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CN105407583A - Single-pole quasi-resonance LED driving device based on Buck-Boost circuit and Flyback circuit - Google Patents

Single-pole quasi-resonance LED driving device based on Buck-Boost circuit and Flyback circuit Download PDF

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Publication number
CN105407583A
CN105407583A CN201511023290.2A CN201511023290A CN105407583A CN 105407583 A CN105407583 A CN 105407583A CN 201511023290 A CN201511023290 A CN 201511023290A CN 105407583 A CN105407583 A CN 105407583A
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diode
inductance
pole
electrochemical capacitor
connect
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CN105407583B (en
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王懿杰
张树
管乐诗
张相军
刘晓胜
徐殿国
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention provides a single-pole quasi-resonance LED driving device based on a Buck-Boost circuit and a Flyback circuit, belonging to the field of LED driving and solving the problems that a single-pole LED driver based on a Buck-Boost circuit and a Flyback circuit is low in system efficiency and large in loss because a switch tube works at the hard switching state. The driving device enters into the work state of quasi-resonance when the transformer secondary side current is zero, the leakage inductor of the transformer primary side and the parasitic capacitor of an MOSFET form a resonance circuit, and the main resonance pathway is the leakage inductor of the transformer primary side, a sixth diode, a second inductor, and the parasitic capacitor of the MOSFET. The driving device reduces the switching loss of the MOSFET and improves the system efficiency through the quasi-resonance switching mode. The single-pole quasi-resonance LED driving device is particularly suitable for the constant current driving of LEDs.

Description

A kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit
Technical field
The present invention relates to a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit, belong to field of LED drive.
Background technology
LED, because of long working life, environment friendly and pollution-free, luminous photochromic pure and operating efficiency advantages of higher, is widely used in multiple fields such as street lighting, room lighting and LCD back light.Along with the continuous maturation of LED technology, LED has presented the trend replacing conventional fluorescent.Follow the characteristic that LED constant current drives, the LED drive circuit of efficient stable, has been subject to the extensive concern of researcher.
Existing LED drive circuit can be divided into unipolar drive circuits and the two poles of the earth drive circuit, the front very PFC power factor correction module of the two poles of the earth drive circuit, after very DC-DC converter, because the two poles of the earth, front and back use respective power tube, therefore the volume of the two poles of the earth drive circuit is larger, system reliability is low, and cost is high.It is larger that existing unipolar drive circuits solves the two poles of the earth drive circuit volume, system reliability is low, the problem that cost is high, but still have deficiency: such as based on the one pole LED driver of Buck-Boost circuit and Flyback circuit, its switching tube is operated in hard switching state, be unfavorable for the raising of system effectiveness, loss is excessive.
Summary of the invention
The object of the invention is to solve the existing problem that system effectiveness is low and loss is large caused because switching tube is operated in hard switching state based on the one pole LED driver of Buck-Boost circuit and Flyback circuit, proposing a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit.
A kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit of the present invention, it comprises AC power AC, the first inductance L 1, the second inductance L 2, the first diode D 1, the second diode D 2, the 3rd diode D 3, the 4th diode D 4, the 5th diode D 5, the 6th diode D 6, the 7th diode D 7, the first electric capacity C 1, the first electrochemical capacitor C 2, the second electrochemical capacitor C 3, the 3rd electrochemical capacitor C 4, the first resistance R 1, the second resistance R 2, metal-oxide half field effect transistor Q 1, amplifier AMP, load feedback unit 1, driving control unit 2 and transformer M;
One end of AC power AC and the first inductance L 1one end connect, the first inductance L 1the other end simultaneously with the first electric capacity C 1one end, the first diode D 1positive pole and the 3rd diode D 3positive pole connect, the first diode D 1negative pole and the second diode D 2positive pole connect, the first diode D 1with the second diode D 2common port simultaneously with the 5th diode D 5positive pole and the second electrochemical capacitor C 3positive pole connect, the second diode D 2negative pole and the 4th diode D 4negative pole connect, the second diode D 2with the 4th diode D 4common port simultaneously with the first electric capacity C 1the other end be connected with the other end of AC power AC, the 5th diode D 5negative pole simultaneously with the 6th diode D 6negative pole and the second inductance L 2one end connect, the second inductance L 2the other end simultaneously with the first electrochemical capacitor C 2positive pole, metal-oxide half field effect transistor Q 1drain D and metal-oxide half field effect transistor Q 1parasitic capacitance C 5one end connect, the 6th diode D 6positive pole and the first electrochemical capacitor C 2negative pole all with the former limit inductance L of transformer M pdifferent name end connect, the secondary inductance L of transformer M sdifferent name end and the 7th diode D 7positive pole connect, the 7th diode D 7negative pole and the 3rd electrochemical capacitor C 4positive pole connect, the 7th diode D 7with the 3rd electrochemical capacitor C 4common port as the incoming end of the positive pole of LED, the secondary inductance L of transformer M ssame Name of Ends, the 3rd electrochemical capacitor C 4negative pole and the second resistance R 2one end all be digitally connected, the second resistance R 2the other end be connected with the in-phase input end of amplifier AMP, the second resistance R 2with the common port of the amplifier AMP incoming end as the negative pole of LED, the out-phase input access reference voltage V of amplifier AMP ref, the output of amplifier AMP is connected with the input of load feedback unit 1, and the output of load feedback unit 1 is connected with the input of driving control unit 2, driving control unit 2 output and metal-oxide half field effect transistor Q 1grid G connect, the first resistance R 1one end simultaneously with metal-oxide half field effect transistor Q 1source S and metal-oxide half field effect transistor Q 1parasitic capacitance C 5the other end connect, the 3rd diode D 3negative pole, the 4th diode D 4positive pole, the second electrochemical capacitor C 3negative pole, the first resistance R 1the other end and the former limit inductance L of transformer M psame Name of Ends all be in analog connected.
A kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit of the present invention, resonant tank is formed by the former limit leakage inductance of transformer M and the parasitic capacitance of metal-oxide half field effect transistor, achieve the switching mode of quasi-resonance, decrease the switching loss of metal-oxide half field effect transistor, at nominal load, under the condition of nominal input voltage 220V, average system efficiency is 87.72%, the highest system effectiveness can reach 90.91%, solve the existing problem that system effectiveness is low and loss is large caused because switching tube is operated in hard switching state based on the one pole LED driver of Buck-Boost circuit and Flyback circuit.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in execution mode one;
Fig. 2 is the discontinuous current oscillogram of Buck-Boost circuit in execution mode one;
Fig. 3 is the key operation waveforms figure of Flyback circuit in execution mode one;
Fig. 4 is the circuit theory diagrams of load feedback unit in execution mode five;
Fig. 5 is the controlling functions module map of NCP1207 chip in execution mode six;
Fig. 6 is the control signal oscillogram of NCP1207 chip in execution mode six;
Fig. 7 is the input voltage and input current oscillogram of power factor correction unit in execution mode seven;
Fig. 8 is the oscillogram of metal-oxide half field effect transistor quasi-resonant switching in execution mode eight.
Embodiment
Embodiment one: composition graphs 1, Fig. 2 and Fig. 3 illustrate present embodiment, a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in present embodiment, it comprises AC power AC, the first inductance L 1, the second inductance L 2, the first diode D 1, the second diode D 2, the 3rd diode D 3, the 4th diode D 4, the 5th diode D 5, the 6th diode D 6, the 7th diode D 7, the first electric capacity C 1, the first electrochemical capacitor C 2, the second electrochemical capacitor C 3, the 3rd electrochemical capacitor C 4, the first resistance R 1, the second resistance R 2, metal-oxide half field effect transistor Q 1, amplifier AMP, load feedback unit 1, driving control unit 2 and transformer M;
One end of AC power AC and the first inductance L 1one end connect, the first inductance L 1the other end simultaneously with the first electric capacity C 1one end, the first diode D 1positive pole and the 3rd diode D 3positive pole connect, the first diode D 1negative pole and the second diode D 2positive pole connect, the first diode D 1with the second diode D 2common port simultaneously with the 5th diode D 5positive pole and the second electrochemical capacitor C 3positive pole connect, the second diode D 2negative pole and the 4th diode D 4negative pole connect, the second diode D 2with the 4th diode D 4common port simultaneously with the first electric capacity C 1the other end be connected with the other end of AC power AC, the 5th diode D 5negative pole simultaneously with the 6th diode D 6negative pole and the second inductance L 2one end connect, the second inductance L 2the other end simultaneously with the first electrochemical capacitor C 2positive pole, metal-oxide half field effect transistor Q 1drain D and metal-oxide half field effect transistor Q 1parasitic capacitance C 5one end connect, the 6th diode D 6positive pole and the first electrochemical capacitor C 2negative pole all with the former limit inductance L of transformer M pdifferent name end connect, the secondary inductance L of transformer M sdifferent name end and the 7th diode D 7positive pole connect, the 7th diode D 7negative pole and the 3rd electrochemical capacitor C 4positive pole connect, the 7th diode D 7with the 3rd electrochemical capacitor C 4common port as the incoming end of the positive pole of LED, the secondary inductance L of transformer M ssame Name of Ends, the 3rd electrochemical capacitor C 4negative pole and the second resistance R 2one end all be digitally connected, the second resistance R 2the other end be connected with the in-phase input end of amplifier AMP, the second resistance R 2with the common port of the amplifier AMP incoming end as the negative pole of LED, the out-phase input access reference voltage V of amplifier AMP ref, the output of amplifier AMP is connected with the input of load feedback unit 1, and the output of load feedback unit 1 is connected with the input of driving control unit 2, driving control unit 2 output and metal-oxide half field effect transistor Q 1grid G connect, the first resistance R 1one end simultaneously with metal-oxide half field effect transistor Q 1source S and metal-oxide half field effect transistor Q 1parasitic capacitance C 5the other end connect, the 3rd diode D 3negative pole, the 4th diode D 4positive pole, the second electrochemical capacitor C 3negative pole, the first resistance R 1the other end and the former limit inductance L of transformer M psame Name of Ends all be in analog connected.
