 6 other ends, resistance R 7 one ends, resistance R 8 one ends are connected with transformer T1 the 5th pin, and the 4th pin of the other end of capacitor C 5, transformer T1 connects power supply ground;
The negative pole of resistance R 7 other ends, resistance R 8 other ends, resistance R 9 one ends, diode D8 is connected with the INV of chip U1 end; Capacitor C 3 one ends are connected capacitor C 3 other ends, resistance R 9 other ends, diode D8 positive terminal, resistance R 10 1 termination power ground with the COMP end of chip U1;
Resistance R 10 other ends are connected the GND1 end of chip U1, GND2 termination power ground with the CS end of chip U1;
Resistance R 5 one ends are connected with an end of capacitor C 4, and resistance R 4 other ends, resistance R 5 other ends are connected with diode D5 negative pole, and the Drain1 end of diode D5 positive pole, transformer T1 the 3rd pin, chip U1 is connected with the Drain2 end of chip U1;
Transformer T1 the 10th pin, resistance R 11 1 ends are connected with the positive pole of diode D7, and resistance R 11 other ends are connected with capacitor C 6 one ends;
Capacitor C 6 other ends, capacitor C 7 positive poles, diode D7 negative pole and be connected with inductance L 3 one ends; Inductance L 3 other ends are connected with capacitor C 8 positive poles, resistance R 12 1 ends, dc output end V+, and transformer T1 the 6th pin, the capacitor C Y1 other end, capacitor C 7 negative poles, capacitor C 8 negative poles, resistance R 12 other ends are connected with dc output end V-.
2. small power electric source adapter according to claim 1 is characterized in that: the model of said chip U1 is OB2535.
3. small power electric source adapter according to claim 1 is characterized in that: the resistance value of said protective tube F1 is set to 10 Europe, rated power is 1W.
4. according to claim 1 or 2 or 3 described small power electric source adapters, it is characterized in that: the model of said transformer T1 is EE16.
5. small power electric source adapter according to claim 4 is characterized in that: the model of said diode D5 is FR107, and the model of said diode D6 is FR103, and the model of said diode D8 is IN4148.
6. small power electric source adapter according to claim 5; It is characterized in that: said capacitor C 1 is set to 4.7 microfarads, and said electric capacity capacitor C 2 is set to 4.7 microfarads, and said inductance L 1 is set to 1 milihenry; Said inductance L 2 is set to 6.8 milihenries, and said resistance R 1 is set to 4.7 kilo-ohms.
7. small power electric source adapter according to claim 6 is characterized in that: said resistance R 2 is set to 1 megaohm, and said resistance R 3 is set to 1 megaohm; Said resistance R 4 is set to 200 kilo-ohms, and said resistance R 5 is set to 200 Europe, and said resistance R 6 is set to 10 Europe; Said resistance R 7 is set to 3 kilo-ohms; Said resistance R 8 is set to 24.9 kilo-ohms, and said resistance R 9 is set to 3 kilo-ohms, and said resistance R 10 is set to 2 Europe.
8. small power electric source adapter according to claim 7 is characterized in that: said capacitor C 3 is set to 1 microfarad, and said capacitor C 4 is set to 2.2 nanofarads, and said capacitor C 5 is set to 10 microfarads, and said capacitor C Y1 is set to 1 nanofarad.
9. small power electric source adapter according to claim 8 is characterized in that: said capacitor C 6 is set to 1 nanofarad, and said capacitor C 7 is set to 680 microfarads, and said capacitor C 8 is set to 220 microfarads.
10. small power electric source adapter according to claim 9 is characterized in that: said resistance R 11 is set to 47 Europe, and said resistance R 12 is set to 1 kilo-ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204572302U CN202334339U (en) | 2011-11-17 | 2011-11-17 | Low-power power adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204572302U CN202334339U (en) | 2011-11-17 | 2011-11-17 | Low-power power adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334339U true CN202334339U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204572302U Expired - Fee Related CN202334339U (en) | 2011-11-17 | 2011-11-17 | Low-power power adapter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334339U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767262A (en) * | 2015-03-30 | 2015-07-08 | 深圳市倍斯特电源有限公司 | Portable power source and charging circuit thereof |
| CN104852612A (en) * | 2015-05-26 | 2015-08-19 | 中国神华能源股份有限公司 | Switching power supply based on UC3842 |
-
2011
- 2011-11-17 CN CN2011204572302U patent/CN202334339U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767262A (en) * | 2015-03-30 | 2015-07-08 | 深圳市倍斯特电源有限公司 | Portable power source and charging circuit thereof |
| CN104852612A (en) * | 2015-05-26 | 2015-08-19 | 中国神华能源股份有限公司 | Switching power supply based on UC3842 |
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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: 20120711 Termination date: 20181117 |