CN202143161U - Wide voltage power supply circuit - Google Patents
Wide voltage power supply circuit Download PDFInfo
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- CN202143161U CN202143161U CN201120119001U CN201120119001U CN202143161U CN 202143161 U CN202143161 U CN 202143161U CN 201120119001 U CN201120119001 U CN 201120119001U CN 201120119001 U CN201120119001 U CN 201120119001U CN 202143161 U CN202143161 U CN 202143161U
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Abstract
A wide voltage power supply circuit is characterized in that the circuit is formed by connecting a pulse width reactive circuit, a sampling and adjusting circuit, a switch power supply module N502, an over-current and over-voltage protection circuit, and an peripheral circuit of the switch power supply module; the pulse width reactive circuit (3) is composed of an optoelectronic coupler (N501), a resistor (R511), a diode (VD517) and a capacitor (C525); the sampling and adjusting circuit is composed of a resistor (R514) and a capacitor (C526); the over-current and over-voltage protection circuit (2) is composed of a voltage-stabilizing diode (VD519), resistors (R512, R513) and a capacitor (C522); the peripheral circuit of the switch power supply module is composed of a first capacitor (C523), a second capacitor (C524), a third capacitor (C520) and a resistor (R527). The wide voltage power supply circuit has advantages of high reliability, low consumption, low manufacturing cost and high power supply utilization rate. Moreover, the problems of the prior circuit that too many electronic components exist in a circuit, the electric energy loss is large, the production labor cost is high, and the adaptability of the working bandwidth is not large enough can be solved.
Description
Technical field
The utility model relates to field of television, relates in particular to the wide voltage supply circuit in the CRT television set.
Background technology
Generally between AC130V-260V, existing C RT television set Switching Power Supply generally contains the electronic device more than 50 to 100 to traditional CRT television set Switching Power Supply operate as normal maximum magnitude, as everybody knows; Too much not only the loss electric energy is serious for electronic component in the circuit; Also on degree of holding necessarily, increase production and processing man-hour, not only wasted human cost. but also do not meet the energy-conservation requirement that country advocates, moreover; Too much electric device also can increase the failure rate of machine in the circuit; Product reliability is reduced, the voltage stabilized range of circuit is affected, reduced voltage width; The area that this influence is owed steady at some line voltages is especially obvious.
In order to respond the call of national energy-saving and emission-reduction, improve performance of products and reliability, be necessary the circuit of traditional CRT television set Switching Power Supply is simplified improvement.
The utility model content:
In order to reach above-mentioned purpose of design, a kind of wide voltage supply circuit of the utility model, this circuit has the integrated level height; Peripheral component is few, the characteristics that the simple productive rate of circuit is high, and input voltage is between 90VAC-260VAC; Scope than traditional C RT television set Switching Power Supply has been widened 40V, thereby has improved reliability of products widely, can adapt to the different voltages with different power grid environment; Unstable to some line voltages, there is very obvious superiority in the low area of waiting of voltage.Its technical scheme is following:
A kind of wide voltage supply circuit; Peripheral circuit by pulsewidth feedback circuit, sampling adjustment circuit, switch power module N502, overcurrent-overvoltage protecting circuit and switch power module connects into, and said pulsewidth feedback circuit is made up of photoelectrical coupler N501 and resistance, diode, electric capacity; Said sampling adjustment circuit is made up of resistance and electric capacity; Said overcurrent-overvoltage protecting circuit is made up of zener diode and resistance, electric capacity; The peripheral circuit of said switch power module is made up of 3 electric capacity (calling the 1st, the 2nd, the 3rd electric capacity in the following text) and a resistance.
Connect switch MOS FET drain electrode in said switch module N502 the 1st pin; Connect switch MOS FET source electrode in the 2nd pin ground connection, the 3rd pin is N502 internal control module power supply input, and the 4th pin is N502 internal control module sampling adjustment end; The 5th pin pulsewidth feedback input end, the 6th pin is the overvoltage protection input pin.
Said pulsewidth feedback circuit, the emitter of the photoelectrical coupler N501 in it is divided into two-way behind resistance, and one the tunnel connects 5 pin of switch power module, and another road is connected with an isopotential point after connecing electric capacity; Collector electrode one tunnel connects 3 pin of switch power module; Another road connects the negative pole of diode; The positive pole of diode connects the termination in succession, and during use, this connects the termination and is connected with the feedback winding of switching mode power supply transformer; The input of photoelectrical coupler N501 respectively connects the termination, during use with connect secondary sample circuit.
