WO2020133991A1 - 一种电视电源驱动装置和电视机 - Google Patents

一种电视电源驱动装置和电视机 Download PDF

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Publication number
WO2020133991A1
WO2020133991A1 PCT/CN2019/093521 CN2019093521W WO2020133991A1 WO 2020133991 A1 WO2020133991 A1 WO 2020133991A1 CN 2019093521 W CN2019093521 W CN 2019093521W WO 2020133991 A1 WO2020133991 A1 WO 2020133991A1
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Prior art keywords
module
power supply
resonance
resistor
transformer
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PCT/CN2019/093521
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English (en)
French (fr)
Inventor
胡向峰
鲍晓杰
沈思宽
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深圳创维－Rgb电子有限公司
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Application filed by 深圳创维－Rgb电子有限公司 filed Critical 深圳创维－Rgb电子有限公司
Priority to US16/961,208 priority Critical patent/US11115618B2/en
Priority to EP19905462.8A priority patent/EP3726833B1/en
Publication of WO2020133991A1 publication Critical patent/WO2020133991A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • 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
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present disclosure relates to the technical field of electrical power supply, in particular to a television power supply driving device and a television.
  • EMI circuit In the traditional large-size LED TV power supply system, EMI circuit, PFC circuit (power factor correction circuit), high-current output LLC resonant circuit for backlight module power supply plus separate synchronous rectifier circuit, LLC for motherboard power supply are usually used Resonance circuit and separate standby circuit, but the existing power supply system contains a separate standby circuit, which makes the system more complicated, more devices, higher cost, occupying a larger PCB area, which is not conducive to the miniaturization and low power supply of large size
  • some power supplies currently use a flyback circuit to power the motherboard to save the standby circuit.
  • the use of a flyback circuit makes the power supply efficiency lower and the heat sink larger, which is not conducive to the heat dissipation of high-power TV power supplies.
  • the purpose of the present disclosure is to provide a TV power supply driving device and a TV set.
  • the simplified The power supply architecture also avoids the problems of power supply efficiency and limited heat dissipation.
  • a TV power supply driving device includes a power board connected to a main board and a backlight module, the power board is provided with a PFC circuit, the power board is also provided with an auxiliary power supply for powering the main board, and a power supply for the backlight module
  • the main power supply; the auxiliary power supply includes a first LLC resonance module, resonance control module, standby control module, power supply module and rectification filter module; the main power supply includes a second LLC resonance module, secondary LLC control module and synchronous rectification module ;
  • the standby control module controls the power supply module to turn on the resonance control module and the PFC circuit successively when receiving the power-on signal, and the PFC circuit outputs the PFC voltage to the first LLC resonance module and the second LLC resonance module.
  • An LLC resonance module converts the PFC voltage into a first voltage and a second voltage according to the first control signal output by the resonance control module, and after rectification and filtering by the rectification and filtering module, respectively output to the main board and the secondary LLC control module for power supply.
  • the second LLC resonant module converts the PFC voltage into a third voltage according to the secondary LLC control module outputting a second control signal, and then performs synchronous rectification by the synchronous rectification module to output power to the backlight module; the standby control When the module receives the standby signal, it controls the power supply module to turn off the PFC circuit to stop outputting the PFC voltage, so that the resonance control module enters the standby state.
  • the main power supply further includes a drive isolation module, and the drive isolation module isolates and outputs the second control signal output by the secondary LLC control module to the second LLC resonance module.
  • the main power supply further includes a current detection module, which detects the current of the second LLC resonance module and outputs a current feedback signal to the secondary LLC control module, the secondary LLC The control module adjusts the second control signal according to the current feedback signal.
  • the resonance control module includes a pre-start unit, a resonance control unit and a feedback unit;
  • the pre-start unit provides a pre-start voltage for the resonance control unit after power-on, and the resonance control unit is turned on Output a first control signal to the first LLC resonance module;
  • the feedback unit performs voltage detection on the first voltage and the second voltage and outputs a voltage feedback signal to the resonance control unit, the resonance control unit according to the The voltage feedback signal regulates the first control signal.
  • the standby control module includes a signal detection unit and an output control unit; the signal detection unit outputs a first level to the output control unit when a power-on signal is detected, and when a standby signal is detected Output a second level to the output control unit; the output control unit controls the power supply module to turn on the resonance control module and the PFC circuit successively when receiving the first level, and controls the power supply module to turn off the PFC when receiving the second level Circuit.
  • the pre-start unit includes a first diode and a first resistor
  • the resonance control unit includes a first resonance controller
  • the anode of the first diode is connected to the EMI
  • the output terminal of the filter circuit, the negative electrode of the first diode is connected to the HV signal terminal of the first resonance controller through the first resistor;
  • the HO signal terminal, LO signal terminal and HB signal of the first resonance controller Is connected to the first LLC resonant module,
  • the FB signal terminal of the first resonant controller is connected to the feedback unit, and the VCC terminal of the first resonant controller is connected to the power supply module;
  • the feedback unit is also connected to the Describe the output of the rectifier filter module.
  • the signal detection unit includes a second resistor, a third resistor, a first capacitor, and a triode;
  • the output control unit includes an optical coupler, and one end of the second resistor is connected to an on/standby signal
  • the other end of the second resistor is connected to one end of the third resistor, one end of the first capacitor and the base of the triode;
  • the other end of the third resistor, the other end of the first capacitor and the emitter of the triode are both Ground;
  • the collector of the triode is connected to the second end of the optocoupler;
  • the first end of the optocoupler is the second voltage output terminal, and the third and fourth ends of the optocoupler are both connected to the power supply module .
  • the first LLC resonance module includes a fourth resistor, a fifth resistor, a first MOS tube, a second MOS tube, a second capacitor, a third capacitor, a second diode, and a first A transformer
  • the rectifying and filtering module includes a first rectifying and filtering unit and a second rectifying and filtering unit; one end of the fourth resistor is connected to the HO signal terminal of the first resonance controller, and the other end of the fourth resistor is connected The gate of the first MOS tube; one end of the fifth resistor is connected to the LO signal terminal of the first resonance controller, and the other end of the fifth resistor is connected to the gate of the first MOS tube;
  • the drain of the first MOS tube is connected to the output terminal of the PFC circuit, the source of the first MOS tube is connected to the drain of the second MOS tube, the HB signal terminal of the first resonance controller, and the first terminal of the first transformer
  • the source of the second MOS tube is grounded; one end of the second capacitor is connected to the first MO
  • the secondary LLC control module includes a second resonance controller and a switch
  • the drive isolation module includes a drive transformer, a sixth resistor, and a fourth capacitor; one end of the sixth resistor Connected to the PLH signal terminal of the second resonance controller, the other end of the sixth resistor is connected to the sixth terminal of the drive transformer; one end of the fourth capacitor is connected to the PLL signal terminal of the second resonance controller , The other end of the fourth capacitor is connected to the seventh end of the drive transformer; the first, second, and fifth ends of the drive transformer are all connected to the second LLC resonant module; the second resonance
  • the power supply terminal of the controller is connected to the on/standby signal input terminal and the second voltage output terminal through the switch, and the BCS signal terminal and the BICS signal terminal of the second resonance controller are connected to the current detection module, the first Both the SLH signal terminal and the SLL signal terminal of the second resonance controller are connected to the synchronous rectification module.
  • the second LLC resonance module includes a seventh resistor, an eighth resistor, a third MOS tube, a fourth MOS tube, a fifth capacitor, a second transformer, and a current transformer; the first One end of the seven resistors is connected to the first end of the driving transformer, the other end of the seventh resistor is connected to the gate of the third MOS tube; one end of the eighth resistor is connected to the fifth end of the driving transformer, The other end of the eighth resistor is connected to the gate of the fourth MOS tube; the drain of the third MOS tube is connected to the output end of the PFC circuit, and the source of the third MOS tube is connected to the fourth MOS tube The drain, the second end of the driving transformer and the first end of the second transformer; the source of the fourth MOS tube is grounded; the fourth end of the second transformer is connected to the third end and the third end of the current transformer At the fourth end, the fifth and sixth ends of the second transformer are connected to the drain of the sixth MOS transistor M6, and the seventh and eighth ends
  • the current detection module includes a ninth resistor, a tenth resistor, an eleventh resistor, and a sixth capacitor; one end of the ninth resistor and one end of the sixth capacitor are connected to the The seventh end of the current transformer and one end of the tenth resistance, the other end of the ninth resistance is connected to the BICS signal end of the second resonance controller; the other end of the tenth resistance is connected to the second resonance
  • the BSC signal terminal of the controller and one end of the eleventh resistor, the other end of the sixth capacitor and the other end of the eleventh resistor are both grounded.
  • the synchronous rectification module includes a fifth MOS tube and a sixth MOS tube, the gate of the fifth MOS tube is connected to the SLH signal terminal of the second resonance controller, the first The drain of the fifth MOS tube is connected to the 7th and 8th ends of the second transformer, the gate of the sixth MOS tube is connected to the SLL signal terminal of the second resonance controller, and the The drain is connected to the fifth and sixth ends of the second transformer, and the source of the fifth MOS tube and the source of the sixth MOS tube are both grounded.
  • the main power supply further includes a seventh capacitor, the positive electrode of the seventh capacitor is connected to the third voltage output terminal, the ninth terminal, the tenth terminal, and the eleventh terminal of the second transformer And the twelfth end, the negative electrode of the seventh capacitor is grounded.
  • the model of the first resonance controller is FA6A31N.
  • a TV set includes the TV power drive device as described above.
  • the television power supply device includes a power board connected to the main board and the backlight module, and the power board is provided with a PFC circuit.
  • the power board is also provided with an auxiliary power supply for the main board and a main power supply for the backlight module;
  • the auxiliary power supply includes a first LLC resonance module, a resonance control module, a standby control module, a power supply module, and a rectifier filter module;
  • the main power supply includes a second LLC resonance module, a secondary LLC control module and a synchronous rectification module.
  • the standby control module controls the power supply module to turn on the resonance control module and the PFC circuit successively when receiving the power-on signal, and the PFC circuit outputs the PFC voltage to the first LLC resonance module and the second LLC resonance module.
  • An LLC resonance module converts the PFC voltage into a first voltage and a second voltage according to the first control signal output by the resonance control module, and after rectification and filtering by the rectification and filtering module, respectively output to the main board and the secondary LLC control module for power supply.
  • the second LLC resonant module converts the PFC voltage into a third voltage according to the secondary LLC control module outputting a second control signal, and then performs synchronous rectification by the synchronous rectification module to output power to the backlight module; the standby control When the module receives the standby signal, it controls the power supply module to turn off the PFC circuit to stop outputting the PFC voltage, so that the resonance control module enters the standby state.
  • FIG. 1 is a structural block diagram of a television power supply driving device provided by the present disclosure
  • FIG. 2 is a circuit diagram of an auxiliary power supply in a television power supply device provided by the present disclosure
  • FIG. 3 is a circuit diagram of a main power supply in a television power supply device provided by the present disclosure.
  • the present disclosure provides a television power supply driving device and a television set.
  • the power supply structure is simplified while the power supply efficiency and heat dissipation restrictions are avoided. The problem.
  • the TV power supply device includes a power board connected to a main board and a backlight module.
  • the power board is provided with an EMI filter circuit 1, a rectifier circuit 2 and a PFC circuit 3, and is also provided with a main board
  • the auxiliary power supply 10 includes a first LLC resonance module 11, a resonance control module 12, and a standby control module 13.
  • the main power supply 20 includes a second LLC resonance module 21, a secondary LLC control module 22, and a synchronous rectification module 23.
  • the EMI filter circuit 1, the rectifier circuit 2 and the PFC circuit 3 are connected in sequence, the EMI filter module is also connected to the resonance control module 12, the resonance control module 12, the first LLC resonance module 11 and the rectification filter module 15 are in sequence Connection, the PFC circuit 3 connects the first LLC resonance module 11 and the second LLC resonance module 21, the power supply module 14 connects the standby control module 13, the PFC circuit 3 and the resonance control module 12, the secondary The LLC control module 22 is connected to the rectification and filtering module 15, the synchronous rectification module 23 and the second LLC resonance module 21, and the second LLC resonance module 21 is connected to the synchronous rectification module 23.
  • the standby control module 13 controls the power supply module 14 to turn on the resonance control module 12 and the PFC circuit 3 successively after receiving the power-on signal, and the input AC power is filtered and rectified by the EMI filter circuit 1 and the rectified current
  • the PFC circuit 3 outputs the PFC voltage to the first LLC resonant module 11 and the second LLC resonant module 21.
  • the EMI filter circuit 1, the rectifier circuit 2 and the PFC circuit 3 are all existing technologies and can be used The existing mature circuit is implemented, and its structure and connection relationship will not be repeated here.
  • the resonance control module 12 After the resonance control module 12 starts to work, it will output a first control signal to the first LLC resonance module 11, and the first LLC resonance module 11 converts the PFC voltage to the first control signal output by the resonance control module 12
  • the first voltage (Vout2 in this embodiment) and the second voltage (+12V in this embodiment) are rectified and filtered by the rectifier filter module 15 and then output to the main board and the secondary LLC control module 22 for power supply, that is, when turned on
  • the first LLC resonance module 11 performs voltage conversion according to the first control signal, converts the PFC voltage to the first voltage Vout2 and outputs it to the main board, and converts the PFC voltage to
  • the second voltage +12V is output to the secondary LLC control module 22, the secondary LLC control module 22 is turned on, so that the secondary LLC control module 22 outputs a second control signal to the second LLC resonance module 21, and the second The two LLC resonant module 21 converts the PFC voltage to a third voltage (Vout1 in this embodiment) according to the second control
  • the power-on and power-on process is completed. Due to the LLC architecture used by the main power supply 20 and the auxiliary power supply 10, the voltage efficiency is effectively improved, and the problems of heat dissipation of the flyback circuit and limited efficiency are not generated. The power output output adjustment rate is better, and the application More flexible.
  • the standby control module 13 controls the power supply module 14 to close the PFC circuit 3 to stop outputting the PFC voltage when receiving the standby signal, so that the resonance control module 12 enters a standby state, that is, when the standby control module 13 receives
  • the power supply module 14 is controlled to stop supplying power to the PFC circuit 3, and only to supply power to the resonance control module 12.
  • the PFC circuit 3 stops outputting the PFC voltage
  • the first LLC resonance module 11 stops outputting the second voltage to the secondary
  • the LLC control module 22 causes the secondary LLC control module 22 to stop working, and then causes the second LLC resonance module 21 to stop outputting the third voltage to the backlight module, the screen goes out, and the resonance control module 12 enters a standby state, waiting for the reception to be turned on
  • the resonance control module 12 enters a standby state, waiting for the reception to be turned on
  • the entire system enters the power-on state and then lights up the screen.
  • the TV power supply device provided by the present disclosure can meet the power supply requirements of the motherboard by adopting the LLC oscillation structure in the auxiliary power supply 10, and can also be used as a standby power supply, eliminating the need for a separate standby circuit and meeting the needs of low standby power consumption At the same time, it also simplifies the structure of high-power power supply and saves system cost.
  • the main power supply 20 further includes a drive isolation module 24, the drive isolation module 24 is connected to the secondary LLC control module 22 and the second LLC resonance module 21, and the secondary LLC is controlled by the drive isolation module 24
  • the second control signal output by the module 22 is isolated and output to the second LLC resonant module 21.
  • the main power supply 20 sets the high-power LLC control to the secondary output of the second LLC resonant module 21 and isolates it by driving
  • the module 24 outputs the second control signal to the second LLC resonant module 21 in an isolated driving manner to drive the second LLC resonant module 21 to work, which effectively reduces the risk of damage to the controller at the primary stage and improves the overall reliability of the power supply Sex.
  • the main power supply 20 further includes a current detection module 25, the current detection module 25 is connected to the secondary LLC control module 22 and the second LLC resonance module 21, and the second LLC is detected by the current detection module 25
  • the current of the resonance module 21 outputs a current feedback signal to the secondary LLC control module 22, and the secondary LLC control module 22 adjusts the second control signal according to the current feedback signal.
  • the current detection module 25 detects the current of the resonant network in the main power supply 20 and feeds it back to the secondary LLC control module 22, so that the secondary LLC control module 22 can adjust the second control signal according to the current feedback signal. LLC resonant loop output power control and protection.
  • the resonance control module 12 includes a pre-start unit 121, a resonance control unit 122, and a feedback unit 123.
  • the pre-start unit 121 connects the EMI filter circuit 1 and the resonance control unit 122.
  • the resonance control unit 122 is connected to the power supply module 14 and the feedback unit 123, and the feedback unit 123 is also connected to the first voltage output terminal and the second voltage output terminal; wherein, after power-on, the pre-start unit 121 controls resonance
  • the unit 122 provides a pre-start voltage, and after the resonance control unit 122 is turned on, it outputs a first control signal to the first LLC resonance module 11; the feedback unit 123 performs voltage detection on the first voltage and the second voltage and outputs The voltage feedback signal is sent to the resonance control unit 122.
  • the resonance control unit 122 adjusts the first control signal according to the voltage feedback signal.
  • the feedback unit 123 may use an existing voltage detection feedback circuit. limited.
  • the input AC power is first filtered by the EMI filter circuit 1 to provide a pre-start unit 121 for the resonance control unit 122 to start the resonance control unit 122, and then the standby control module 13 receives the power-on signal
  • the resonance control unit 122 turns on and works normally to output a first control signal to the first LLC resonance module 11 to control the first LLC resonance
  • the module 11 performs voltage conversion.
  • the feedback unit 123 performs voltage detection feedback, so that the resonance control unit 122 can adjust the first control signal according to the voltage detection result to realize the closed loop of the LLC resonance loop. Control, maintain the stability of the output voltage, improve the stability and reliability of the power supply.
  • the standby control module 13 includes a signal detection unit 131 and an output control unit 132, the signal detection unit 131 is connected to the on/standby signal input terminal STB and the output control unit 132, and the output control unit 132 is also connected
  • the signal detection unit 131 outputs a first level to the output control unit 132 when a power-on signal is detected, and outputs a second level to the output control unit 132 when a standby signal is detected;
  • the output control The unit 132 controls the power supply module 14 to turn on the resonance control module 12 and the PFC circuit 3 successively when receiving the first level, and controls the power supply module 14 to turn off the PFC circuit 3 when receiving the second level.
  • the signal detection unit 131 receives the power-on signal and the standby signal, and then the output control unit 132 controls the power supply module 14 to implement the corresponding power supply operation, so that the auxiliary power supply 10 meets the power supply requirements of the motherboard At the same time, it can also be used as a standby power supply, eliminating the need for a separate standby circuit, effectively simplifying the power supply structure and saving system costs.
  • the pre-start unit 121 includes a first diode D1 and a first resistor
  • the resonance control unit 122 includes a first resonance controller U1; the first diode D1 Is connected to the output terminal of the EMI filter circuit 1, and the negative electrode of the first diode D1 is connected to the HV signal terminal of the first resonance controller U1 through the first resistor;
  • the HO signal terminal, the LO signal terminal and the HB signal terminal are connected to the first LLC resonance module 11,
  • the FB signal terminal of the first resonance controller U1 is connected to the feedback unit 123, and the VCC of the first resonance controller U1 Is connected to the power supply module 14;
  • the feedback unit 123 is also connected to the output end of the rectification and filtering module 15.
  • the input AC power is filtered by the EMI filter circuit 1 and then rectified and output to the HV signal terminal of the first resonance controller U1 through the first diode D1.
  • the high-voltage pre-start voltage realizes the first resonance controller U1.
  • Start up when receiving the power-on signal, it will output DC low-voltage VCC power supply through the power supply module 14 without having to maintain the high-voltage power supply to reduce the power consumption as much as possible.
  • the first resonance controller U1 After the first resonance controller U1 starts working, it outputs the upper tube drive signals HO and The lower tube driving signal LO drives the operation of the first LLC resonant module 11 to convert the voltage and output energy in the secondary.
  • the first resonant controller U1 may use a control chip of type FA6A31N, of course In other embodiments, other resonant controllers having the same function may also be used, which is not limited in this disclosure.
  • the signal detection unit 131 includes a second resistor R2, a third resistor R3, a first capacitor C1C1, and a transistor Q1;
  • the output control unit 132 includes an optocoupler U2, and one end of the second resistor R2 is connected to Standby signal input terminal, the other end of the second resistor R2 is connected to one end of the third resistor R3, one end of the first capacitor C1C1 and the base of the transistor Q1; the other end of the third resistor R3, the first capacitor C1C1 The other end and the emitter of the transistor Q1 are both grounded; the collector of the transistor Q1 is connected to the second end of the optocoupler U2; the second voltage output end of the first end of the optocoupler U2, the optocoupler U2 Both the third end and the fourth end are connected to the power supply module 14.
  • the first LLC resonance module 11 includes a fourth resistor R4, a fifth resistor R5, a first MOS transistor M1, a second MOS transistor M2, a second capacitor C2, a third capacitor C3, a second diode D2 and a first Transformer T1
  • the rectifying and filtering module 15 includes a first rectifying and filtering unit 151 and a second rectifying and filtering unit 152; one end of the fourth resistor R4 is connected to the HO signal terminal of the first resonance controller U1, the fourth The other end of the resistor R4 is connected to the gate of the first MOS transistor M1; one end of the fifth resistor R5 is connected to the LO signal terminal of the first resonant controller U1, and the other end of the fifth resistor R5 is connected to the The gate of the first MOS tube M1; the drain of the first MOS tube M1 is connected to the output terminal of the PFC circuit 3, the source of the first MOS tube M1 is connected to the drain of the second MOS tube M2, the first The HB signal terminal of
  • the power supply module 14 when the power is turned on, controls the VCC power supply timing of the PFC circuit 3 and the VCC power supply timing of the first resonance controller U1.
  • the power supply module 14 may use an existing power supply, for example The dual-line linear DC power supply, etc., supplies the PFC circuit 3 and the first resonance controller U1 with the power supply voltage in sequence through the power supply module 14.
  • the first resonant controller U1 since the input voltage is 100-240V, the first resonant controller U1 is powered on at the moment of startup and the secondary output is lightly loaded, and then passes through the auxiliary winding N2 of the first transformer T1 and the second Diode D2 generates a stable VC voltage after rectification, and supplies power to the first resonant controller U1 through the power supply module 14.
  • the start/standby signal input terminal STB When the start/standby signal input terminal STB receives the power-on signal (high level in this embodiment), it passes the second The resistor R2, the third resistor R3, the first capacitor C1 and the transistor Q1 output a high level, and control the optocoupler U2 to be turned on, thereby controlling the power supply module 14 to output the PFCVCC voltage to supply power to the PFC circuit 3. After the PFC circuit 3 module works normally, The PFC voltage is output.
  • the auxiliary power supply 10 enters the normal operating mode, and the first resonance controller U1 outputs the upper tube drive signal HO and the lower tube drive signal LO, respectively, to control the upper tube in the first LLC resonance module 11
  • the first MOS tube M1 and the second MOS tube M2 are turned on and off, and form a resonant conversion network with the first transformer T1 and the resonant capacitor second capacitor C2.
  • the first transformer T1 After the first transformer T1 performs voltage conversion to the secondary output The energy is rectified and filtered by the first rectifying and filtering unit 151 and the second rectifying and filtering unit 152, respectively, and outputs two voltages of Vout2 and +12V, of which +12V is output to the secondary LLC resonance module to supply power to the secondary LLC resonance module.
  • the main power supply 20 starts to work normally thereafter, the second LLC resonant module 21 converts the PFC voltage and outputs Vout1 to supply power to the backlight module, and then the entire power supply system enters the normal working mode.
  • the auxiliary power supply 10 uses an LLC circuit, the primary MOS zero voltage turn-on (ZVS) and the secondary rectifier diode zero current cutoff (ZCS) greatly reduce the EMI risk of the auxiliary power supply 10, and further preferably, to improve the power supply System stability, the auxiliary power supply is also provided with a third diode D3, a twelfth resistor R12 and a thirteenth resistor R13, the anode of the third diode D3 is connected to the EMI filter circuit 1, the third The cathode of the three diode D3 is connected to the BO signal terminal of the first resonance controller U1 and one end of the thirteenth resistor R13 through the twelfth resistor R12, and the other end of the thirteenth resistor R13 is grounded when the input voltage When it is lower than the set voltage protection value, the first resonant controller U1 is stopped by detecting the input signal pin of the BO signal terminal, then the entire auxiliary power supply 10 stops working, which in turn stops the entire power supply system
  • the secondary LLC control module 22 includes a second resonance controller U3 and a switch SW1
  • the drive isolation module 24 includes a drive transformer T2, a sixth resistor R6 and a fourth capacitor C4 ;
  • One end of the sixth resistor R6 is connected to the PLH signal terminal of the second resonance controller U3, and the other end of the sixth resistor R6 is connected to the sixth terminal of the drive transformer T2;
  • the fourth capacitor C4 One end is connected to the PLL signal end of the second resonance controller U3, and the other end of the fourth capacitor C4 is connected to the seventh end of the drive transformer T2;
  • the first end, the second end, and the second end of the drive transformer T2 5 terminals are connected to the second LLC resonance module 21;
  • the power supply terminal of the second resonance controller U3 is connected to the on/standby signal input terminal and the second voltage output terminal through the switch SW1, the second resonance control
  • the BCS signal terminal and the BICS signal terminal of the controller U3 are both connected to the current detection module 25, and the SLH signal terminal
  • the second LLC resonance module 21 includes a seventh resistor R7, an eighth resistor R8, a third MOS tube M3, a fourth MOS tube M4, a fifth capacitor C5, a second transformer T3, and a current transformer T4; the current detection
  • the module 25 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11 and a sixth capacitor C6;
  • the synchronous rectification module 23 includes a fifth MOS transistor M5 and a sixth MOS transistor M6, and the main power supply 20 further includes A seventh capacitor C7 for filtering; one end of the seventh resistor R7 is connected to the first end of the driving transformer T2, and the other end of the seventh resistor R7 is connected to the gate of the third MOS transistor M3; One end of the eighth resistor R8 is connected to the fifth end of the driving transformer T2, and the other end of the eighth resistor R8 is connected to the gate of the fourth MOS tube M4; the drain of the third MOS tube M3 is connected The output end of the P
  • the PFC circuit 3 when the power is turned on, when the start/standby signal input terminal STB inputs a start signal, the PFC circuit 3 is turned on to output the PFC voltage, and the first resonance controller U1 controls the first LLC resonance module 11 to work normally.
  • the second voltage +12V output after the voltage conversion of the PFC voltage through the first transformer T1 supplies power to the second resonance controller U3 through the switch SW1 controlled by the STB signal, that is, when the switch SW1 receives the power-on signal, Control the conduction between the second voltage output terminal and the power supply terminal of the second resonant controller U3, so that the first transformer T1 outputs +12V to supply power to the second resonant controller U3 to start working, and the second resonant controller U3 starts After normal operation, it outputs the upper tube driving signal PLH and the lower tube driving signal PLL respectively, and controls the conduction of the upper third MOS transistor M3 and the lower fourth MOS transistor M4 in the second LLC resonance module 21 via the driving transformer T2.
