CN106550512A - A kind of resonant type soft-switch single stage type LED drive circuit - Google Patents

A kind of resonant type soft-switch single stage type LED drive circuit Download PDF

Info

Publication number
CN106550512A
CN106550512A CN201710025085.2A CN201710025085A CN106550512A CN 106550512 A CN106550512 A CN 106550512A CN 201710025085 A CN201710025085 A CN 201710025085A CN 106550512 A CN106550512 A CN 106550512A
Authority
CN
China
Prior art keywords
electric capacity
diode
switching tube
inductance
circuit
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.)
Granted
Application number
CN201710025085.2A
Other languages
Chinese (zh)
Other versions
CN106550512B (en
Inventor
章治国
刘俊良
郭强
李山
陈艳
刘述喜
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.)
Chongqing University of Technology
Original Assignee
Chongqing University of Technology
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 Chongqing University of Technology filed Critical Chongqing University of Technology
Priority to CN201710025085.2A priority Critical patent/CN106550512B/en
Publication of CN106550512A publication Critical patent/CN106550512A/en
Application granted granted Critical
Publication of CN106550512B publication Critical patent/CN106550512B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • 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
    • H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
    • 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4815—Resonant converters
    • 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
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a kind of resonant type soft-switch single stage type LED drive circuit, including AC input end, rectification circuit, pfc circuit, DC/DC circuits, LED load and control circuit, the pfc circuit includes inductance LB, diode D1, diode D2, electric capacity CBWith switching tube S1；The DC/DC circuits include inductance Lr, electric capacity Cr, electric capacity Cs, electric capacity Co, switching tube S2, transformator T, diode Do1With diode Do2, diode Do2Negative electrode simultaneously with electric capacity CoIt is connected with one end of LED load；The other end of the secondary windings of transformator T simultaneously with diode Do1Anode, electric capacity CoAnd one end isoelectric level of LED load is connected；The switching tube S1With switching tube S2Grid be simultaneously connected with the drive signal outfan of control circuit.Circuit structure of the present invention is simple, and can improve efficiency, improves power factor.

