CN105281577A - Power amplifier power supply circuit and TV power strip - Google Patents
Power amplifier power supply circuit and TV power strip Download PDFInfo
- Publication number
- CN105281577A CN105281577A CN201510344458.3A CN201510344458A CN105281577A CN 105281577 A CN105281577 A CN 105281577A CN 201510344458 A CN201510344458 A CN 201510344458A CN 105281577 A CN105281577 A CN 105281577A
- Authority
- CN
- China
- Prior art keywords
- output
- power supply
- power amplifier
- supply circuits
- circuit
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention is suitable for the power supply field and provides a power amplifier power supply circuit and a TV power strip. The circuit is connected with an isolation driving and resonance circuit and an LED backlight control and output circuit in a coupled manner. The circuit comprises an alternating induction unit used for obtaining an alternating current from a common transformer of the isolation driving and resonance circuit and the LED backlight control and output circuit; a rectification unit used for rectifying the alternating current, wherein a first input end and a second input end are respectively connected with a first output end and a second output end of the alternating induction unit; an energy storage unit used for utilizing the alternating current for charging, wherein an input end of the energy storage unit is connected with an output end of the rectification unit, and an output end of the energy storage unit supplies electric energy to loads. According to the invention, windings are drawn from the transformer of the LED backlight control and output circuit for supplying power to a power amplifier, and an output reverse peak of the resonance circuit is small, so that a rectification diode relatively low in withstand voltage can be selected, the capacity of a filtering capacitor is reduced, a switching tube is simultaneously omitted; in addition, the high efficiency is ensured, the cost is effectively lowered, and the reliability is improved.
Description
Technical field
The invention belongs to field of power supplies, particularly relate to a kind of power amplifier power supply circuits and TV power panel.
Background technology
Existing 24VTV (television, TV) power panel power amplifier power supply circuits mainly go out to export through over commutation filtering after a winding by flyback is secondary, although the flyback that many group voltage exports is most effective can reach about 82%, but overall line architecture is too complicated, and design cost is high.
In addition, in order to coordinate the energy saving requirement of present society, when giving main board power supply, TV power panel needs to export with switching circuit shuts down to reduce standby power in the standby state, therefore need the metal-oxide-semiconductor selecting resistance to very high surge currents, but not only cost is high to select high pressure resistant metal-oxide-semiconductor, and still exists when multiple switching machine owing to impacting the risk causing device failure, reliability is poor, cannot meet the current market demand.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of power amplifier power supply circuits, and be intended to solve existing power supply plate power amplifier power supply circuits efficiency low, cost is high, the problem of poor reliability.
The embodiment of the present invention is achieved in that a kind of power amplifier power supply circuits, and with isolation drive and resonant circuit with LED-backlit controls and output circuit is of coupled connections, described power amplifier power supply circuits comprise:
Alternation sensing unit, for obtaining alternating current in the common transformer from isolation drive and resonant circuit and LED-backlit control and output circuit;
Rectification unit, for by described AC rectification, the first input end of described rectification unit, the second input are connected with the first output of described alternation sensing unit, the second output respectively;
Energy-storage units, for utilizing alternating current charging, the input of described energy-storage units is connected with the output of described rectification unit, and the output of described energy-storage units provides electric energy to load.
Another object of the embodiment of the present invention is, provides a kind of TV power panel adopting above-mentioned power amplifier power supply circuits.
The embodiment of the present invention is taken out a winding and is powered to power amplifier in the transformer LED-backlit control and output circuit, due to resonant circuit, to export reverse spike little, therefore rectifier diode can select withstand voltage lower pipe, and the capacity of filter capacitor can be reduced, save switching over metal-oxide-semiconductor simultaneously, ensureing high efficiency while, effectively reduce cost, improve reliability.