  • the current feedback signal is output To the second resonant controller U3, to achieve LLC resonant loop output power control and protection.
  • the second resonant controller U3 also controls the turn-on and turn-off of the fifth MOS transistor M5 and the sixth MOS transistor M6 of the synchronous rectifier MOS transistor to realize the secondary rectifier output.
  • the high-power LLC control is set For the secondary output, the LLC MOS tube in the main power supply 20 is driven by the drive transformer T2 isolation method, which reduces the risk of damage to the control chip at the primary; at the same time, the main power supply 20 output uses synchronous rectification and LLC co-chip method, which is
  • the second resonant controller U3 adopts the combination of LLC driving and secondary output synchronous rectification, which improves the reliability of the synchronous rectification scheme.
  • the second resonant controller U3 can use a control chip of model FAN7688SJX. In other embodiments, other resonant controllers having the same function may also be used, which is not limited in this disclosure.
  • the standby signal passes through the second resistor R2, the third resistor R3, the first capacitor C1C1, and the transistor Q1 to output a low voltage Level, control the optocoupler U2 to be turned off, so that the power supply module 14 stops supplying power to the PFC circuit 3, the PFC circuit 3 is closed, the first LLC resonance module 11 stops outputting the second voltage to the secondary LLC control module 22, and the standby signal also passes
  • the switch SW1 in the stage resonance control module 12 disconnects the loop between the second voltage output terminal and the second resonance controller U3, so that the second resonance controller U3 stops working, and the second transformer T3 stops outputting the third voltage to The backlight module, the screen goes out, at this time the power supply module 14 only supplies power to the first resonance controller U1, so that it enters the standby state, so far, the entire power supply system enters the standby working mode, waiting to receive the turn-on signal to turn on the PFC circuit 3 again, The entire system
  • the present disclosure can omit a separate standby circuit and realize standby low power consumption.
  • the auxiliary power supply 10 can be used as both a main board power supply and a standby power supply. It also simplifies the structure of a high-power power supply and saves system costs.
  • the present disclosure also correspondingly provides a television, including the television power supply driving device described above. Since the television power supply driving device has been described in detail above, it will not be detailed here.
  • the television power supply device includes a power board connected to the main board and the backlight module, the power board is provided with a PFC circuit, and the power board An auxiliary power supply for the main board and a main power supply for the backlight module are also provided on the main power supply;
  • the auxiliary power supply includes a first LLC resonance module, a resonance control module, a standby control module, a power supply module, and a rectifier filter module;
  • the power supply includes a second LLC resonance module, a secondary LLC control module, and a synchronous rectification module.
  • the standby control module controls the power supply module to turn on the resonance control module and the PFC circuit successively when receiving the power-on signal, and the PFC circuit outputs the PFC voltage to the first LLC resonance module and the second LLC resonance module.
  • An LLC resonance module converts the PFC voltage into a first voltage and a second voltage according to the first control signal output by the resonance control module, and after rectification and filtering by the rectification and filtering module, respectively output to the main board and the secondary LLC control module for power supply.
  • the second LLC resonant module converts the PFC voltage into a third voltage according to the secondary LLC control module outputting a second control signal, and then performs synchronous rectification by the synchronous rectification module to output power to the backlight module; the standby control When the module receives the standby signal, it controls the power supply module to turn off the PFC circuit to stop outputting the PFC voltage, so that the resonance control module enters the standby state.
