CN2824470Y - Power output voltage regulating circuit and television with same - Google Patents
Power output voltage regulating circuit and television with same Download PDFInfo
- Publication number
- CN2824470Y CN2824470Y CN 200520087775 CN200520087775U CN2824470Y CN 2824470 Y CN2824470 Y CN 2824470Y CN 200520087775 CN200520087775 CN 200520087775 CN 200520087775 U CN200520087775 U CN 200520087775U CN 2824470 Y CN2824470 Y CN 2824470Y
- Authority
- CN
- China
- Prior art keywords
- switch element
- circuit
- voltage
- power output
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a power output voltage regulating circuit and a television having the regulating circuit, which comprises an alternating current power supply and a voltage changer, wherein a feedback adjustment circuit is connected with the output end of a direct current voltage of the voltage changer. In the feedback adjustment circuit, the intensity of an optical coupling electric current which flows can be changed because the conduction and the cutoff of a three electro tube of a switching component can be controlled, and therewith, the stability and the switching of the output voltage of the power supply can be realized. The utility model adopts a simple circuit construction and uses minimum components to achieve the effective switching of the output voltage of the power supply, so that the output of the power supply of the television can be carried out adjusting among the voltages, thereby, the cost of the power supply circuit is effectively lowered and the utility model has larger instructional significance for the design and the application of other circuits from now on.
Description
Technical field
The utility model relates to a kind of improvement of TV set circuit, and specifically, the output voltage that relates to a kind of TV set power is adjusted circuit.
Background technology
Along with the development of society, the usage quantity of household electrical appliance is huge day by day, and the wasting of resources problem that household electrical appliances cause when standby is also serious day by day.For realizing the purpose of standby low-power consumption, need do bigger adjustment to each road output voltage of power supply.At present, in most of power circuit, realize that the adjustment of output voltage needs the circuit of configuration structure complexity to be realized, thereby cause equipment cost height, reliability low, be unfavorable for the problem that product is used widely and promoted.
Summary of the invention
The utility model is in order to solve power supply regulator circuit complex structure in the prior art, the problem that cost is high, provide the dynamo-electric source of a kind of novel TV output voltage to adjust circuit, with simple circuit configuration power supply control sample circuit is adjusted, thereby realized effective switching of electric power output voltage, reduce the cost of equipment, improved the reliability of system.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of electric power output voltage is adjusted circuit and is had the television set of described adjustment circuit, comprises AC power and transformer, is connected with a feedback adjusting circuit at the dc voltage output end of described transformer; In described feedback adjusting circuit, a dc voltage output end of transformer connects the gating end of first switch element on the other hand on the one hand through the adjustable adjuster ground connection of one or three ends; The reference voltage control end of the adjustable adjuster of described three ends connects second dc power output end of transformer on the one hand through a resistance, on the other hand through another grounding through resistance; The control end of described first switch element connects the 3rd dc power output end of transformer on the one hand through a voltage-stabiliser tube, and through a grounding through resistance, the gating end that connects the second switch element on the other hand, another gating end ground connection of described second switch element, control end receives the control command signal of external circuit output.
As the further qualification to technique scheme, first dc voltage output end of described transformer links to each other through the gating end of an optocoupler with the adjustable adjuster of described three ends and first switch element.
As the further qualification again to technique scheme, described first switch element adopts a NPN type triode to realize that the collector electrode of described triode links to each other with the adjustable adjuster of three ends, grounded emitter, and base stage links to each other with the gating end of described second switch element.Described second switch element also adopts a NPN type triode to realize, the collector electrode of described triode links to each other grounded emitter, the control command signal output of base stage connection external circuit with base stage as the triode of first switch element.
As to further the limiting again of technique scheme, described control command signal is by the CPU of master control borad or the high-low level signal that sent by the external switch circuit.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is provided with the feedback adjusting circuit by the dc power output end at transformer, the power supply output of television set is adjusted between each voltage, thereby realized effective switching of electric power output voltage with simple circuit configuration, minimum components and parts, effectively reduce the cost of power circuit, the design application of other circuit is from now on had bigger directive significance.
Description of drawings
Fig. 1 is the schematic diagram that the utility model TV set power output voltage is adjusted circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
Among Fig. 1, be connected with a feedback adjusting circuit at dc power output end Vcc, V-out1, the V-out2 of transformer.In described feedback adjusting circuit, power output end Vcc gives optocoupler U1 power supply through the luminous end of resistance R 1 connection optocoupler U1, and its light-receiving end connects the elementary control pin of power supply.Dc power output end V-out1 is through resistance R 2, R3 ground connection, and its connected node links to each other with the reference voltage control end of the adjustable adjuster TL431 of three ends.The adjustable adjuster TL431 of described three ends links to each other with the luminous end of optocoupler U1 and the collector electrode of NPN type triode Q1 respectively, the grounded emitter of described triode Q1, and base stage links to each other with the collector electrode of another NPN type triode Q2.The grounded emitter of described triode Q2, base stage connects the control command signal Sign that external circuit sends through resistance R 6.Dc power output end V-out2 is through voltage-stabiliser tube ZD1, resistance R 4, R5 ground connection, and the connected node of its resistance R 4, R5 links to each other with the base stage of triode Q1.
Described control command signal Sign is by the CPU of master control borad or the high-low level pulse signal that sent by the external switch circuit.When the television set operate as normal, control command signal Sign is a high level, triode Q2 conducting, and its collector and emitter is equivalent to short circuit over the ground, and dc power output end V-out2 arrives ground through voltage-stabiliser tube ZD1, resistance R 4.At this moment,, triode Q1 is ended because the base voltage of triode Q1 is lower, inoperative, thus make electric power output voltage V-out2 uncontrollable.Electric power output voltage Vcc gives optocoupler U1 power supply by resistance R 1, connect by the adjustable adjuster TL431 of three ends then and adjust resistance R 2, R3, the reference voltage of the adjustable adjuster TL431 of described three ends is 2.5V, when the node voltage of resistance R 2, R3 surpasses 2.5V, adjuster TL431 conducting amplitude increases, and the electric current that flows through optocoupler U1 is increased, thus the elementary control pin of control power supply, change the output voltage of transformer, reduce the magnitude of voltage of power output end V-out1.When the node voltage of resistance R 2, R3 is lower than 2.5V, adjuster TL431 conducting amplitude reduces, the electric current that flows through optocoupler U1 is reduced, thereby the elementary control pin of control power supply, change the output voltage of transformer, increase the magnitude of voltage of power output end V-out1, with the magnitude of voltage of this stabilized power supply output V-out1.The resistance of resistance R 2, R3 has determined the magnitude of voltage of power output end V-out1.
When the television set standby, control command signal Sign output low level, the collector and emitter of triode Q2 opens circuit, and triode Q2 is inoperative, and at this moment, power output end V-out2 is through voltage-stabiliser tube ZD1, resistance R 4, R5 ground connection.When the overtension of power output end V-out2, puncture voltage-stabiliser tube ZD1, the base voltage of rising triode Q1, control triode Q1 conducting, the electric current that flows through optocoupler U1 is increased, and control transformer reduces output voltage, thereby reduces the voltage of power output end V-out1, V-out2.After the voltage of power output end V-out2 reduced, voltage-stabiliser tube ZD1 ended, and triode Q1 ends, and the electric current that flows through optocoupler U1 reduces, thereby the transformer output voltage is raise, with the magnitude of voltage of this stabilized power supply output V-out2.Realized base voltage thus, and then determined the size of output voltage V-out1, V-out2 by the voltage swing control triode Q1 of output V-out2.
The utility model adjusts television set output by adopting above-mentioned simple circuit configuration between each voltage, realized the handoff functionality of electric power output voltage, and circuit structure is simple, dependable performance.Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1. an electric power output voltage is adjusted circuit, comprise AC power and transformer, it is characterized in that: the dc voltage output end at described transformer is connected with a feedback adjusting circuit, in described feedback adjusting circuit, a dc voltage output end (Vcc) of transformer connects the gating end of first switch element on the other hand on the one hand through the adjustable adjuster of one or three ends (TL431) ground connection; The reference voltage control end of the adjustable adjusters of described three ends (TL431) connects second dc power output end (V-out1) of transformer on the one hand through a resistance (R2), on the other hand through another resistance (R3) ground connection; The control end of described first switch element connects the 3rd dc power output end (V-out2) of transformer on the one hand through a voltage-stabiliser tube (ZD1), and through a resistance (R5) ground connection, the gating end that connects the second switch element on the other hand, another gating end ground connection of described second switch element, control end receives the control command signal of external circuit output.
2. electric power output voltage according to claim 1 is adjusted circuit, and it is characterized in that: first dc voltage output end (Vcc) of described transformer links to each other through the gating end of an optocoupler (U1) with the adjustable adjusters of described three ends (TL431) and first switch element.
3. electric power output voltage according to claim 1 and 2 is adjusted circuit, it is characterized in that: described first switch element adopts a NPN type triode (Q1) to realize, the collector electrode of described triode (Q1) links to each other with the adjustable adjuster of three ends (TL431), grounded emitter, base stage links to each other with the gating end of described second switch element.
4. electric power output voltage according to claim 3 is adjusted circuit, it is characterized in that: described second switch element adopts a NPN type triode (Q2) to realize, the collector electrode of described triode (Q2) links to each other with base stage as the triode (Q1) of first switch element, grounded emitter, base stage connects the control command signal output of external circuit.
5. electric power output voltage according to claim 4 is adjusted circuit, and it is characterized in that: described control command signal is by the CPU of master control borad or the high-low level signal that is sent by the external switch circuit.
6. one kind has the television set that described electric power output voltage is adjusted circuit, comprise AC power and transformer, it is characterized in that: the dc voltage output end at described transformer is connected with a feedback adjusting circuit, in described feedback adjusting circuit, a dc voltage output end (Vcc) of transformer connects the gating end of first switch element on the other hand on the one hand through the adjustable adjuster of one or three ends (TL431) ground connection; The reference voltage control end of the adjustable adjusters of described three ends (TL431) connects second dc power output end (V-out1) of transformer on the one hand through a resistance (R2), on the other hand through another resistance (R3) ground connection; The control end of described first switch element connects the 3rd dc power output end (V-out2) of transformer on the one hand through a voltage-stabiliser tube (ZD1), and through a resistance (R5) ground connection, the gating end that connects the second switch element on the other hand, another gating end ground connection of described second switch element, control end receives the control command signal of external circuit output.
7. the television set with described electric power output voltage adjustment circuit according to claim 6, it is characterized in that: first dc voltage output end (Vcc) of described transformer links to each other through the gating end of an optocoupler (U1) with the adjustable adjusters of described three ends (TL431) and first switch element.
8. according to claim 6 or 7 described television sets with described electric power output voltage adjustment circuit, it is characterized in that: described first switch element adopts a NPN type triode (Q1) to realize, the collector electrode of described triode (Q1) links to each other with the adjustable adjuster of three ends (TL431), grounded emitter, base stage links to each other with the gating end of described second switch element.
9. the television set with described electric power output voltage adjustment circuit according to claim 8, it is characterized in that: described second switch element adopts a NPN type triode (Q2) to realize, the collector electrode of described triode (Q2) links to each other with base stage as the triode (Q1) of first switch element, grounded emitter, base stage connects the control command signal output of external circuit.
10. the television set with described electric power output voltage adjustment circuit according to claim 9, it is characterized in that: described control command signal is by the CPU of master control borad or the high-low level signal that is sent by the external switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087775 CN2824470Y (en) | 2005-09-30 | 2005-09-30 | Power output voltage regulating circuit and television with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087775 CN2824470Y (en) | 2005-09-30 | 2005-09-30 | Power output voltage regulating circuit and television with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2824470Y true CN2824470Y (en) | 2006-10-04 |
Family
ID=37033588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520087775 Expired - Fee Related CN2824470Y (en) | 2005-09-30 | 2005-09-30 | Power output voltage regulating circuit and television with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2824470Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386766A (en) * | 2010-09-01 | 2012-03-21 | 康佳集团股份有限公司 | Switch power supply |
| CN103245904A (en) * | 2012-02-10 | 2013-08-14 | 阿尔卡特朗讯 | Method and device for testing functional circuit |
-
2005
- 2005-09-30 CN CN 200520087775 patent/CN2824470Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386766A (en) * | 2010-09-01 | 2012-03-21 | 康佳集团股份有限公司 | Switch power supply |
| CN102386766B (en) * | 2010-09-01 | 2016-03-16 | 康佳集团股份有限公司 | A kind of Switching Power Supply |
| CN103245904A (en) * | 2012-02-10 | 2013-08-14 | 阿尔卡特朗讯 | Method and device for testing functional circuit |
| CN103245904B (en) * | 2012-02-10 | 2016-03-30 | 阿尔卡特朗讯 | A kind of method for test function circuit and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101848577B (en) | LED driving system and driving method | |
| CN103354690B (en) | Auxiliary-winding-free primary side controlled LED (light-emitting diode) driving circuit and PFC (power factor correction) constant-current control circuit thereof | |
| CN112867207B (en) | High-linearity TRIAC dimming compatible LED driving circuit | |
| CN203645858U (en) | Step-down control chip, step-down LED drive circuit and display screen | |
| CN2824470Y (en) | Power output voltage regulating circuit and television with same | |
| CN205210746U (en) | Constant current control ware and constant current control circuit | |
| CN2822061Y (en) | Power output voltage switching circuit and TV set having said switch circuit | |
| CN201336633Y (en) | Capacitor voltage reduction power supply circuit | |
| CN204117010U (en) | Switching mode mu balanced circuit, constant pressure and flow produce circuit and constant voltage constant current power equipment | |
| CN209488469U (en) | The unilateral adjuster and adjustment system of comparator-type | |
| CN206024154U (en) | LED light modulating devices and LED drive power | |
| CN2894147Y (en) | Standby regulating switching circuit for TV power supply | |
| CN208285214U (en) | A kind of stagnant ring driving device of low-power consumption | |
| CN212969038U (en) | Overvoltage protection circuit and electronic equipment | |
| CN205283887U (en) | LED dimmer circuit and LED drive circuit | |
| CN200950637Y (en) | Low-power consumption standing circuit and television set having the same | |
| CN203387740U (en) | Primary control LED drive circuit without auxiliary winding and PFC constant current control circuit thereof | |
| CN208364451U (en) | A kind of light-adjusting and speed-adjusting circuit and case fan light-adjusting and speed-adjusting system | |
| CN105515357A (en) | DCDC current-limiting circuit | |
| CN202998558U (en) | Driving device and lighting device comprising same | |
| CN2831648Y (en) | Standby control circuit of TV set | |
| CN102097063B (en) | LCD backlight power source and television | |
| CN205584007U (en) | Converter switching power supply circuit | |
| CN204795745U (en) | LED dimmer circuit in a poor light and TV set | |
| CN101715266B (en) | Circuit applicable to silicon controlled rectifier dimming under alternating current capacitive load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |