CN205005158U - TV power control circuit - Google Patents
TV power control circuit Download PDFInfo
- Publication number
- CN205005158U CN205005158U CN201520652517.9U CN201520652517U CN205005158U CN 205005158 U CN205005158 U CN 205005158U CN 201520652517 U CN201520652517 U CN 201520652517U CN 205005158 U CN205005158 U CN 205005158U
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- triode
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- power supply
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- power
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Abstract
The utility model relates to a TV technical field especially relates to a TV power control circuit, including three PNP type triode, the projecting pole of first triode passes through the ohmic connection and sets up behind the fuse of TV power input end, and the collecting electrode passes through RC parallel circuit ground connection, and the VCC power supply foot of resistance and integrated control IC chip is passed through to the base, the base of second triode is connected with the collecting electrode of first triode, and the projecting pole is connected with the base of third triode, and the collecting electrode is connected and ground connection with the collecting electrode of third triode, the projecting pole of third triode is connected with the base of first triode. The utility model discloses an after invention aim at solves the TV set power protection that unusual reason leads to, nor make TV set restart or restart the technical problem that switch also may not start immediately even get rid of the trouble, adopt the utility model provides a technical scheme can make the TV set return to normal through restarting the TV power under the TV power starting protection lock condition of dying.
Description
Technical field
The utility model relates to TV technology, particularly relates to a kind of TV power supply control circuit.
Background technology
In the TV power supply that design uses at present; some integrating control IC chip controlling TV power supply has protection locking function; when some external abnormal factorses cause TV power supply starting protection (as thundering); IC chip enable protection locking function; because the large electrochemical capacitor be connected with IC chip after starting protection also has electricity; and cannot release immediately to the VCC electric capacity electricity that IC powers; cause IC chip to be in guard mode always; electrochemical capacitor needs to discharge into VCC when can restart voltage, and start could start immediately again.Because existing power supply plate does not adopt Improving Measurements, also differ turn on television set immediately surely even if make user reopen AC power supplies, capacitance charge just can have been released time a couple of days possibly, once there is this situation, user may think that television set damages.
Utility model content
Goal of the invention of the present utility model is to provide a kind of TV power supply control circuit; after solving the TV set power protection that abnormal cause causes; the technical problem that even if removal fault can not make television set restart or restart mains switch also may not be started immediately; the technical scheme adopting the utility model to provide can, under TV power supply starting protection lock-up condition, can make television set recover normal by restarting TV power supply.
In order to reach foregoing invention object, the utility model provides a kind of TV power supply control circuit, and a kind of TV power supply control circuit comprises three PNP type triode, is respectively the first triode, the second triode and the 3rd triode; The emitter of described first triode is connected in the fuse of TV power supply input by resistance after, collector electrode is by RC parallel circuits ground connection, and base stage to be powered pin by the VCC of resistance and integrating control IC chip; The base stage of described second triode is connected with the collector electrode of described first triode, and emitter is connected with the base stage of described 3rd triode, and collector electrode is connected with the collector electrode of described 3rd triode and ground connection; The emitter of described 3rd triode is connected with the base stage of described first triode.
Optionally, the resistance value of the resistance of described RC parallel circuits is 2M Ω, and the capacitance of electric capacity is 1 μ F.
Optionally, the resistance of the resistance be connected with the emitter of described first triode to be three resistance values be 220k Ω; The resistance of the resistance be connected with the base stage of described first triode to be a resistance value be 100k Ω.
Compared to prior art; the utility model adopts triode and coordinating between RC parallel circuits; can when TV power supply starting protection be locked; by the conducting of circuit, the VCC electric capacity of integrating control IC chip can be discharged over the ground by triode; television set can be made to recover normal by restarting AC power supplies, user can not be caused to think, and television set damages and solves the effect turned off TV set power rear indicator light and extinguish immediately.In like manner, when normal work or standby time turn off AC power supplies, the VCC voltage of integrating control IC chip can be released immediately, and integrating control IC chip quits work, so secondary output voltage also can disappear immediately, television set front end indicator light can extinguish fast.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.Apparently, the accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the utility model embodiment circuit diagram.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment 1
As shown in Figure 1, present embodiment discloses a kind of TV power supply control circuit, comprise three PNP type triode, be respectively the first triode Q1, the second triode Q2 and the 3rd triode Q3.
