CN210629356U - LLC power control circuit and power control device - Google Patents

LLC power control circuit and power control device Download PDF

Info

Publication number
CN210629356U
CN210629356U CN201921406456.2U CN201921406456U CN210629356U CN 210629356 U CN210629356 U CN 210629356U CN 201921406456 U CN201921406456 U CN 201921406456U CN 210629356 U CN210629356 U CN 210629356U
Authority
CN
China
Prior art keywords
module
switch module
switch
power supply
pin
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.)
Active
Application number
CN201921406456.2U
Other languages
Chinese (zh)
Inventor
李锦乐
郑焕伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen TCL New Technology Co Ltd
Original Assignee
Shenzhen TCL New Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen TCL New Technology Co Ltd filed Critical Shenzhen TCL New Technology Co Ltd
Priority to CN201921406456.2U priority Critical patent/CN210629356U/en
Application granted granted Critical
Publication of CN210629356U publication Critical patent/CN210629356U/en
Priority to PCT/CN2020/107646 priority patent/WO2021036740A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The utility model discloses a LLC power control circuit and power controlling means, LLC power control circuit includes control module, voltage output module, first switch module, second switch module and voltage regulation module, the operating condition of first switch module and second switch module of control module control; when the first switch module is switched on and the second switch module is switched off, the adjusting module outputs a first feedback signal to the control module based on the first power supply voltage output by the voltage output module, so as to control the switching-on time of the first switch module and adjust the first power supply voltage; when the first switch module is switched off and the second switch module is switched on, the adjusting module outputs a second feedback signal to the control module based on a second power supply voltage output by the voltage output module, so that the on-time of the second switch module is controlled, the second power supply voltage is adjusted, and therefore independent control or adjustment of the two paths of power supply voltages is achieved.

Description

LLC power control circuit and power control device
Technical Field
The utility model relates to the technical field of electrical apparatus, in particular to LLC power control circuit and power controlling means.
Background
At present, independent control of multiple paths of electric energy output cannot be realized in power supplies with various topological architectures in the power supply industry, and therefore, for electric equipment with different control requirements on electric energy, simultaneous power supply of the electric equipment cannot be realized by using a single power supply with electric energy output.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a LLC power control circuit and power controlling means can realize independent control or regulation to multichannel supply voltage to satisfy the power consumption demand of the consumer that has different control demands.
In order to achieve the purpose, the utility model adopts the following technical proposal:
an LLC power supply control circuit comprises a control module, a voltage output module, a first switch module, a second switch module and a voltage regulation module, wherein the control module is respectively connected with the first switch module, the second switch module and the voltage regulation module;
controlling the working states of the first switch module and the second switch module by the control module; when the first switch module is switched on and the second switch module is switched off, the adjusting module outputs a first feedback signal to the control module based on a first power supply voltage output by the voltage output module, and the control module controls the on-time of the first switch module based on the first feedback signal so as to adjust the first power supply voltage currently output by the voltage output module;
when the first switch module is switched off and the second switch module is switched on, the adjusting module outputs a second feedback signal to the control module based on a second power supply voltage output by the voltage output module, and the control module controls the on-time of the second switch module based on the second feedback signal so as to adjust the second power supply voltage currently output by the voltage output module.
In the LLC power supply control circuit, the regulation module includes a first regulation unit and a second regulation unit, the first regulation unit is connected with the voltage output module and the control module, respectively, and the second regulation unit is connected with the voltage output module and the control module, respectively; the first adjusting unit outputs a first feedback signal to the control module based on the first power supply voltage; the second adjusting unit outputs a second feedback signal to the control module based on the second power supply voltage.
In the LLC power control circuit, the first adjusting unit comprises a first error amplifier, a first photoelectric coupler and a first switch, a 1 st pin and a 2 nd pin of the first photoelectric coupler are connected with the first error amplifier, a 4 th pin of the first photoelectric coupler is connected with the power by the first switch, a 3 rd pin of the first photoelectric coupler is connected with the control module, and the first error amplifier is further connected with the voltage output module.
In the LLC power supply control circuit, the second adjusting unit includes a second error amplifier, a second photoelectric coupler and a second switch, the 1 st pin and the 2 nd pin of the second photoelectric coupler are connected to the second error amplifier, the 4 th pin of the second photoelectric coupler is connected to the power by the second switch, the 3 rd pin of the second photoelectric coupler is connected to the control module, and the second error amplifier is further connected to the voltage output module.
In the LLC power supply control circuit, the control module includes a first capacitor and an LLC controller, one end of the first capacitor is connected to the FB signal end of the LLC controller, the 3 rd pin of the first photoelectric coupler and the 3 rd pin of the second photoelectric coupler, the other end of the first capacitor is grounded, the Up gate signal end of the LLC controller is connected to the first switch module, and the Low gate signal end of the LLC controller is connected to the second switch module.
In the LLC power supply control circuit, the voltage output module includes a transformer, a second capacitor, a third capacitor, a fourth capacitor, a first diode, and a second diode, a 5 th pin of the transformer is grounded via the second capacitor, a 7 th pin of the transformer is connected to the first switch module and the second switch module, a 1 st pin of the transformer is connected to an anode of the first diode, a cathode of the first diode is connected to one end of the third capacitor and an output end of a first supply voltage, and the other end of the third capacitor is grounded; the No. 2 pin and the No. 3 pin of the transformer are both grounded, the No. 4 pin of the transformer is connected with the anode of the second diode, the cathode of the second diode is connected with one end of the fourth capacitor and the output end of the second power supply voltage, and the other end of the fourth capacitor is grounded.
In the LLC power supply control circuit, the first switch module includes a first MOS transistor, a gate of the first MOS transistor is connected to an Up gate signal end of the LLC controller, a drain of the first MOS transistor is connected to the power supply, and a source of the first MOS transistor is connected to the second switch module and the voltage output module.
In the LLC power supply control circuit, the second switch module includes a second MOS transistor, a gate of the second MOS transistor is connected to a Low gate signal end of the LLC controller, a drain of the second MOS transistor is connected to a source of the first MOS transistor and the voltage output module, and the source of the second MOS transistor is grounded.
A power control apparatus comprising an LLC power control circuit as described above.
Compared with the prior art, the utility model provides a LLC power control circuit and power controlling means, LLC power control circuit includes control module, voltage output module, first switch module, second switch module and voltage regulation module, control module connects respectively first switch module, second switch module and voltage regulation module, first switch module and second switch module still with the voltage output module is connected, the voltage output module still with the voltage regulation module is connected; controlling the working states of the first switch module and the second switch module by the control module; when the first switch module is switched on and the second switch module is switched off, the adjusting module outputs a first feedback signal to the control module based on a first power supply voltage output by the voltage output module, and the control module controls the on-time of the first switch module based on the first feedback signal so as to adjust the first power supply voltage currently output by the voltage output module; when the first switch module is switched off and the second switch module is switched on, the adjusting module outputs a second feedback signal to the control module based on a second power supply voltage output by the voltage output module, and the control module controls the switching-on time of the second switch module based on the second feedback signal so as to adjust the second power supply voltage currently output by the voltage output module, thereby realizing the independent control or adjustment of the two paths of power supply voltages and meeting the power consumption requirements of power consumption equipment with different control requirements.
Drawings
Fig. 1 is a block diagram of the LLC power supply control circuit provided by the present invention;
fig. 2 is a schematic circuit diagram of the LLC power supply control circuit provided by the present invention;
fig. 3 is a waveform diagram of an input voltage of a 7 th pin of a transformer in the LLC power supply control circuit provided by the present invention;
fig. 4 is a waveform diagram of a first feedback signal and a second feedback signal in the LLC power supply control circuit provided by the present invention;
fig. 5 is the utility model provides an among the LLC power control circuit driving voltage of first MOS pipe, the charging voltage of first optoelectronic coupler, the driving voltage of second MOS pipe and the charging voltage's of second optoelectronic coupler wave form diagram.
Detailed Description
An object of the utility model is to provide a LLC power control circuit and power controlling means can realize independent control or regulation to multichannel supply voltage to satisfy the power consumption demand of the consumer that has different control demands.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, the present invention provides an LLC power control circuit, including a control module 100, a voltage output module 200, a first switch module 300, a second switch module 400 and a voltage regulation module 500, wherein the control module 100 is connected to the first switch module 300, the second switch module 400 and the voltage regulation module 500, the first switch module 300 and the second switch module 400 are further connected to the voltage output module 200, and the voltage output module 200 is further connected to the voltage regulation module 500.
The control module 100 controls the operating states of the first switch module 300 and the second switch module 400, where the operating states of the first switch module 300 and the second switch module 400 represent the on states of the first switch module 300 and the second switch module 400, and specifically, the control module 100 controls the first switch module 300 and the second switch module 400 to be alternately turned on or off instead of being turned on or off simultaneously, when the control module 100 controls the first switch module 300 to be turned on, the second switch module 400 is correspondingly controlled to be turned off, and when the control module 100 controls the first switch module 300 to be turned off, the second switch module 400 is correspondingly controlled to be turned on, so as to ensure that the supply voltage output by the voltage output module 200 is subsequently and independently controlled.
When the first switch module 300 is turned on and the second switch module 400 is turned off, the adjusting module 500 outputs a first feedback signal to the control module 100 based on the first supply voltage V1 output by the voltage output module 200, and the control module 100 controls the turn-on time of the first switch module 300 based on the first feedback signal to adjust the first supply voltage V1 currently output by the voltage output module 200; in specific implementation, when the first power supply voltage V1 decreases, the current output by the regulating module 500 decreases, and when the control module 100 detects a feedback signal with decreased current, i.e., a first feedback signal, the control module 100 controls the on-time of the first switching module 300 to increase, so that the first power supply voltage V1 output by the voltage output module 200 increases, thereby maintaining the stability of the first power supply voltage V1, and further improving the stability of the operation of the external power device.
When the first switch module 300 is turned off and the second switch module 400 is turned on, the adjusting module 500 outputs a second feedback signal to the control module 100 based on the second supply voltage V2 output by the voltage output module 200, and the control module 100 controls the turn-on time of the second switch module 400 based on the second feedback signal to adjust the second supply voltage V2 currently output by the voltage output module 200; in practical implementation, when the second power supply voltage V2 decreases, the current output by the regulating module 500 decreases, when the control module 100 detects a feedback signal of reduced current i.e. a second feedback signal, the control module 100 controls the on-time of the second switch module 400 to increase, so that the second supply voltage V2 output by the voltage output module 200 rises, thereby maintaining the stability of the second power supply voltage V2, further improving the stability of the operation of the external electric equipment, because the voltage output module 200 can output two independent power supply voltages, and the control module 100 controls the first switch module 300 and the second switch module 400 to operate alternately, the output adjustment of the first power supply voltage V1 and the second power supply voltage V2 are independent of each other and cannot affect each other, so that the power consumption requirements of power-consuming equipment with different control requirements can be met.
Further, please continue to refer to fig. 1, the adjusting module 500 includes a first adjusting unit 510 and a second adjusting unit 520, the first adjusting unit 510 is connected to the voltage output module 200 and the control module 100, respectively, and the second adjusting unit 520 is connected to the voltage output module 200 and the control module 100, respectively; the first regulating unit 510 outputs a first feedback signal to the control module 100 based on the first supply voltage V1; the second regulating unit 520 outputs a second feedback signal to the control module 100 based on the second supply voltage V2.
Specifically, the first adjusting unit 510 is connected to the output terminal of the first power supply voltage V1 of the voltage output module 200, the second adjusting unit 520 is connected to the output terminal of the second power supply voltage V2 of the voltage output module 200, when the first power supply voltage V1 decreases, the first adjusting unit 510 can independently output a first feedback signal to the control module 100, and the control module 100 controls the on-time of the first switch module 300 according to the first feedback signal, so that the first power supply voltage V1 output by the voltage output module 200 increases to maintain the stability of the first power supply voltage V1; when the second power supply voltage V2 decreases, the second feedback signal that can be individually output by the second adjusting unit 520 is sent to the control module 100, the control module 100 controls the on-time of the second switch module 400 according to the second feedback signal, so as to increase the second power supply voltage V2 output by the voltage output module 200, so as to maintain the stability of the second power supply voltage V2, the first adjusting unit 510 and the second adjusting unit 520 are individually connected to the output terminal of the first power supply voltage V1 and the output terminal of the second power supply voltage V2, so as to individually control and adjust the magnitudes of the first power supply voltage V1 and the second power supply voltage V2, without interfering with each other, thereby being able to meet the power consumption requirements of the power consumption devices with different control requirements.
In specific implementation, please refer to fig. 2, the first adjusting unit 510 includes a first error amplifier, a first photo coupler PC1 and a first switch K1, the 1 st pin and the 2 nd pin of the first photo coupler PC1 are connected to the first error amplifier, the 4 th pin of the first photo coupler PC1 is electrically connected to the first switch K1, the 3 rd pin of the first photo coupler PC1 is connected to the control module 100, and the first error amplifier is further connected to the voltage output module 200. The first error amplifier is used for sampling a first power supply voltage V1 and outputting the sampled first power supply voltage V1 to a first photoelectric coupler PC 1; the first photocoupler PC1 can charge the control module 100 by controlling the first switch K1, it should be noted that the first switch K1 is synchronous with the operating state of the first switch module 300, and according to fig. 3, after the first switch module 300 is closed, the first switch K1 is also closed, and after the first switch module 300 is closed under the control of the control module 100, the control module 100 enters a charging state, when the first supply voltage V1 decreases, the current output from the first photo-coupler PC1 also decreases, that is, the charging current of the control module 100 is decreased, and the corresponding charging time is increased, the on-time of the control module 100 controlling the first switch module 300 is also increased, the first supply voltage V1 outputted by the voltage output module 200 is increased, so as to maintain the stability of the first supply voltage V1.
Further, the second adjusting unit 520 includes a second error amplifier, a second photo coupler PC2 and a second switch K2, a 1 st pin and a 2 nd pin of the second photo coupler PC2 are connected to the second error amplifier, a 4 th pin of the second photo coupler PC2 is electrically connected to the second switch K2, a 3 rd pin of the second photo coupler PC2 is connected to the control module 100, and the second error amplifier is further connected to the voltage output module 200. Similarly, the second photocoupler PC2 can also control the second switch K2 to charge the control module 100, it should be noted that the second switch K2 is synchronized with the operating state of the second switch module 400, that is, after the second switch module 400 is closed, the second switch K2 is also closed, and after the second switch module 400 is closed under the control of the control module 100, that is, the control module 100 enters charging, when the second supply voltage V2 decreases, the current output from the second photo coupler PC2 also decreases, that is, the charging current of the control module 100 is decreased, and the corresponding charging time is increased, the on-time of the control module 100 controlling the second switch module 400 is also increased, the second supply voltage V2 outputted by the voltage output module 200 is increased, so as to maintain the stability of the second supply voltage V2.
