CN104301643A - Television LLC topology direct standby low-power-dissipation circuit - Google Patents
Television LLC topology direct standby low-power-dissipation circuit Download PDFInfo
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- CN104301643A CN104301643A CN201410486878.0A CN201410486878A CN104301643A CN 104301643 A CN104301643 A CN 104301643A CN 201410486878 A CN201410486878 A CN 201410486878A CN 104301643 A CN104301643 A CN 104301643A
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Abstract
The invention provides a television LLC topology direct standby low-power-dissipation circuit. The television LLC topology direct standby low-power-dissipation circuit comprises a frequency hopping control circuit used for controlling an LLC and a PFC; the frequency hopping control circuit comprises an optocoupler, the positive pole of the receiving end of the optocoupler is connected with a reference level, and the negative pole of the receiving end of the optocoupler outputs the frequency hopping control voltage; the negative pole of the transmitting end of the optocoupler is grounded, and the positive pole of the transmitting end of the optocoupler is connected with the output end of a television power source; a control circuit for controlling the frequency hopping control voltage through standby control signals is arranged between the positive pole of the transmitting end of the optocoupler and the output end of the television power source. By means of the method, the LLC topology direct standby low-power-dissipation requirement of the television power source can be achieved through a simple circuit. The topology structure of the television power source is greatly simplified, and cost is reduced.
Description
Technical field
The present invention relates to TV power supply technical field, particularly relate to a kind of television set LLC topology directly low-power consumption standby circuit.
Background technology
Along with LLC (Logical Link Control, logic link control) harmonic technology and PFC (Programmable Logic Controller, programmable logic controller (PLC)) development of technology, when present employing LLC resonance and PFC framework underloading, it is lower that power consumption can be done.When this technology is applied to field of television, there are problems.
Accomplish underloading low-power consumption, need the frequency range when underloading, the operating state of LLC being adjusted to high voltage gain, carry out discontinuous operation.And intermittently used frequency must be low.
From underloading to normal switching problem more complicated of carrying.Normally, need working load current detection circuit to realize, when load current increases to certain value, LLC jumps out discontinuous operation pattern immediately, and this mode cost is higher.As shown in Figure 1.This switching is that under solving discontinuous operation state, when load increases, intermittently used frequency can increase, and sends the problem compared with loud noise.
Summary of the invention
The object of the present invention is to provide a kind of television set LLC topology directly low-power consumption standby circuit, by the distinctive Control timing sequence of television set, then coordinate interlock circuit to realize LLC from underloading to normal switching of carrying.This circuit is simple, cost is low and better coordinate with operating conditions of TV set.
For solving the problem, the invention provides a kind of television set LLC topology directly low-power consumption standby circuit, comprise the frequency hopping control circuit for control LLC and PFC, frequency hopping control circuit comprises an optocoupler, the receiving terminal positive pole of optocoupler is connected with reference level, and the negative pole of optocoupler receiving terminal exports frequency hopping control voltage; The transmitting terminal minus earth of described optocoupler, positive pole connects TV power supply output; The control circuit of Opportunity awaiting control for linear signal controlling frequency hopping control voltage is provided with between the transmitting terminal positive pole of described optocoupler and TV power supply output.
Further, described control circuit comprises power supply and exports the 12V output level provided, and 12V output level one end connects TV power supply, and the other end connects optocoupler transmitting terminal positive pole; Described 12V output level carries out break-make control by Opportunity awaiting control for linear signal.
Further, between described 12V output level and optocoupler transmitting terminal positive pole, be provided with voltage-stabiliser tube and current-limiting resistance, voltage-stabiliser tube and current-limiting resistance series connection; The positive pole of described voltage-stabiliser tube connects 12V output level, and current-limiting resistance connects optocoupler transmitting terminal positive pole.
Further, described control circuit comprises a switching circuit, and one end of switching circuit connects TV power supply output, and the other end connects optocoupler transmitting terminal positive pole; Described switching circuit controls break-make by television standby control signal.
Further, the voltage stabilized range of described voltage-stabiliser tube is greater than 5.1V, is less than 11V.
Further, described reference level is by filter capacitor ground connection.
The present invention also provides a kind of low-power consumption TV, is provided with the television set LLC topology directly low-power consumption standby circuit as described in claim 1-6 arbitrary in TV.。
Compared with prior art, the invention provides a kind of television set LLC topology directly low-power consumption standby circuit, during TV standby, the power consumption of mainboard is lower, only has about 5V/40mA, when non-standby, mainboard can send an Opportunity awaiting control for linear signal to power panel, and now power panel will provide 12V to mainboard.Utilize this sequential, utilize the 12V voltage provided to mainboard to do LLC underloading to the normal switching controls voltage carried, simply effectively.The same Opportunity awaiting control for linear signal that utilizes does switching controls voltage, effectively simple too.By method of the present invention, can by simple circuit realiration TV set power LLC topology direct standby time low-power consumption requirement.Thus TV set power topological structure is simplified greatly, reduce cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of TV standby power supply of the prior art;
Fig. 2 is the electrical block diagram of the embodiment of the present invention one;
Fig. 3 is the electrical block diagram of the embodiment of the present invention two.
