CN2884414Y - Automatic starting circuit for power-supply of color plasma display - Google Patents
Automatic starting circuit for power-supply of color plasma display Download PDFInfo
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- CN2884414Y CN2884414Y CNU2006200782777U CN200620078277U CN2884414Y CN 2884414 Y CN2884414 Y CN 2884414Y CN U2006200782777 U CNU2006200782777 U CN U2006200782777U CN 200620078277 U CN200620078277 U CN 200620078277U CN 2884414 Y CN2884414 Y CN 2884414Y
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- power supply
- resistance
- effect transistor
- field effect
- plasma display
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Abstract
The utility model discloses a self-start circuit for a color plasma display power supply. The self-start circuit comprises a commutation diode, which is connected with the end of an additional winding of a transformer. The cathode of the commutation diode, the cathode of an output voltage regulator tube, and the source electrode of a field effect transistor are connected with one end of source electrode capacitance, and then extended to an output terminal. A drain electrode of the field effect transistor is connected with a divider resistance, and extends to a DC input terminal. The DC input terminal is connected with the cathode of a discharge diode, and the resistance lateral of a resistance and capacitance series circuit. The capacitance lateral of the resistance and capacitance series circuit are connected with the G electrode of the field effect transistor, the cathode of an input voltage regulator tube, and the ballast. The other end of the ballast is connected with the anodes of two voltage regulator tubes, the other end of the source electrode capacitance, and the other end of the additional winding. And they are put to earth together. The utility model self-start circuit for the power supply is characterized in that it obviously decreases the power consumption, and increases the power supply efficiency of the large-screen color plasma display.
Description
Technical field
The utility model relates to a kind of power circuit of colour plasma display, the self-start circuit in particularly a kind of colour plasma display switching power supply.
Background technology
Development along with multimedia technology digital information technology, be used to make the colour plasma display (PDP of high definition television machine, Plasma Display Panel) obtained in recent years developing rapidly, especially 40 to 60 inches large-sized solor plasma scopes have begun to come into the market.Large-sized solor plasma scope, particularly AC type colour plasma display AC-PDP have obtained to popularize faster owing to it has advantages such as type of drive is simple at present.But increasing of the increase of colour plasma display size and additional function increases considerably the power consumption of complete machine, so the switching power supply in the colour plasma display has to fully take into account this problem of efficient.How to improve the efficient of colour plasma display power supply, realize the function of " efficient, energy-conservation, green ", be important research project of TV technology always.
Self-start circuit in the colour plasma display switching power supply is the circuit of operating voltage to be provided for control integrated circuit and power switch driver circuit in startup and accessory power supply.Because the power of this part all input and output of circuit all belongs to loss, therefore under the condition that guarantees its all functions, should improve its efficient as far as possible, particularly under the situation of high input voltage, seem even more important, because when input is higher than direct current 20V, input voltage can not directly be powered to integrated circuit and power switch, but needs to adopt startup/auxiliary power circuit.
Power supply starts from complete off-mode, when power input is added on the power supply, will draw electric current from the input power source bus.For self-start circuit, need to consider its required function, and can be fit to whole power-supply system requirements of one's work.The general utility functions of self-start circuit are: 1) situation of power supply output short-circuit is in case end when getting back to operate as normal, make all functions of control/power switch circuit recover at once; 2) when being short-circuited, power supply will enter the pattern that restarts at interval, and in a single day short-circuit conditions disappears, and power supply just restarts; 3. during short circuit, enter complete off-mode, shutdown system then, power input also will be cut off, and closes when restarting power supply again.
When existing self-start circuit just starts at power supply, by direct-flow input end Vin by resistance R 1 to integrated circuit power supply, treat the power supply steady operation after, by auxiliary winding generation
Chip operating voltageVcc powers to integrated circuit, but starting current even also be so, has therefore increased the working loss of power supply all the time from the input of input current bus during the circuit steady operation.
Summary of the invention
The purpose of this utility model is to improve the inefficient defective of existing power supply self-start circuit, and a kind of power supply self-start circuit that reduces power consumption is provided, and this circuit has the characteristics of obvious raising large-sized solor plasma scope power-efficient.
For reaching above purpose, the utility model takes following technical scheme to be achieved:
A kind of self-start circuit of colour plasma display power supply, comprise the commutation diode that links to each other with auxiliary winding one end of transformer, the negative pole of the negative pole of described commutation diode and output voltage stabilivolt, the source electrode of field effect transistor and source capacitance one end are connected to output terminal, the drain electrode of field effect transistor connects divider resistance to direct-flow input end, the negative pole of direct-flow input end and discharge diode, the resistance side of resistor-capacitor series circuit links to each other, the G utmost point of the capacitive side of resistor-capacitor series circuit and field effect transistor, the negative pole of input voltage stabilivolt links to each other with voltage regulation resistance, the positive pole of the other end of voltage regulation resistance and two stabilivolts, the source capacitance other end, the auxiliary winding other end is connected to ground.
Compare with existing self-start circuit, the beneficial effects of the utility model are that it can not only reach the required function of circuit itself, also has the function that improves power work efficient.Self-start circuit of the present utility model is discrete a, high voltage, single start-up circuit, only works when just beginning to start, and turn-offs fully after the startup; The phenomenon if power supply is short-circuited, power supply enter complete off-mode, have only after the input of the shutoff power supply, could start once more.So both guarantee the trouble free service of power supply, also improved the efficient of system.
Description of drawings
Fig. 1 is a self-start circuit structural drawing of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, a kind of self-start circuit of colour plasma display power supply comprises transformer T's
AuxiliaryWinding N2, the commutation diode D1 that links to each other with auxiliary winding N2 one end, source S and capacitor C 2 one ends of the negative pole of the negative pole of described commutation diode D1 and stabilivolt D3, field effect transistor M1 (claiming power MOSFET tube again) are connected to output terminal Vcc, the drain D connecting resistance R2 of field effect transistor M1 is to direct-flow input end Vin, and direct current is defeated
Go into to hold Vin withThe negative pole of diode D2, the R1 of resistor-capacitor series circuit link to each other, the capacitor C 1 of resistor-capacitor series circuit links to each other with resistance R 3 with the negative pole of the G utmost point of field effect transistor M1, stabilivolt D4, and the positive pole of the other end of resistance R 3 and stabilivolt D3, D4, capacitor C 2 other ends, the auxiliary winding N2 other end are connected to ground.
Principle of work of the present utility model is, when power supply just starts, the input voltage of direct-flow input end Vin applies voltage for the G utmost point of field effect transistor M1 by resistance R 1, capacitor C 1 series circuit and resistance R 3, field effect transistor M1 conducting, input voltage provides voltage for the chip power supply pin by resistance R 2 through output terminal Vcc.After capacitor C 1 was full of electricity, the G pole tension of field effect transistor M1 dropped to 0V, and field effect transistor M1 ends, and chip is powered after commutation diode D1 rectification by auxiliary winding N1.When the situation of circuit generation excess current short circuit, the electric current of direct-flow input end Vin sharply increases, and gives the time of capacitor C 1 charging very short, field effect transistor M1 has little time conducting, like this, chip just can't obtain operating voltage from direct-flow input end Vin, thereby has just turn-offed whole power-supply system.Have only after the input of the shutoff power supply, capacitor C 1 is by diode D2 discharge, and this system could start once more.Stabilivolt D4 is used for stablizing the G pole tension of field effect transistor M1.Stabilivolt D3 is used for stablizing the output voltage V cc of chip operation.The former limit of transformer T winding N1 does not directly connect direct-flow input end Vin, but is connected with direct-flow input end indirectly by other circuit.
Claims (1)
1. the self-start circuit of a colour plasma display power supply, comprise the commutation diode (D1) that links to each other with auxiliary winding (N2) end of transformer (T), it is characterized in that, the negative pole of the negative pole of described commutation diode (D1) and stabilivolt (D3), the source electrode (S) of field effect transistor (M1) and electric capacity (C2) end are connected to output terminal (Vcc), drain electrode (D) connecting resistance (R2) of described field effect transistor (M1) is to direct-flow input end (Vin), the negative pole of direct-flow input end (Vin) and diode (D2), (R1) of resistor-capacitor series circuit links to each other, (G) utmost point of electric capacity of resistor-capacitor series circuit (C1) and field effect transistor (M1), the negative pole of stabilivolt (D4) links to each other with resistance (R3), the other end of resistance (R3) and stabilivolt (D3), (D4) positive pole, electric capacity (C2) other end, auxiliary winding (N2) other end is connected to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200782777U CN2884414Y (en) | 2006-01-18 | 2006-01-18 | Automatic starting circuit for power-supply of color plasma display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200782777U CN2884414Y (en) | 2006-01-18 | 2006-01-18 | Automatic starting circuit for power-supply of color plasma display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2884414Y true CN2884414Y (en) | 2007-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200782777U Expired - Fee Related CN2884414Y (en) | 2006-01-18 | 2006-01-18 | Automatic starting circuit for power-supply of color plasma display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2884414Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101242138B (en) * | 2008-03-05 | 2011-02-09 | 艾默生网络能源有限公司 | A startup auxiliary power circuit |
| WO2011054164A1 (en) * | 2009-11-03 | 2011-05-12 | 四川虹欧显示器件有限公司 | Switched mode power supply for plasma display and its starting circuit |
| CN102739077A (en) * | 2012-07-23 | 2012-10-17 | 电子科技大学 | Auxiliary power supply of switching power supply |
| CN103901938A (en) * | 2012-12-27 | 2014-07-02 | 欧普照明股份有限公司 | Quick starting circuit and constant current drive circuit of integrated circuit |
-
2006
- 2006-01-18 CN CNU2006200782777U patent/CN2884414Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101242138B (en) * | 2008-03-05 | 2011-02-09 | 艾默生网络能源有限公司 | A startup auxiliary power circuit |
| WO2011054164A1 (en) * | 2009-11-03 | 2011-05-12 | 四川虹欧显示器件有限公司 | Switched mode power supply for plasma display and its starting circuit |
| CN102739077A (en) * | 2012-07-23 | 2012-10-17 | 电子科技大学 | Auxiliary power supply of switching power supply |
| CN103901938A (en) * | 2012-12-27 | 2014-07-02 | 欧普照明股份有限公司 | Quick starting circuit and constant current drive circuit of integrated circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SICHUAN SHIJI SHUANGHONG DISPLAY DEVICES CO., LTD Free format text: FORMER OWNER: IRICO GROUP ELECTRONICS CO., LTD. Effective date: 20071214 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071214 Address after: No. 35, Mian Xing East Road, hi tech Zone, Sichuan, Mianyang Province: 621000 Patentee after: Sichuan Sterope Orion Display Co., Ltd. Address before: No. 1, Rainbow Road, Shaanxi, Xianyang Province: 712021 Patentee before: IRICO Group Electronics Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070328 Termination date: 20140118 |