Further, the adjusting module 500 further includes a first resistor R1, one end of the first resistor R1 is electrically connected, the other end of the first resistor R1 is respectively connected to one end of the first switch K1 and one end of the second switch K2, the first capacitor C1 is charged odd times through the first resistor R1, the first switch K1 and the first photocoupler PC1, the first capacitor C1 is charged even times through the first resistor R1, the second switch K2 and the second photocoupler PC2, and the first resistor R1 is a current-limiting resistor, that is, the existence of the first resistor R1 can ensure the charging safety, and improve the stability of the whole circuit operation.
Further, the control module 100 includes a first capacitor C1 and an LLC controller U1, one end of the first capacitor C1 is connected to the FB signal terminal of the LLC controller U1, the 3 rd pin of the first photocoupler PC1 and the 3 rd pin of the second photocoupler PC2, the other end of the first capacitor C1 is grounded, the Up gate signal terminal of the LLC controller U1 is connected to the first switch module 300, the Low gate signal terminal of the LLC controller U1 is connected to the second switch module 400, wherein the LLC controller U1 is configured to control the operating states of the first switch module 300 and the second switch module 400, since the LLC controller U1 controls the first switch module 300 and the second switch module 400 to operate alternately, the charging state of the first capacitor C1 is also performed alternately, and the charge and discharge of the first capacitor C1 is one working cycle of the LLC control circuit, preferably, when the first capacitor C1 is charged an odd number of times, the LLC controller U1 controls the first switch module 300 to conduct, when the first capacitor C1 is charged an even number of times, the LLC controller U1 controls the second switch module 400 to conduct, when the first capacitor C1 is charged to a predetermined value, the charging is stopped, the voltage across the first capacitor C1 is pulled down to 0V, and then the charging process of the next cycle or the next half cycle is started, namely by controlling the on-time of the first switching module 300 and the second switching module 400 by the control module 100 in combination with the regulating module 500, and then the stability of the first supply voltage V1 and the second supply voltage V2 is adjusted, the independent control and adjustment of the first supply voltage V1 and the second supply voltage V2 are realized, and the power consumption requirements of power consumption equipment with different control requirements can be further met.
Furthermore, the voltage output module 200 includes a transformer T1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first diode D1 and a second diode D2, wherein the 5 th pin of the transformer T1 is grounded through the second capacitor C2, the 7 th pin of the transformer T1 is connected to the first switch module 300 and the second switch module 400, the 1 st pin of the transformer T1 is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to one end of the third capacitor C3 and the output end of the first supply voltage V1, and the other end of the third capacitor C3 is grounded; the 2 nd pin and the 3 rd pin of the transformer T1 are both grounded, the 4 th pin of the transformer T1 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to one end of the fourth capacitor C4 and the output end of the second supply voltage V2, and the other end of the fourth capacitor C4 is grounded.
As shown in fig. 3, when the first power supply voltage V1 decreases, the 3 rd pin of the first photocoupler PC1 outputs a first feedback signal, so that the LLC controller U1 controls the on-time of the first switch module 300 to increase, and when the on-time of the first switch module 300 increases, the positive duty cycle of the input voltage waveform of the 7 th pin of the transformer T1 increases, the voltage applied to the second capacitor C2 increases, at this time, if the first capacitor C1 stops charging after the charging in the current half cycle is completed, the charging in the next half cycle is started, that is, the first switch module 300 is turned off, the second switch module 400 is turned on, the upper end of the N3 winding of the transformer T1, that is, the 5 th pin of the transformer T1, the lower end of the N3 winding of the transformer T1, that is, that the 7 th pin of the transformer T1 is a positive voltage end, then the voltage applied to the N3 winding of the transformer T1 will increase, and the first supply voltage V1 will increase, and meanwhile, according to the same name, when the second switch module 400 is turned on, the second diode D2 is turned off and the first diode D1 is turned on, the first supply voltage V1 is outputted, and the voltage of the N3 winding of the transformer T1 is changed by controlling the on-time of the first switch module 300, so as to adjust the first supply voltage V1.
Similarly, when the second power supply voltage V2 decreases, the low 3 pin of the second photo coupler PC2 outputs a second feedback signal, so that the LLC controller U1 controls the on-time of the second switch module 400 to increase, and when the on-time of the second switch module 400 increases, the positive duty cycle of the input voltage waveform of the 7 th pin of the transformer T1 increases, then the corresponding voltage applied to the second capacitor C2 increases, at this time, if the first capacitor C1 finishes charging in the current half cycle, the charging in the next half cycle is started, i.e., the second switch module 400 is turned off, the first switch module 300 is turned on, the upper end of the N3 winding of the transformer T1, i.e., the 5 th pin of the transformer T1, the lower end of the N3 winding of the transformer T1, i.e., the 7 th pin of the transformer T1, is a negative voltage end, then the voltage applied to the N3 winding of the transformer T1 increases, further, the second supply voltage V2 will rise, and meanwhile, according to the same name, when the first switch module 300 is turned on, the first diode D1 is turned off and the second diode D2 is turned on, the second supply voltage V2 is outputted, and the voltage of the N3 winding of the transformer T1 is changed by controlling the on-time of the second switch module 400, so as to further realize the adjustment of the second supply voltage V2, and accordingly, the waveforms of the first feedback signal and the second feedback signal are shown in fig. 4, and since the first switch module 300 and the second switch module 400 work alternately, the first feedback signal and the second feedback signal are outputted alternately.
Preferably, the first switch module 300 includes a first MOS transistor Q1, a gate of the first MOS transistor Q1 is connected to an Up gate signal end of the LLC controller U1, a drain of the first MOS transistor Q1 is electrically connected, a source of the first MOS transistor Q1 is connected to the second switch module 400 and the 7 th pin of the transformer T1, the second switch module 400 includes a second MOS transistor Q2, a gate of the second MOS transistor Q2 is connected to a Low gate signal end of the LLC controller U1, a drain of the second MOS transistor Q2 is connected to a source of the first MOS transistor Q1 and the 7 th pin of the transformer T1, and a source of the second MOS transistor Q2 is grounded.
The first switch and the first MOS transistor Q1 are synchronized, when the first capacitor C1 enters a charging state, the first switch K1 is turned on, and the first MOS transistor Q1 is turned on, that is, the first photocoupler PC1 charges the first capacitor C1, correspondingly, the charging voltage of the first photocoupler PC1 and the driving voltage of the first MOS transistor Q1 are as shown in fig. 5, when the on-time of the first MOS transistor Q1 is increased, the positive duty ratio of the input voltage waveform of the 7 th pin of the transformer T1 is increased, then the corresponding voltage Vc2 applied to the second capacitor C2 is increased, at this time, if the first capacitor C1 stops charging after the charging is completed in the current half cycle, that is, then the voltage Vc1 of the first capacitor C1 is 0; then, the first capacitor C1 enters the next half cycle of charging, the corresponding first MOS transistor Q1 is turned off, the second MOS transistor Q2 is turned on, the voltage applied to the N3 winding of the transformer T1 is increased, and the first power supply voltage V1 is increased, that is, the voltage of the N3 winding of the transformer T1 is changed by controlling the on-time of the first MOS transistor Q1, so that the first power supply voltage V1 is adjusted.
Similarly, the second switch K2 and the second MOS transistor Q2 are synchronized, when the first capacitor C1 enters the charging state of another half cycle, the second switch is turned on and the second MOS transistor Q2 is turned on, that is, the second photo-coupler PC2 charges the first capacitor C1, and correspondingly, the charging voltage of the second photo-coupler PC2 and the driving voltage of the second MOS transistor Q2 are as shown in fig. 5, when the on-time of the second MOS transistor Q2 increases, the positive duty cycle of the input voltage waveform of the 7 th pin of the transformer T1 increases, and then the corresponding voltage applied to the second capacitor C2, that is, Vc2, rises, and at this time, if the first capacitor C1 stops charging after the charging is completed in the current half cycle, that is, then the voltage Vc1 of the first capacitor C1 is 0; then the first capacitor C1 enters the charging of the next half period, the corresponding second MOS transistor Q2 is disconnected, when the first MOS transistor Q1 is turned on, the voltage across the N3 winding of the transformer T1 increases, and the second supply voltage V2 increases, namely, by controlling the conduction time of the second MOS transistor Q2, the voltage of the N3 winding of the transformer T1 is changed, thereby realizing the adjustment of the second supply voltage V2, the connection and disconnection of the first MOS transistor Q1 and the second MOS transistor Q2 can be controlled by the LLC controller U1 separately, and the first photocoupler PC1 and the second photocoupler PC2 are also respectively connected to the output terminal of the first supply voltage V1 and the output terminal of the second supply voltage V2, therefore the utility model discloses can realize that two way supply voltage carries out solitary control and regulation, and then can satisfy the consumer's that has different control demands power consumption demand.
Based on the LLC power supply control circuit, the present invention also provides a power supply control apparatus, which includes the LLC power supply control circuit as described above, and as the LLC power supply control circuit is described in detail above, it is not described here any more.
To sum up, the utility model relates to a LLC power control circuit and power controlling means, LLC power control circuit includes control module, voltage output module, first switch module, second switch module and voltage regulation module, control module connects respectively first switch module, second switch module and voltage regulation module, first switch module and second switch module still with voltage output module connects, voltage output module still with voltage regulation module connects; controlling the working states of the first switch module and the second switch module by the control module; when the first switch module is switched on and the second switch module is switched off, the adjusting module outputs a first feedback signal to the control module based on a first power supply voltage output by the voltage output module, and the control module controls the on-time of the first switch module based on the first feedback signal so as to adjust the first power supply voltage currently output by the voltage output module; when the first switch module is switched off and the second switch module is switched on, the adjusting module outputs a second feedback signal to the control module based on a second power supply voltage output by the voltage output module, and the control module controls the switching-on time of the second switch module based on the second feedback signal so as to adjust the second power supply voltage currently output by the voltage output module, so that the two paths of power supply voltages are independently controlled or adjusted to meet the power consumption requirements of the electric equipment with different control requirements.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.