An end is connected with 4 pin of switch power module behind the said sampling adjustment circuit, the resistance in it and electric capacity parallel connection, and the other end is connected with aforementioned isopotential point.
Said overcurrent-overvoltage protecting circuit, the positive pole of the zener diode in it is connected with the positive pole of aforementioned diodes, negative pole behind dropping resistor one the tunnel connect switch power module 6 pin, another road is connected with aforementioned isopotential point behind resistance, this resistance is connected to shunt capacitance.
The peripheral circuit of said switch power module; One termination of said resistance connects the termination, and this connection termination connects the output of current rectifying and wave filtering circuit during use, and an end of the other end of this resistance and the 1st, the 2nd electric capacity is connected; And node is connected with 3 pin of said switch power module; The 3rd electric capacity connects 1 pin of said switch power module, and node and connects the termination in succession and be connected, during use; This connects the termination and is connected the aforesaid isopotential point of another termination of the 1st, the 2nd, the 3rd electric capacity with the elementary winding of switching mode power supply transformer.
Description of drawings:
1, Fig. 1 is the circuit block diagram of the said wide voltage supply circuit of the utility model;
2, Fig. 2 is the circuit diagram of the said wide voltage supply circuit of the utility model;
The advantage of the described wide-voltage switch power circuit of the utility model is:
Because said circuit has adopted high performance switch power module; And the electronic device of built-up circuit is few; So have reliability height, consume is low, cost of manufacture is low, the power utilization rate is high advantage, solved prior art circuits exist electronic component in the circuit too much not only the loss electric energy serious, produce labour's height, problem that work bandwidth adaptability is big inadequately.
Embodiment:
Below in conjunction with accompanying drawing, a kind ofly be used for CRT field of television wide-voltage switch power circuit of new generation and further describe the utility model is described:
With reference to figure 1,2; Shown in figure; Said wide voltage supply circuit is connected into by the peripheral circuit 4 of pulsewidth feedback circuit 3, sampling adjustment circuit 1, switch power module N502, overcurrent-overvoltage protecting circuit 2 and switch power module, and said pulsewidth feedback circuit 3 is made up of photoelectrical coupler N501 and resistance R 511, diode VD517, capacitor C 525; Said sampling adjustment circuit is made up of resistance R 514 and capacitor C 526; Said overcurrent-overvoltage protecting circuit 2 is made up of zener diode VD519 and resistance R 512, R513, capacitor C 522; The peripheral circuit of said switch power module is made up of 3 capacitor C 523 (the 1st electric capacity), C524 (the 2nd electric capacity), C520 (the 3rd electric capacity) and resistance R 527.
Said pulsewidth feedback circuit 3, emitter of said photoelectrical coupler N501 is divided into two-way in it after resistance R 511, and one the tunnel connects 5 pin of switch power module, and another road is connected with an isopotential point a after connecing electric capacity; Its collector electrode one tunnel connects 3 pin of switch power module; Another road connects the negative pole of diode VD517, and the positive pole of diode meets a connection termination b, during use; This connects the termination and is connected with the feedback winding of switching mode power supply transformer, and the input of photoelectrical coupler N501 respectively connects termination (c, d).
Said sampling adjustment circuit 1, said resistance R 514 is connected with 4 pin of switch power module with capacitor C 526 parallel connection backs one end in it, and the other end is connected with aforesaid isopotential point a.
Said overcurrent-overvoltage protecting circuit 2; Positive pole of said zener diode VD519 is connected with the positive pole of aforementioned diodes VD517 in it; Negative pole behind dropping resistor R512 one the tunnel connect switch power module 6 pin; Another road is connected with aforesaid isopotential point a after resistance R 513, and this resistance is connected to shunt capacitance C522.
