CN110707918A - PFC AC/DC converter control circuit of integrated power decoupling circuit - Google Patents

PFC AC/DC converter control circuit of integrated power decoupling circuit Download PDF

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Publication number
CN110707918A
CN110707918A CN201910953241.0A CN201910953241A CN110707918A CN 110707918 A CN110707918 A CN 110707918A CN 201910953241 A CN201910953241 A CN 201910953241A CN 110707918 A CN110707918 A CN 110707918A
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China
Prior art keywords
module
circuit
starting
power supply
control
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Pending
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CN201910953241.0A
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Chinese (zh)
Inventor
吴翠娟
李冬
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Suzhou Institute of Trade and Commerce
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Suzhou Institute of Trade and Commerce
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Priority to CN201910953241.0A priority Critical patent/CN110707918A/en
Publication of CN110707918A publication Critical patent/CN110707918A/en
Pending legal-status Critical Current

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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
    • H02M1/4258—Arrangements for improving power factor of AC input using a single converter stage both for correction of AC input power factor and generation of a regulated and galvanically isolated DC output voltage
    • 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
    • H02M1/36—Means for starting or stopping converters
    • 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
    • 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
    • H02M1/0048—Circuits or arrangements for reducing losses
    • 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

Abstract

The invention discloses a PFC AC/DC converter control circuit of an integrated power decoupling circuit, which comprises a decoupling circuit and an AC/DC converter; the decoupling circuit comprises a power supply, a resonant decoupling circuit transmitting part, a resonant decoupling circuit receiving part and a load; the AC/DC converter comprises a flyback transformer, a rectifying and filtering module, a starting circuit, a starting control and low-voltage locking module, a peak current detection module, a sampling and holding module, an error amplifier, a CV control module, a demagnetization time detection module, a CC control module, a PFM logic control module, a driving module and a power switch tube M1. The power consumption of the starting part is greatly reduced; the invention adopts the close-sealing triode to realize starting, has low standby power consumption and high speed, adopts the close-sealing technology, does not need a high-pressure process, is easy to realize and saves the cost; when the output is short-circuited, the system automatically enters a fixed frequency mode, so that the stability is improved.