Claims (9)

1. An LLC power supply control circuit is characterized by comprising a control module, a voltage output module, a first switch module, a second switch module and a voltage regulation module, wherein the control module is respectively connected with the first switch module, the second switch module and the voltage regulation module;
the control module controls the working states of the first switch module and the second switch module; when the first switch module is switched on and the second switch module is switched off, the adjusting module outputs a first feedback signal to the control module based on a first power supply voltage output by the voltage output module, and the control module controls the switching-on time of the first switch module based on the first feedback signal and is used for adjusting the first power supply voltage currently output by the voltage output module;
when the first switch module is switched off and the second switch module is switched on, the adjusting module outputs a second feedback signal to the control module based on a second power supply voltage output by the voltage output module, and the control module controls the on-time of the second switch module based on the second feedback signal and is used for adjusting the second power supply voltage currently output by the voltage output module.
2. The LLC power control circuit of claim 1, wherein said regulation module comprises a first regulation unit and a second regulation unit, said first regulation unit being connected to said voltage output module and said control module, respectively, said second regulation unit being connected to said voltage output module and said control module, respectively; the first adjusting unit outputs the first feedback signal to the control module based on the first power supply voltage; the second adjusting unit outputs the second feedback signal to the control module based on the second supply voltage.
3. The LLC power control circuit of claim 2, wherein said first regulating unit comprises a first error amplifier, a first photo coupler and a first switch, wherein pins 1 and 2 of said first photo coupler are connected to said first error amplifier, pin 4 of said first photo coupler is connected to power by said first switch, pin 3 of said first photo coupler is connected to said control module, and said first error amplifier is further connected to said voltage output module.
4. The LLC power control circuit of claim 2, wherein said second regulating unit comprises a second error amplifier, a second photo coupler and a second switch, wherein a 1 st pin and a 2 nd pin of said second photo coupler are connected to said second error amplifier, a 4 th pin of said second photo coupler is connected to power by said second switch, a 3 rd pin of said second photo coupler is connected to said control module, and said second error amplifier is further connected to said voltage output module.
5. The LLC power control circuit of claim 3, wherein said control module comprises a first capacitor and an LLC controller, one end of said first capacitor is connected to an FB signal terminal of said LLC controller, pin 3 of said first photocoupler and pin 3 of said second photocoupler, the other end of said first capacitor is grounded, an Upgate signal terminal of said LLC controller is connected to said first switch module, and a Low gate signal terminal of said LLC controller is connected to said second switch module.
6. The LLC power control circuit of claim 1, wherein said voltage output module comprises a transformer, a second capacitor, a third capacitor, a fourth capacitor, a first diode and a second diode, wherein a 5 th pin of said transformer is grounded via said second capacitor, a 7 th pin of said transformer is connected to said first switch module and said second switch module, a 1 st pin of said transformer is connected to an anode of said first diode, a cathode of said first diode is connected to one end of said third capacitor and an output terminal of said first supply voltage, and another end of said third capacitor is grounded; the No. 2 pin and the No. 3 pin of the transformer are both grounded, the No. 4 pin of the transformer is connected with the anode of the second diode, the cathode of the second diode is connected with one end of the fourth capacitor and the output end of the second power supply voltage, and the other end of the fourth capacitor is grounded.
7. The LLC power control circuit of claim 5, wherein the first switch module comprises a first MOS transistor, a gate of the first MOS transistor is connected to an Up gate signal terminal of the LLC controller, a drain of the first MOS transistor is connected to a power supply, and a source of the first MOS transistor is connected to the second switch module and the voltage output module.
8. The LLC power control circuit of claim 7, wherein said second switch module comprises a second MOS transistor, a gate of said second MOS transistor is connected to a Low gate signal terminal of said LLC controller, a drain of said second MOS transistor is connected to a source of said first MOS transistor and said voltage output module, and a source of said second MOS transistor is grounded.
9. A power supply control apparatus comprising the LLC power supply control circuit as claimed in any one of claims 1-8.
CN201921406456.2U 2019-08-27 2019-08-27 LLC power control circuit and power control device Active CN210629356U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201921406456.2U CN210629356U (en) 2019-08-27 2019-08-27 LLC power control circuit and power control device
PCT/CN2020/107646 WO2021036740A1 (en) 2019-08-27 2020-08-07 Llc power source control circuit and power source control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921406456.2U CN210629356U (en) 2019-08-27 2019-08-27 LLC power control circuit and power control device