Accompanying drawing explanation
The structure chart of the power amplifier power supply circuits that Fig. 1 provides for the embodiment of the present invention;
The exemplary circuit structure chart of the power amplifier power supply circuits that Fig. 2 provides for the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each execution mode of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
It is that power amplifier is powered that the embodiment of the present invention extracts winding from the transformer of LED backlight control circuit, due to resonant circuit, to export reverse spike little, therefore can select withstand voltage lower rectifier diode, reduce the capacity of filter capacitor, save switching tube simultaneously, ensureing high efficiency while, effectively reduce cost, improve reliability.
Current large-sized TV power panel Shi Fenliangge department composition, one is that two is power to backlight LED to mainboard and T-CON plate power pack.
Backlight LED powers because power is large, so be all adopt resonance architectural schemes substantially, efficient and circuit simple, but waste resource a little to separately backlight power supply, therefore the embodiment of the present invention is taken out a winding and is powered to power amplifier in transformer backlight resonant circuit.
Below in conjunction with specific embodiment, realization of the present invention is described in detail:
Fig. 1 shows the structure of the power amplifier power supply circuits that the embodiment of the present invention provides, and for convenience of explanation, illustrate only part related to the present invention.
As one embodiment of the invention, these power amplifier power supply circuits 1 are with isolation drive and resonant circuit 2 and LED-backlit controls and output circuit 3 is of coupled connections,
These power amplifier power supply circuits 1 comprise:
Alternation sensing unit 11, for obtaining alternating current in the common transformer T2 from isolation drive and resonant circuit 2 and LED-backlit control and output circuit 3;
Rectification unit 12, for by AC rectification, the first input end of rectification unit 12, the second input are connected with the first output of alternation sensing unit 11, the second output respectively;
Energy-storage units 13, for utilizing alternating current charging, the input of energy-storage units 13 is connected with the output of rectification unit 12, and the output of energy-storage units 13 provides (+24V) electric energy to load.
The embodiment of the present invention is taken out a winding and is powered to power amplifier in the transformer T2 LED-backlit control and output circuit 3, owing to being resonant circuit, export reverse spike little, therefore rectifier diode D2, D3 can select the pipe of withstand voltage 150V, and the capacity of filter capacitor C1, C2 also can reduce, Simultaneous Switching switches metal-oxide-semiconductor and also can save, and effectively reduces cost.
Can expect, the embodiment of the present invention can also adopt Flyback configuration to realize, if take Flyback configuration rectifier diode need select the pipe of withstand voltage 400V.
Because the embodiment of the present invention adopts half-bridge resonance framework, therefore efficiency can reach more than 93%, in one-period diode D2 (upper half), diode D3 (lower half) in turn conducting be that electric capacity C1 charges, and corresponding circuit of reversed excitation can only one-period work half ripple.
Fig. 2 shows the exemplary circuit structure of the power amplifier power supply circuits that the embodiment of the present invention provides, and for convenience of explanation, illustrate only part related to the present invention.
Isolation drive and resonant circuit 2 form elementary overall architecture by switching tube Q1, switching tube Q4, the second transformer T2, electric capacity C8, and be aided with some resistance R1, R2, R4-R13, electric capacity C3, C4 realize, wherein T1 is isolation drive transformer, drive singal, by secondary generation, is coupled to through transformer T1 and elementaryly removes driving switch pipe Q1, switching tube Q4.
LED-backlit controls and output circuit 3 realizes controlling primarily of process chip U1 (BD9211F), and include the generation of drive singal, control and the LED of LED current voltage open the functions such as short-circuit protection.
As one embodiment of the invention, this alternation sensing unit 11 comprises:
First winding 1A and the second winding 2A;
First winding 1A and isolation drive and resonant circuit 2 and LED-backlit controls and the magnetic core sharing a transformer T2 of output circuit 3, the Same Name of Ends of the first winding 1A is the first output of alternation sensing unit 11, the different name end ground connection of the first winding 1A;
Second winding 2A and isolation drive and resonant circuit 2 and LED-backlit controls and the magnetic core sharing a transformer T2 of output circuit 3, the Same Name of Ends of the second winding 2A is the second output of alternation sensing unit 11, the different name end ground connection of the second winding 2A.