Embodiment
For making object of the present invention, feature becomes apparent, and be further described, but the present invention can realize by different forms, should not think and just be confined to described embodiment below in conjunction with accompanying drawing to the specific embodiment of the present invention.
Embodiment one
As shown in Figure 2, the present embodiment provides a kind of television set LLC topology directly low-power consumption standby circuit, and comprise the frequency hopping control circuit for control LLC and PFC, frequency hopping control circuit comprises an optocoupler U1, and the receiving terminal positive pole of optocoupler U1 is connected with reference level V1.Reference level V1 is positioned at primary side, provides level to optocoupler U1, ensures the transmission of signal.
The negative pole of optocoupler U1 receiving terminal exports frequency hopping control voltage V2, the transmitting terminal minus earth of optocoupler U1, and positive pole connects TV power supply output V3.Power supply exports the voltage of being everlasting for LLC topological power exports, and is generally about 12V.For follow-up mainboard provides level, provide input voltage for producing 5V standby voltage simultaneously.
The control circuit of Opportunity awaiting control for linear signal controlling frequency hopping control voltage is provided with between the transmitting terminal positive pole of optocoupler U1 and TV power supply output V3.
Described control circuit comprises power supply and exports the 12V output level V4 provided, and 12V output level V4 one end connects TV power supply, and the other end connects optocoupler U1 transmitting terminal positive pole; Described 12V output level V4 carries out break-make control by Opportunity awaiting control for linear signal L1.
Be provided with voltage-stabiliser tube VZ1 and current-limiting resistance R1 between described 12V output level V4 and optocoupler U1 transmitting terminal positive pole, voltage-stabiliser tube VZ1 and current-limiting resistance R1 connects; The positive pole of described voltage-stabiliser tube VZ1 connects 12V output level V4, and current-limiting resistance R1 connects optocoupler U1 transmitting terminal positive pole.
12V output level directly exports to mainboard, and this level is by the control of standby signal, and when standby signal is high, 12V output level exports, and when standby signal is low, 12V output level is closed.
The voltage stabilized range of described voltage-stabiliser tube is greater than 5.1V, is less than 11V.
Voltage-stabiliser tube is generally 5.1V or more, below 11V, when the existence of this voltage-stabiliser tube ensure that from normal condition to holding state, makes LLC enter discontinuous operation state as early as possible, prevents output level to waft height, thus avoids system to occur restarting phenomenon.
Described reference level is by filter capacitor C1 ground connection.
The operation principle of this embodiment is: when TV standby, now mainboard power consumption is very low, now mainboard provides standby signal to power supply (low level), power supply receives this signal and then cuts off 12V output, when 12V exports and cuts off, and 12V level continuous decrease, until voltage-stabiliser tube cut-off, optocoupler turns off, and now elementary frequency hopping control voltage is low, and LLC chip enters discontinuous operation state.
When television set from standby to non-standby time, now mainboard sends standby signal to power supply (high level), voltage receives this signal and opens 12V output, 12V level rises rapidly, until voltage-stabiliser tube conducting, optocoupler is opened, and now elementary frequency hopping control voltage is high, and LLC chip enters non-batch operating state.
Compared with prior art, the invention provides a kind of television set LLC topology directly low-power consumption standby circuit, during TV standby, the power consumption of mainboard is lower, only has about 5V/40mA, when non-standby, mainboard can send an Opportunity awaiting control for linear signal to power panel, and now power panel will provide 12V to mainboard.Utilize this sequential, utilize the 12V voltage provided to mainboard to do LLC underloading to the normal switching controls voltage carried, simply effectively.The same Opportunity awaiting control for linear signal that utilizes does switching controls voltage, effectively simple too.By method of the present invention, can by simple circuit realiration TV set power LLC topology direct standby time low-power consumption requirement.Thus TV set power topological structure is simplified greatly, reduce cost.
As a distortion of the present embodiment, the present invention also provides a kind of low-power consumption TV, is provided with as television set LLC topology described above directly low-power consumption standby circuit in TV.
Embodiment two
As shown in Figure 3, the difference of the present embodiment and embodiment one is: control circuit comprises a switching circuit L2, and one end of switching circuit L2 connects TV power supply output, and the other end connects optocoupler U1 transmitting terminal positive pole; Described switching circuit L2 controls break-make by television standby control signal.