Description

PFC AC/DC converter control circuit of integrated power decoupling circuit
Technical Field
The invention belongs to the field of circuit control, and particularly relates to a PFC AC/DC converter control circuit integrated with a power decoupling circuit.
Background
The storage battery is widely applied to various industrial fields and daily life of people, and the service life of the storage battery is closely related to undercharge, overcharge and overdischarge. How to effectively ensure and improve the service life of the storage battery is an urgent problem to be solved in the design of a storage battery management system.
The design of the storage battery management system is mainly carried out from two aspects of charging and discharging, and the charging and discharging control strategies adopted in different application scenes are also emphasized respectively. At present, a charging strategy mainly adopts three-section charging, and hotter researches mainly adopt pulse charging, aiming at avoiding undercharging and overcharging of a storage battery; the discharge strategy mainly adopts a mode of setting threshold voltage, and aims to avoid over discharge of the storage battery.
Switching power supplies are widely used in almost all electronic devices due to their small size, light weight, and high efficiency, and are an indispensable power supply for the rapid development of the electronic information industry. The primary side feedback switching power supply saves space on a system board due to the fact that a structure of an optocoupler and a TL431 is omitted, reduces cost, improves reliability of the system, and is rapidly developed and widely applied in power supply management;
in a single-phase AC/DC converter in a power system, such as a single-phase photovoltaic inverter, a single-phase uninterruptible power supply and the like, if the current sine of the AC power grid side is ensured, the DC side of the converter inevitably has low-frequency power fluctuation of the voltage frequency of a secondary power grid. Without filtering out this inherent secondary ripple power in a single-phase system, this secondary ripple power can cause low-frequency ripple of the dc side voltage, which in many applications will cause different levels of damage, for example, significantly reducing the efficiency of the photovoltaic panel, reducing the life of the dc side battery, or causing the input current to have third harmonic.
Disclosure of Invention
The invention aims to solve the technical problem of providing a PFC AC/DC converter control circuit integrated with a power decoupling circuit aiming at the background deficiency, thereby omitting an external starting circuit and greatly reducing the power consumption of a starting part.
The invention adopts the following technical scheme for solving the technical problems:
a PFC AC/DC converter control circuit integrated with a power decoupling circuit comprises the decoupling circuit and an AC/DC converter; the decoupling circuit comprises a power supply, a resonant decoupling circuit transmitting part, a resonant decoupling circuit receiving part and a load; the power supply comprises a charging control circuit and a rechargeable battery; the charging control circuit comprises a signal control end, a charging power end, an equipment power supply end, a battery end, a triode, a first MOS (metal oxide semiconductor) tube and a second MOS tube;
the charging power supply end is grounded through a first resistor and a second resistor which are connected in series; the base electrode of the triode is respectively connected with the signal control end and the charging power supply end, the collector electrode of the triode is connected with the grid electrode of the second MOS tube through a fourth resistor and is also connected with the source electrode of the first MOS tube through a third resistor, and the emitting electrode of the triode is grounded; the source electrode of the second MOS tube is connected with the charging power supply end through a first diode, and the drain electrode of the second MOS tube is connected with the equipment power supply end; the source electrode of the first MOS tube is connected with the charging power supply end through a first diode, the grid electrode of the first MOS tube is connected with the connection point of the first resistor and the second resistor, and the drain electrode of the first MOS tube is connected with the battery end;
the AC/DC converter comprises a flyback transformer, a rectifying and filtering module, a starting circuit, a starting control and low-voltage locking module, a peak current detection module, a sample holding module, an error amplifier, a CV control module, a demagnetization time detection module, a CC control module, a PFM logic control module, a driving module and a power switch tube M1; the starting circuit comprises a power switch tube Q1, the upper end of a primary winding Np of the flyback transformer is connected with an external input voltage Vin end, and the lower end of the primary winding Np is connected with the starting circuit; the secondary winding Ns of the flyback transformer is connected with an external rectification filter module; the auxiliary winding Naux of the transformer is respectively connected with the input ends of the sampling and holding module and the demagnetization time detection module through resistance voltage division, and the auxiliary winding Naux of the flyback transformer is sent to a VDD end through a diode to be connected with the starting control module and the low-voltage locking module; one end of the starting circuit is also sent to a VDD end to be connected with the starting control and low-voltage locking module, and the other end of the starting circuit is connected with the drain end of the power switch tube M1; the source end of the power switch tube M1 is connected with the input end of peak current detection through the CS end; the output end of the peak current detection is connected with the input end of the PFM logic control; the output end of the rectification filter module is connected with a voltage output Vout end; the output end of the sampling and holding module is connected with the input end of the PFM logic control module through the error amplifier and the CV control module in sequence; the output end of the demagnetization time detection module is also connected to the input end of the PFM logic control module through the CC control module, and the output end of the PFM logic control module controls the on-off of the power switch tube M1 and the power switch tube Q1 through the driving module, so that the on-off of a primary circuit of the flyback transformer is controlled.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the AC-DC device of the invention saves an external starting circuit, thereby greatly reducing the power consumption of a starting part; the invention adopts the close-sealing triode to realize starting, has low standby power consumption and high speed, adopts the close-sealing technology, does not need a high-pressure process, is easy to realize and saves the cost; when the output is short-circuited, the system automatically enters a fixed frequency mode, so that the stability is improved.
Drawings
FIG. 1 is a circuit diagram of a charge control circuit of the present invention;
fig. 2 is a circuit diagram of an AC/DC converter of the present invention.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
a PFC AC/DC converter control circuit integrated with a power decoupling circuit comprises the decoupling circuit and an AC/DC converter; the decoupling circuit comprises a power supply, a resonant decoupling circuit transmitting part, a resonant decoupling circuit receiving part and a load; the decoupling circuit comprises a power supply, a resonant decoupling circuit transmitting part, a resonant decoupling circuit receiving part and a load; the power supply comprises a charging control circuit and a rechargeable battery; as shown in fig. 1, the charging control circuit includes a signal control terminal, a charging power supply terminal, a device power supply terminal, a battery terminal, a triode, a first MOS transistor and a second MOS transistor;
the charging power supply end is grounded through a first resistor and a second resistor which are connected in series; the base electrode of the triode is respectively connected with the signal control end and the charging power supply end, the collector electrode of the triode is connected with the grid electrode of the second MOS tube through a fourth resistor and is also connected with the source electrode of the first MOS tube through a third resistor, and the emitting electrode of the triode is grounded; the source electrode of the second MOS tube is connected with the charging power supply end through a first diode, and the drain electrode of the second MOS tube is connected with the equipment power supply end; the source electrode of the first MOS tube is connected with the charging power supply end through a first diode, the grid electrode of the first MOS tube is connected with the connection point of the first resistor and the second resistor, and the drain electrode of the first MOS tube is connected with the battery end;
the power supply is connected with the transmitting part of the resonance decoupling circuit, and the receiving part of the resonance decoupling circuit is connected with the load; the transmitting part of the resonance decoupling circuit comprises a transmitting end wireless communication module, a transmitting end DSP control system, a DDS signal source, a broadband linear power amplifier, an electromagnetic transmitting part and an electromagnetic transmitting end relay array; the DDS signal source is connected with a broadband linear power amplifier, the broadband linear power amplifier is connected with an electromagnetic emission part, the DDS signal source is connected with a transmitting end DSP control system, the transmitting end DSP control system is connected with an electromagnetic transmitting end relay array, a transmitting end wireless communication module is connected with the transmitting end DSP control system, and the transmitting end wireless communication module is connected with the electromagnetic emission part; the resonance decoupling circuit receiving part comprises an electromagnetic receiving part, a rectifying and filtering circuit, a DC/DC voltage-changing circuit, an electromagnetic receiving end relay array, a receiving end DSP control system and a receiving end wireless communication module; the electromagnetic receiving part is connected with the rectifying and filtering circuit, the rectifying and filtering circuit is connected with the DC/DC voltage converting circuit, the DC/DC voltage converting circuit is connected with a load, the electromagnetic receiving part is connected with an electromagnetic receiving end relay array, the electromagnetic receiving end relay array is connected with a receiving end DSP control system, and the receiving end DSP control system is connected with a receiving end wireless communication module; the electromagnetic transmitting end relay array comprises a switch and a capacitor which are connected in series, and then a plurality of groups of the electromagnetic transmitting end relay array are connected in parallel in such a way; then the relay switch array is connected with the electromagnetic emission part in parallel; the DSP control system at the transmitting terminal controls the relay switch array thereof to carry out selective on-off operation; the electromagnetic receiving end relay array comprises a switch and a capacitor which are connected in series, and then a plurality of groups of the electromagnetic receiving end relay array are connected in parallel in the mode; then the relay switch array is connected with the electromagnetic receiving part and the load in parallel; and the DSP control system at the receiving end controls the relay switch array to carry out selective on-off operation.
As shown in fig. 2, the AC/DC converter includes a flyback transformer, a rectifier and filter module, a start circuit, a start control and low voltage locking module, a peak current detection module, a sample and hold module, an error amplifier, a CV control module, a demagnetization time detection module, a CC control module, a PFM logic control module, a driving module, and a power switch M1; the starting circuit comprises a power switch tube Q1, the upper end of a primary winding Np of the flyback transformer is connected with an external input voltage Vin end, and the lower end of the primary winding Np is connected with the starting circuit; the secondary winding Ns of the flyback transformer is connected with an external rectification filter module; the auxiliary winding Naux of the transformer is respectively connected with the input ends of the sampling and holding module and the demagnetization time detection module through resistance voltage division, and the auxiliary winding Naux of the flyback transformer is sent to a VDD end through a diode to be connected with the starting control module and the low-voltage locking module; one end of the starting circuit is also sent to a VDD end to be connected with the starting control and low-voltage locking module, and the other end of the starting circuit is connected with the drain end of the power switch tube M1; the source end of the power switch tube M1 is connected with the input end of peak current detection through the CS end; the output end of the peak current detection is connected with the input end of the PFM logic control; the output end of the rectification filter module is connected with a voltage output Vout end; the output end of the sampling and holding module is connected with the input end of the PFM logic control module through the error amplifier and the CV control module in sequence; the output end of the demagnetization time detection module is also connected to the input end of the PFM logic control module through the CC control module, and the output end of the PFM logic control module controls the on-off of the power switch tube M1 and the power switch tube Q1 through the driving module, so that the on-off of a primary circuit of the flyback transformer is controlled.
The flyback transformer is used for realizing energy transmission and electric appliance isolation; the rectification filtering module is used for filtering output voltage; the starting control and low-voltage locking module is used for limiting the voltage of the power supply end inside the chip to prevent misoperation; the sampling and holding module is used for sampling the feedback voltage and comparing the feedback voltage with the reference voltage; the error amplifier is used for realizing the error amplification of the sampling voltage and the reference voltage; PFM logic control is used for realizing the control of voltage to frequency; the peak voltage detection is used for primary side current feedback; the driving module is used for driving the Q1 and the M1 to realize primary side on-off.
The invention aims to solve the problems of high standby power consumption and low starting speed of a system caused by the power consumption of peripheral components in a traditional primary side feedback switching power supply system. Therefore, the primary side feedback switching power supply circuit with ultra-low standby power consumption is provided, and is different from the existing switching power supply in that: an external starting circuit is omitted, and the system is started by closing and sealing the triode.
Based on a flyback primary side feedback switch power supply topological structure, a flyback transformer (comprising a primary side winding Np, a secondary side winding Ns and an auxiliary winding Naux), a rectifying filter circuit and resistors R1 and R2 are arranged outside the topological structure; the control part comprises a starting control and low-voltage locking module, a sampling and holding module, an error amplifier, a CV control module, demagnetization time detection, a CC control module, PFM logic control, peak current detection, a base electrode driving module, grid electrode driving, a power switch tube M1 and a closing and sealing triode Q1. The starting mode of the power supply end of the chip is improved, the power switch tube is integrated, and the sealing technology is adopted.
The working principle is as follows:
the external input voltage Vin is connected with a combined-sealed triode Q1 and a resistor R through a primary winding Np of the flyback transformerBCResistance RBCProviding current to the base of transistor Q1, Q1 turning on, via diode D2A capacitor C at VDD end of the control chip1And charging, when the VDD voltage rises to the internal set voltage VH, the UVLO signal is inverted, the system is started, the chip starts to work, and the VDD voltage is supplied by the auxiliary winding Naux.
R in the circuitBCIs a large resistor, typically 10M omega, that supplies current to the gate of the combined triode. High resistance RBCThe power consumption consumed during the system operation is very small, and in the primary side conduction stage RBCThe voltage at two ends is zero, no power consumption is consumed, and meanwhile, the charging current of the capacitor C1 is the grid current of Q1 and is a resistor RBCBeta times the current (beta is about 30), the start-up time is greatly shortened.
After the chip starts to work, firstlyThe grid drive and the base drive make M1, Q1 conductive, the primary side is conductive, the voltage of the secondary winding is opposite according to the transformer principle, and the output diode DOThe anode is at low level, and when the anode is cut off, the secondary side is not conducted. When the primary side is conducted, the input voltage passes through the primary winding Q1, M1, RCSWhen connected to ground, the primary inductor charges and the primary current rises gradually, and the current passes through RCSThe current detection (CS) end feeds back the current detection (CS) end into the chip in a voltage mode, when the CS end voltage reaches the internal setting, the output of the peak current detection comparator is inverted, the driving module is controlled by the logic circuit to turn off M1 and Q1, and the primary side is turned off. According to the inductance principle, the inductance current can not change suddenly, the secondary side voltage is reversed, and the output diode DOAnd conducting the secondary side. The voltage of the secondary winding Ns, namely the output voltage, is reflected on the auxiliary winding Naux in the secondary conduction stage, namely the demagnetization stage, and is divided by the resistor R1，R2And obtaining the FB voltage, and comparing the FB voltage with the reference voltage through a series of circuits such as a sampling hold circuit and the like, thereby controlling the switching frequency of Q1 and M1 and further controlling the output voltage. The primary winding Np and the secondary winding Ns of the flyback transformer are not simultaneously turned on.
The operation of the chip is divided into three operation modes: fixed frequency mode, CC (constant current) mode, CV (constant voltage) mode. When the FB voltage VFB<At 0.5V, the device works in a fixed frequency mode (38 KHz), and at 0.5V<VFB<When 2V (Vref 1= 2V), the mode is switched to the CC operation mode. And when the chip starting stage is completed, switching to the CV working state, and when the load continues to increase, switching the system to the CC working mode again.
When the chip starts to work, the fixed frequency control signal drives the Q1 and the M1 to be conducted, the input voltage is loaded at two ends of the primary winding, and the primary side branch is conducted, which is called a conducting stage. The primary side current gradually rises, the voltage of a current detection end (CS) gradually rises, when the voltage rises to an internal reference voltage Vref2, the output of a peak current detection comparator turns over, Q1 and M1 are turned off, a secondary side winding is conducted, energy is released, and a demagnetization stage is started.
In the demagnetization stage, the output voltage is reflected on the primary auxiliary winding Naux in a certain proportion, is divided by resistors R1 and R2 and is sent to a voltage feedback end (FB). Then, the voltage at the demagnetization stage 3/4 (the voltage at this stage reflects the output voltage more accurately) is obtained by the sample-and-hold circuit, and is sent to the error amplifier together with the reference voltage. The step-up voltage is generated by an oscillator, and is modulated by PFM pulse frequency to generate a frequency control signal to control the driving circuit.