Description

A kind of resonant type soft-switch single stage type LED drive circuit
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of resonant type soft-switch single stage type LED drive circuit.
Background technology
LED is a kind of irradiative semiconductor device, belongs to a kind of brand-new illuminating source.It has energy-conserving and environment-protective, height Many advantages, such as light efficiency, long-life, various color, gradually replace traditional lighting light fixture, become the illuminations of a new generation.China Quality certification center（English abbreviation CQC）Research and develop and be proposed LED module alternating electron control device energy-conservation to recognize in 2014 Card business, it is CQC3146-2014 that its LED module alternating electron control device needs the standard of foundation《LED module alternating electron Control device energy-conservation authentication techniques specification》.The code requirement, when isolated LED drive power power is less than 5W, efficiency is needed More than 78.5%, reactive factor is required；When the power of LED drive power is between 5W and 25W, efficiency need to be more than 84%, power Factor need to be more than 0.8.With the power of LED drive power it is bigger, it is higher to its efficiency and power factor command.
In existing middle low power LED drive circuit frequently with two-stage type or single stage type.Two-stage type：Prime（PFC levels）It is real Existing PFC, rear class（DC/DC levels）Realize that pressure-stabilizing constant flow is exported, need two sets for the treatment of elements and corresponding control circuit, Its circuit is complicated, and high cost, efficiency are low.Then single stage type circuit becomes the focus of research：It will be PFC levels and DC/DC levels integrated Together, common switch pipe and control circuit, components and parts are few, low cost, efficiency and power density are obtained for lifting.But it is big absolutely Most single stage type LED drive circuits limit the lifting of circuit efficiency all in hard switching state.And due in side circuit There is leakage inductance in transformator, parasitic capacitance resonance of the meeting in circuit often can increase other absorbing circuits to suppress resonance again, This can sacrifice single stage type LED drive circuit performance.Thus, design and develop out a kind of high efficiency, High Power Factor, circuit structure letter Single ully-soft switchingr single stage type LED drive circuit is significant.
The content of the invention
For deficiencies of the prior art, it is an object of the invention to provide a kind of resonant type soft-switch single stage type LED drive circuit, circuit structure are simple, and can improve efficiency, improve power factor.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is such：A kind of resonant type soft-switch single-stage Formula LED drive circuit, including AC input end, rectification circuit, pfc circuit, DC/DC circuits, LED load and control circuit, its It is characterised by：
The rectification circuit, for AC input end alternating current is converted into unidirectional current；
The pfc circuit includes inductance LB, diode D1, diode D2, electric capacity CBWith switching tube S1, wherein：The inductance LB's One end is connected with an outfan of rectification circuit, inductance LBThe other end simultaneously with diode D1With diode D2Anode be connected； Diode D1Negative electrode and switching tube S1Source electrode be connected, diode D2Negative electrode and electric capacity CBOne end be connected；Electric capacity CBIt is another One end, switching tube S1Drain electrode and another outfan of rectification circuit be simultaneously grounded；
The DC/DC circuits include inductance Lr, electric capacity Cr, electric capacity Cs, electric capacity Co, switching tube S2, transformator T, diode Do1With two Pole pipe Do2, wherein：The electric capacity CrWith inductance LrOne end simultaneously with diode D2Negative electrode is connected, inductance LrThe other end with become One end of the armature winding of depressor T is connected, the other end and switching tube S of the armature winding of transformator T2Drain electrode simultaneously with switch Pipe S1Source electrode be connected；Electric capacity CrOther end end and switching tube S2Source electrode be connected；One end of the secondary windings of transformator T with Electric capacity CsOne end be connected, electric capacity CsThe other end simultaneously with diode Do1Negative electrode and diode Do2Anode be connected, two poles Pipe Do2Negative electrode simultaneously with electric capacity CoIt is connected with one end of LED load；The other end of the secondary windings of transformator T simultaneously with two poles Pipe Do1Anode, electric capacity CoAnd one end isoelectric level of LED load is connected；
The switching tube S1With switching tube S2Grid be simultaneously connected with the drive signal outfan of control circuit.
Further, the switching tube S of control circuit output1With switching tube S2Drive signal, be that complementary pulsewidth drives letter Number, for controlling switch pipe S respectively1With switching tube S2Turn-on and turn-off.
Further, the LED load is the LED row that some LEDs are connected to form.
Further, the inductance LrFor resonant inductance, the electric capacity CsFor resonant capacitance.
Compared with prior art, the invention has the advantages that：Simple structure, components and parts are less, efficiency high；In single stage type On LED drive circuit, resonant type soft-switch technology is combined, resonance is participated in using the magnetizing inductance of transformator, realize Sofe Switch, subtract Few tradition hard switching causes EMI to disturb, can high-frequency work, and higher power factor can be obtained simultaneously；Simultaneously can compared with Under high alternating voltage input, holding intermediate dc capacitance voltage is in the range of it can bear.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of the present invention.
Fig. 2 is inductance LBThe average current input waveform in half power frequency period.
Equivalent schematic diagrams of the Fig. 3 for DC/DC circuits.
Fig. 4 is the circuit simulation oscillogram of the present invention.
Specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment：Referring to Fig. 1, a kind of resonant type soft-switch single stage type LED drive circuit, including AC input end, rectification circuit, Pfc circuit, DC/DC circuits, LED load and control circuit.The LED load is the LED that some LEDs are connected to form Row.
The rectification circuit, for AC input end alternating current is converted into unidirectional current；When being embodied as, which includes DR1、 DR2、DR3And DR4, AC input end（Vac）One end simultaneously and DR1Anode and DR3Negative electrode be connected, the other end at AC input end While and DR2Anode and DR4Negative electrode be connected, DR1And DR2Anode be connected after as rectification circuit an outfan, DR3With DR4Negative electrode be connected after as rectification circuit another outfan.
The pfc circuit includes inductance LB, diode D1, diode D2, electric capacity CBWith switching tube S1.Wherein：The inductance LBOne end be connected with an outfan of rectification circuit, inductance LBThe other end simultaneously with diode D1With diode D2Anode It is connected.Diode D1Negative electrode and switching tube S1Source electrode be connected, diode D2Negative electrode and electric capacity CBOne end be connected.Electric capacity CB The other end, switching tube S1Drain electrode and another outfan of rectification circuit be simultaneously grounded；Power factor school is realized with this Orthofunction.
The DC/DC circuits include inductance Lr, electric capacity Cr, electric capacity Cs, electric capacity Co, switching tube S2, transformator T, diode Do1 With diode Do2.Wherein：The electric capacity CrWith inductance LrOne end simultaneously with diode D2Negative electrode is connected, inductance LrThe other end It is connected with one end of the armature winding of transformator T, the other end and switching tube S of the armature winding of transformator T2Drain electrode simultaneously with Switching tube S1Source electrode be connected；In actual implementation process, the inductance LrFor resonant inductance, the electric capacity CsFor resonant capacitance；Should Inductance LrCan be replaced by the leakage inductance existing for transformator T according to the working condition of circuit.Electric capacity CrOther end end and switching tube S2Source electrode be connected；One end of the secondary windings of transformator T and electric capacity CsOne end be connected, electric capacity CsThe other end simultaneously with two Pole pipe Do1Negative electrode and diode Do2Anode be connected, diode Do2Negative electrode simultaneously with electric capacity CoWith one end phase of LED load Even；The other end of the secondary windings of transformator T simultaneously with diode Do1Anode, electric capacity CoAnd one end isoelectric level of LED load It is connected（It is normally grounded）；The regulation to output voltage, electric current is realized with this.
The switching tube S1With switching tube S2Grid be simultaneously connected with the drive signal outfan of control circuit；Wherein, control The switching tube S of circuit output processed1With switching tube S2Drive signal, be complementary pulsewidth drive signal, for controlling switch respectively Pipe S1With switching tube S2Turn-on and turn-off.
By inductance LB, diode D1, diode D2, electric capacity CBWith switching tube S1The pfc circuit of composition, by determining inductance LB Value and control circuit to switching tube S1The dutycycle of the drive signal of grid input can make the Boost topology works of PFC units Make in DCM patterns, Boost topologys can be automatically obtained PFC functions in this mode.As shown in Fig. 2 the conducting of on representation switch pipe, Off representation switch pipe disconnects；ILB, avg are inductance LBIn half power frequency period average current input waveform, Q1For switching tube S1 Gate drive waveform.
As shown in figure 3, in DC/DC circuits, can be electric capacity CBRegard direct voltage source V asg, as open pipe S2It is off State, switching tube S1During beginning to turn on（t0~t1）, switching tube S1Parasitic capacitance（Coss）With inductance LrWith the excitation of transformator T Inductance LmStart resonance, as switching tube S1Parasitic capacitor voltage（Vcoos）Drop to zero from currency, at this moment（t1）Conducting Switching tube S1ZVS can be realized（ZVT）.
In switching tube S1Begin to turn on and diode Do1During shut-off（t1~t2）, DC voltage VgIt is added in static exciter electricity Sense LmWith inductance LrOn, while transformer secondary side only has diode Do1Start forward bias, now static exciter inductance Lm、 Inductance LrWith electric capacity CsStart resonance, as electric capacity CsWhen voltage is increased to maximum, by diode Do1Electric current be zero, then, Diode Do1Realize ZCS（Zero Current Switch）.
In switching tube S1Shut-off, switching tube S2Period before conducting（t3~t4）, flow through electric current switch tube S of inductance Lr1Post Raw electric capacity CossCharge, when voltage is increased to DC voltage VgWith electric capacity CrVoltage and when, at this moment（t4）Conducting switching tube S2, ZVS can be realized（ZVT）.
In switching tube S2Begin to turn on and diode Do2During disconnection（t4~t5）, it can be understood as electric capacity CrOn voltage Vr It is added in static exciter inductance LmWith inductance LrOn, while transformer secondary side only has diode Do2Start forward bias, now Static exciter inductance LmWith inductance LrWith electric capacity CsStart resonance, as electric capacity CsWhen voltage drops to minima, by diode Do1Electric current be zero, then, diode Do2Realize ZCS（Zero Current Switch）.
As shown in figure 4, VcossAnd VS2Respectively switching tube S1With switching tube S2Drain-source between voltage waveform, Q1And Q2Respectively For switching tube S1With switching tube S2Gate drive waveform, IDo1And IDo2Respectively diode Do1With diode Do2Current wave Shape.
Finally it should be noted that above example is only to illustrate technical scheme rather than restriction technologies side Case, it will be understood by those within the art that, those are modified to technical scheme or equivalent, and Without departing from the objective and scope of the technical program, all should cover in the middle of scope of the presently claimed invention.

