CN102368813A - Voltage-stabilizing circuit - Google Patents
Voltage-stabilizing circuit Download PDFInfo
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- CN102368813A CN102368813A CN2011103272748A CN201110327274A CN102368813A CN 102368813 A CN102368813 A CN 102368813A CN 2011103272748 A CN2011103272748 A CN 2011103272748A CN 201110327274 A CN201110327274 A CN 201110327274A CN 102368813 A CN102368813 A CN 102368813A
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Abstract
The invention discloses a voltage-stabilizing circuit which comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, an inductor, a third filter capacitor, a fourth filter capacitor, a fifth filter capacitor, a sixth capacitor, a seventh capacitor, a first diode, a second diode, a third diode, a fourth voltage-stabilizing diode, an MOS (Metal Oxide Semiconductor) transistor, an NPN (Negative Positive Negative) triode and a PNP (Positive Negative Positive) triode, wherein a connecting point between the negative electrode of the fourth voltage-stabilizing diode and the drain electrode of the MOS transistor is used as a voltage output end. The voltage-stabilizing circuit disclosed by the invention has a simple structure, and is connected at two ends of a winding of a transformer; and voltage output by the voltage output end can meet the demands of power supply for a mainboard of a television and the normal working voltage of an IC on a power supply, thus the winding of the transformer can be reduced and the volume of the transformer is decreased.
Description
[technical field]
The present invention relates to television set, relate in particular to a kind of voltage stabilizing circuit that satisfies IC normal working voltage on TV SKD power supply and the power supply.
[background technology]
In the prior art, when IC UCC25600 supplied power on to TV SKD power supply and power supply, the Transformer Winding of employing was many, and volume of transformer is bigger.
[summary of the invention]
The invention provides a kind of voltage stabilizing circuit, it can reduce the winding of transformer, reduces volume of transformer.
Technical scheme of the present invention is:
A kind of voltage stabilizing circuit comprises: first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, first electric capacity, second electric capacity, inductance, the 3rd filter capacitor, the 4th filter capacitor, the 5th filter capacitor, the 6th electric capacity, the 7th electric capacity, first diode, second diode, the 3rd diode, the 4th voltage stabilizing didoe, metal-oxide-semiconductor, NPN triode, PNP triode;
The anode of first diode and second diode, and an end of first resistance and second resistance be connected with first end of Transformer Winding respectively; The tie point of first resistance and the other end of second resistance is connected with the positive pole of the 3rd filter capacitor, first end of inductance with second electric capacity through first electric capacity respectively, and the negative pole of the 3rd filter capacitor, the 4th filter capacitor, the 5th filter capacitor is distinguished ground connection and is connected with second end of Transformer Winding; The negative electrode of first diode and second diode is connected with the positive pole of the 3rd filter capacitor respectively; The positive pole of the 4th filter capacitor is connected with first end of inductance; Second end of inductance is connected with the positive pole of the 5th filter capacitor, an end of the 3rd resistance, an end of the 6th electric capacity, the source electrode of metal-oxide-semiconductor, the emitter of PNP triode respectively; The other end of the 3rd resistance is connected with an end of the 4th resistance and the anode of the 3rd diode respectively; The other end of the negative electrode of the 3rd diode and the 4th resistance is connected with the grid of metal-oxide-semiconductor respectively; The other end of the 6th electric capacity is connected with the grid of metal-oxide-semiconductor, and the grid of metal-oxide-semiconductor also is connected with the collector electrode of PNP triode, is connected with the drain electrode of metal-oxide-semiconductor through the 7th electric capacity through the 5th resistance; The base stage of PNP triode is connected with the emitter of PNP triode, is connected with the collector electrode of NPN triode through the 6th resistance through the 7th resistance; The base stage of NPN triode is through the 8th grounding through resistance; The grounded emitter of NPN triode; The base stage of NPN triode also is connected with the positive pole of the 4th voltage stabilizing didoe through the 9th resistance, and the negative pole of the 4th voltage stabilizing didoe is connected with the drain electrode of metal-oxide-semiconductor, and the tie point of the negative pole of the 4th voltage stabilizing didoe and the drain electrode of metal-oxide-semiconductor is a voltage output end.
Voltage stabilizing circuit of the present invention, circuit structure is simple, is connected the two ends of the winding of transformer, and the voltage of voltage output end output can satisfy IC normal working voltage on TV SKD power supply and the power supply, can reduce the winding of transformer, reduces volume of transformer.
[description of drawings]
Fig. 1 is voltage stabilizing circuit of the present invention circuit theory diagrams in one embodiment.
[embodiment]
Below in conjunction with accompanying drawing specific embodiment of the present invention is done a detailed elaboration.
