CN203706002U - Circuit for reducing standby power consumption - Google Patents
Circuit for reducing standby power consumption Download PDFInfo
- Publication number
- CN203706002U CN203706002U CN201420053656.5U CN201420053656U CN203706002U CN 203706002 U CN203706002 U CN 203706002U CN 201420053656 U CN201420053656 U CN 201420053656U CN 203706002 U CN203706002 U CN 203706002U
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- resistance
- triode
- voltage stabilizing
- 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 - Lifetime
Links
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 230000000087 stabilizing effect Effects 0.000 claims description 38
- 239000003990 capacitor Substances 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract 5
- 230000006641 stabilisation Effects 0.000 abstract 5
- 238000011105 stabilization Methods 0.000 abstract 5
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Control Of Voltage And Current In General (AREA)
Abstract
The utility model provides a circuit for reducing standby power consumption. The circuit comprises an optical coupling feedback circuit, a voltage stabilization reference circuit, a voltage sampling circuit and a voltage adjusting circuit. The optical coupling feedback circuit comprises an optical coupler and a first resistor connected with the optical coupler in parallel. The voltage stabilization reference circuit comprises a voltage stabilization reference device, a first capacitor and a second resistor. The voltage sampling circuit comprises a third resistor and a fourth resistor connected with the third resistor. The voltage adjusting circuit comprises a triode. The collector electrode of the triode is connected with a fifth resistor, the base electrode of the triode is connected with an external standby signal source, a sixth resistor is arranged between the base electrode and the standby signal source, the emitter electrode of the triode is connected with the ground, and a seventh resistor is arranged between the emitter electrode and the base electrode. The optical coupling feedback circuit is connected with the voltage stabilization reference circuit, and the voltage stabilization reference circuit is respectively connected with the voltage sampling circuit and the voltage adjusting circuit. The output reference of a main power supply is switched through standby signals of a master control chip, and therefore the standby power consumption is reduced.
Description
Technical field
The utility model relates to TV set circuit technical field, relates in particular to a kind of circuit that improves stand-by power consumption.
Background technology
Along with the development of intelligent television in recent years, people often want, in the time not using TV, TV is switched to holding state, rather than directly shutdown.When existing TV enters holding state, the confession electrical power consumed of master control display chip is down to 5V from 12V, then is down to the secondary conversions such as 3.3V from 5V.But the pressure drop for the first time of master control display chip is 7V, this conversion power consumption is higher, can cause the waste of power consumption, is unfavorable for energy-conserving and environment-protective.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of circuit that improves stand-by power consumption is provided, and utilizes the standby signal of main control chip to switch the output reference of primary power, thereby reduces stand-by power consumption.
For solving above technical matters, the utility model embodiment provides a kind of circuit that improves stand-by power consumption, comprising: optocoupler feedback circuit, voltage stabilizing reference circuit, voltage sampling circuit and voltage-regulating circuit; Wherein, described optocoupler feedback circuit comprises: optocoupler and the first resistance being connected in parallel with it; Described voltage stabilizing reference circuit comprises: voltage stabilizing standard, the first electric capacity and the second resistance; Described voltage sampling circuit comprises: the 3rd resistance and connected the 4th resistance; Described voltage-regulating circuit comprises: triode; The collector of described triode is connected with the 5th resistance, the base stage of described triode is connected with outside standby signal source, between described base stage and described standby signal source, be provided with the 6th resistance, the emitter of described triode is connected with ground, is provided with the 7th resistance between described emitter and base stage; Described optocoupler feedback circuit is connected with voltage stabilizing reference circuit, and described voltage stabilizing reference circuit is connected with described voltage sampling circuit, voltage-regulating circuit respectively.
Further, between the first pin of described voltage stabilizing standard and the 3rd pin, be connected with the first electric capacity and the second resistance, the first electric capacity and the second resistance are connected in series, and the second pin of described voltage stabilizing standard is connected with ground.
Further, between the emitter of described triode and base stage, be also connected in parallel to the second electric capacity.
Further, described optocoupler is that model is the optocoupler of PC817.