In the peripheral circuit 4 of said switch power module; One termination of said resistance R 527 connects termination f; This connection termination connects the output of current rectifying and wave filtering circuit during use, and the end of the other end of said resistance R 527 and the 1st, the 2nd capacitor C 523, C524 is connected, and node is connected with 3 pin of said switch power module; The 3rd capacitor C 527 connects 1 pin of said switch power module; Node and one meets termination e in succession and is connected, and should connect termination during use and be connected with the elementary winding of switching mode power supply transformer, the aforesaid isopotential point a of another termination of the 1st, the 2nd, the 3rd capacitor C 523, C524, C527.
Claims (5)
1. a wide voltage supply circuit is characterized in that being connected into by the peripheral circuit of pulsewidth feedback circuit, sampling adjustment circuit, switch power module N502, overcurrent-overvoltage protecting circuit and switch power module; Said pulsewidth feedback circuit (3) is made up of photoelectrical coupler N501 and resistance (R511), diode (VD517), electric capacity (C525); Said sampling adjustment circuit is made up of resistance (R514) and electric capacity (C526); Said overcurrent-overvoltage protecting circuit (2) is made up of zener diode (VD519) and resistance (R512, R513), electric capacity (C522); The peripheral circuit of said switch power module is made up of the 1st electric capacity (C523), the 2nd electric capacity (C524), the 3rd electric capacity (C520) and resistance (R527).
2. wide voltage supply circuit according to claim 1; It is characterized in that: said pulsewidth feedback circuit (3); Emitter of said photoelectrical coupler N501 is divided into two-way in it behind resistance (R511), and one the tunnel connects 5 pin of switch power module, and another road is connected with an isopotential point (a) after connecing electric capacity; Its collector electrode one tunnel connects 3 pin of switch power module, and another road connects the negative pole of diode (VD517), and the positive pole of diode connects a connection termination (b), and the input of photoelectrical coupler N501 respectively connects termination (c, d).
3. wide voltage supply circuit according to claim 1 and 2; It is characterized in that: said sampling adjustment circuit (1); Said resistance (R514) is connected with 4 pin of switch power module with electric capacity (C526) parallel connection back one end in it, and the other end is connected with aforementioned isopotential point (a).
4. wide voltage supply circuit according to claim 1 and 2; It is characterized in that: said overcurrent-overvoltage protecting circuit (2); Positive pole of said zener diode (VD519) is connected with the positive pole of aforementioned diodes (VD517) in it; Negative pole connects 6 pin of switch power module through dropping resistor (R512) Hou Yilu, and another road is connected with aforementioned isopotential point (a) behind resistance (R513), and this resistance is connected to shunt capacitance (C522).
5. wide voltage supply circuit according to claim 1 and 2; It is characterized in that: in the peripheral circuit of said switch power module (4); One termination of said resistance (R527) connects termination (f); One end of the other end and the 1st of said resistance (R527), the 2nd electric capacity (C523, C524) is connected, and node is connected with 3 pin of said switch power module, and the 3rd electric capacity (C527) connects 1 pin of said switch power module; Node and one connects termination (e) in succession and is connected, the aforementioned isopotential point of another termination (a) of the 1st, the 2nd, the 3rd electric capacity (C523, C524, C527).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120119001U CN202143161U (en) | 2011-04-21 | 2011-04-21 | Wide voltage power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120119001U CN202143161U (en) | 2011-04-21 | 2011-04-21 | Wide voltage power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202143161U true CN202143161U (en) | 2012-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120119001U Expired - Fee Related CN202143161U (en) | 2011-04-21 | 2011-04-21 | Wide voltage power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202143161U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454172A (en) * | 2016-12-22 | 2017-02-22 | 深圳Tcl数字技术有限公司 | Power supply circuit and TV set |
-
2011
- 2011-04-21 CN CN201120119001U patent/CN202143161U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454172A (en) * | 2016-12-22 | 2017-02-22 | 深圳Tcl数字技术有限公司 | Power supply circuit and TV set |
| CN106454172B (en) * | 2016-12-22 | 2019-11-05 | 深圳Tcl数字技术有限公司 | Power circuit and television set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 528234, Guangdong, Foshan City, Nanhai District, Songgang pine summer Industrial Park Road Foundation Patentee after: Guangdong shengzhiyuan digital electronics Limited by Share Ltd Address before: 528000, Guangdong, Foshan City, Nanhai District, Songgang pine summer Industrial Park Road Foundation Patentee before: Guangdong Shengzhiyuan Digital Electronics Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20140421 |