Claims (4)

1. a kind of resonant type soft-switch single stage type LED drive circuit, including AC input end, rectification circuit, pfc circuit, DC/DC are electric Road, LED load and control circuit, it is characterised in that：
The rectification circuit, for AC input end alternating current is converted into unidirectional current；
The pfc circuit includes inductance LB, diode D1, diode D2, electric capacity CBWith switching tube S1, wherein：The inductance LB's One end is connected with an outfan of rectification circuit, inductance LBThe other end simultaneously with diode D1With diode D2Anode be connected； Diode D1Negative electrode and switching tube S1Source electrode be connected, diode D2Negative electrode and electric capacity CBOne end be connected；Electric capacity CBIt is another One end, switching tube S1Drain electrode and another outfan of rectification circuit be simultaneously grounded；
The DC/DC circuits include inductance Lr, electric capacity Cr, electric capacity Cs, electric capacity Co, switching tube S2, transformator T, diode Do1With two Pole pipe Do2, wherein：The electric capacity CrWith inductance LrOne end simultaneously with diode D2Negative electrode is connected, inductance LrThe other end with become One end of the armature winding of depressor T is connected, the other end and switching tube S of the armature winding of transformator T2Drain electrode simultaneously with switch Pipe S1Source electrode be connected；Electric capacity CrOther end end and switching tube S2Source electrode be connected；One end of the secondary windings of transformator T with Electric capacity CsOne end be connected, electric capacity CsThe other end simultaneously with diode Do1Negative electrode and diode Do2Anode be connected, two poles Pipe Do2Negative electrode simultaneously with electric capacity CoIt is connected with one end of LED load；The other end of the secondary windings of transformator T simultaneously with two poles Pipe Do1Anode, electric capacity CoAnd one end isoelectric level of LED load is connected；
The switching tube S1With switching tube S2Grid be simultaneously connected with the drive signal outfan of control circuit.
2. a kind of resonant type soft-switch single stage type LED drive circuit according to claim 1, it is characterised in that：Control circuit The switching tube S of output1With switching tube S2Drive signal, be complementary pulsewidth drive signal, for controlling switch pipe S respectively1With Switching tube S2Turn-on and turn-off.
3. a kind of resonant type soft-switch single stage type LED drive circuit according to claim 1, it is characterised in that：The LED bears Carry and arrange for the LED that some LEDs are connected to form.
4. a kind of resonant type soft-switch single stage type LED drive circuit according to claim 1, it is characterised in that：The inductance Lr For resonant inductance, the electric capacity CsFor resonant capacitance.
CN201710025085.2A 2017-01-13 2017-01-13 A kind of resonant type soft-switch single stage type LED drive circuit Expired - Fee Related CN106550512B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710025085.2A CN106550512B (en) 2017-01-13 2017-01-13 A kind of resonant type soft-switch single stage type LED drive circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710025085.2A CN106550512B (en) 2017-01-13 2017-01-13 A kind of resonant type soft-switch single stage type LED drive circuit

Publications (2)

Publication Number Publication Date
CN106550512A true CN106550512A (en) 2017-03-29
CN106550512B CN106550512B (en) 2018-06-26

Family

ID=58398319

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710025085.2A Expired - Fee Related CN106550512B (en) 2017-01-13 2017-01-13 A kind of resonant type soft-switch single stage type LED drive circuit

Country Status (1)

Country Link
CN (1) CN106550512B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106851925A (en) * 2017-04-01 2017-06-13 哈尔滨工业大学 High efficiency single-stage LED drive device based on Flyback and Class E
CN107659158A (en) * 2017-10-30 2018-02-02 重庆理工大学 A kind of isolated form high-gain DC converter of multi-resonant NE
CN108684104A (en) * 2018-05-23 2018-10-19 哈尔滨工业大学 Based on the automotive LED headlamp driver for improving SEPIC Sofe Switch
CN110492737A (en) * 2019-07-26 2019-11-22 江苏大学 A kind of single-stage isolated type no electrolytic capacitor LED drive power and switching method
CN111614243A (en) * 2019-02-25 2020-09-01 宏碁股份有限公司 Power supply conversion device
CN111740622A (en) * 2020-07-07 2020-10-02 奇普电源(常州)有限公司 LLC circuit of single-stage PFC
US11211873B2 (en) 2019-01-31 2021-12-28 Acer Incorporated Power conversion device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101505107A (en) * 2009-01-20 2009-08-12 华南理工大学 Low voltage stress single-stage AC-DC converter based on LLC series resonance
CN102891608A (en) * 2011-07-21 2013-01-23 山特电子（深圳）有限公司 High-efficiency and low-cost forward-flyback DC-DC (direct current-direct current) converter topology
US20140092643A1 (en) * 2012-09-28 2014-04-03 Osram Gmbh Electronic converter, and related lighting system and method of operating an electronic converter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101505107A (en) * 2009-01-20 2009-08-12 华南理工大学 Low voltage stress single-stage AC-DC converter based on LLC series resonance
CN102891608A (en) * 2011-07-21 2013-01-23 山特电子（深圳）有限公司 High-efficiency and low-cost forward-flyback DC-DC (direct current-direct current) converter topology
US20140092643A1 (en) * 2012-09-28 2014-04-03 Osram Gmbh Electronic converter, and related lighting system and method of operating an electronic converter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
闫朝阳等: "一种双电感结构的LLC谐振型PFC AC-DC变换器", 《电源学报》 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106851925A (en) * 2017-04-01 2017-06-13 哈尔滨工业大学 High efficiency single-stage LED drive device based on Flyback and Class E
CN106851925B (en) * 2017-04-01 2018-11-02 哈尔滨工业大学 High efficiency single-stage LED drive device based on Flyback and Class-E
CN107659158A (en) * 2017-10-30 2018-02-02 重庆理工大学 A kind of isolated form high-gain DC converter of multi-resonant NE
CN108684104A (en) * 2018-05-23 2018-10-19 哈尔滨工业大学 Based on the automotive LED headlamp driver for improving SEPIC Sofe Switch
US11211873B2 (en) 2019-01-31 2021-12-28 Acer Incorporated Power conversion device
CN111614243A (en) * 2019-02-25 2020-09-01 宏碁股份有限公司 Power supply conversion device
CN111614243B (en) * 2019-02-25 2021-10-22 宏碁股份有限公司 Power supply conversion device
CN110492737A (en) * 2019-07-26 2019-11-22 江苏大学 A kind of single-stage isolated type no electrolytic capacitor LED drive power and switching method
CN110492737B (en) * 2019-07-26 2021-05-25 江苏大学 Single-stage isolation type electrolytic capacitor-free LED driving power supply and switching method
CN111740622A (en) * 2020-07-07 2020-10-02 奇普电源(常州)有限公司 LLC circuit of single-stage PFC
CN111740622B (en) * 2020-07-07 2020-11-13 奇普电源(常州)有限公司 LLC circuit of single-stage PFC

Also Published As

Publication number Publication date
CN106550512B (en) 2018-06-26

Similar Documents

Publication Publication Date Title
CN106550512B (en) A kind of resonant type soft-switch single stage type LED drive circuit
CN106059313A (en) Active clamp flyback circuit and control method thereof
Wang et al. Single-stage bridgeless LED driver based on a CLCL resonant converter
CN106787757B (en) A kind of CLTCL resonance DC converter
CN205883057U (en) Ware drive power supply is used to microwave based on LCC resonance network
CN102238791B (en) Electronic ballast circuit for energy-saving lamps
CN206250979U (en) A kind of quasi-resonance active-clamp flyback converter
CN107041036B (en) A kind of single-stage LED drive circuit of integrated bridgeless Boost and LLC circuit
CN103841725A (en) Bleeding control module and silicon-controlled dimming LED drive circuit and system
CN106100344A (en) A kind of LLC resonant converter with liter high voltage gain
CN102386756A (en) Power frequency switching power supply
CN109661072A (en) LLC resonant converter, LED drive circuit and its control method
CN109451628A (en) Single-stage isolated type LED drive power based on GaN device
CN104617794A (en) Switch power supply and rectifying circuit
CN106230264A (en) A kind of high-efficient single direction LLC resonance DC DC translation circuit topological structure
CN104780692B (en) A kind of single-stage is without the double Boost of bridge and Flyback integrated LED drive circuit
CN106535402B (en) A kind of LED drive circuit that single-stage single-switch buck leakage inductance energy utilizes
CN104779807B (en) A kind of LLC resonant converter applied in distributed power source
CN106329903A (en) Buffer circuit used for Buck converter
CN201312262Y (en) High-frequency switch power supply with higher conversion efficiency
CN206302616U (en) A kind of single-stage buck formula LED drive circuit of nondestructive buffering
CN209593841U (en) Single-stage isolated type LED drive power based on GaN device
CN106787756A (en) A kind of CL FT CL resonance DC converters
CN206650872U (en) Intelligent dimming power circuit
CN110224605A (en) A kind of full-bridge circuit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180626

Termination date: 20190113

CF01 Termination of patent right due to non-payment of annual fee