CN112311220A - PFC control circuit and power control device - Google Patents
PFC control circuit and power control device Download PDFInfo
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- CN112311220A CN112311220A CN201910683936.1A CN201910683936A CN112311220A CN 112311220 A CN112311220 A CN 112311220A CN 201910683936 A CN201910683936 A CN 201910683936A CN 112311220 A CN112311220 A CN 112311220A
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
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- 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
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Abstract
The invention discloses a PFC control circuit and a power supply control device, wherein the PFC control circuit is connected with electric equipment and comprises a power factor correction module, a half-bridge resonance module, an output voltage control module and a PFC control module; the power factor correction module processes commercial alternating current and outputs PFC voltage to the half-bridge resonance module; the half-bridge resonance module converts the PFC voltage into an output voltage and outputs the output voltage to a power consumption device; the output voltage control module controls the half-bridge resonance module to regulate the current voltage output to the electric equipment based on the current working state of the electric equipment; the PFC control module controls the PFC voltage output by the power factor correction module based on the current working state of the electric equipment to be matched with the current working state of the electric equipment, so that the standby power consumption of the electric equipment is effectively reduced, and the safety of a power supply circuit is improved.
Description
Technical Field
The invention relates to the technical field of electric appliances, in particular to a PFC control circuit and a power supply control device.
Background
In the existing television system, the power supply of the power supply to the movement is generally Vout1, and in order to reduce the standby power consumption, the standby voltage output by the power supply can be reduced to Vout2(Vout2 < Vout1) during standby; however, the existing scheme has a problem: when the power supply is operating normally, the PFC voltage is set to Vpfc1, and the output voltage Vout1 is designed according to Vpfc 1. When the LLC circuit is in standby, the output voltage is required to be changed into Vout2, but the output voltage Vout2 cannot be matched with Vpfc1, so that the working state of the LLC circuit is abnormal, and the power utilization safety cannot be guaranteed.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
The invention aims to provide a PFC control circuit and a power supply control device to solve the problem of power utilization safety.
In order to achieve the purpose, the invention adopts the following technical scheme:
a PFC control circuit is connected with electric equipment and comprises a power factor correction module, a half-bridge resonance module, an output voltage control module and a PFC control module; the power factor correction module is respectively connected with the half-bridge resonance module and the PFC control module, and the output voltage control module is respectively connected with the PFC control module and the half-bridge resonance module; the power factor correction module processes commercial alternating current and outputs PFC voltage to the half-bridge resonance module; the half-bridge resonance module converts the PFC voltage into an output voltage and outputs the output voltage to a power consumption device; the output voltage control module controls the half-bridge resonance module to regulate the current voltage output to the electric equipment based on the current working state of the electric equipment; the PFC control module controls the PFC voltage output by the power factor correction module to be matched with the current working state of the electric equipment based on the current working state of the electric equipment.
The PFC control circuit further comprises a rectifying module, wherein the rectifying module is connected with the power factor correction module and a commercial alternating current input end and is used for rectifying the commercial alternating current and outputting the rectified commercial alternating current to the power factor correction module.
In the PFC control circuit, the PFC control module is specifically configured to control the power factor correction module to output a first PFC voltage to the half-bridge resonant module when the electric device is in a non-standby state; and when the electric equipment is in a standby state, the power factor correction module is controlled to output a second PFC voltage to the half-bridge resonance module.
In the PFC control circuit, the output voltage control module is specifically configured to control the half-bridge resonance module to output a first output voltage to the electrical device when the electrical device is in a non-standby state; and when the electric equipment is in a standby state, the half-bridge resonance module is controlled to output a second output voltage to the electric equipment.
In the PFC control circuit, the PFC control module comprises a first triode and a first photoelectric coupler, the base electrode of the first triode is connected with a POWER ON signal end, the emitting electrode of the first triode is grounded, the collecting electrode of the first triode is connected with the 2 nd pin of the first photoelectric coupler, the 1 st pin of the first photoelectric coupler is connected with the output voltage control module, the 3 rd pin of the first photoelectric coupler is grounded, and the 4 th pin of the first photoelectric coupler is connected with the POWER factor correction module.
In the PFC control circuit, the output voltage control module comprises a second triode, a first resistor, a second resistor, a third resistor, a shunt reference source and a second photoelectric coupler; the base electrode of the second triode is connected with the POWER ON signal end, the emitting electrode of the second triode is grounded, the collecting electrode of the second triode is connected with one end of the second resistor, one end of the third resistor and the feedback pin of the shunt reference source through the first resistor, the positive electrode of the shunt reference source is grounded, the negative electrode of the shunt reference source is connected with the 2 nd pin of the second photoelectric coupler, the 1 st pin of the second photoelectric coupler is connected with the PFC control module, the 3 rd pin of the second photoelectric coupler is grounded, and the 4 th pin of the second photoelectric coupler is connected with the half-bridge resonance module.
In the PFC control circuit, the power factor correction module comprises a fourth resistor, a fifth resistor, a sixth resistor, a PFC control chip, a first MOS (metal oxide semiconductor) tube, a first diode, a first capacitor and an inductor; one end of the fourth resistor is connected with a pin 4 of the first photoelectric coupler, the other end of the fourth resistor is connected with one end of the fifth resistor, one end of the sixth resistor and an FB signal end of the PFC control chip, the other end of the fifth resistor is grounded, the other end of the sixth resistor, a cathode of the first diode and one end of the first capacitor are connected with the half-bridge resonance module, an anode of the first diode is connected with one end of the inductor and a drain electrode of the first MOS tube, the other end of the first capacitor is grounded, a source electrode of the first MOS tube is grounded, a grid electrode of the first MOS tube is connected with a GATE signal end of the PFC control chip, and the other end of the inductor is connected with the rectification module.
In the PFC control circuit, the half-bridge resonance module comprises a seventh resistor, an LLC control chip, a second MOS tube, a third MOS tube, a transformer, a second diode, a third diode, a second capacitor and a third capacitor; one end of the seventh resistor is connected with a pin 4 of the second photoelectric coupler, the other end of the seventh resistor is connected with an FB signal end of the LLC control chip, a grid electrode of the second MOS tube is connected with an UPGATE signal end of the LLC control chip, a grid electrode of the third MOS tube is connected with a DOWNATE signal end of the LLC control chip, a drain electrode of the second MOS tube is connected with the power factor correction module, a source electrode of the second MOS tube is connected with a pin 1 of the transformer and a drain electrode of the third MOS tube, and a source electrode of the third MOS tube is grounded; the 2 nd pin of the transformer is grounded through the second capacitor, the 3 rd pin of the transformer is connected with the anode of the third diode, the 4 th pin and the 5 th pin of the transformer are both grounded, the 6 th pin of the transformer is connected with the anode of the second diode, the cathode of the third diode and one end of the third capacitor are all connected with the voltage output end, and the other end of the third capacitor is grounded.
In the PFC control circuit, the rectifying module comprises a fourth diode, a fifth diode, a sixth diode and a seventh diode, the anode of the fourth diode and the cathode of the sixth diode are both connected with a live wire end of the commercial alternating current, the anode of the fifth diode and the cathode of the seventh diode are both connected with a zero line end N of the commercial alternating current, the cathode of the fourth diode and the cathode of the fifth diode are both connected with the power factor correction module, and the anode of the sixth diode and the anode of the seventh diode are both grounded.
A power supply control device comprising a PFC control circuit as described above.
Compared with the prior art, the invention provides a PFC control circuit and a power control device, wherein the PFC control circuit is connected with electric equipment and comprises a power factor correction module, a half-bridge resonance module, an output voltage control module and a PFC control module; the power factor correction module is used for processing commercial alternating current and then outputting PFC voltage to the half-bridge resonance module; the half-bridge resonance module converts the PFC voltage into an output voltage and outputs the output voltage to a power consumption device; the output voltage control module controls the half-bridge resonance module to regulate the current voltage output to the electric equipment based on the current working state of the electric equipment; the PFC control module controls the PFC voltage output by the power factor correction module based on the current working state of the electric equipment to be matched with the current working state of the electric equipment, so that the standby power consumption of the electric equipment is effectively reduced, and the safety of a power supply circuit is improved.
Drawings
Fig. 1 is a block diagram of a PFC control circuit according to the present invention;
fig. 2 is a schematic circuit diagram of a PFC control circuit according to the present invention.
Detailed Description
The invention aims to provide a PFC control circuit and a PFC control device to solve the problem of power utilization safety.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the PFC control circuit according to the present invention is connected to an electric device 10, and includes a power factor correction module 100, a half-bridge resonant module 200, an output voltage control module 300, and a PFC control module 400; the power factor correction module 100 is respectively connected to the half-bridge resonant module 200 and the PFC control module 400, and the output voltage control module 300 is respectively connected to the PFC control module 400 and the half-bridge resonant module 200; the power factor correction module 100 processes commercial alternating current and outputs PFC voltage to the half-bridge resonant module 200; the half-bridge resonant module 200 converts the PFC voltage into an output voltage and outputs the output voltage to the electric device 10; the output voltage control module 300 controls the half-bridge resonance module 200 to adjust the voltage currently output to the electric device based on the current working state of the electric device 10; the PFC control module controls the PFC voltage output by the power factor correction module 100 to adapt to the current operating state of the electric device 10 based on the current operating state of the electric device 10.
In the present invention, the PFC control circuit is configured to provide electric energy for an external electric device 10, in this embodiment, preferably, the electric device 10 is a television, after the television is powered on, the power factor correction module 100 performs boost filtering on commercial alternating current, and outputs a PFC voltage to the half-bridge resonance module 200, so that the half-bridge resonance module 200 converts the PFC voltage into an output voltage, where the output voltage is an ideal PFC voltage, and then the half-bridge resonance module 200 outputs the output voltage to the electric device 10 to provide electric energy for the electric device 10; correspondingly, the output voltage control module 300 is configured to control the half-bridge resonance module 200 to adjust the voltage currently output to the electrical device 10 according to the current working state of the electrical device 10, and the PFC control module 400 controls the PFC voltage output by the power factor correction module 100 according to the current working state of the electrical device 10 to adapt to the current working state of the electrical device 10, so that the electrical device 10 can normally work, the standby power consumption of the electrical device 10 can be effectively reduced, and the safety of the power supply circuit is improved.
Further, the PFC control module 400 is specifically configured to control the power factor correction module 100 to output a first PFC voltage to the half-bridge resonant module 200 when the electrical device 10 is in a non-standby state; and when the electric device 10 is in a standby state, the power factor correction module 100 is controlled to output a second PFC voltage to the half-bridge resonant module 200.
That is, when the television is in a normal operating state, the PFC control module 400 is in an on state, so that the power factor correction module 100 outputs a first PFC voltage to the half-bridge resonant module 200, and when the television is in a standby state, the PFC control module 400 is correspondingly in an off state, so that the power factor correction module 100 outputs a second PFC voltage to the half-bridge resonant module 200, that is, the PFC voltage is adjusted according to different operating states of the television, and thus, power consumption can be effectively reduced.
Further, the output voltage control module 300 is specifically configured to control the half-bridge resonant module 200 to output a first output voltage to the electrical device 10 when the electrical device 10 is in a non-standby state; and when the electric device 10 is in a standby state, the half-bridge resonant module 200 is controlled to output a second output voltage to the electric device 10.
Correspondingly, when the television is in a normal operating state, the output voltage control module 300 is turned on, so as to control the half-bridge resonance module 200 to convert the first PFC voltage into an ideal PFC voltage, i.e., a first output voltage, to the electric device 10, so as to ensure power supply of the television; when the television enters a standby state, in order to reduce power consumption, the half-bridge resonant module 200 needs to output a second output voltage to the television, where the second output voltage is smaller than the first output voltage, and in order to ensure normal operation of the power supply circuit, the PFC control module 400 needs to control the power factor correction module 100 to output a second PFC voltage, and then the output voltage control module 300 controls the half-bridge resonant module 200 to convert the second PFC voltage into the second output voltage and output the second output voltage to the television, that is, the required output voltage is adapted by adjusting the magnitude of the PFC voltage, so that standby power consumption can be effectively reduced, and the power supply circuit can also operate normally.
Further, the PFC control circuit further includes a rectifying module 500, and the rectifying module 500 is connected to the power factor correction module 100 and an ac input terminal, and is configured to rectify and output the commercial ac to the power factor correction module 100.
That is, the rectification module 500 rectifies the sine wave of the commercial ac 220Vac to obtain a steamed bread wave, and correspondingly, the PFC control module 400 also performs voltage boosting and filtering on the steamed bread wave to obtain a dc voltage, that is, a PFC voltage; therefore, the half-bridge resonant module 200 converts the PFC voltage into an ideal PFC voltage to provide power for the tv, so as to ensure that the tv obtains the required operating voltage.
In specific implementation, referring to fig. 2, the PFC control module 400 includes a first transistor Q1 and a first photo coupler PC1, a base of the first transistor Q1 is connected to a POWER ON signal terminal, an emitter of the first transistor Q1 is grounded, a collector of the first transistor Q1 is connected to a 2 nd pin of the first photo coupler PC1, a 1 st pin of the first photo coupler PC1 is connected to the output voltage control module 300, a 3 rd pin of the first photo coupler PC1 is grounded, and a 4 th pin of the first photo coupler PC1 is connected to the POWER factor correction module 100.
When the television normally works, the POWER ON signal end is at a high level, at this time, the first triode Q1 is turned ON, and the 4 th pin of the first photoelectric coupler PC1 is turned ON to the ground, so that the PFC control module 400 outputs a first PFC voltage; when the television is in a standby state, the POWER ON signal end is at a low level, the first triode Q1 is turned off, the low 3 pin and the 4 th pin of the first photoelectric coupler PC1 are disconnected, and the PFC control module 400 outputs a second PFC voltage, so that the PFC voltage is controlled according to the operating state of the television, and the normal operation of the POWER supply circuit is ensured while the standby POWER consumption is reduced.
Further, the output voltage control module 300 includes a second transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3, a shunt reference source U11, and a second photo coupler PC 2; the base of the second triode Q2 is connected to the POWER ON signal terminal, the emitter of the second triode Q2 is grounded, the collector of the second triode Q2 is connected to one end of the second resistor R2, one end of the third resistor R3 and the feedback pin of the shunt reference source U11 through the first resistor R1, the positive electrode of the shunt reference source U11 is grounded, the negative electrode of the shunt reference source U11 is connected to the 2 nd pin of the second photo coupler PC2, the 1 st pin of the second photo coupler PC2 is connected to the 4 th pin of the first photo coupler PC1, the 3 rd pin of the second photo coupler PC2 is grounded, and the 4 th pin of the second photo coupler PC2 is connected to the half-bridge resonant module 200.
Similarly, when the television normally works, the POWER ON signal end is at a high level, the second triode Q2 is turned ON, the first resistor R1 is connected to the circuit to participate in the feedback of the signal, and then the feedback signal is transmitted to the half-bridge resonance module 200 through the second photocoupler PC2, so that the half-bridge resonance module 200 outputs a first output signal to the television according to the first PFC signal; when the television enters a standby state, the POWER ON signal end is at a low level, the second triode Q2 is turned off, the first resistor R1 and the third resistor R3 are connected in parallel, and then the corresponding feedback information is output to the half-bridge resonance module 200 through the second photoelectric coupler PC2, so that the half-bridge resonance module 200 outputs a second output voltage to the television according to the second PFC voltage, thereby effectively reducing the standby POWER consumption.
Further, the power factor correction module 100 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a PFC control chip U1, a first MOS transistor M1, a first diode D1, a first capacitor C1, and an inductor L1; one end of the fourth resistor R4 is connected to the pin 4 of the first photocoupler PC1, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5, one end of the sixth resistor R6 and the FB signal end of the PFC control chip U1, the other end of the fifth resistor R5 is grounded, the other end of the sixth resistor R6, the negative electrode of the first diode D1 and one end of the first capacitor C1 are all connected to the half-bridge resonant module 200, the positive electrode of the first diode D1 is connected to one end of the inductor L1 and the drain of the first MOS transistor M1, the other end of the first capacitor C1 is grounded, the source of the first MOS transistor M1 is grounded, the GATE of the first MOS transistor M1 is connected to the GATE of the GATE signal end of the PFC control chip U1, and the other end of the inductor L1 is connected to the rectifying module 500.
That is, after the first triode Q1 is turned on, the 4 th pin of the first photocoupler PC1 is grounded through the fourth resistor R4 and the fifth resistor R5, the fourth resistor R4 and the fifth resistor R5 are in a parallel state, and the PFC control chip U1 correspondingly outputs a first PFC voltage to the half-bridge resonant module 200 after detecting a feedback signal; when the first triode Q1 is cut off, the 3 rd pin and the 4 th pin of the first photoelectric coupler PC1 are turned off, only the fifth resistor R5 is connected to the circuit at this time, and participates in the feedback of the signal, and the PFC control chip U1 correspondingly outputs a second PFC voltage to the half-bridge resonant module 200 after detecting the feedback signal at this time; therefore, the PFC voltage is adjusted to meet the electric energy requirements of the television in different states, and the power consumption can be effectively reduced.
Further, the half-bridge resonant module 200 includes a seventh resistor R7, an LLC control chip U2, a second MOS transistor M2, a third MOS transistor M3, a transformer T1, a second diode D2, a third diode D3, a second capacitor C2, and a third capacitor C3; one end of the seventh resistor R7 is connected to the 4 th pin of the second photocoupler PC2, the other end of the seventh resistor R7 is connected to the FB signal terminal of the LLC control chip U2, the gate of the second MOS transistor M2 is connected to the update signal terminal of the LLC control chip U2, the gate of the third MOS transistor M3 is connected to the download signal terminal of the LLC control chip U2, the drain of the second MOS transistor M2 is connected to the power factor correction module 100, the source of the second MOS transistor M2 is connected to the 1 st pin of the transformer T1 and the drain of the third MOS transistor M3, and the source of the third MOS transistor M3 is grounded; the 2 nd pin of the transformer T1 is grounded through the second capacitor C2, the 3 rd pin of the transformer T1 is connected to the anode of the third diode D3, the 4 th pin and the 5 th pin of the transformer T1 are both grounded, the 6 th pin of the transformer T1 is connected to the anode of the second diode D2, the cathode of the second diode D2, the cathode of the third diode D3 and one end of the third capacitor C3 are both connected to a voltage output end, and the other end of the third capacitor C3 is grounded.
Correspondingly, when the second triode Q2 is turned on, the first resistor R1 is connected to a circuit for feedback, at this time, the second photocoupler PC2 outputs feedback information to the LLC control chip U2, the LLC control chip U2 controls to convert the first PFC voltage into a first output voltage, and the first PFC voltage is output to the television, and the television is in a normal working state; when the second triode Q2 is turned off, the first resistor R1 and the third resistor R3 are connected in parallel, at this time, the second photocoupler PC2 outputs corresponding feedback information to the LLC control chip U2, the LLC control chip U2 controls to convert the second PFC voltage into a second output voltage to the television, and the television is in a standby state, that is, no matter the television is in a normal working state or in a standby state, there are corresponding output voltages and a PFC voltage adapted to the output voltages, so that the normal working of the power supply circuit can be ensured while the standby power consumption is effectively reduced.
Preferably, the rectifying module 500 includes a fourth diode D4, a fifth diode D5, a sixth diode D6 and a seventh diode D7, an anode of the fourth diode D4 and a cathode of the sixth diode D6 are both connected to a live line end L of the commercial alternating current, an anode of the fifth diode D5 and a cathode of the seventh diode D7 are both connected to the commercial cathode and are both connected to the power factor correction module 100, and an anode of the sixth diode D6 and an anode of the seventh diode D7 are both grounded.
Namely, the fourth diode D4, the fifth diode D5, the sixth diode D6 and the seventh diode D7 form a bridge stack, which rectifies the sine wave of the commercial alternating current 220Vac into a steamed bread wave and outputs the steamed bread wave to the power factor correction module 100, thereby providing a required voltage for the external electric equipment 10 and ensuring the normal operation of the electric equipment 10.
Based on the PFC control circuit, the present invention further provides a power control apparatus, which includes the PFC control circuit, and the PFC control circuit is not described in detail herein since the PFC control circuit is described in detail above.
In summary, the PFC control circuit and the power control apparatus provided by the present invention, wherein the PFC control circuit is connected to an electric device, and includes a power factor correction module, a half-bridge resonance module, an output voltage control module, and a PFC control module; the power factor correction module outputs PFC voltage to the half-bridge resonance module after processing commercial alternating current, the half-bridge resonance module converts the PFC voltage into output voltage and outputs the output voltage to electric equipment, the output voltage control module controls the half-bridge resonance module to adjust the voltage currently output to the electric equipment based on the current working state of the electric equipment, and the PFC control module controls the PFC voltage output by the power factor correction module based on the current working state of the electric equipment to be adaptive to the current working state of the electric equipment, so that standby power consumption of the electric equipment is effectively reduced, and safety of a power supply circuit is improved.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. A PFC control circuit is connected with electric equipment and is characterized by comprising a power factor correction module, a half-bridge resonance module, an output voltage control module and a PFC control module; the power factor correction module is respectively connected with the half-bridge resonance module and the PFC control module, and the output voltage control module is respectively connected with the PFC control module and the half-bridge resonance module; the power factor correction module processes commercial alternating current and outputs PFC voltage to the half-bridge resonance module; the half-bridge resonance module converts the PFC voltage into an output voltage and outputs the output voltage to a power consumption device; the output voltage control module controls the half-bridge resonance module to regulate the current voltage output to the electric equipment based on the current working state of the electric equipment; the PFC control module controls the PFC voltage output by the power factor correction module to be matched with the current working state of the electric equipment based on the current working state of the electric equipment.
2. The PFC control circuit according to claim 1, further comprising a rectifying module, wherein the rectifying module is connected to the power factor correction module and a mains alternating current input terminal, and is configured to rectify and output the mains alternating current to the power factor correction module.
3. The PFC control circuit of claim 2, wherein the PFC control module is specifically configured to control the power factor correction module to output a first PFC voltage to the half-bridge resonant module when the powered device is in a non-standby state; and when the electric equipment is in a standby state, the power factor correction module is controlled to output a second PFC voltage to the half-bridge resonance module.
4. The PFC control circuit of claim 2, wherein the output voltage control module is specifically configured to control the half-bridge resonant module to output a first output voltage to the electrical device when the electrical device is in a non-standby state; and when the electric equipment is in a standby state, the half-bridge resonance module is controlled to output a second output voltage to the electric equipment.
5. The PFC control circuit of claim 3, wherein the PFC control module comprises a first triode and a first optocoupler, wherein a base of the first triode is connected to a POWER signal terminal, an emitter of the first triode is grounded, a collector of the first triode is connected to a pin 2 of the first optocoupler, a pin 1 of the first optocoupler is connected to the output voltage control module, a pin 3 of the first optocoupler is grounded, and a pin 4 of the first optocoupler is connected to the power factor correction module.
6. The PFC control circuit of claim 4, wherein the output voltage control module comprises a second triode, a first resistor, a second resistor, a third resistor, a shunt reference source, and a second optocoupler; the base of the second triode is connected with a POWER ON signal end, the emitting electrode of the second triode is grounded, the collecting electrode of the second triode is connected with one end of the second resistor, one end of the third resistor and the feedback pin of the shunt reference source through the first resistor, the positive electrode of the shunt reference source is grounded, the negative electrode of the shunt reference source is connected with the 2 nd pin of the second photoelectric coupler, the 1 st pin of the second photoelectric coupler is connected with the PFC control module, the 3 rd pin of the second photoelectric coupler is grounded, and the 4 th pin of the second photoelectric coupler is connected with the half-bridge resonance module.
7. The PFC control circuit of claim 5, wherein the power factor correction module comprises a fourth resistor, a fifth resistor, a sixth resistor, a PFC control chip, a first MOS transistor, a first diode, a first capacitor and an inductor; one end of the fourth resistor is connected with a pin 4 of the first photoelectric coupler, the other end of the fourth resistor is connected with one end of the fifth resistor, one end of the sixth resistor and an FB signal end of the PFC control chip, the other end of the fifth resistor is grounded, the other end of the sixth resistor, a cathode of the first diode and one end of the first capacitor are connected with the half-bridge resonance module, an anode of the first diode is connected with one end of the inductor and a drain electrode of the first MOS tube, the other end of the first capacitor is grounded, a source electrode of the first MOS tube is grounded, a grid electrode of the first MOS tube is connected with a GATE signal end of the PFC control chip, and the other end of the inductor is connected with the rectification module.
8. The PFC control circuit of claim 6, wherein the half-bridge resonant module comprises a seventh resistor, an LLC control chip, a second MOS transistor, a third MOS transistor, a transformer, a second diode, a third diode, a second capacitor and a third capacitor; one end of the seventh resistor is connected with a pin 4 of the second photoelectric coupler, the other end of the seventh resistor is connected with an FB signal end of the LLC control chip, a grid electrode of the second MOS tube is connected with an UPGATE signal end of the LLC control chip, a grid electrode of the third MOS tube is connected with a DOWNATE signal end of the LLC control chip, a drain electrode of the second MOS tube is connected with the power factor correction module, a source electrode of the second MOS tube is connected with a pin 1 of the transformer and a drain electrode of the third MOS tube, and a source electrode of the third MOS tube is grounded; the 2 nd pin of the transformer is grounded through the second capacitor, the 3 rd pin of the transformer is connected with the anode of the third diode, the 4 th pin and the 5 th pin of the transformer are both grounded, the 6 th pin of the transformer is connected with the anode of the second diode, the cathode of the third diode and one end of the third capacitor are all connected with the voltage output end, and the other end of the third capacitor is grounded.
9. The PFC control circuit according to claim 2, wherein the rectification module comprises a fourth diode, a fifth diode, a sixth diode and a seventh diode, the anode of the fourth diode and the cathode of the sixth diode are both connected to a live wire end of the commercial alternating current, the anode of the fifth diode and the cathode of the seventh diode are both connected to a neutral wire end of the commercial alternating current, the cathode of the fourth diode and the cathode of the fifth diode are both connected to the power factor correction module, and the anode of the sixth diode and the anode of the seventh diode are both grounded.
10. A power supply control device comprising the PFC control circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910683936.1A CN112311220B (en) | 2019-07-26 | 2019-07-26 | PFC control circuit and power supply control device |
Applications Claiming Priority (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115313863A (en) * | 2022-08-08 | 2022-11-08 | 深圳创客恒源科技有限公司 | Circuit and method for adjusting PFC (power factor correction) and LLC (logical link control) topology output voltage based on output requirement |
| WO2024109413A1 (en) * | 2022-11-24 | 2024-05-30 | 南京泉峰科技有限公司 | Power supply apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100135050A1 (en) * | 2008-10-28 | 2010-06-03 | Fuji Electric Systems Co., Ltd. | Switching power supply control circuit |
| CN103281852A (en) * | 2013-06-04 | 2013-09-04 | 宁波远东照明有限公司 | Electronic ballast for fluorescent lamp |
| CN104010148A (en) * | 2014-05-26 | 2014-08-27 | 深圳创维－Rgb电子有限公司 | Power circuit and television |
| CN104935843A (en) * | 2015-06-16 | 2015-09-23 | 康佳集团股份有限公司 | LED (Light-Emitting Diode) television two-in-one power supply circuit and LED television |
| CN107197185A (en) * | 2017-07-26 | 2017-09-22 | 深圳市华星光电技术有限公司 | A kind of power supply for LCD TV |
| JP2018068117A (en) * | 2018-02-05 | 2018-04-26 | 東芝ライテック株式会社 | Power supply circuit and illumination device |
-
2019
- 2019-07-26 CN CN201910683936.1A patent/CN112311220B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100135050A1 (en) * | 2008-10-28 | 2010-06-03 | Fuji Electric Systems Co., Ltd. | Switching power supply control circuit |
| CN103281852A (en) * | 2013-06-04 | 2013-09-04 | 宁波远东照明有限公司 | Electronic ballast for fluorescent lamp |
| CN104010148A (en) * | 2014-05-26 | 2014-08-27 | 深圳创维－Rgb电子有限公司 | Power circuit and television |
| CN104935843A (en) * | 2015-06-16 | 2015-09-23 | 康佳集团股份有限公司 | LED (Light-Emitting Diode) television two-in-one power supply circuit and LED television |
| CN107197185A (en) * | 2017-07-26 | 2017-09-22 | 深圳市华星光电技术有限公司 | A kind of power supply for LCD TV |
| JP2018068117A (en) * | 2018-02-05 | 2018-04-26 | 東芝ライテック株式会社 | Power supply circuit and illumination device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115313863A (en) * | 2022-08-08 | 2022-11-08 | 深圳创客恒源科技有限公司 | Circuit and method for adjusting PFC (power factor correction) and LLC (logical link control) topology output voltage based on output requirement |
| WO2024109413A1 (en) * | 2022-11-24 | 2024-05-30 | 南京泉峰科技有限公司 | Power supply apparatus |
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|---|---|
| CN112311220B (en) | 2023-08-01 |
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