As one embodiment of the invention, this rectification unit 12 comprises:
Diode D2 and diode D3;
The anode of diode D2 is the first input end of rectification unit 12, and the negative electrode of diode D2 is that the output of rectification unit 12 is connected with the negative electrode of diode D3, and the anode of diode D3 is the second input of rectification unit 12.
As one embodiment of the invention, this energy-storage units 13 is electric capacity C1, and one end of electric capacity C1 is the output of energy-storage units 13, the other end ground connection of electric capacity C1.
Preferably, these power amplifier power supply circuits 1 also comprise resistance R3, and one end of resistance R3 is connected with the output of energy-storage units 13, the other end ground connection of resistance R3.
Preferably, these power amplifier power supply circuits 1 also comprise electric capacity C2, and one end of electric capacity C2 is connected with the output of energy-storage units 13, the other end ground connection of electric capacity C2.
Preferably, these power amplifier power supply circuits 1 also comprise an interface JP1, and this interface JP1 is connected with the output of energy-storage units 13.
The operation principle of power amplifier power supply circuits 1 is as follows:
When the switching tube Q1 conducting in isolation drive and resonant circuit 2, switching tube Q2 ends, electric current flows to transformer T2 through switching tube Q1, for resonant capacitance C8 charges, winding 1A can produce corresponding AC energy simultaneously, through diode D2 rectification, charge to electric capacity C1, electric capacity C1 provide energy to load;
When the switching tube Q1 in isolation drive and resonant circuit 2 ends, switching tube Q2 conducting, the electric energy that electric capacity C8 stores is through the armature winding of transformer T2, discharge over the ground through switching tube Q2 again, simultaneously winding 2A can produce corresponding electric energy and charges to electric capacity C1 through diode D3 rectification, the magnitude of voltage now exported is obtained by the turn ratio of control transformer T2, and the fluctuation of output voltage can control in the scope of 10%.
Resistance R3 is dummy load, to electric capacity C1 discharging function when can play stable output and shut down.
Another object of the embodiment of the present invention is, provides a kind of TV power panel adopting above-mentioned power amplifier power supply circuits.
The embodiment of the present invention is taken out a winding and is powered to power amplifier in the transformer T2 LED-backlit control and output circuit 3, owing to being resonant circuit, export reverse spike little, therefore rectifier diode can select the pipe of withstand voltage 150V, and the capacity of filter capacitor can be reduced, save switching over metal-oxide-semiconductor simultaneously, ensureing high efficiency while, effectively reduce cost, improve reliability.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. power amplifier power supply circuits, with isolation drive and resonant circuit with LED-backlit controls and output circuit is of coupled connections, it is characterized in that, described power amplifier power supply circuits comprise:
Alternation sensing unit, for obtaining alternating current in the common transformer from isolation drive and resonant circuit and LED-backlit control and output circuit;
Rectification unit, for by described AC rectification, the first input end of described rectification unit, the second input are connected with the first output of described alternation sensing unit, the second output respectively;
Energy-storage units, for utilizing alternating current charging, the input of described energy-storage units is connected with the output of described rectification unit, and the output of described energy-storage units provides electric energy to load.
2. power amplifier power supply circuits as claimed in claim 1, it is characterized in that, described alternation sensing unit comprises:
First winding and the second winding;
Described first winding and described isolation drive and resonant circuit and described LED-backlit controls and the magnetic core sharing a transformer of output circuit, the Same Name of Ends of described first winding is the first output of described alternation sensing unit, the different name end ground connection of described first winding;
Described second winding and described isolation drive and resonant circuit and described LED-backlit controls and the magnetic core sharing a transformer of output circuit, the Same Name of Ends of described second winding is the second output of described alternation sensing unit, the different name end ground connection of described second winding.
3. power amplifier power supply circuits as claimed in claim 1, it is characterized in that, described rectification unit comprises:
Diode D2 and diode D3;
The anode of described diode D2 is the first input end of described rectification unit, and the negative electrode of described diode D2 is that the output of described rectification unit is connected with the negative electrode of described diode D3, and the anode of described diode D3 is the second input of described rectification unit.
4. power amplifier power supply circuits as claimed in claim 1, it is characterized in that, described energy-storage units is electric capacity C1, and one end of described electric capacity C1 is the output of described energy-storage units, the other end ground connection of described electric capacity C1.
5. power amplifier power supply circuits as claimed in claim 1, it is characterized in that, described power amplifier power supply circuits also comprise resistance R3, and one end of described resistance R3 is connected with the output of described energy-storage units, the other end ground connection of described resistance R3.
6. power amplifier power supply circuits as claimed in claim 1, it is characterized in that, described power amplifier power supply circuits also comprise electric capacity C2, and one end of described electric capacity C2 is connected with the output of described energy-storage units, the other end ground connection of described electric capacity C2.
7. power amplifier power supply circuits as claimed in claim 1, it is characterized in that, described power amplifier power supply circuits also comprise an interface, and described interface is connected with the output of described energy-storage units.
8. a TV power panel, is characterized in that, described TV power panel comprises the power amplifier power supply circuits as described in any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510344458.3A CN105281577A (en) | 2015-06-19 | 2015-06-19 | Power amplifier power supply circuit and TV power strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510344458.3A CN105281577A (en) | 2015-06-19 | 2015-06-19 | Power amplifier power supply circuit and TV power strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105281577A true CN105281577A (en) | 2016-01-27 |
Family
ID=55150054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510344458.3A Pending CN105281577A (en) | 2015-06-19 | 2015-06-19 | Power amplifier power supply circuit and TV power strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105281577A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108932047A (en) * | 2018-06-26 | 2018-12-04 | 郑州云海信息技术有限公司 | A kind of isolation power supply board of GPU server |
| CN109935214A (en) * | 2019-04-24 | 2019-06-25 | 合肥惠科金扬科技有限公司 | A kind of backlight drive circuit and backlight drive device |
| CN110351925A (en) * | 2019-06-28 | 2019-10-18 | 林再福 | With efficient various colors LED light Shared Drive |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645653A (en) * | 2008-08-04 | 2010-02-10 | 深圳Tcl新技术有限公司 | LLC resonance circuit |
| CN102243850A (en) * | 2011-06-27 | 2011-11-16 | 青岛海信电器股份有限公司 | Backlight source driving circuit and driving circuit thereof as well as liquid crystal television |
| CN102932995A (en) * | 2012-11-06 | 2013-02-13 | 福建捷联电子有限公司 | Low-cost and high-efficiency light-emitting diode (LED) lamp string driving circuit |
| CN103096593A (en) * | 2012-11-19 | 2013-05-08 | 青岛海信电器股份有限公司 | Light-emitting diode (LED) backlight driving circuit and liquid crystal television |
| CN203289702U (en) * | 2013-05-16 | 2013-11-13 | 深圳创维－Rgb电子有限公司 | A backlight power supply circuit, a power supply apparatus, and a television set |
| CN204733079U (en) * | 2015-06-19 | 2015-10-28 | 惠科电子（深圳）有限公司 | A kind of power amplifier power supply circuits and TV power panel |
-
2015
- 2015-06-19 CN CN201510344458.3A patent/CN105281577A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645653A (en) * | 2008-08-04 | 2010-02-10 | 深圳Tcl新技术有限公司 | LLC resonance circuit |