  • An embodiment of the present disclosure provides a TV power supply driving device and a TV set.
  • the power supply efficiency and the power supply efficiency are avoided while simplifying the power supply structure. The problem of limited heat dissipation.

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Abstract

本公开涉及了一种电视电源驱动装置和电视机，由待机控制模块在接收到开机信号时控制供电模块先后开启谐振控制模块和PFC电路，由PFC电路输出PFC电压至第一LLC谐振模块和第二LLC谐振模块，第一LLC谐振模块根据谐振控制模块输出的第一控制信号将PFC电压转换为第一电压和第二电压，并经整流滤波模块整流滤波后分别输出给主板和次级LLC控制模块供电，第二LLC谐振模块根据次级LLC控制模块输出第二控制信号将PFC电压转换为第三电压，并经同步整流模块进行同步整流后输出给背光模组供电；待机控制模块在接收到待机信号时控制供电模块关闭PFC电路使其停止输出PFC电压，使所述谐振控制模块进入待机状态，使得在简化了电源架构的同时也避免了电源效率和散热受限的问题。

Description

一种电视电源驱动装置和电视机 技术领域
本公开涉及电器电源技术领域，特别涉及一种电视电源驱动装置和电视机。
背景技术
传统的大尺寸LED电视电源供电系统中，通常采用EMI电路、PFC电路(功率因数校正电路)、为背光模组供电的大电流输出LLC谐振电路加上单独的同步整流电路、为主板供电的LLC谐振电路以及单独的待机电路，但是现有的供电系统中由于含有独立的待机电路使得系统较为复杂，器件多，成本较高，占用PCB板面积较大，不利于大尺寸电源的小型化及低成本化，目前也有部分电源采用反激电路为主板供电以省去待机电路，但是使用反激电路使得电源效率较低且散热片较大，不利于大功率电视电源的散热。
因而现有技术还有待改进和提高。
发明内容
鉴于上述现有技术的不足之处，本公开的目的在于提供一种电视电源驱动装置和电视机，通过将主电源和辅电源均采用LLC架构且省去了单独的待机电路，使得在简化了电源架构的同时也避免了电源效率和散热受限的问题。
为了达到上述目的，本公开采取了以下技术方案：
一种电视电源驱动装置，包括与主板和背光模组连接的电源板，所述电源板上设置有PFC电路，所述电源板上还设置有为主板供电的辅电源，以及为背光模组供电的主电源；所述辅电源包括第一LLC谐振模块、谐振控制模块、待机控制模块、供电模块和整流滤波模块；所述主电源包括第二LLC谐振模块、次级LLC控制模块和同步整流模块；
上电后所述待机控制模块在接收到开机信号时控制所述供电模块先后开启谐振控制模块和PFC电路，由PFC电路输出PFC电压至第一LLC谐振模块和第二LLC谐振模块，所述第一LLC谐振模块根据谐振控制模块输出的第一控制信号将所述PFC电压转换为第一电压和第二电压，并经整流滤波模块整流滤波后分别输 出给主板和次级LLC控制模块供电，所述第二LLC谐振模块根据次级LLC控制模块输出第二控制信号将所述PFC电压转换为第三电压，并经所述同步整流模块进行同步整流后输出给背光模组供电；所述待机控制模块在接收到待机信号时控制所述供电模块关闭PFC电路使其停止输出PFC电压，使所述谐振控制模块进入待机状态。
所述的电视电源驱动装置中，所述主电源还包括驱动隔离模块，由所述驱动隔离模块将次级LLC控制模块输出的第二控制信号隔离输出至第二LLC谐振模块。
所述的电视电源驱动装置中，所述主电源还包括电流检测模块，由所述电流检测模块检测第二LLC谐振模块的电流并输出电流反馈信号至次级LLC控制模块，所述次级LLC控制模块根据所述电流反馈信号调节所述第二控制信号。
所述的电视电源驱动装置中，所述谐振控制模块包括预启动单元、谐振控制单元和反馈单元；上电后由所述预启动单元为谐振控制单元提供预启动电压，所述谐振控制单元开启后输出第一控制信号至所述第一LLC谐振模块；所述反馈单元对所述第一电压和第二电压进行电压检测并输出电压反馈信号至谐振控制单元，所述谐振控制单元根据所述电压反馈信号调节所述第一控制信号。
所述的电视电源驱动装置中，所述待机控制模块包括信号检测单元和输出控制单元；所述信号检测单元在检测到开机信号时输出第一电平至输出控制单元，在检测到待机信号时输出第二电平至输出控制单元；所述输出控制单元在接收到第一电平时控制所述供电模块先后开启谐振控制模块和PFC电路，在接收到第二电平时控制所述供电模块关闭PFC电路。
所述的电视电源驱动装置中，所述预启动单元包括第一二极管和第一电阻，所述谐振控制单元包括第一谐振控制器；所述第一二极管的正极连接所述EMI滤波电路的输出端，所述第一二极管的负极通过所述第一电阻连接第一谐振控制器的HV信号端；所述第一谐振控制器的HO信号端、LO信号端和HB信号端连接所述第一LLC谐振模块，所述第一谐振控制器的FB信号端连接所述反馈单元，所述第一谐振控制器的VCC端连接所述供电模块；所述反馈单元还连接所述整流滤波模块的输出端。
所述的电视电源驱动装置中，所述信号检测单元包括第二电阻、第三电阻、第一电容和三极管；所述输出控制单元包括光耦，所述第二电阻的一端连接开/ 待机信号输入端，所述第二电阻的另一端连接第三电阻的一端、第一电容的一端和三极管的基极；所述第三电阻的另一端、第一电容的另一端和三极管的发射极均接地；所述三极管的集电极连接所述光耦的第2端；所述光耦的第1端第二电压输出端，所述光耦的第3端和第4端均连接所述供电模块。
所述的电视电源驱动装置中，所述第一LLC谐振模块包括第四电阻、第五电阻、第一MOS管、第二MOS管、第二电容、第三电容、第二二极管和第一变压器，所述整流滤波模块包括第一整流滤波单元和第二整流滤波单元；所述第四电阻的一端连接所述第一谐振控制器的HO信号端，所述第四电阻的另一端连接所述第一MOS管的栅极；所述第五电阻的一端连接所述第一谐振控制器的LO信号端，所述第五电阻的另一端连接所述第一MOS管的栅极；所述第一MOS管的漏极连接PFC电路的输出端，所述第一MOS管的源极连接第二MOS管的漏极、第一谐振控制器的HB信号端和第一变压器的第1端；所述第二MOS管的源极接地；所述第二电容的一端连接第一变压器的第2端，所述第二电容的另一端接地；所述第二二极管的正极连接所述第一变压器的第3端，所述第二变压器的负极连接所述第三电容的正极和供电模块；所述第一变压器的第10端和第12端通过所述第一整流滤波单元连接第一电压输出端，所述第一变压器的第6端和第9端通过所述第二整流滤波单元连接第二电压输出端。
所述的电视电源驱动装置中，所述次级LLC控制模块包括第二谐振控制器和切换开关，所述驱动隔离模块包括驱动变压器，第六电阻和第四电容；所述第六电阻的一端连接所述第二谐振控制器的PLH信号端，所述第六电阻的另一端连接所述驱动变压器的第6端；所述第四电容的一端连接所述第二谐振控制器的PLL信号端，所述第四电容的另一端连接所述驱动变压器的第7端；所述驱动变压器的第1端、第2端和第5端均连接所述第二LLC谐振模块；所述第二谐振控制器的电源端通过所述切换开关连接开/待机信号输入端和第二电压输出端，所述第二谐振控制器的BCS信号端和BICS信号端均连接所述电流检测模块，所述第二谐振控制器的SLH信号端和SLL信号端均连接所述同步整流模块。
所述的电视电源驱动装置中，所述第二LLC谐振模块包括第七电阻、第八电阻、第三MOS管、第四MOS管、第五电容、第二变压器和电流互感器；所述第七电阻的一端连接所述驱动变压器的第1端，所述第七电阻的另一端连接所述第三 MOS管的栅极；所述第八电阻的一端连接所述驱动变压器的第5端，所述第八电阻的另一端连接所述第四MOS管的栅极；所述第三MOS管的漏极连接PFC电路的输出端，所述第三MOS管的源极连接第四MOS管的漏极、驱动变压器的第2端和第二变压器的第1端；所述第四MOS管的源极接地；所述第二变压器的第4端连接所述电流互感器的第3端和第4端，所述第二变压器的第5端和第6端连接所述第六MOS管M6的漏极，所述第二变压器的第7端和第8端连接所述第五MOS管的漏极；所述第二变压器的第9端、第10端、第11端和第12端均连接第三电压输出端；所述第五电容的一端连接所述电流互感器的第1端和第2端，所述第五电容另一端接地；所述电流互感器的第7端连接所述电流检测模块。
所述的电视电源驱动装置中，所述电流检测模块包括第九电阻、第十电阻、第十一电阻和第六电容；所述第九电阻的一端和所述第六电容的一端均连接所述电流互感器的第7端和第十电阻的一端，所述第九电阻的另一端连接所述第二谐振控制器的BICS信号端；所述第十电阻得另一端连接所述第二谐振控制器的BSC信号端和第十一电阻的一端，所述第六电容的另一端和所述第十一电阻的另一端均接地。
所述的电视电源驱动装置中，所述同步整流模块包括第五MOS管和第六MOS管，所述第五MOS管的栅极连接所述第二谐振控制器的SLH信号端，所述第五MOS管的漏极连接所述第二变压器的第7端和第8端，所述第六MOS管的栅极连接所述第二谐振控制器的SLL信号端，所述第六MOS管的漏极连接所述第二变压器的第5端和第6端，所述第五MOS管的源极和第六MOS管的源极均接地。