Further, described voltage stabilizing standard is that model is the voltage stabilizing standard of TL43.
Further, described triode is that model is the triode of MMBT4401,2N2222 or 2N7002.
Therefore a kind of circuit that improves stand-by power consumption that the utility model embodiment provides, comprising: optocoupler feedback circuit, voltage stabilizing reference circuit, voltage sampling circuit and voltage-regulating circuit.In the time that TV is converted to normal work from standby, the external standby signal source of voltage-regulating circuit is high level, makes triode conducting, make the 5th resistance access ground, be connected in parallel with the 3rd resistance, access voltage sampling circuit, diminishes the all-in resistance of voltage sampling circuit.Voltage stabilizing reference circuit gathers the voltage decreases of voltage sampling circuit, in order to maintain reference voltage (2.5V), the impedance of voltage stabilizing reference circuit increases, thereby the electric current of optocoupler feedback circuit is reduced, power management chip detects reducing of this electric current, the output voltage of the whole circuit of meeting rising, finally makes output voltage raise as 12V.And in the time that holding state is converted to normal work, standby signal source is low level, triode is turn-offed, the resistance of sampled voltage circuit is the 3rd resistance and the 5th resistance, it is large that the all-in resistance of sampled voltage circuit becomes.Voltage stabilizing reference circuit, in order to maintain reference voltage (2.5V), reduces its impedance, thereby the electric current of optocoupler feedback circuit is increased, and power management chip detects the increase of this electric current, can reduce the out-put supply of whole circuit, makes output voltage be adjusted into 7V.Visible, show that main control chip is in the time that standby is arrived in normal work, according to the feedback of standby signal, output voltage is first depressured to 7V from 12V automatically, then by other circuit, voltage is depressured to 5V from 7V.Directly by other circuit, output voltage is depressured to 5V from 12V than prior art, pressure reduction is 7V, the utility model circuit switches the output reference of primary power by standby signal, automatically adjust output voltage, make to be depressured to 5V from 7V in the time of standby, pressure reduction is 2V, can improve conversion efficiency, conversion power consumption while effectively reducing standby, thus stand-by power consumption reduced.
Accompanying drawing explanation
Fig. 1 is the syndeton schematic diagram of a kind of circuit that improves stand-by power consumption that the utility model provides;
Fig. 2 is the electrical block diagram of a kind of circuit that improves stand-by power consumption that the utility model provides.
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.
Referring to Fig. 1, Fig. 1 is the syndeton schematic diagram of a kind of circuit that improves stand-by power consumption that the utility model provides.This main circuit will comprise: optocoupler feedback circuit 101, voltage stabilizing reference circuit 102, voltage sampling circuit 103 and voltage-regulating circuit 104.Wherein, optocoupler feedback circuit 101 is connected with voltage stabilizing reference circuit 102, and voltage stabilizing reference circuit 102 is connected with voltage sampling circuit 103, voltage-regulating circuit 104 respectively.
In the present embodiment, optocoupler feedback circuit 101 is connected with outside power management chip.
Referring to Fig. 2, Fig. 2 is the electrical block diagram of a kind of circuit that improves stand-by power consumption that the utility model provides.Optocoupler feedback circuit 101 comprises: optocoupler PCB101A and the first resistance R B132 being connected in parallel with it.Voltage stabilizing reference circuit 102 comprises: voltage stabilizing standard UB102, the first capacitor C B109 and the second resistance R B133.Voltage sampling circuit 103 comprises: the 3rd resistance R B134 and connected the 4th resistance R B135.Voltage-regulating circuit 104 comprises: triode QB812.The collector C of triode QB812 is connected with the 5th resistance R B823, base stage B is connected with outside standby signal source P, between base stage B and standby signal source P, be provided with the 6th resistance R B824, be provided with the 7th resistance R B825 between emitter E and base stage B, emitter E is also connected with ground.
In the present embodiment, between the first pin of voltage stabilizing standard UB102 and the 3rd pin, be connected with the first capacitor C B109 and the second resistance R B133, this the first capacitor C B109 and the second resistance R B133 are connected in series, and the second pin of voltage stabilizing standard UB102 is connected with ground.
In the present embodiment, the 3rd resistance R B134 is connected between the first pin and the second pin of voltage stabilizing standard UB102, and the 4th resistance R B135 is connected between the first pin and outside 7V voltage source of voltage stabilizing standard UB102.
One as the present embodiment is given an example, and it is that model is the optocoupler of PC817 that optocoupler PCB101A can be, but not limited to.
One as the present embodiment is given an example, and it is that model is the voltage stabilizing standard of TL431 that voltage stabilizing standard UB102 can be, but not limited to
One as the present embodiment is given an example, and it is that model is the triode of MMBT4401,2N2222 or 2N7002 that triode QB812 can be, but not limited to.
Therefore a kind of circuit that improves stand-by power consumption that the utility model embodiment provides, comprising: optocoupler feedback circuit 101, voltage stabilizing reference circuit 102, voltage sampling circuit 103 and voltage-regulating circuit 104.In the time that TV is converted to normal work from standby, the external standby signal source P of voltage-regulating circuit 101 is high level, makes triode QB812 conducting, makes the 5th resistance R B823 ground connection, in parallel with the 3rd resistance R B134.Due to adding of the 5th resistance R B823, the voltage that voltage stabilizing reference circuit 102 gathers is the voltage sum that the voltage of the 4th resistance R B135 adds rear the 3rd resistance R B134 in parallel and the 5th resistance R B823, little when the voltage ratio standby of this collection, voltage stabilizing reference circuit 102 is in order to maintain reference voltage (2.5V), its impedance meeting increases, thereby the electric current of adjusting optocoupler feedback circuit 101 is reduced, after power management chip detects that this electric current reduces, meeting boosted output voltages, raises as 12V the output voltage of whole circuit.The amplitude that this output voltage raises is determined jointly by the 4th resistance R B135, the 3rd resistance R B134 and the 5th resistance R B823.And in the time that normal work is converted to holding state, standby signal source P is low level, triode QB812 is turn-offed, the voltage of the 3rd resistance R B134 and the 4th resistance R B135 in voltage stabilizing reference circuit 102 Direct Sampling voltage sampling circuits 103, large when the normal work of this sampled voltage ratio, voltage stabilizing reference circuit 102 is in order to maintain reference voltage (2.5V), its impedance meeting reduces, thereby the electric current of adjusting optocoupler feedback circuit 101 is increased, after power management chip detects that this circuit increases, can reduce output voltage, make the output voltage of whole circuit be adjusted into 7V.
Visible, show that main control chip is in the time that standby is arrived in normal work, according to the feedback of standby signal, output voltage is first depressured to 7V from 12V automatically, then by other circuit, voltage is depressured to 5V from 7V.Directly by other circuit, output voltage is depressured to 5V from 12V than prior art, pressure reduction is 7V, the utility model circuit switches the output reference of primary power by standby signal, automatically adjust output voltage, make to be depressured to 5V from 7V in the time of standby, pressure reduction is 2V, can improve conversion efficiency, conversion power consumption while effectively reducing standby, thus stand-by power consumption reduced.
The above is preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (6)
1. a circuit that improves stand-by power consumption, is characterized in that, comprising: optocoupler feedback circuit, voltage stabilizing reference circuit, voltage sampling circuit and voltage-regulating circuit;
Wherein, described optocoupler feedback circuit comprises: optocoupler and the first resistance being connected in parallel with it;
Described voltage stabilizing reference circuit comprises: voltage stabilizing standard, the first electric capacity and the second resistance;
Described voltage sampling circuit comprises: the 3rd resistance and connected the 4th resistance;
Described voltage-regulating circuit comprises: triode; The collector of described triode is connected with the 5th resistance, the base stage of described triode is connected with outside standby signal source, between described base stage and described standby signal source, be provided with the 6th resistance, the emitter of described triode is connected with ground, is provided with the 7th resistance between described emitter and base stage;
Described optocoupler feedback circuit is connected with voltage stabilizing reference circuit, and described voltage stabilizing reference circuit is connected with described voltage sampling circuit, voltage-regulating circuit respectively.
2. circuit according to claim 1, is characterized in that,
Between the first pin of described voltage stabilizing standard and the 3rd pin, be connected with the first electric capacity and the second resistance, the first electric capacity and the second resistance are connected in series, and the second pin of described voltage stabilizing standard is connected with ground.
3. circuit according to claim 1, is characterized in that,
Between the emitter of described triode and base stage, be also connected in parallel to the second electric capacity.
4. according to the arbitrary described circuit of claims 1 to 3, it is characterized in that,
Described optocoupler is that model is the optocoupler of PC817.
5. according to the arbitrary described circuit of claims 1 to 3, it is characterized in that,
Described voltage stabilizing standard is that model is the voltage stabilizing standard of TL431.
6. according to the arbitrary described circuit of claims 1 to 3, it is characterized in that,
Described triode is that model is the triode of MMBT4401,2N2222 or 2N7002.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420053656.5U CN203706002U (en) | 2014-01-27 | 2014-01-27 | Circuit for reducing standby power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420053656.5U CN203706002U (en) | 2014-01-27 | 2014-01-27 | Circuit for reducing standby power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203706002U true CN203706002U (en) | 2014-07-09 |
Family
ID=51056408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420053656.5U Expired - Lifetime CN203706002U (en) | 2014-01-27 | 2014-01-27 | Circuit for reducing standby power consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203706002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022199626A1 (en) * | 2021-03-23 | 2022-09-29 | 西安青松光电技术有限公司 | Power supply apparatus and electronic device |
| CN115313814A (en) * | 2022-09-03 | 2022-11-08 | 迈思普电子股份有限公司 | Simple output voltage conversion circuit |
-
2014
- 2014-01-27 CN CN201420053656.5U patent/CN203706002U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022199626A1 (en) * | 2021-03-23 | 2022-09-29 | 西安青松光电技术有限公司 | Power supply apparatus and electronic device |
| CN115313814A (en) * | 2022-09-03 | 2022-11-08 | 迈思普电子股份有限公司 | Simple output voltage conversion circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101576767B (en) | Main board power supply circuit | |
| CN201130780Y (en) | Intelligent electricity-saving socket | |
| CN101989812A (en) | Direct-current (DC) power supply conversion circuit and method | |
| CN103219893B (en) | Switch power controller and switching power circuit | |
| CN104698262A (en) | Zero cross detection circuit and variable frequency air conditioner | |
| CN103066690A (en) | Low-power-consumption standby circuit | |
| CN207926438U (en) | DC power supply | |
| CN103354690B (en) | Auxiliary-winding-free primary side controlled LED (light-emitting diode) driving circuit and PFC (power factor correction) constant-current control circuit thereof | |
| CN101635513B (en) | Stand-by circuit | |
| CN203706002U (en) | Circuit for reducing standby power consumption | |
| CN204556715U (en) | A kind of zero cross detection circuit and convertible frequency air-conditioner | |
| CN203225836U (en) | Zero power consumption standby circuit and display terminal | |
| CN104348251A (en) | Circuit for switching power supplies of external power source and lithium battery | |
| CN201039001Y (en) | A standby circuit for switch power | |
| CN201262819Y (en) | Liquid crystal television and sequence control circuit | |
| CN106655761B (en) | A kind of high gain boost DC converter | |
| CN203289074U (en) | Power supply direct-supply protection circuit and set-top box | |
| CN203233312U (en) | Switch power supply controller and switch power supply device | |
| CN106134501B (en) | A kind of multichannel output module power supply is lower electric sequential control circuit preferentially | |
| CN205901918U (en) | Fall and extinguish TV indicator lamp circuit and TV set behind electricity fast | |
| CN205249053U (en) | Television circuit board power supply line | |
| CN201263079Y (en) | Under-voltage protection circuit, power supply circuit and television set | |
| CN204360258U (en) | Reduce the power circuit of stand-by power consumption | |
| CN103683892A (en) | Switching power supply and controller thereof | |
| CN203261408U (en) | Single-path power supply device for main board and television main board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |
|
| CX01 | Expiry of patent term |