The emitter of the first triode Q1 is connected in the fuse of TV power supply input by resistance R1 after, i.e. VAC end, the resistance of the resistance R1 that should be connected with the emitter of the first triode Q1 to be three resistance values be 220k Ω; Collector electrode is by RC parallel circuits ground connection; Base stage to be powered pin, i.e. VCC end by the VCC of resistance R2 and integrating control IC chip, the resistance of the resistance R2 that should be connected with the base stage of the first triode Q1 to be a resistance value be 100k Ω.Wherein the resistance value of the resistance R3 of RC parallel circuits is 2M Ω, and the capacitance of electric capacity C1 is 1 μ F.
The base stage of the second triode Q2 is connected with the collector electrode of the first triode Q1, emitter is connected with the base stage of the 3rd triode Q3, collector electrode is connected with the collector electrode of the 3rd triode Q3 and ground connection, and the emitter of the 3rd triode Q3 is connected with the base stage of the first triode Q1.
During work, after VAC end is connected to TV power supply input fuse, the VCC that VCC end is connected to integrating control IC chip powers pin, when after the energising of TV power supply input, because the voltage of VCC end is not also set up, first triode Q1 conducting, charge to electric capacity C1, to VCC end Voltage Establishment get up after, the first triode Q1 ends, the voltage at electric capacity C1 two ends makes the second triode Q2 and the 3rd triode Q3 end, and circuit normally works.
Locked once the protection of integrating control IC chip enable; when the capacitance voltage of VCC end cannot be released and be needed to restart; turn off TV power supply input power supply; electric capacity C1 is discharged by resistance R3; second triode Q2 and the 3rd triode Q3 conducting; the electric capacity of VCC end can be discharged over the ground by the second triode Q2 and the 3rd triode Q3; television set can be made to recover normal by restarting AC power supplies, user can not be caused to think, and television set damages and solves the effect turned off TV set power rear indicator light and extinguish immediately.
In like manner, when normal work or standby time turn off TV power supply input power supply, the voltage of VCC end can be released immediately, and integrating control IC chip quits work, so secondary output voltage also can disappear immediately, television set front end indicator light can extinguish fast.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The amendment done within any spirit at above-mentioned execution mode and principle, equivalently to replace and improvement etc., within the protection range that all should be included in this technical scheme.
Claims (3)
1. a TV power supply control circuit, is characterized in that:
Comprise three PNP type triode, be respectively the first triode, the second triode and the 3rd triode;
The emitter of described first triode is connected in the fuse of TV power supply input by resistance after, collector electrode is by RC parallel circuits ground connection, and base stage to be powered pin by the VCC of resistance and integrating control IC chip;
The base stage of described second triode is connected with the collector electrode of described first triode, and emitter is connected with the base stage of described 3rd triode, and collector electrode is connected with the collector electrode of described 3rd triode and ground connection;
The emitter of described 3rd triode is connected with the base stage of described first triode.
2. a kind of TV power supply control circuit according to claim 1, is characterized in that:
The resistance value of the resistance of described RC parallel circuits is 2M Ω, and the capacitance of electric capacity is 1 μ F.
3. a kind of TV power supply control circuit according to claim 2, is characterized in that:
The resistance of the resistance be connected with the emitter of described first triode to be three resistance values be 220k Ω;
The resistance of the resistance be connected with the base stage of described first triode to be a resistance value be 100k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520652517.9U CN205005158U (en) | 2015-08-25 | 2015-08-25 | TV power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520652517.9U CN205005158U (en) | 2015-08-25 | 2015-08-25 | TV power control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205005158U true CN205005158U (en) | 2016-01-27 |
Family
ID=55162026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520652517.9U Expired - Fee Related CN205005158U (en) | 2015-08-25 | 2015-08-25 | TV power control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205005158U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769552A (en) * | 2019-10-31 | 2020-02-07 | 深圳市崧盛电子股份有限公司 | Output short circuit back quick recovery circuit and LED drive power supply |
-
2015
- 2015-08-25 CN CN201520652517.9U patent/CN205005158U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769552A (en) * | 2019-10-31 | 2020-02-07 | 深圳市崧盛电子股份有限公司 | Output short circuit back quick recovery circuit and LED drive power supply |
| CN110769552B (en) * | 2019-10-31 | 2021-05-18 | 深圳市崧盛电子股份有限公司 | Output short circuit back quick recovery circuit and LED drive power supply |
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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 |
Granted publication date: 20160127 Termination date: 20170825 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |