WO2015196672A1 - Circuit de source d'alimentation auxiliaire à circuit de correction de facteur de puissance (pfc), et procédé et dispositif de commande pour celui-ci - Google Patents

Circuit de source d'alimentation auxiliaire à circuit de correction de facteur de puissance (pfc), et procédé et dispositif de commande pour celui-ci Download PDF

Info

Publication number
WO2015196672A1
WO2015196672A1 PCT/CN2014/089410 CN2014089410W WO2015196672A1 WO 2015196672 A1 WO2015196672 A1 WO 2015196672A1 CN 2014089410 W CN2014089410 W CN 2014089410W WO 2015196672 A1 WO2015196672 A1 WO 2015196672A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
pfc
alternating current
pulse signal
diode
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.)
Ceased
Application number
PCT/CN2014/089410
Other languages
English (en)
Chinese (zh)
Inventor
余世伟
陈亮
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.)
Opple Lighting Co Ltd
Original Assignee
Opple Lighting 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 Opple Lighting Co Ltd filed Critical Opple Lighting Co Ltd
Publication of WO2015196672A1 publication Critical patent/WO2015196672A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present invention relates to the field of PFC (power factor correction) technology, and more particularly to a PFC circuit with an auxiliary power supply circuit, a control method thereof and a control device.
  • PFC power factor correction
  • Figure 1 shows a conventional PFC circuit with an auxiliary power supply circuit.
  • the PFC circuit has its own auxiliary power supply circuit including: rectifier bridges DB1-DB4, receiving AC input voltage, and rectifying the AC input voltage into DC input voltage; input capacitor CBB2, connected in parallel between rectifier bridges DB1-DB4 The filter output signal of the rectifier bridge is filtered; the PFC switching power supply including the inductor L2, the switch transistor Q1 and the diode D1 is connected in parallel with the input capacitor CBB2 for generating the DC output required for the load.
  • ⁇ 2 is a conventional PFC circuit including a PFC control circuit with an auxiliary power supply circuit.
  • the PFC control circuit controls the operation of the PFC switching power supply by outputting a drive signal.
  • the two PFC inductive windings shown in Figures 1 and 2 can be used to power the control line as an auxiliary power source. They have a characteristic that they can hardly supply energy when the PFC is very light or empty, so that the entire power supply Very light load or standby mode does not provide a stable auxiliary power supply.
  • Figures 3 and 4 show the current flow on the inductor L2 in the existing PFC circuit with the auxiliary power supply circuit when the PFC is lightly loaded.
  • the PFC control circuit within a power frequency cycle may only issue a small number of drive pulses (ie, the drive pulse is intermittent, for example, only 10ms within a power frequency cycle of 50ms, the PFC control circuit is transmitting
  • the driving pulse which is often the lighter the load, the shorter the working time ratio, drives the switching tube Q1.
  • the main winding and the auxiliary winding of the inductor L2 are coupled and have current flow Both the primary winding and the auxiliary winding induce a corresponding proportional voltage.
  • the pulse is issued when the instantaneous value of the AC input voltage is low, the voltage difference between the two sides of the inductor L2 is relatively large when the pulse is turned off, that is, the voltage drop is high, because the voltage at the end of the main winding 2 of the inductor L2 is also the input.
  • the voltage is low, and the voltage at the 3 terminal is the output voltage is basically constant, so the voltage drop is relatively large, the voltage drop of the main winding of the inductor L2 is large, the auxiliary winding of the inductor L2 also induces a relatively large voltage, and the current flow on the auxiliary winding of the inductor L2 As shown in Figure 4.
  • the present application is a novel PFC circuit-based auxiliary power supply circuit, which adopts a PFC control circuit that is turned on when the AC input voltage is low at a light load, that is, the PFC control circuit works normally when the absolute value of the instantaneous value of the AC voltage is low, so that The PFC control circuit operates near the AC voltage across zero, enabling stable output at light loads.
  • the present application discloses a PFC circuit with an auxiliary power supply circuit, comprising: a PFC circuit, receiving an AC input voltage from an AC power source, and generating a DC output voltage required for the load and an auxiliary power voltage output; a PFC load size judging circuit, receiving The output current from the PFC circuit, and judge whether the load of the PFC circuit is high or low according to the output current.
  • the shield signal is output to the alternating current instantaneous voltage detecting circuit; the alternating current instantaneous voltage detecting circuit receives the AC power source.
  • the AC input voltage detects the instantaneous value of the AC input voltage, generates a pulse signal synchronized with the AC input voltage, and outputs the pulse signal to the PFC control circuit.
  • the PFC control circuit controls the PFC circuit according to the normal working mode when the enable terminal receives the high-level pulse signal, and is in the non-working state when the enable terminal receives the low-level pulse signal.
  • the present application also discloses a control device for a PFC circuit with an auxiliary power supply circuit, the PFC circuit operating according to the control of the PFC control circuit, the control device comprising: a PFC load size determination circuit, receiving an output current from the PFC circuit, and Judging whether the load of the PFC circuit is high or low according to the output current, when determining that the load of the PFC circuit is high, outputting a shielding signal to the alternating current instantaneous voltage detecting circuit; the alternating current instantaneous voltage detecting circuit receiving the alternating current input voltage from the alternating current power source, and the alternating current input The instantaneous value of the voltage is detected, a pulse signal synchronized with the AC input voltage is generated, and the pulse signal is output to the enable end of the PFC control circuit.
  • the present application also discloses a PFC circuit self-contained auxiliary power supply circuit control method, the PFC circuit operates according to the control of the PFC control circuit, the control method includes: detecting whether the load of the PFC circuit is high or low; when detecting the PFC circuit When the load is low, the AC input voltage is detected; a pulse signal synchronized with the AC input voltage is generated and output to the PFC control circuit; and the pulse signal controls the PFC control circuit to be in an active state or a non-operation state.
  • Figure 1 shows a conventional PFC circuit with an auxiliary power supply circuit.
  • ⁇ 2 is a conventional PFC circuit including a PFC control circuit with an auxiliary power supply circuit.
  • Figures 3 and 4 show the current flow on the inductor L2 in the existing PFC circuit with the auxiliary power supply circuit when the PFC is lightly loaded.
  • FIG. 5 shows a block diagram of a PFC circuit with an auxiliary power supply circuit in accordance with an embodiment of the present invention.
  • FIG. 6 shows a detailed circuit diagram of an alternating current instantaneous voltage detecting circuit according to an embodiment of the present invention.
  • FIG. 7A and 7B are diagrams showing the manner in which a PFC control circuit is controlled by a pulse signal output from an alternating current instantaneous voltage detecting circuit in accordance with an embodiment of the present invention.
  • FIG. 8 is a flow chart showing a control method of a PFC circuit with an auxiliary power supply circuit according to an embodiment of the present invention.
  • first, second, third, etc. may be used herein to describe various elements, components and/or portions, these elements, components and/or portions are not limited by these terms. These terms are only used to distinguish one element, component or part. Thus, a first element, component or portion discussed below may be referred to as a second element, component or portion without departing from the teachings of the invention.
  • the main technical feature of the present invention is that, when the PFC circuit is under no-load or very light load, the intermittent driving pulses from the PFC control circuit are all sent out when the input AC power is low, and the PFC is controlled.
  • the control circuit does not work when the input AC power is high, so that a large voltage difference between the two ends of the inductor can be ensured, thereby ensuring the auxiliary winding voltage output of the inductor as the auxiliary power source.
  • FIG. 5 shows a block diagram of a PFC circuit with an auxiliary power supply circuit in accordance with an embodiment of the present invention.
  • the PFC circuit has its own auxiliary power supply circuit including a PFC circuit 501, a PFC control circuit 503, and a control device.
  • the control device includes an alternating current instantaneous voltage detecting circuit 502 and a PFC load size determining circuit 504.
  • the PFC circuit 501 receives an AC input voltage from an AC power source and generates a DC output required for the load and an auxiliary power voltage output.
  • the PFC load size judging circuit 504 receives the DC output from the PFC circuit 501, and judges whether the load of the PFC circuit 501 is high or low based on the DC output. When the PFC load size judging circuit 504 judges that the PFC circuit 501 is high (full load), the AC instantaneous voltage detecting circuit 502 is shielded. At this time, the PFC circuit 501 and the conventional PFC external auxiliary power supply work in exactly the same state.
  • the PFC load size judging circuit 504 is for shielding the AC instantaneous voltage detecting circuit 502 when the PFC circuit 501 is heavily loaded, and does not output the mask signal to the AC instantaneous voltage detecting circuit 502 when the PFC circuit 501 is under a low load.
  • the PFC load size determination circuit 504 is shown in FIG. 5 to determine the level of the load of the PFC circuit 501 based on the DC output from the PFC circuit 501, those skilled in the art will appreciate that the PFC load size determination circuit 504 can also be based on other signals.
  • the level of the load of the PFC circuit 501 is judged.
  • a DC-DC converter is usually connected to the PFC circuit, and the PFC load size determining circuit 504 can also receive an enable signal or output power of the DC-DC converter, and determine the load of the PFC circuit 501 based thereon. High and low.
  • the AC instantaneous voltage detecting circuit 502 does not operate when receiving the mask signal from the PFC load size determining circuit 504 (the mask signal is, for example, a long high level).
  • the mask signal from the PFC load size judging circuit 504 is not received, that is, when the PFC circuit 501 is lightly loaded or idling, the AC instantaneous voltage detecting circuit 502 operates.
  • the AC instantaneous voltage detecting circuit 502 receives the AC input voltage from the AC power source, detects the instantaneous value of the AC input voltage, and obtains a pulse signal synchronized with the AC input voltage (for example, the instantaneous absolute value of the AC input voltage is lower than a predetermined threshold)
  • the pulse signal is at a high level, and when the instantaneous absolute value of the AC input voltage is higher than a predetermined threshold, the pulse signal is at a low level, and the pulse signal is output to the enable end of the PFC control circuit 503.
  • the enable terminal of the PFC control circuit 503 receives the pulse signal.
  • the PFC control circuit 503 is enabled to control the operation of the PFC circuit 502 in accordance with the normal operation mode, that is, the switching transistor Q1 is turned on or off according to the driving voltage from the PFC control circuit 503, and allows the input current.
  • the waveform tracks the voltage waveform while the auxiliary winding of the inductor L2 of the PFC circuit 502 induces a voltage as an auxiliary power supply output voltage.
  • the PFC control circuit 503 is disabled.
  • the AC instantaneous voltage detecting circuit 502 emit a high level signal only when the AC input signal is low to force the PFC control circuit 503 to be in operation, thereby ensuring that the PFC inductor auxiliary winding output voltage is high.
  • the PFC circuit 501 and the PFC control circuit 503 can employ the existing PFC circuit and its control circuit as described in FIGS. 1 and 2, and other suitable PFC circuits and their control circuits can also be used.
  • FIG. 6 shows a detailed circuit diagram of an alternating current transient voltage detecting circuit 502 in accordance with an embodiment of the present invention.
  • the alternating current instantaneous voltage detecting circuit 502 includes first and second diodes D8 and D9, a Zener diode ZD3, and a transistor Q4. Positive electrode of the first diode D8 and second diode The positive terminal of D9 serves as an input terminal of the alternating current instantaneous voltage detecting circuit 502, and receives an input from an alternating current power source.
  • the anode of the first diode D8 is coupled to the L terminal of the AC power source
  • the anode of the second diode D9 is coupled to the N terminal of the neutral line of the AC power source
  • the negative pole is coupled to the negative pole of the Zener diode ZD3, the anode of the Zener diode ZD3 is coupled to the base of the transistor Q4, the collector of the transistor Q4 is the output of the AC instantaneous voltage detecting circuit 502, and the emitter of the transistor Q4 is grounded.
  • the alternating current transient voltage detecting circuit 502 further includes first to fourth resistors R37, R38, R39, and R14.
  • the first to third resistors R37-R39 are connected between the connection point of the negative electrode of the first diode D8 and the negative electrode of the second diode D9 and the negative electrode of the Zener diode ZD3, and the collector of the transistor Q4 passes the fourth The resistor R14 is connected to the power supply Vcc.
  • the alternating current instantaneous voltage detecting circuit 502 detects an alternating current input voltage from the alternating current power source received at the input end thereof, and when the instantaneous absolute value of the input voltage is detected to be lower than a predetermined threshold, the alternating current instantaneous voltage detecting circuit 502 outputs a high level through the output end thereof.
  • the pulse signal is sent to the PFC control circuit 503 to enable the PFC control circuit 503 to operate normally.
  • the alternating current instantaneous voltage detecting circuit 502 When it is detected that the instantaneous absolute value of the input voltage is higher than a predetermined threshold, the alternating current instantaneous voltage detecting circuit 502 outputs a low level pulse signal through its output terminal, and the PFC control circuit 503 is prohibited from operating.
  • the alternating current instantaneous voltage detecting circuit 502 is not limited to the circuit shown in FIG. 6, and FIG. 6 is only one of the implementations of the alternating current instantaneous voltage detecting circuit 502. Any circuit capable of realizing the function of the alternating current instantaneous voltage detecting circuit 502 of the present invention is within the scope of the present invention.
  • FIGS. 7A and 7B are diagrams for controlling the PFC control circuit 503 by a pulse signal output from the alternating current instantaneous voltage detecting circuit 502 according to an embodiment of the present invention.
  • the PFC control circuit 503 shown in Figures 7A and 7B is an existing L6562 PFC controller.
  • the pulse signal output from the alternating current instantaneous voltage detecting circuit 502 can be directly output to the zero current detector in the PFC control circuit 503 to enable the L6562 PFC controller. Current zero crossing detection section.
  • the pulse signal output from the alternating current instantaneous voltage detecting circuit 502 can be directly output to the driver in the PFC control circuit 503 to directly enable the PFC pulse output portion. Applying the enable signal in both ways can force the PFC control circuit 503 to not operate when the AC input voltage is high, and to operate normally when the instantaneous absolute value of the AC input voltage is below a predetermined threshold.
  • the PFC control circuit 503 when the AC input voltage is high, the PFC control circuit 503 does not supply the driving voltage to the switching transistor Q1 inside the PFC circuit 501; and when the instantaneous absolute value of the AC input voltage is lower than the predetermined threshold, the PFC control circuit 503 goes to the PFC circuit.
  • the switching transistor Q1 inside the 501 provides a driving voltage.
  • the PFC control circuit 503 is not limited to the L6562 PFC controller shown in FIG. 7, and therefore, the manner of adding an enable signal to the PFC control circuit 503 is not limited to the mode shown in FIG. Any of the circuits capable of implementing the functions of the PFC control circuit 503 of the present invention and the various ways of applying an enable signal to the PFC control circuit 503 are within the scope of the present invention.
  • FIG. 8 is a flow chart showing a control method of a PFC circuit with an auxiliary power supply circuit according to an embodiment of the present invention.
  • step 801 it is detected whether the load of the PFC circuit is high or low.
  • the AC input voltage is detected when the load of the PFC circuit is low.
  • a pulse signal synchronized with the AC input voltage is generated and output to the PFC control circuit, wherein when the instantaneous absolute value of the AC input voltage is below a predetermined threshold, the pulse signal is at a high level; when the AC input voltage is The pulse signal is at a low level when the instantaneous absolute value is above a predetermined threshold.
  • the pulse signal controls the PFC control circuit to be in an active or inactive state, ie, when the PFC control circuit receives a high level pulse signal, it operates normally, and does not operate when a low level pulse signal is received.
  • the improved control device of the PFC circuit with the auxiliary power supply circuit has an AC input voltage instantaneous value detecting circuit, and the output signal of the AC voltage instantaneous value detecting circuit is Output to the PFC control circuit, and under light load, when the AC input voltage is low, the AC voltage instantaneous value detecting circuit outputs a high level pulse, and under heavy load, shields the AC voltage instantaneous value detecting circuit from the function .
  • the improved control method according to an embodiment of the present invention is suitable for using an auxiliary winding of a PFC circuit as an auxiliary power source, and requires that the auxiliary power source of the PFC circuit is also lightly loaded or under no load (the control circuit operates in a standby state).
  • the drive circuit of the luminaire has a control receiver module that receives the remote control signal when the luminaire is off (the main output is off).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

