CN2894147Y - Standby regulating switching circuit for TV power supply - Google Patents
Standby regulating switching circuit for TV power supply Download PDFInfo
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- CN2894147Y CN2894147Y CN 200620080097 CN200620080097U CN2894147Y CN 2894147 Y CN2894147 Y CN 2894147Y CN 200620080097 CN200620080097 CN 200620080097 CN 200620080097 U CN200620080097 U CN 200620080097U CN 2894147 Y CN2894147 Y CN 2894147Y
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Abstract
This utility model discloses a standby adjusting and switching circuit of TV power supply which comprises an alternating current power supply and a transformer, the direct current voltage output terminal of which is connected with an adjusting and switching circuit. Through controlling the on-and-off states of the triode, which functions as the switching component, the adjusting and switching circuit can change the amount of the electric current flowing through the photo coupler, so as to ensure the stability of the output voltage of the switching power supply when the TV is in normal working condition. When the TV is in standby condition, the utility model is able to realize the effective switch of the power supply output voltage so that not only the standby power consumption is reduced greatly but also the stability of CPU supply voltage is kept. With a simple circuit structure and low cost, the utility model reaches the goal of low standby power consumption of TV, thus having great guiding significance on the designing of other circuit in the future.
Description
Technical field
The utility model relates to a kind of improvement of TV set circuit, and specifically, relate to a kind of output voltage and adjust switching TV set power, thus the control circuit of reduction stand-by power consumption.
Background technology
Development along with society, the usage quantity of household electrical appliance is huge day by day, existing household electrical appliances are after inserting charged socket to attaching plug, will be charged on the automatically controlled plate, generally all can there be transformer that high voltage is become low-voltage, low-voltage AC be become the use of low-voltage DC supply subsequent control circuit through rectification and filter circuit.Whether Switching Power Supply is the part of control circuit system, when having only the low-voltage direct control circuit charged always and in running order, could press by the perception mains switch, and this has the problem of stand-by power consumption with regard to having caused household electrical appliance.Along with the growth at full speed of household electrical appliances quantity, 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, electric power output voltage is reduced as far as possible, but must guarantee that also the supply power voltage of CPU is constant.At present, in most of power circuit, realize that the adjustment of output voltage needs the circuit of configuration structure complexity to be realized, equipment cost raises, reliability reduces thereby cause, and is unfavorable for the problem of product extensive use and popularization.
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 to adjust commutation 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:
Commutation circuit is adjusted in a kind of standby of TV set power, comprise AC power and transformer, at the secondary multi-channel DC voltage output end that includes of described transformer, comprising+B master control voltage output end with second dc voltage output end of working power is provided to CPU; Described second dc voltage output end connects the luminous end of optocoupler on the one hand through switching diode, and then through a three-terminal voltage regulator ground connection, the emitter that connects a NPN type triode on the other hand, the collector electrode of described NPN type triode connects first dc voltage output end of transformer, its base stage one tunnel connects described first dc voltage output end through resistance, another Lu Jingyi voltage stabilizing didoe ground connection; The reference voltage control end of described three-terminal voltage regulator is on the one hand through a divider resistance connection+B master control voltage output end, on the other hand through another divider resistance ground connection; The connected node of described two divider resistances connects described second dc voltage output end on the one hand, link to each other with the gating end of a controllable switch element on the other hand, another gating end ground connection of described controllable switch element, control end receives the control command signal of external circuit output.
As further qualification to technique scheme, described controllable switch element adopts a NPN type triode to realize, the base stage of described triode connects the control command signal output of external circuit, grounded emitter, and collector electrode connects the connected node of described two divider resistances through diode; Described second dc voltage output end connects the negative pole of a voltage stabilizing didoe through switching diode, and the positive pole of described voltage stabilizing didoe links to each other with the collector electrode of described NPN type triode.
As the further qualification again to technique scheme, the magnitude of voltage of described first dc voltage output end is higher than the magnitude of voltage of second dc voltage output end; Described control command signal is the high-low level signal that CPU or external switch circuit send; The light-receiving end of described optocoupler connects the control pin of primary.
Compared with prior art, advantage of the present utility model with good effect is: the utility model is connected by the dc voltage output end at transformer adjusts commutation circuit, when the television set operate as normal, power supply control sample circuit is adjusted the stability of maintained switch electric power output voltage; When the television set standby, realize effective switching of electric power output voltage, not only reduced the stand-by power consumption of television set significantly, and kept the stability of CPU supply power voltage, thereby reached the purpose of television set standby low-power consumption with simple circuit configuration, less cost, the design of other circuit is from now on used had bigger directive significance.
Description of drawings
Fig. 1 is the schematic diagram that commutation circuit is adjusted in the standby of TV set power in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
Among Fig. 1, V1, V2 and V-B+ are three dc voltage output ends of transformer, when the television set operate as normal, and V-B+ output master control voltage, generally very high, more than 100V.Output V2 produces V-cpu voltage through switching diode D1, and the voltage as to the CPU power supply is generally 5V.Output V1 is boost voltage or adopts existing voltage in the circuit, requires output to be higher than V-cpu voltage, for example adopts sound accompaniment output voltage 24V as V1.
On described three dc voltage output end V1, V2 and V-B+, be connected with one and adjust commutation circuit, in described adjustment commutation circuit, output V1 connects the collector electrode of NPN type triode Q1 on the one hand, the base stage that connects triode Q1 on the other hand through resistance R 1, the base stage of described triode Q1 is through voltage stabilizing didoe ZD1 ground connection, and emitter connects the negative pole of diode D1.Output V2 connects resistance R 2 through diode D1, and then luminous end and the three-terminal voltage regulator U2 ground connection of the optocoupler U1 through connecting.The light-receiving end of described optocoupler U1 connects the control pin of primary, and the reference voltage control end of three-terminal voltage regulator U2 is on the one hand through divider resistance R3 connection+B master control voltage output end V-B+, on the other hand through divider resistance R4 ground connection.Output V2 is through the negative pole of diode D1 connection voltage stabilizing didoe ZD2, and its positive pole on the one hand by the connected node of diode D2 connection two divider resistance R3, R4, connects the collector electrode of NPN type triode Q2 through resistance R 5 on the other hand; The grounded emitter of described triode Q2, base stage connects the control command signal output Control of external circuit, and described control command signal is the high-low level signal that CPU or external switch circuit send.
When the television set operate as normal, control signal Control is a high level, triode Q2 conducting, its c-e short circuit, output V2 is through diode D1 output V-cpu direct voltage, provide working power for CPU on the one hand, and arrive ground, give optocoupler U1 power supply by resistance R 2 on the other hand through voltage stabilizing didoe ZD2 and resistance R 5.Adjust the resistance of divider resistance R3 and R4, change the conducting degree of three-terminal voltage regulator U2, and then change the electric current that flows through optocoupler U1, thus the size of decision output voltage V-B+.At this moment, the voltage of output V-B+ is only determined by the resistance of resistance R 3, R4.Simultaneously, because the voltage of output V1 by the magnitude of voltage of choose reasonable voltage stabilizing didoe ZD1, makes its be utmost point of triode Q1 when operate as normal can not form turn-on condition greater than the voltage of V-cpu, thereby control triode Q1 ends.
When the television set standby, control signal Control is a low level, and triode Q2 ends, and its c-e opens circuit, voltage V-cpu arrives ground through voltage stabilizing didoe ZD2, resistance R 5, diode D2, resistance R 4, and then by the electric current of three-terminal voltage regulator U2 control by optocoupler U1.At this moment, each road output voltage of power supply is by voltage stabilizing didoe ZD2, resistance R 5, diode D2 and resistance R 4 decisions, and each road output voltage reduces.When voltage V-cpu is reduced to the be utmost point formation turn-on condition that makes triode Q1, triode Q1 conducting.At this moment, the voltage of output V2 has been reduced to cannot be to the current potential of CPU power supply, and therefore, the working power of CPU is changeed to be provided by triode Q1 by output V1, and each road output voltage of power circuit is controlled by V1.Because during operate as normal, the voltage of output V1 can be established very highly, voltage can reduce much when standby, thereby each road output voltage of power supply is reduced significantly, and then has realized the purpose of television set standby low-power consumption.
The utility model has been realized the adjustment significantly of television set output voltage by adopting above-mentioned simple circuit configuration, and has effectively kept the stability of CPU supply power voltage, has improved reliability of system operation.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 (5)
1. commutation circuit is adjusted in the standby of a TV set power, comprise AC power and transformer, at the secondary multi-channel DC voltage output end that includes of described transformer, comprising+B master control voltage output end (V-B+) with second dc voltage output end (V2) of working power is provided to CPU; It is characterized in that: described second dc voltage output end (V2) connects the luminous end of optocoupler (U1) on the one hand through switching diode (D1), and then through a three-terminal voltage regulator (U2) ground connection, the emitter that connects a NPN type triode (Q1) on the other hand, the collector electrode of described NPN type triode (Q1) connects first dc voltage output end (V1) of transformer, its base stage one tunnel connects described first dc voltage output end (V1), another Lu Jingyi voltage stabilizing didoe (ZD1) ground connection through resistance (R1); The reference voltage control end of described three-terminal voltage regulator (U2) is on the one hand through a divider resistance (R3) connection+B master control voltage output end (V-B+), on the other hand through another divider resistance (R4) ground connection; The connected node of described two divider resistances (R3, R4) connects described second dc voltage output end (V2) on the one hand, link to each other with the gating end of a controllable switch element on the other hand, another gating end ground connection of described controllable switch element, control end receives the control command signal of external circuit output.
2. commutation circuit is adjusted in the standby of TV set power according to claim 1, it is characterized in that: described controllable switch element adopts a NPN type triode (Q2) to realize, the base stage of described triode (Q2) connects the control command signal output (Control) of external circuit, grounded emitter, collector electrode connect the connected node of described two divider resistances (R3, R4) through diode (D2); Described second dc voltage output end (V2) is through the negative pole of switching diode (D1) connection one voltage stabilizing didoe (ZD2), and the positive pole of described voltage stabilizing didoe (ZD2) links to each other with the collector electrode of NPN type triode (Q2).
3. commutation circuit is adjusted in the standby of TV set power according to claim 3, and it is characterized in that: the magnitude of voltage of described first dc voltage output end (V1) is higher than the magnitude of voltage of second dc voltage output end (V2).
4. commutation circuit is adjusted in the standby of TV set power according to claim 3, and it is characterized in that: described control command signal is the high-low level signal that CPU or external switch circuit send.
5. commutation circuit is adjusted in the standby of TV set power according to claim 4, it is characterized in that: the light-receiving end of described optocoupler (U1) connects the control pin of primary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620080097 CN2894147Y (en) | 2006-01-10 | 2006-01-10 | Standby regulating switching circuit for TV power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620080097 CN2894147Y (en) | 2006-01-10 | 2006-01-10 | Standby regulating switching circuit for TV power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2894147Y true CN2894147Y (en) | 2007-04-25 |
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ID=38062295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620080097 Expired - Fee Related CN2894147Y (en) | 2006-01-10 | 2006-01-10 | Standby regulating switching circuit for TV power supply |
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| CN (1) | CN2894147Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355146A (en) * | 2011-09-02 | 2012-02-15 | 深圳和而泰智能控制股份有限公司 | Standby power control circuit and device |
| CN101552538B (en) * | 2008-12-19 | 2012-06-27 | 熊猫电子集团有限公司 | Switch power supply auxiliary output circuit |
| CN102594166A (en) * | 2012-01-17 | 2012-07-18 | 合肥美的荣事达电冰箱有限公司 | Control device and method for switch power supply, and switch power supply with control device |
-
2006
- 2006-01-10 CN CN 200620080097 patent/CN2894147Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552538B (en) * | 2008-12-19 | 2012-06-27 | 熊猫电子集团有限公司 | Switch power supply auxiliary output circuit |
| CN102355146A (en) * | 2011-09-02 | 2012-02-15 | 深圳和而泰智能控制股份有限公司 | Standby power control circuit and device |
| CN102594166A (en) * | 2012-01-17 | 2012-07-18 | 合肥美的荣事达电冰箱有限公司 | Control device and method for switch power supply, and switch power supply with control device |
| CN102594166B (en) * | 2012-01-17 | 2015-04-15 | 合肥美的电冰箱有限公司 | Control device and method for switch power supply, and switch power supply with control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070425 Termination date: 20100210 |