Voltage stabilizing circuit of the present invention; Can satisfy IC (UCC25600) normal working voltage on TV SKD power supply and the power supply; Like Fig. 1, it comprises: first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, first capacitor C 1, second capacitor C 2, inductance L 1, the 3rd filter capacitor C3, the 4th filter capacitor C4, the 5th filter capacitor C5, the 6th capacitor C 6, the 7th capacitor C 7, the first diode D1, the second diode D2, the 3rd diode D 3, the 4th voltage stabilizing didoe D4, metal-oxide-semiconductor Q1, NPN triode Q3, PNP triode Q2;
The anode of the first diode D1 and the second diode D2, and an end of first resistance R 1 and second resistance R 2 be connected with first end of transformer T1 winding respectively; The tie point of first resistance R 1 and the other end of second resistance R 2 is connected with the positive pole of the 3rd filter capacitor C3, first end of inductance L 1 with second capacitor C 2 through first capacitor C 1 respectively, and the negative pole of the 3rd filter capacitor C3, the 4th filter capacitor C4, the 5th filter capacitor C5 is distinguished ground connection and is connected with second end of transformer T1 winding; The negative electrode of the first diode D1 and the second diode D2 is connected with the positive pole of the 3rd filter capacitor C3 respectively; The positive pole of the 4th filter capacitor C4 is connected with first end of inductance L 1; Second end of inductance L 1 is connected with the positive pole of the 5th filter capacitor C5, an end of the 3rd resistance R 3, an end of the 6th capacitor C 6, the source electrode of metal-oxide-semiconductor Q1, the emitter of PNP triode Q2 respectively; The other end of the 3rd resistance R 3 is connected with an end of the 4th resistance R 4 and the anode of the 3rd diode D3 respectively; The other end of the negative electrode of the 3rd diode D3 and the 4th resistance R 4 is connected with the grid of metal-oxide-semiconductor Q1 respectively; The other end of the 6th capacitor C 6 is connected with the grid of metal-oxide-semiconductor Q1, and the grid of metal-oxide-semiconductor Q1 also is connected with the collector electrode of PNP triode Q2, is connected with the drain electrode of metal-oxide-semiconductor Q1 through the 7th capacitor C 7 through the 5th resistance R 5; The base stage of PNP triode Q2 is connected with the emitter of PNP triode Q3, is connected with the collector electrode of NPN triode Q3 through the 6th resistance R 6 through the 7th resistance R 7; The base stage of NPN triode Q3 is through the 8th resistance R 8 ground connection; The grounded emitter of NPN triode Q3; The base stage of NPN triode Q3 also is connected with the positive pole of the 4th voltage stabilizing didoe D4 through the 9th resistance R 9; The negative pole of the 4th voltage stabilizing didoe D4 is connected with the drain electrode of metal-oxide-semiconductor Q1, and the tie point of the drain electrode of the negative pole of the 4th voltage stabilizing didoe D4 and metal-oxide-semiconductor Q1 is a voltage output end.
IC on the power supply is 11.5-18V such as the recommended work voltage range of UCC25600, and shutoff voltage is 8.9-10.1V; The supply district of TV SKD is 10.8-13.2V, in order to satisfy UCC25600 and main board power supply requirement, makes the few winding of transformer again, then can make voltage output end output 12.5V voltage.
Transformer T1 winding is through the Filtering Processing of the rectification of the first diode D1 and the second diode D2, the 3rd filter capacitor C3, the 4th filter capacitor C4, the 5th filter capacitor C5, and the voltage at port one place is 13V; Metal-oxide-semiconductor Q1 switches metal-oxide-semiconductor, when port 2 places are low level, and metal-oxide-semiconductor Q1 conducting, voltage output end has voltage output, is output as 12.5V; And adjust the S-G voltage of metal-oxide-semiconductor Q1 through the 4th voltage stabilizing didoe D4, the 9th resistance R 9, the 8th resistance R 8, NPN triode Q3, PNP triode Q2, the 6th resistance R 6, the 7th resistance R 7, the 5th resistance R 5, so that the voltage of voltage output end output is stabilized in 12.5V.
This shows, voltage stabilizing circuit of the present invention, circuit structure is simple; Be connected the two ends of the winding of transformer; The voltage of voltage output end output can satisfy IC normal working voltage on TV SKD power supply and the power supply, can reduce the winding of transformer, reduces volume of transformer.
In a preferred embodiment; Voltage for the output of burning voltage output further; The present invention also comprises the tenth resistance R 10 and the 11 resistance R 11; One end of the tenth resistance R 10 and the 11 resistance R 11 is connected with voltage output end respectively, another termination power end of the tenth resistance R 10 (being 5V shown in the figure), the other end ground connection of the 11 resistance R 11.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.