所述的电视电源驱动装置中，所述主电源还包括第七电容，所述第七电容的正极连接第三电压输出端、所述第二变压器的第9端、第10端、第11端和第12端，所述第七电容的负极接地。
所述的电视电源驱动装置中，所述第一谐振控制器的型号为FA6A31N。
一种电视机，其括如上所述的电视电源驱动装置。
相较于现有技术，本公开提供的电视电源驱动装置和电视机中，所述电视电源驱动装置包括与主板和背光模组连接的电源板，所述电源板上设置有PFC电路，所述电源板上还设置有为主板供电的辅电源，以及为背光模组供电的主电源；所述辅电源包括第一LLC谐振模块、谐振控制模块、待机控制模块、供电模块和整 流滤波模块；所述主电源包括第二LLC谐振模块、次级LLC控制模块和同步整流模块。上电后所述待机控制模块在接收到开机信号时控制所述供电模块先后开启谐振控制模块和PFC电路，由PFC电路输出PFC电压至第一LLC谐振模块和第二LLC谐振模块，所述第一LLC谐振模块根据谐振控制模块输出的第一控制信号将所述PFC电压转换为第一电压和第二电压，并经整流滤波模块整流滤波后分别输出给主板和次级LLC控制模块供电，所述第二LLC谐振模块根据次级LLC控制模块输出第二控制信号将所述PFC电压转换为第三电压，并经所述同步整流模块进行同步整流后输出给背光模组供电；所述待机控制模块在接收到待机信号时控制所述供电模块关闭PFC电路使其停止输出PFC电压，使所述谐振控制模块进入待机状态。通过将主电源和辅电源均采用LLC架构且省去了单独的待机电路，使得在简化了电源架构的同时也避免了电源效率和散热受限的问题。
附图说明
图1为本公开提供的电视电源驱动装置的结构框图；
图2为本公开提供的电视电源驱动装置中辅电源的电路图；
图3为本公开提供的电视电源驱动装置中主电源的电路图。
具体实施方式
本公开提供一种电视电源驱动装置和电视机，通过将主电源和辅电源均采用LLC架构且省去了单独的待机电路，使得在简化了电源架构的同时也避免了电源效率和散热受限的问题。
为使本公开的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本公开进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本公开，并不用于限定本公开。
实施例1
请参阅图1，本公开提供的电视电源驱动装置包括与主板和背光模组连接的电源板，所述电源板上设置有EMI滤波电路1、整流电路2和PFC电路3，还设置有为主板供电的辅电源10，以及为背光模组供电的主电源20，其中所述辅助电源还可以为逻辑板供电；所述辅电源10包括第一LLC谐振模块11、谐振控制 模块12、待机控制模块13、供电模块14和整流滤波模块15；所述主电源20包括第二LLC谐振模块21、次级LLC控制模块22和同步整流模块23。所述EMI滤波电路1、整流电路2和PFC电路3依次连接，所述EMI滤波模块还连接所述谐振控制模块12，所述谐振控制模块12、第一LLC谐振模块11和整流滤波模块15依次连接，所述PFC电路3连接所述第一LLC谐振模块11和第二LLC谐振模块21，所述供电模块14连接所述待机控制模块13、PFC电路3和谐振控制模块12，所述次级LLC控制模块22连接所述整流滤波模块15、同步整流模块23和第二LLC谐振模块21，所述第二LLC谐振模块21连接所述同步整流模块23。
开机时，上电后所述待机控制模块13在接收到开机信号时控制所述供电模块14先后开启谐振控制模块12和PFC电路3，输入交流电依次经EMI滤波电路1和整流电流进行滤波整流后，通过PFC电路3输出PFC电压至第一LLC谐振模块11和第二LLC谐振模块21，需说明的是，所述EMI滤波电路1、整流电路2以及PFC电路3均为现有技术，可采用现有的成熟电路实现，此处对其结构与连接关系不做赘述。所述谐振控制模块12开始工作后，将输出第一控制信号至第一LLC谐振模块11，所述第一LLC谐振模块11根据谐振控制模块12输出的第一控制信号将所述PFC电压转换为第一电压(本实施例中为Vout2)和第二电压(本实施例中为+12V)，并经整流滤波模块15整流滤波后分别输出给主板和次级LLC控制模块22供电，即开机时当谐振控制模块12和PFC电路3均正常工作后，由第一LLC谐振模块11根据所述第一控制信号进行电压变换，将PFC电压转换为第一电压Vout2输出至主板，将PFC电压转换为第二电压+12V输出至次级LLC控制模块22，开启所述次级LLC控制模块22，使所述次级LLC控制模块22输出第二控制信号至第二LLC谐振模块21，由所述第二LLC谐振模块21根据所述第二控制信号将所述PFC电压转换为第三电压(本实施例中为Vout1)，并经所述同步整流模块23进行同步整流后输出给背光模组供电，从而完成上电开机过程，由于主电源20和辅电源10均采用的LLC架构，有效提高了电压效率，不会产生反激电路散热以及效率受限等问题，电源输出交差调整率更好，应用更加灵活。
待机时，所述待机控制模块13在接收到待机信号时控制所述供电模块14关闭PFC电路3使其停止输出PFC电压，使所述谐振控制模块12进入待机状态，即当待机控制模块13接收到待机信号时，控制所述供电模块14停止为PFC电路 3供电，仅仅为谐振控制模块12供电，此时PFC电路3停止输出PFC电压，第一LLC谐振模块11停止输出第二电压至次级LLC控制模块22，使得次级LLC控制模块22停止工作，进而使得第二LLC谐振模块21停止输出第三电压至背光模组，屏幕熄灭，所述谐振控制模块12进入待机状态，等待接收到开启信号再次开启PFC电路3时，整个系统再进入开机状态进而点亮屏幕。因此，本公开提供的电视电源驱动装置通过在辅电源10采用LLC振荡架构，即可满足主板的供电要求，同时也可作为待机电源，省去了单独的待机电路，满足低待机功耗的需求，同时也简化了大功率电源的架构，节约系统成本。
进一步地，所述主电源20还包括驱动隔离模块24，所述驱动隔离模块24连接所述次级LLC控制模块22和第二LLC谐振模块21，由所述驱动隔离模块24将次级LLC控制模块22输出的第二控制信号隔离输出至第二LLC谐振模块21，本实施例中，所述主电源20中将大功率LLC控制设置在第二LLC谐振模块21的次级输出，通过驱动隔离模块24隔离驱动的方式输出所述第二控制信号至第二LLC谐振模块21，以驱动所述第二LLC谐振模块21工作，有效降低了控制器在初级损坏的风险，提高了电源整体的可靠性。
更进一步地，所述主电源20还包括电流检测模块25，所述电流检测模块25连接所述次级LLC控制模块22和第二LLC谐振模块21，由所述电流检测模块25检测第二LLC谐振模块21的电流并输出电流反馈信号至次级LLC控制模块22，所述次级LLC控制模块22根据所述电流反馈信号调节所述第二控制信号。本实施例中，通过所述电流检测模块25检测主电源20中谐振网络的电流并反馈至次级LLC控制模块22，使得次级LLC控制模块22可根据电流反馈信号调节第二控制信号，实现LLC谐振环路的输出功率控制和保护。
实施例2
具体地，请一并参阅图2，所述谐振控制模块12包括预启动单元121、谐振控制单元122和反馈单元123所述预启动单元121连接所述EMI滤波电路1和谐振控制单元122，所述谐振控制单元122连接所述供电模块14和反馈单元123，所述反馈单元123还连接第一电压输出端和第二电压输出端；其中，上电后由所述预启动单元121为谐振控制单元122提供预启动电压，所述谐振控制单元122开启后输出第一控制信号至所述第一LLC谐振模块11；所述反馈单元123对所 述第一电压和第二电压进行电压检测并输出电压反馈信号至谐振控制单元122，所述谐振控制单元122根据所述电压反馈信号调节所述第一控制信号，其中所述反馈单元123可采用现有的电压检测反馈电路，本公开对此不作限定。本实施例中，当上电开机后，输入交流电先经过EMI滤波电路1滤波后为谐振控制单元122提供一个预启动单元121实现谐振控制单元122的启动，之后在待机控制模块13接受到开机信号时，再通过供电模块14为所述谐振控制单元122提供直流低压供电，谐振控制单元122开启并正常工作后输出第一控制信号至所述第一LLC谐振模块11，控制所述第一LLC谐振模块11进行电压变换，为保证输出电压的稳定性，通过所述反馈单元123进行电压检测反馈，使得谐振控制单元122可根据电压检测结果调节所述第一控制信号，实现LLC谐振环路的闭环控制，维持输出电压的稳定性，提高电源工作的稳定性和可靠性。
进一步地，所述待机控制模块13包括信号检测单元131和输出控制单元132，所述信号检测单元131连接所述开/待机信号输入端STB和输出控制单元132，所述输出控制单元132还连接所述供电模块14，所述信号检测单元131在检测到开机信号时输出第一电平至输出控制单元132，在检测到待机信号时输出第二电平至输出控制单元132；所述输出控制单元132在接收到第一电平时控制所述供电模块14先后开启谐振控制模块12和PFC电路3，在接收到第二电平时控制所述供电模块14关闭PFC电路3。本实施例中，通过所述信号检测单元131接收开机信号和待机信号，进而通过所述输出控制单元132控制所述供电模块14实现相应的供电操作，使得辅电源10在满足为主板供电需求的同时，也可作为待机电源，省去单独的待机电路，有效简化了电源架构，节约系统成本。
实施例3
具体实施时，如图2所示，所述预启动单元121包括第一二极管D1和第一电阻，所述谐振控制单元122包括第一谐振控制器U1；所述第一二极管D1的正极连接所述EMI滤波电路1的输出端，所述第一二极管D1的负极通过所述第一电阻连接第一谐振控制器U1的HV信号端；所述第一谐振控制器U1的HO信号端、LO信号端和HB信号端连接所述第一LLC谐振模块11，所述第一谐振控制器U1的FB信号端连接所述反馈单元123，所述第一谐振控制器U1的VCC端连接所述供电模块14；所述反馈单元123还连接所述整流滤波模块15的输出端。当上电 开机后，输入交流电经EMI滤波电路1滤波后通过第一二极管D1整流输出至第一谐振控制器U1的HV信号端，通过该高压预启动电压实现第一谐振控制器U1的启动，后续在接收到开机信号时则通过供电模块14输出直流低压VCC供电，无需一直保持高压供电，尽可能减少电源功耗，第一谐振控制器U1开始工作后分别输出上管驱动信号HO和下管驱动信号LO驱动第一LLC谐振模块11的工作，使其进行电压转换并在次级输出能量，本实施例中，所述第一谐振控制器U1可采用型号为FA6A31N的控制芯片，当然在其它实施例中，也可采用其它具有相同功能的谐振控制器，本公开对此不作限定。
进一步地，所述信号检测单元131包括第二电阻R2、第三电阻R3、第一电容C1C1和三极管Q1；所述输出控制单元132包括光耦U2，所述第二电阻R2的一端连接开/待机信号输入端，所述第二电阻R2的另一端连接第三电阻R3的一端、第一电容C1C1的一端和三极管Q1的基极；所述第三电阻R3的另一端、第一电容C1C1的另一端和三极管Q1的发射极均接地；所述三极管Q1的集电极连接所述光耦U2的第2端；所述光耦U2的第1端第二电压输出端，所述光耦U2的第3端和第4端均连接所述供电模块14。
所述第一LLC谐振模块11包括第四电阻R4、第五电阻R5、第一MOS管M1、第二MOS管M2、第二电容C2、第三电容C3、第二二极管D2和第一变压器T1，所述整流滤波模块15包括第一整流滤波单元151和第二整流滤波单元152；所述第四电阻R4的一端连接所述第一谐振控制器U1的HO信号端，所述第四电阻R4的另一端连接所述第一MOS管M1的栅极；所述第五电阻R5的一端连接所述第一谐振控制器U1的LO信号端，所述第五电阻R5的另一端连接所述第一MOS管M1的栅极；所述第一MOS管M1的漏极连接PFC电路3的输出端，所述第一MOS管M1的源极连接第二MOS管M2的漏极、第一谐振控制器U1的HB信号端和第一变压器T1的第1端；所述第二MOS管M2的源极接地；所述第二电容C2的一端连接第一变压器T1的第2端，所述第二电容C2的另一端接地；所述第二二极管D2的正极连接所述第一变压器T1的第3端，所述第二变压器T3的负极连接所述第三电容C3的正极和供电模块14；所述第一变压器T1的第10端和第12端通过所述第一整流滤波单元151连接第一电压输出端，所述第一变压器T1的第6端和第9端通过所述第二整流滤波单元152连接第二电压输出端，所述第一 整流滤波单元151和第二整流滤波单元152均为现有成熟电路，例如通过二极管和电容组成的整流滤波电路等。
本实施例中，在上电开机时，通过所述供电模块14控制PFC电路3的VCC供电和第一谐振控制器U1的VCC供电时序，所述供电模块14可采用现有的供电电源，例如双路线性直流稳压电源等，通过供电模块14依次为PFC电路3和第一谐振控制器U1提供供电电压。具体地，由于输入电压为100-240V，因此，在开机瞬间，次级输出轻载状态下，第一谐振控制器U1先上电工作，之后通过第一变压器T1的辅助绕组N2和第二二极管D2整流后产生稳定的VC电压，通过供电模块14为第一谐振控制器U1供电，当开/待机信号输入端STB接收到开机信号(本实施例中为高电平)时通过第二电阻R2、第三电阻R3、第一电容C1和三极管Q1后输出高电平，控制光耦U2导通，从而控制供电模块14输出PFCVCC电压为PFC电路3供电，PFC电路3模块正常工作后，输出PFC电压,该PFC电压稳定建立后，辅电源10进入正常工作模式，第一谐振控制器U1分别输出上管驱动信号HO和下管驱动信号LO，控制第一LLC谐振模块11中的上管第一MOS管M1和下管第二MOS管M2的导通和关断，与第一变压器T1和谐振电容第二电容C2组成谐振变换网络，通过第一变压器T1进行电压变换后向次级输出能量，通过第一整流滤波单元151和第二整流滤波单元152分别进行整流滤波后输出Vout2和+12V两路电压，其中+12V输出至次级LLC谐振模块为其供电，待次级LLC谐振模块正常工作后，此后主电源20开始正常工作，第二LLC谐振模块21对PFC电压进行转换后输出Vout1为背光模组供电，至此整个电源系统进入正常工作模式。
本公开中，所述辅电源10采用LLC电路，初级MOS零电压开通(ZVS)和次级整流二极管零电流截止(ZCS)，极大降低辅电源10的EMI风险，进一步优选地，为提高电源系统工作稳定性，所述辅助电源还设置有第三二极管D3、第十二电阻R12和第十三电阻R13，所述第三二极管D3的正极连接EMI滤波电路1，所述第三二极管D3的负极通过所述第十二电阻R12连接第一谐振控制器U1的BO信号端和第十三电阻R13的一端，所述第十三电阻R13的另一端接地，当输入电压低于设定的电压保护值时，通过检测BO信号端的输入信号脚使第一谐振控制器U1停止工作，则整个辅电源10停止工作，进而使得整个电源系统停止工 作，起到电压保护作用，提高电源系统的稳定性。
进一步地，请一并参阅图3，所述次级LLC控制模块22包括第二谐振控制器U3和切换开关SW1，所述驱动隔离模块24包括驱动变压器T2，第六电阻R6和第四电容C4；所述第六电阻R6的一端连接所述第二谐振控制器U3的PLH信号端，所述第六电阻R6的另一端连接所述驱动变压器T2的第6端；所述第四电容C4的一端连接所述第二谐振控制器U3的PLL信号端，所述第四电容C4的另一端连接所述驱动变压器T2的第7端；所述驱动变压器T2的第1端、第2端和第5端均连接所述第二LLC谐振模块21；所述第二谐振控制器U3的电源端通过所述切换开关SW1连接开/待机信号输入端和第二电压输出端，所述第二谐振控制器U3的BCS信号端和BICS信号端均连接所述电流检测模块25，所述第二谐振控制器U3的SLH信号端和SLL信号端均连接所述同步整流模块23。
所述第二LLC谐振模块21包括第七电阻R7、第八电阻R8、第三MOS管M3、第四MOS管M4、第五电容C5、第二变压器T3和电流互感器T4；所述电流检测模块25包括第九电阻R9、第十电阻R10、第十一电阻R11和第六电容C6；所述同步整流模块23包括第五MOS管M5和第六MOS管M6，所述主电源20还包括用于滤波的第七电容C7；所述第七电阻R7的一端连接所述驱动变压器T2的第1端，所述第七电阻R7的另一端连接所述第三MOS管M3的栅极；所述第八电阻R8的一端连接所述驱动变压器T2的第5端，所述第八电阻R8的另一端连接所述第四MOS管M4的栅极；所述第三MOS管M3的漏极连接PFC电路3的输出端，所述第三MOS管M3的源极连接第四MOS管M4的漏极、驱动变压器T2的第2端和第二变压器T3的第1端；所述第四MOS管M4的源极接地；所述第二变压器T3的第4端连接所述电流互感器T4的第3端和第4端，所述第二变压器T3的第5端和第6端连接所述第六MOS管M6的漏极，所述第二变压器T3的第7端和第8端连接所述第五MOS管M5的漏极，所述第二变压器T3的第9端、第10端、第11端和第12端均连接第七电容C7的正极和第三电压输出端；所述第五MOS管M5的栅极连接所述第二谐振控制器U3的SLH信号端，所述第六MOS管M6的栅极连接所述第二谐振控制器U3的SLL信号端，所述第五MOS管M5的源极、第六MOS管M6的源极和第七电容C7的负极均接地；所述第五电容C5的一端连接所述电流互感器T4的第1端和第2端，所述第五电容C5另一端接地；所述电流 互感器T4的第7端连接所述第九电阻R9的一端、第十电阻R10的一端和第六电容C6的一端；所述第九电阻R9的另一端连接所述第二谐振控制器U3的BICS信号端；所述第十电阻R10的另一端连接所述第二谐振控制器U3的BSC信号端和第十一电阻R11的一端；所述第六电容C6的另一端和第十一电阻R11的另一端接地。
本实施例中，在上电开机时，当开/待机信号输入端STB输入开机信号，使得PFC电路3开启输出PFC电压，且第一谐振控制器U1控制第一LLC谐振模块11正常工作后，通过第一变压器T1对PFC电压进行电压转换后输出的第二电压+12V通过由STB信号控制的切换开关SW1给第二谐振控制器U3供电，即所述切换开关SW1在接收到开机信号时，控制第二电压输出端与第二谐振控制器U3的电源端之间导通，使得第一变压器T1输出+12V为第二谐振控制器U3供电，使其开始工作，第二谐振控制器U3启动并正常工作后，分别输出上管驱动信号PLH和下管驱动信号PLL，经驱动变压器T2分别控制第二LLC谐振模块21中的上管第三MOS管M3和下管第四MOS管M4的导通和关断，与第二变压器T3、电流互感器T4及谐振电容第五电容C5组成谐振变换网络，通过第二变压器T3向次级输出能量，次级输出电压经过同步整流MOS管第五MOS管M5和第六MOS管M6进行同步整流处理后输出第三电压Vout1给背光模组供电，点亮显示屏，使整个电源系统进入正常工作模式。其中所述电流互感器T4用于检测谐振回路的电流，经检测电路第六电容C6和第九电阻R9、过流保护电压取样电路第十电阻R10和第十一电阻R11后，输出电流反馈信号至第二谐振控制器U3，实现LLC谐振环路输出功率控制和保护。同时，所述第二谐振控制器U3还通过控制同步整流MOS管第五MOS管M5和第六MOS管M6的开通和关断，实现次级整流输出，本申请中，将大功率LLC控制置于次级输出，通过驱动变压器T2隔离方式驱动主电源20中的LLC MOS管，降低了控制芯片在初级损坏的风险；同时，主电源20输出采用的同步整流与LLC共芯片方式，即所述第二谐振控制器U3采用LLC驱动和次级输出同步整流二合一的方式，提高了同步整流方案的可靠性，其中所述第二谐振控制器U3可采用型号为FAN7688SJX的控制芯片，当然在其它实施例中，也可采用其它具有相同功能的谐振控制器，本公开对此不作限定。
当开/待机信号输入端STB输入待机信号时(本实施例中为低电平)，所述待 机信号通过第二电阻R2、第三电阻R3、的第一电容C1C1和三极管Q1后输出低电平，控制光耦U2关断，使得供电模块14停止为PFC电路3供电，PFC电路3关闭，第一LLC谐振模块11停止输出第二电压至次级LLC控制模块22，同时待机信号还通过次级谐振控制模块12中的切换开关SW1，断开第二电压输出端与第二谐振控制器U3之间的回路，使第二谐振控制器U3停止工作，第二变压器T3停止输出第三电压至背光模组，屏幕熄灭，此时供电模块14仅给第一谐振控制器U1供电，使其进入待机状态，至此，整个电源系统进入待机工作模式，等待接收到开启信号再次开启PFC电路3时，整个系统再进入开机状态进而点亮屏幕。因此本公开可省去单独的待机电路，实现待机低功耗。所述辅电源10既可作为主板供电电源，又可作为待机电源，也简化了大功率电源的架构，节约系统成本。
实施例4
基于上述电视电源驱动装置，本公开还相应提供一种电视机，包括如上所述的电视电源驱动装置，由于上文已对所述电视电源驱动装置进行了详细描述，此处不作详述。
综上所述，本公开提供的电视电源驱动装置和电视机中，所述电视电源驱动装置包括与主板和背光模组连接的电源板，所述电源板上设置有PFC电路，所述电源板上还设置有为主板供电的辅电源，以及为背光模组供电的主电源；所述辅电源包括第一LLC谐振模块、谐振控制模块、待机控制模块、供电模块和整流滤波模块；所述主电源包括第二LLC谐振模块、次级LLC控制模块和同步整流模块。上电后所述待机控制模块在接收到开机信号时控制所述供电模块先后开启谐振控制模块和PFC电路，由PFC电路输出PFC电压至第一LLC谐振模块和第二LLC谐振模块，所述第一LLC谐振模块根据谐振控制模块输出的第一控制信号将所述PFC电压转换为第一电压和第二电压，并经整流滤波模块整流滤波后分别输出给主板和次级LLC控制模块供电，所述第二LLC谐振模块根据次级LLC控制模块输出第二控制信号将所述PFC电压转换为第三电压，并经所述同步整流模块进行同步整流后输出给背光模组供电；所述待机控制模块在接收到待机信号时控制所述供电模块关闭PFC电路使其停止输出PFC电压，使所述谐振控制模块进入待机状态。通过将主电源和辅电源均采用LLC架构且省去了单独的待机电路，使得在简 化了电源架构的同时也避免了电源效率和散热受限的问题。
可以理解的是，对本领域普通技术人员来说，可以根据本公开的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本公开所附的权利要求的保护范围。
工业实用性
本公开实施例提供的一种电视电源驱动装置和电视机，通过将主电源和辅电源均采用LLC架构且省去了单独的待机电路，使得在简化了电源架构的同时也避免了电源效率和散热受限的问题。

Claims (15)

  1. 一种电视电源驱动装置，包括与主板和背光模组连接的电源板，所述电源板上设置有PFC电路，其特征在于，所述电源板上还设置有为主板供电的辅电源，以及为背光模组供电的主电源；所述辅电源包括第一LLC谐振模块、谐振控制模块、待机控制模块、供电模块和整流滤波模块；所述主电源包括第二LLC谐振模块、次级LLC控制模块和同步整流模块；
    上电后由待机控制模块在接收到开机信号时控制所述供电模块先后开启谐振控制模块和PFC电路，由PFC电路输出PFC电压至第一LLC谐振模块和第二LLC谐振模块，所述第一LLC谐振模块根据谐振控制模块输出的第一控制信号将所述PFC电压转换为第一电压和第二电压，并经整流滤波模块整流滤波后分别输出给主板和次级LLC控制模块供电，所述第二LLC谐振模块根据次级LLC控制模块输出第二控制信号将所述PFC电压转换为第三电压，并经所述同步整流模块进行同步整流后输出给背光模组供电；所述待机控制模块在接收到待机信号时控制所述供电模块关闭PFC电路使其停止输出PFC电压，使所述谐振控制模块进入待机状态。
  2. 根据权利要求1所述的电视电源驱动装置，其特征在于，所述主电源还包括驱动隔离模块，由所述驱动隔离模块将次级LLC控制模块输出的第二控制信号隔离输出至第二LLC谐振模块。
  3. 根据权利要求2所述的电视电源驱动装置，其特征在于，所述主电源还包括电流检测模块，由所述电流检测模块检测第二LLC谐振模块的电流并输出电流反馈信号至次级LLC控制模块，所述次级LLC控制模块根据所述电流反馈信号调节所述第二控制信号。
  4. 根据权利要求1所述的电视电源驱动装置，其特征在于，所述谐振控制模块包括预启动单元、谐振控制单元和反馈单元；上电后由所述预启动单元为谐振控制单元提供预启动电压，所述谐振控制单元开启后输出第一控制信号至所述第一LLC谐振模块；所述反馈单元对所述第一电压和第二电压进行电压检测并输出电压反馈信号至谐振控制单元，所述谐振控制单元根据所述电压反馈信号调节所述第一控制信号。
  5. 根据权利要求1所述的电视电源驱动装置，其特征在于，所述待机控制模块包括信号检测单元和输出控制单元；所述信号检测单元在检测到开机信号 时输出第一电平至输出控制单元，在检测到待机信号时输出第二电平至输出控制单元；所述输出控制单元在接收到第一电平时控制所述供电模块先后开启谐振控制模块和PFC电路，在接收到第二电平时控制所述供电模块关闭PFC电路。
  6. 根据权利要求4所述的电视电源驱动装置，其特征在于，所述预启动单元包括第一二极管和第一电阻，所述谐振控制单元包括第一谐振控制器；所述第一二极管的正极连接所述EMI滤波电路的输出端，所述第一二极管的负极通过所述第一电阻连接第一谐振控制器的HV信号端；所述第一谐振控制器的HO信号端、LO信号端和HB信号端连接所述第一LLC谐振模块，所述第一谐振控制器的FB信号端连接所述反馈单元，所述第一谐振控制器的VCC端连接所述供电模块；所述反馈单元还连接所述整流滤波模块的输出端。
  7. 根据权利要求5所述的电视电源驱动装置，其特征在于，所述信号检测单元包括第二电阻、第三电阻、第一电容和三极管；所述输出控制单元包括光耦，所述第二电阻的一端连接开/待机信号输入端，所述第二电阻的另一端连接第三电阻的一端、第一电容的一端和三极管的基极；所述第三电阻的另一端、第一电容的另一端和三极管的发射极均接地；所述三极管的集电极连接所述光耦的第2端；所述光耦的第1端第二电压输出端，所述光耦的第3端和第4端均连接所述供电模块。
  8. 根据权利要求6所述的电视电源驱动装置，其特征在于，所述第一LLC谐振模块包括第四电阻、第五电阻、第一MOS管、第二MOS管、第二电容、第三电容、第二二极管和第一变压器，所述整流滤波模块包括第一整流滤波单元和第二整流滤波单元；所述第四电阻的一端连接所述第一谐振控制器的HO信号端，所述第四电阻的另一端连接所述第一MOS管的栅极；所述第五电阻的一端连接所述第一谐振控制器的LO信号端，所述第五电阻的另一端连接所述第一MOS管的栅极；所述第一MOS管的漏极连接PFC电路的输出端，所述第一MOS管的源极连接第二MOS管的漏极、第一谐振控制器的HB信号端和第一变压器的第1端；所述第二MOS管的源极接地；所述第二电容的一端连接第一变压器的第2端，所述第二电容的另一端接地；所述第二二极管的正极连接所述第一变压器的第3端，所述第二变压器的负极连接所述第三电容的正极和供电模块；所述第一变压器的第10端和第12端通过所述第一整流滤波单元连接第一电压输出 端，所述第一变压器的第6端和第9端通过所述第二整流滤波单元连接第二电压输出端。
  9. 根据权利要求3所述的电视电源驱动装置，其特征在于，所述次级LLC控制模块包括第二谐振控制器和切换开关，所述驱动隔离模块包括驱动变压器，第六电阻和第四电容；所述第六电阻的一端连接所述第二谐振控制器的PLH信号端，所述第六电阻的另一端连接所述驱动变压器的第6端；所述第四电容的一端连接所述第二谐振控制器的PLL信号端，所述第四电容的另一端连接所述驱动变压器的第7端；所述驱动变压器的第1端、第2端和第5端均连接所述第二LLC谐振模块；所述第二谐振控制器的电源端通过所述切换开关连接开/待机信号输入端和第二电压输出端，所述第二谐振控制器的BCS信号端和BICS信号端均连接所述电流检测模块，所述第二谐振控制器的SLH信号端和SLL信号端均连接所述同步整流模块。
  10. 根据权利要求9所述的电视电源驱动装置，其特征在于，所述第二LLC谐振模块包括第七电阻、第八电阻、第三MOS管、第四MOS管、第五电容、第二变压器和电流互感器；所述第七电阻的一端连接所述驱动变压器的第1端，所述第七电阻的另一端连接所述第三MOS管的栅极；所述第八电阻的一端连接所述驱动变压器的第5端，所述第八电阻的另一端连接所述第四MOS管的栅极；所述第三MOS管的漏极连接PFC电路的输出端，所述第三MOS管的源极连接第四MOS管的漏极、驱动变压器的第2端和第二变压器的第1端；所述第四MOS管的源极接地；所述第二变压器的第4端连接所述电流互感器的第3端和第4端，所述第二变压器的第5端和第6端连接所述第六MOS管M6的漏极，所述第二变压器的第7端和第8端连接所述第五MOS管的漏极；所述第二变压器的第9端、第10端、第11端和第12端均连接第三电压输出端；所述第五电容的一端连接所述电流互感器的第1端和第2端，所述第五电容另一端接地；所述电流互感器的第7端连接所述电流检测模块。
  11. 根据权利要求10所述的电视电源驱动装置，其特征在于，所述电流检测模块包括第九电阻、第十电阻、第十一电阻和第六电容；所述第九电阻的一端和所述第六电容的一端均连接所述电流互感器的第7端和第十电阻的一端，所述第九电阻的另一端连接所述第二谐振控制器的BICS信号端；所述第十电阻得 另一端连接所述第二谐振控制器的BSC信号端和第十一电阻的一端，所述第六电容的另一端和所述第十一电阻的另一端均接地。
  12. 根据权利要求11所述的电视电源驱动装置，其特征在于，所述同步整流模块包括第五MOS管和第六MOS管，所述第五MOS管的栅极连接所述第二谐振控制器的SLH信号端，所述第五MOS管的漏极连接所述第二变压器的第7端和第8端，所述第六MOS管的栅极连接所述第二谐振控制器的SLL信号端，所述第六MOS管的漏极连接所述第二变压器的第5端和第6端，所述第五MOS管的源极和第六MOS管的源极均接地。
  13. 根据权利要求12所述的电视电源驱动装置，其特征在于，所述主电源还包括第七电容，所述第七电容的正极连接第三电压输出端、所述第二变压器的第9端、第10端、第11端和第12端，所述第七电容的负极接地。
  14. 根据权利要求6所述的电视电源驱动装置，其特征在于，所述第一谐振控制器的型号为FA6A31N。
  15. 一种电视机，其特征在于，包括如权利要求1-14任意一项所述的电视电源驱动装置。
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