Publications (1)

Publication Number Publication Date
CN210629356U true CN210629356U (en) 2020-05-26

Family

ID=70762958

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921406456.2U Active CN210629356U (en) 2019-08-27 2019-08-27 LLC power control circuit and power control device

Country Status (2)

Country Link
CN (1) CN210629356U (en)
WO (1) WO2021036740A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021036740A1 (en) * 2019-08-27 2021-03-04 深圳Tcl新技术有限公司 Llc power source control circuit and power source control device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10122534A1 (en) * 2001-05-09 2002-11-21 Philips Corp Intellectual Pty Resonant converter
EP1303032A3 (en) * 2001-09-04 2005-02-09 Philips Intellectual Property & Standards GmbH Control device for a resonant converter
JP5447651B2 (en) * 2010-03-16 2014-03-19 株式会社村田製作所 Switching power supply
CN108123604A (en) * 2017-12-28 2018-06-05 深圳Tcl新技术有限公司 Resonant power and electronic equipment
CN110391751A (en) * 2019-08-06 2019-10-29 深圳创维－Rgb电子有限公司 Double feedback digital power circuits and power supply
CN210629356U (en) * 2019-08-27 2020-05-26 深圳Tcl新技术有限公司 LLC power control circuit and power control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021036740A1 (en) * 2019-08-27 2021-03-04 深圳Tcl新技术有限公司 Llc power source control circuit and power source control device

Also Published As

Publication number Publication date
WO2021036740A1 (en) 2021-03-04

Similar Documents

Publication Publication Date Title
CN102231605B (en) Synchronous rectification control circuit of switch power supply secondary and flyback switch power supply
CN102055341B (en) Control circuit of switching power supply and switching power supply
CN102332827B (en) Power supply converter with electricity-saving mechanism and power supply conversion method
CN102969874A (en) A power converter control circuit with a deep burst mode
CN103813595A (en) Efficient power source capable of supplying electricity in constant voltage and constant current alternation mode
CN103066826B (en) Soft-start system of switching power supply converter
CN103219893A (en) Switch power supply controller and switch power supply circuit
CN103647448A (en) Integrated step-down-flyback type high power factor constant current circuit and device
CN203617902U (en) Integrated buck-flyback type high power factor constant current circuit and device
CN210629356U (en) LLC power control circuit and power control device
CN100530921C (en) Flyback pulse width modulation device with power-saving mode
CN203014666U (en) Quick start gate driving device and control module thereof
CN105307305A (en) LED power supply control device and TV set
CN106685246A (en) Turn-off extraction mutual inductance coupling type power supply system and method
CN109412436A (en) A kind of synchronous rectification control chip and circuit
CN207069906U (en) Controller for power-switching circuit
CN103269165B (en) The switching control circuit of power converter
KR101197078B1 (en) Zero voltage discharge circuit with active switching elements
CN106655761B (en) A kind of high gain boost DC converter
CN201383895Y (en) Power source supply device
US10205336B2 (en) Switched-mode power supply having at least one power circuit and at least one auxiliary power supply unit
KR20150077763A (en) Power supply and gate driver therein
CN209072364U (en) A kind of synchronous rectification control chip and circuit
CN113765365A (en) Control method of switching power supply and switching power supply
CN105576945A (en) Isolation power supply control device, power supply switching device, and isolation power supply control method thereof

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant