CN202309923U - Voltage stabilizing circuit - Google Patents
Voltage stabilizing circuit Download PDFInfo
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- CN202309923U CN202309923U CN 201120409967 CN201120409967U CN202309923U CN 202309923 U CN202309923 U CN 202309923U CN 201120409967 CN201120409967 CN 201120409967 CN 201120409967 U CN201120409967 U CN 201120409967U CN 202309923 U CN202309923 U CN 202309923U
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- resistance
- diode
- filter capacitor
- voltage stabilizing
- semiconductor
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Abstract
The utility model 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, a MOS (metal oxide semiconductor) tube, an NPN triode and a PNP triode, wherein the connection point of the negative pole of the fourth voltage stabilizing diode and the drain of the MOS tube is a voltage output end. The voltage stabilizing circuit disclosed by the utility model has a simple circuit structure, and is connected to both ends of a winding of a transformer; and voltage output by the voltage output end can satisfy the power supply of the television motherboard and the normal working voltage of the IC (integrated circuit) on the power source, thereby reducing the windings of the transformer and reducing the volume of the transformer.
Description
[technical field]
The utility model relates to television set, relates 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 utility model provides a kind of voltage stabilizing circuit, and it can reduce the winding of transformer, reduces volume of transformer.
The technical scheme of the utility model 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.
The voltage stabilizing circuit of the utility model, 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 the voltage stabilizing circuit circuit theory diagrams in one embodiment of the utility model.
[embodiment]
Below in conjunction with accompanying drawing the specific embodiment of the utility model is done a detailed elaboration.
The voltage stabilizing circuit of the utility model; 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 D3, the 4th voltage stabilizing didoe D4, M0S pipe 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, the voltage stabilizing circuit of the utility model, 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 utility model 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 the utility model execution mode does not constitute the qualification to the utility model protection range.The modification of being done within any spirit and principle at the utility model, be equal to replacement and improvement etc., all should be included within the claim protection range of the utility model.
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 |
|---|---|---|---|
| CN 201120409967 CN202309923U (en) | 2011-10-25 | 2011-10-25 | Voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120409967 CN202309923U (en) | 2011-10-25 | 2011-10-25 | Voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309923U true CN202309923U (en) | 2012-07-04 |
Family
ID=46378730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120409967 Expired - Fee Related CN202309923U (en) | 2011-10-25 | 2011-10-25 | Voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309923U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368813A (en) * | 2011-10-25 | 2012-03-07 | 深圳麦格米特电气股份有限公司 | Voltage-stabilizing circuit |
| CN109120902A (en) * | 2018-10-09 | 2019-01-01 | 六安腾达信息科技有限公司 | video security monitoring system |
-
2011
- 2011-10-25 CN CN 201120409967 patent/CN202309923U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368813A (en) * | 2011-10-25 | 2012-03-07 | 深圳麦格米特电气股份有限公司 | Voltage-stabilizing circuit |
| CN109120902A (en) * | 2018-10-09 | 2019-01-01 | 六安腾达信息科技有限公司 | video security monitoring system |
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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: 20120704 Termination date: 20191025 |