La présente invention porte sur un circuit de source d'alimentation auxiliaire à circuit de correction de facteur de puissance (PFC), comprenant : un circuit PFC (501) destiné à recevoir une tension d'entrée de courant alternatif provenant d'une source d'alimentation en courant alternatif et générer une tension de sortie en courant continu et une tension de sortie de source d'alimentation auxiliaire requise par une charge ; un circuit de détermination de dimension de charge PFC (504) destiné à recevoir le courant de sortie provenant du circuit PFC, déterminer si la charge du circuit PFC est élevée ou faible selon le courant de sortie, et délivrer en sortie un signal de blindage à un circuit de détection de tension instantanée de courant alternatif lorsqu'il est déterminé que la charge du circuit PFC est élevée ; le circuit de détection de tension instantanée de courant alternatif (502) destiné à recevoir la tension d'entrée de courant alternatif provenant de la source d'alimentation en courant alternatif, détecter une valeur instantanée de la tension d'entrée de courant alternatif, générer un signal d'impulsion synchronisé avec la tension d'entrée de courant alternatif, et délivrer en sortie le signal d'impulsion à une extrémité d'activation d'un circuit de commande PFC (503) ; et le circuit de commande PFC qui commande le circuit PFC pour fonctionner d'une manière de fonctionnement normal lorsque l'extrémité d'activation de celui-ci reçoit un signal d'impulsion de haut niveau, et est dans un état de non-fonctionnement lorsque l'extrémité d'activation de celui-ci reçoit un signal d'impulsion de bas niveau.
PCT/CN2014/089410 2014-06-26 2014-10-24 Circuit de source d'alimentation auxiliaire à circuit de correction de facteur de puissance (pfc), et procédé et dispositif de commande pour celui-ci Ceased WO2015196672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410298516.9 2014-06-26
CN201410298516.9A CN105450054B (zh) 2014-06-26 2014-06-26 功率因数校正电路自带辅助电源电路及其控制方法和装置

Publications (1)

Publication Number Publication Date
WO2015196672A1 true WO2015196672A1 (fr) 2015-12-30

Family

ID=54936619

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/089410 Ceased WO2015196672A1 (fr) 2014-06-26 2014-10-24 Circuit de source d'alimentation auxiliaire à circuit de correction de facteur de puissance (pfc), et procédé et dispositif de commande pour celui-ci

Country Status (2)

Country Link
CN (1) CN105450054B (fr)
WO (1) WO2015196672A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107134922A (zh) * 2017-07-05 2017-09-05 郑州万用电子科技有限公司 一种仪用电源的转换电路
CN110086328A (zh) * 2019-06-19 2019-08-02 深圳莱福德科技股份有限公司 上电时序控制电路
CN111564967A (zh) * 2020-04-29 2020-08-21 南京博德新能源技术有限公司 带辅助电源的改进Boost的PFC电路
CN115912584A (zh) * 2022-11-22 2023-04-04 湖南炬神电子有限公司 一种降低大功率充电器pfc损耗的电路

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107395013A (zh) * 2016-05-17 2017-11-24 亚荣源科技（深圳）有限公司 电源产生电路及其操作方法
CN106714382B (zh) * 2017-01-11 2018-05-04 福州华芯电子有限公司 基于全电压波峰检测的量化pfc
WO2020183972A1 (fr) * 2019-03-11 2020-09-17 富士電機株式会社 Circuit intégré et circuit d'alimentation électrique
CN113394964B (zh) * 2021-06-15 2023-06-09 矽力杰半导体技术(杭州)有限公司 控制电路及应用其的pfc电路

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11332220A (ja) * 1998-05-18 1999-11-30 Sony Corp 直流電源回路
CN101714829A (zh) * 2008-10-01 2010-05-26 弗莱克斯电子有限责任公司 功率因数校正电路
CN102130577A (zh) * 2010-12-31 2011-07-20 浙江大学 一种用于功率因数校正电路的窗口控制电路
CN102723880A (zh) * 2012-06-13 2012-10-10 广州金升阳科技有限公司 一种交流变直流电路
CN102801299A (zh) * 2012-07-18 2012-11-28 华为技术有限公司 功率因数校正器的控制方法以及不间断电源
EP2713489A1 (fr) * 2012-09-27 2014-04-02 Siemens Aktiengesellschaft Procédé de fonctionnement d'un convertisseur PFC actif pendant puissance faible utilisant modulation fenêtre avec commande en boucle ouverte de largeur

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101742188B (zh) * 2009-12-31 2013-06-12 深圳创维－Rgb电子有限公司 一种lcd-tv电源电压检测电路
CN204465369U (zh) * 2014-06-26 2015-07-08 欧普照明股份有限公司 功率因数校正电路自带辅助电源电路及其控制装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11332220A (ja) * 1998-05-18 1999-11-30 Sony Corp 直流電源回路
CN101714829A (zh) * 2008-10-01 2010-05-26 弗莱克斯电子有限责任公司 功率因数校正电路
CN102130577A (zh) * 2010-12-31 2011-07-20 浙江大学 一种用于功率因数校正电路的窗口控制电路
CN102723880A (zh) * 2012-06-13 2012-10-10 广州金升阳科技有限公司 一种交流变直流电路
CN102801299A (zh) * 2012-07-18 2012-11-28 华为技术有限公司 功率因数校正器的控制方法以及不间断电源
EP2713489A1 (fr) * 2012-09-27 2014-04-02 Siemens Aktiengesellschaft Procédé de fonctionnement d'un convertisseur PFC actif pendant puissance faible utilisant modulation fenêtre avec commande en boucle ouverte de largeur

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107134922A (zh) * 2017-07-05 2017-09-05 郑州万用电子科技有限公司 一种仪用电源的转换电路
CN107134922B (zh) * 2017-07-05 2023-10-31 郑州工业应用技术学院 一种仪用电源的转换电路
CN110086328A (zh) * 2019-06-19 2019-08-02 深圳莱福德科技股份有限公司 上电时序控制电路
CN110086328B (zh) * 2019-06-19 2024-05-07 深圳莱福德科技股份有限公司 上电时序控制电路
CN111564967A (zh) * 2020-04-29 2020-08-21 南京博德新能源技术有限公司 带辅助电源的改进Boost的PFC电路
CN115912584A (zh) * 2022-11-22 2023-04-04 湖南炬神电子有限公司 一种降低大功率充电器pfc损耗的电路
CN115912584B (zh) * 2022-11-22 2023-10-27 湖南炬神电子有限公司 一种降低大功率充电器pfc损耗的电路

Also Published As

Publication number Publication date
CN105450054A (zh) 2016-03-30
CN105450054B (zh) 2018-11-27

Similar Documents

Publication Publication Date Title
WO2015196672A1 (fr) Circuit de source d'alimentation auxiliaire à circuit de correction de facteur de puissance (pfc), et procédé et dispositif de commande pour celui-ci
US10700592B2 (en) Load detecting device
US9282608B2 (en) Dimming driving system and dimming controller
JP5526857B2 (ja) 電源制御用半導体集積回路および絶縁型直流電源装置
US11750010B2 (en) Detection circuit for an active discharge circuit of an X-capacitor, related active discharge circuit, integrated circuit and method
US9136767B2 (en) Switching power-supply device
KR101769130B1 (ko) 전력 공급 장치, 링크 전압 제어 스위치의 제어 장치 및 방법
JP5056395B2 (ja) スイッチング電源装置
JP5799537B2 (ja) スイッチング電源装置の制御回路及びスイッチング電源装置
US20080291709A1 (en) Switching power supply apparatus
EP2672620B1 (fr) Circuit d'amélioration de facteur de puissance
US8699241B2 (en) Switching mode power supply
JP6248430B2 (ja) Ｌｅｄ駆動装置及びｌｅｄ点灯装置並びに誤差増幅回路
US10148170B2 (en) Switching power converter with magnetizing current shaping
US9627983B2 (en) Circuit suppressing excessive current in startup phase of a voltage converter and method thereof
JP2016152738A (ja) 電源制御用半導体装置
JP2023058933A (ja) 電源回路
JP6187024B2 (ja) Ｌｅｄ電源装置及びｌｅｄ照明装置
US8467202B2 (en) Flyback power supply system
US20160087519A1 (en) Switching Power-Supply Device
EP2950620B1 (fr) Gradateur numérique universel
JP2001025251A (ja) 電源装置
JP2007037378A (ja) スイッチング電源の停電検出回路
US9386641B2 (en) Lighting dimmer synchronous load device
JP6613938B2 (ja) Ｌｅｄ用電源装置及びｌｅｄ照明装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14895717

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14895717

Country of ref document: EP

Kind code of ref document: A1