| CN102243850A (en) * | 2011-06-27 | 2011-11-16 | 青岛海信电器股份有限公司 | Backlight source driving circuit and driving circuit thereof as well as liquid crystal television |
| CN102932995A (en) * | 2012-11-06 | 2013-02-13 | 福建捷联电子有限公司 | Low-cost and high-efficiency light-emitting diode (LED) lamp string driving circuit |
| CN103096593A (en) * | 2012-11-19 | 2013-05-08 | 青岛海信电器股份有限公司 | Light-emitting diode (LED) backlight driving circuit and liquid crystal television |
| CN203289702U (en) * | 2013-05-16 | 2013-11-13 | 深圳创维－Rgb电子有限公司 | A backlight power supply circuit, a power supply apparatus, and a television set |
| CN204733079U (en) * | 2015-06-19 | 2015-10-28 | 惠科电子（深圳）有限公司 | A kind of power amplifier power supply circuits and TV power panel |
Non-Patent Citations (1)
| Title |
|---|
| 孙铁瑞主编: "《一种液晶彩电电源板维修快易通 第3版》", 31 May 2014, 机械工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108932047A (en) * | 2018-06-26 | 2018-12-04 | 郑州云海信息技术有限公司 | A kind of isolation power supply board of GPU server |
| CN109935214A (en) * | 2019-04-24 | 2019-06-25 | 合肥惠科金扬科技有限公司 | A kind of backlight drive circuit and backlight drive device |
| CN109935214B (en) * | 2019-04-24 | 2023-10-20 | 合肥惠科金扬科技有限公司 | Backlight driving circuit and backlight driving device |
| CN110351925A (en) * | 2019-06-28 | 2019-10-18 | 林再福 | With efficient various colors LED light Shared Drive |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101136584B (en) | Switch loss reduced single-stage power factor correcting circuit | |
| CN103187876A (en) | DC/DC circuit for UPS | |
| CN103312178B (en) | A kind of two-way DC/DC changer and apply its battery detection equipment | |
| CN101645653B (en) | LLC resonance circuit | |
| CN102281006A (en) | Novel three-level soft switching converter | |
| CN101202461A (en) | Main circuit structure for changing storage battery into charge and discharge | |
| CN204733079U (en) | A kind of power amplifier power supply circuits and TV power panel | |
| CN100505487C (en) | Single-level power factor correction converter circuit | |
| CN105281577A (en) | Power amplifier power supply circuit and TV power strip | |
| CN106026678B (en) | A kind of reversible transducer | |
| CN105720826A (en) | Hybrid bridge type double-voltage rectification and output parallel single-stage inverter | |
| CN215186536U (en) | Motor controller and motor using same | |
| CN102364742B (en) | Storage battery formation processing charging and discharging main circuit structure | |
| CN201312262Y (en) | High-frequency switch power supply with higher conversion efficiency | |
| CN202435269U (en) | Auxiliary power circuit of mid-voltage converter and mid-voltage converter | |
| CN104780692A (en) | Single-stage non-bridge LED driving circuit integrated by double Boost and Flyback | |
| CN101924481B (en) | PFC (Power Factor Correction) rectifier circuit | |
| CN104822211A (en) | High-reliability LED illuminating device | |
| CN205123617U (en) | DCAC conversion equipment , DCDC conversion equipment and constant current drive device | |
| CN102761266A (en) | High-power switching power supply circuit with multiple outputs | |
| CN105171187A (en) | Electric welding machine with adjustable no-load voltage | |
| CN106787706B (en) | Coupling inductor hybrid lifting converter | |
| CN201263128Y (en) | Power supply control loop for washing machine | |
| CN201118255Y (en) | Accumulator formation charging-discharging main circuit structure | |
| CN104638946A (en) | Dual-winding transformer primary-side detection output voltage AC-DC converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 518000 Guangdong city of Shenzhen province Baoan District Shiyan street water Tamura Private Industrial Park Industrial Park, building 1 HKC 2, 3 Applicant after: Aucan Limited by Share Ltd Address before: 518000 Guangdong city of Shenzhen province Baoan District Shiyan street water Tamura Private Industrial Park Industrial Park, building 1 HKC 2, 3 Applicant before: HKC Electronic (Shenzhen) Co., Ltd. |
|
| COR | Change of bibliographic data | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160127 |