Claims (2)
1. voltage stabilizing circuit; It is characterized in that, comprising: first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, first electric capacity, second electric capacity, inductance, the 3rd filter capacitor, the 4th filter capacitor, the 5th filter capacitor, the 6th electric capacity, the 7th electric capacity, first diode, second diode, the 3rd diode, the 4th voltage stabilizing didoe, metal-oxide-semiconductor, NPN triode, PNP triode;
The anode of first diode and second diode, and an end of first resistance and second resistance be connected with first end of Transformer Winding respectively; The tie point of first resistance and the other end of second resistance is connected with the positive pole of the 3rd filter capacitor, first end of inductance with second electric capacity through first electric capacity respectively, and the negative pole of the 3rd filter capacitor, the 4th filter capacitor, the 5th filter capacitor is distinguished ground connection and is connected with second end of Transformer Winding; The negative electrode of first diode and second diode is connected with the positive pole of the 3rd filter capacitor respectively; The positive pole of the 4th filter capacitor is connected with first end of inductance; Second end of inductance is connected with the positive pole of the 5th filter capacitor, an end of the 3rd resistance, an end of the 6th electric capacity, the source electrode of metal-oxide-semiconductor, the emitter of PNP triode respectively; The other end of the 3rd resistance is connected with an end of the 4th resistance and the anode of the 3rd diode respectively; The other end of the negative electrode of the 3rd diode and the 4th resistance is connected with the grid of metal-oxide-semiconductor respectively; The other end of the 6th electric capacity is connected with the grid of metal-oxide-semiconductor, and the grid of metal-oxide-semiconductor also is connected with the collector electrode of PNP triode, is connected with the drain electrode of metal-oxide-semiconductor through the 7th electric capacity through the 5th resistance; The base stage of PNP triode is connected with the emitter of PNP triode, is connected with the collector electrode of NPN triode through the 6th resistance through the 7th resistance; The base stage of NPN triode is through the 8th grounding through resistance; The grounded emitter of NPN triode; The base stage of NPN triode also is connected with the positive pole of the 4th voltage stabilizing didoe through the 9th resistance, and the negative pole of the 4th voltage stabilizing didoe is connected with the drain electrode of metal-oxide-semiconductor, and the tie point of the negative pole of the 4th voltage stabilizing didoe and the drain electrode of metal-oxide-semiconductor is a voltage output end.
2. voltage stabilizing circuit according to claim 1; It is characterized in that: also comprise the tenth resistance and the 11 resistance; One end of the tenth resistance and the 11 resistance is connected with voltage output end respectively, another termination power end of the tenth resistance, the other end ground connection of the 11 resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103272748A CN102368813A (en) | 2011-10-25 | 2011-10-25 | Voltage-stabilizing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103272748A CN102368813A (en) | 2011-10-25 | 2011-10-25 | Voltage-stabilizing circuit |
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| CN102368813A true CN102368813A (en) | 2012-03-07 |
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| CN2011103272748A Pending CN102368813A (en) | 2011-10-25 | 2011-10-25 | Voltage-stabilizing circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345745A (en) * | 2014-11-07 | 2015-02-11 | 重庆颐洋企业发展有限公司 | Stepless liquid level control device of hyperpure water machine water storage tank |
| CN109120902A (en) * | 2018-10-09 | 2019-01-01 | 六安腾达信息科技有限公司 | video security monitoring system |
| CN109215545A (en) * | 2018-11-20 | 2019-01-15 | 安徽奕甲文化传媒有限责任公司 | Intelligent merchandise display purchase guiding system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06253238A (en) * | 1993-02-26 | 1994-09-09 | Toei Tsushin Kogyo Kk | Voltage stabilizing circuit |
| CN201039012Y (en) * | 2007-04-12 | 2008-03-19 | 高永利 | Components for color TV switch power |
| CN101510103A (en) * | 2008-10-24 | 2009-08-19 | 深圳创维－Rgb电子有限公司 | Secondary voltage relief switch stable voltage power source |
| CN102222490A (en) * | 2011-07-26 | 2011-10-19 | 青岛海信电器股份有限公司 | Back light source drive circuit and television |
| CN202309923U (en) * | 2011-10-25 | 2012-07-04 | 深圳麦格米特电气股份有限公司 | Voltage stabilizing circuit |
-
2011
- 2011-10-25 CN CN2011103272748A patent/CN102368813A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06253238A (en) * | 1993-02-26 | 1994-09-09 | Toei Tsushin Kogyo Kk | Voltage stabilizing circuit |
| CN201039012Y (en) * | 2007-04-12 | 2008-03-19 | 高永利 | Components for color TV switch power |
| CN101510103A (en) * | 2008-10-24 | 2009-08-19 | 深圳创维－Rgb电子有限公司 | Secondary voltage relief switch stable voltage power source |
| CN102222490A (en) * | 2011-07-26 | 2011-10-19 | 青岛海信电器股份有限公司 | Back light source drive circuit and television |
| CN202309923U (en) * | 2011-10-25 | 2012-07-04 | 深圳麦格米特电气股份有限公司 | Voltage stabilizing circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345745A (en) * | 2014-11-07 | 2015-02-11 | 重庆颐洋企业发展有限公司 | Stepless liquid level control device of hyperpure water machine water storage tank |
| CN109120902A (en) * | 2018-10-09 | 2019-01-01 | 六安腾达信息科技有限公司 | video security monitoring system |
| CN109215545A (en) * | 2018-11-20 | 2019-01-15 | 安徽奕甲文化传媒有限责任公司 | Intelligent merchandise display purchase guiding system |
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Application publication date: 20120307 |