Claims (1)

1. A PFC AC/DC converter control circuit integrated with a power decoupling circuit is characterized in that: comprises a decoupling circuit and an AC/DC converter; the decoupling circuit comprises a power supply, a resonant decoupling circuit transmitting part, a resonant decoupling circuit receiving part and a load; the decoupling circuit comprises a power supply, a resonant decoupling circuit transmitting part, a resonant decoupling circuit receiving part and a load; the power supply comprises a charging control circuit and a rechargeable battery; the charging control circuit comprises a signal control end, a charging power end, an equipment power supply end, a battery end, a triode, a first MOS (metal oxide semiconductor) tube and a second MOS tube;
the charging power supply end is grounded through a first resistor and a second resistor which are connected in series; the base electrode of the triode is respectively connected with the signal control end and the charging power supply end, the collector electrode of the triode is connected with the grid electrode of the second MOS tube through a fourth resistor and is also connected with the source electrode of the first MOS tube through a third resistor, and the emitting electrode of the triode is grounded; the source electrode of the second MOS tube is connected with the charging power supply end through a first diode, and the drain electrode of the second MOS tube is connected with the equipment power supply end; the source electrode of the first MOS tube is connected with the charging power supply end through a first diode, the grid electrode of the first MOS tube is connected with the connection point of the first resistor and the second resistor, and the drain electrode of the first MOS tube is connected with the battery end;
the AC/DC converter comprises a flyback transformer, a rectifying and filtering module, a starting circuit, a starting control and low-voltage locking module, a peak current detection module, a sample holding module, an error amplifier, a CV control module, a demagnetization time detection module, a CC control module, a PFM logic control module, a driving module and a power switch tube M1; the starting circuit comprises a power switch tube Q1, the upper end of a primary winding Np of the flyback transformer is connected with an external input voltage Vin end, and the lower end of the primary winding Np is connected with the starting circuit; the secondary winding Ns of the flyback transformer is connected with an external rectification filter module; the auxiliary winding Naux of the transformer is respectively connected with the input ends of the sampling and holding module and the demagnetization time detection module through resistance voltage division, and the auxiliary winding Naux of the flyback transformer is sent to a VDD end through a diode to be connected with the starting control module and the low-voltage locking module; one end of the starting circuit is also sent to a VDD end to be connected with the starting control and low-voltage locking module, and the other end of the starting circuit is connected with the drain end of the power switch tube M1; the source end of the power switch tube M1 is connected with the input end of peak current detection through the CS end; the output end of the peak current detection is connected with the input end of the PFM logic control; the output end of the rectification filter module is connected with a voltage output Vout end; the output end of the sampling and holding module is connected with the input end of the PFM logic control module through the error amplifier and the CV control module in sequence; the output end of the demagnetization time detection module is also connected to the input end of the PFM logic control module through the CC control module, and the output end of the PFM logic control module controls the on-off of the power switch tube M1 and the power switch tube Q1 through the driving module, so that the on-off of a primary circuit of the flyback transformer is controlled.
CN201910953241.0A 2019-10-09 2019-10-09 PFC AC/DC converter control circuit of integrated power decoupling circuit Pending CN110707918A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112350564A (en) * 2020-07-24 2021-02-09 深圳市金威源科技股份有限公司 Three-phase standby zero reactive power consumption control circuit in switching power supply

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206498339U (en) * 2017-03-09 2017-09-15 南京邮电大学 A kind of primary side feedback AC DC converters of super-low standby power consumption
CN107947734A (en) * 2017-11-30 2018-04-20 苏州切思特电子有限公司 A kind of electric energy intelligent monitor system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206498339U (en) * 2017-03-09 2017-09-15 南京邮电大学 A kind of primary side feedback AC DC converters of super-low standby power consumption
CN107947734A (en) * 2017-11-30 2018-04-20 苏州切思特电子有限公司 A kind of electric energy intelligent monitor system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112350564A (en) * 2020-07-24 2021-02-09 深圳市金威源科技股份有限公司 Three-phase standby zero reactive power consumption control circuit in switching power supply

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Application publication date: 20200117

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