The technical scheme of this enforcement is passed through the break-make of television standby control signal control switch and then controls closedown or the conducting of optocoupler, and circuit structure is simpler.
Obviously, those skilled in the art can carry out various change and modification to invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (7)
1. a television set LLC topology directly low-power consumption standby circuit, comprise the frequency hopping control circuit for control LLC and PFC, frequency hopping control circuit comprises an optocoupler, and the receiving terminal positive pole of optocoupler is connected with reference level, and the negative pole of optocoupler receiving terminal exports frequency hopping control voltage; The transmitting terminal minus earth of described optocoupler, positive pole connects TV power supply output, it is characterized in that: the control circuit being provided with Opportunity awaiting control for linear signal controlling frequency hopping control voltage between the transmitting terminal positive pole of described optocoupler and TV power supply output.
2. television set LLC topology as claimed in claim 1 directly low-power consumption standby circuit, it is characterized in that: described control circuit comprises TV power supply and exports the 12V output level provided, 12V output level one end connects TV power supply, and the other end connects optocoupler transmitting terminal positive pole; Described 12V output level carries out break-make control by Opportunity awaiting control for linear signal.
3. television set LLC topology as claimed in claim 2 directly low-power consumption standby circuit, is characterized in that: be provided with voltage-stabiliser tube and current-limiting resistance between described 12V output level and optocoupler transmitting terminal positive pole, voltage-stabiliser tube and current-limiting resistance series connection; The positive pole of described voltage-stabiliser tube connects 12V output level, and current-limiting resistance connects optocoupler transmitting terminal positive pole.
4. television set LLC topology as claimed in claim 1 directly low-power consumption standby circuit, it is characterized in that: described control circuit comprises a switching circuit, one end of switching circuit connects TV power supply output, and the other end connects optocoupler transmitting terminal positive pole; Described switching circuit controls break-make by television standby control signal.
5. television set LLC topology as claimed in claim 3 directly low-power consumption standby circuit, is characterized in that: the voltage stabilized range of described voltage-stabiliser tube is greater than 5.1V, is less than 11V.
6. television set LLC topology as claimed in claim 1 directly low-power consumption standby circuit, is characterized in that: described reference level is by filter capacitor ground connection.
7. a low-power consumption TV, is characterized in that: be provided with the television set LLC topology directly low-power consumption standby circuit as described in claim 1-6 arbitrary in TV.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410486878.0A CN104301643B (en) | 2014-09-22 | 2014-09-22 | A kind of television set LLC topology direct low-power consumption standby circuits |
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| CN201410486878.0A CN104301643B (en) | 2014-09-22 | 2014-09-22 | A kind of television set LLC topology direct low-power consumption standby circuits |
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| CN104301643B CN104301643B (en) | 2018-03-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105472281A (en) * | 2015-12-30 | 2016-04-06 | 歌尔声学股份有限公司 | Device standby circuit, television standby circuit and television |
| CN116088362A (en) * | 2022-11-01 | 2023-05-09 | 深圳市谷粒科技有限公司 | Device micro-power consumption intelligent control device, method, system and medium |
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| US20120007510A1 (en) * | 2010-07-07 | 2012-01-12 | Alex Horng | Control module with power supply detection and lamp utilizing the same |
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| CN104010148A (en) * | 2014-05-26 | 2014-08-27 | 深圳创维－Rgb电子有限公司 | Power circuit and television |
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| CN1564584A (en) * | 2004-03-26 | 2005-01-12 | 四川长虹电器股份有限公司 | Method and device for single tube reverse exciting power source for realizing low standby power loss |
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| CN105472281A (en) * | 2015-12-30 | 2016-04-06 | 歌尔声学股份有限公司 | Device standby circuit, television standby circuit and television |
| CN105472281B (en) * | 2015-12-30 | 2019-03-12 | 歌尔股份有限公司 | Device standby circuit, television standby circuit and TV |
| CN116088362A (en) * | 2022-11-01 | 2023-05-09 | 深圳市谷粒科技有限公司 | Device micro-power consumption intelligent control device, method, system and medium |
| CN116088362B (en) * | 2022-11-01 | 2023-09-01 | 深圳市谷粒科技有限公司 | Device micro-power consumption intelligent control device, method, system and medium |
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Inventor after: Pang Zhenhua Inventor after: Xu Hongfeng Inventor after: Dai Chunguang Inventor before: Pang Zhenhua |
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Effective date of registration: 20240513 Address after: 266104 No. 500, Songling Road, Laoshan District, Qingdao, Shandong Patentee after: GOERTEK TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 266061 floor 5, building 3, Guozhan wealth center, No. 18, Qinling Road, Laoshan District, Qingdao, Shandong Province Patentee before: QINGDAO GOERTEK TECHNOLOGY Co.,Ltd. Country or region before: China |
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