5th diode D 5, the 6th diode D 6, the second inductance L 2, the first electrochemical capacitor C 2, metal-oxide half field effect transistor Q 1with the first resistance R 1constitute the power factor correction unit of Buck-Boost circuit, described power factor correction unit works in DCM pattern, and the current waveform of Buck-Boost circuit as shown in Figure 2.At metal-oxide half field effect transistor Q 1the T1 period of conducting, input current is through the 5th diode D 5, flow through the second inductance L 2, the second inductance L 2electric current linearly increase, simultaneously give the first electrochemical capacitor C 2charging.By the first resistance R 1by the second inductance L 2peak current be converted to corresponding magnitude of voltage, this magnitude of voltage is as one of the parameter of peak value comparison method; At metal-oxide half field effect transistor Q 1the T2 period turned off, the electric current in circuit reduces, remaining transformer primary side leakage inductance L leakby the 6th diode D 6with the second inductance L 2feed back to the first electrochemical capacitor C 2in, carry out energy afterflow, decrease the loss of the working stage of Buck-Boost circuit.5th diode D simultaneously 5metal-oxide half field effect transistor Q can be prevented 1during disconnection, the secondary inductance L of transformer M in Flyback circuit sin former limit inductance L pthe reflected voltage V that place produces oRon the impact of input.This reflected voltage V oRinput voltage clamp can be made, cause input current to be 0, be unfavorable for that input current follows the tracks of input voltage, drives system power factor cannot be improved further.Through after a while, the second inductance L 2electric current reduce to zero; The 3rd T3 period, be the interrupted stage of Buck-Boost circuit, known according to formula (1), under the mode of operation of DCM, input current follows the tracks of input voltage, there is not phase difference.Therefore, when Buck-Boost circuit working is under DCM pattern, the function of good power factor correction can be played;
| I i n _ a v g ( t ) | = 1 2 D 2 V m | s i n ( w t ) | L 2 f s - - - ( 1 ) ;
I in_avgt () is average current input;
D is duty ratio;
V mthe voltage after input rectifying;
L 2it is the second inductance;
F sit is operating frequency;
W is power frequency 50Hz*2 π.
First electrochemical capacitor C 2, metal-oxide half field effect transistor Q 1, transformer M, the 7th diode D 7with the 3rd electrochemical capacitor C 4constitute Flyback circuit, its operation mode mainly contains following several stages: a) metal-oxide half field effect transistor Q 1conducting phase, the first electrochemical capacitor C 2as the input power of Flyback circuit, to the former limit inductance L of transformer M pcharging, former limit inductance L pelectric current linearly increase, the LED of access is by the 3rd electrochemical capacitor C 4energy is provided; B) metal-oxide half field effect transistor Q 1after disconnection, the former limit energy transferring of transformer M to secondary, now, secondary inductance L sin former limit inductance L pside produces reflected voltage V oR.By the 5th diode D 5avoid reflected voltage V oRimpact.Now, former limit inductance L pelectric current and metal-oxide half field effect transistor Q 1during conducting oppositely, leakage inductance L leakenergy by the 6th diode D 6, the second inductance L 2feed back to the first electrochemical capacitor C 2, this part energy is not consumed by absorbing circuit, avoids the loss of energy.This continuous current circuit is also the freewheeling path of Buck-Boost circuit working.Two parts circuit shares same afterflow passage, reduces topology design cost; C) when the electric current of the secondary of transformer M is zero, Flyback circuit enters the operating state of quasi-resonance, the leakage inductance L of transformer primary side leakwith metal-oxide half field effect transistor Q 1parasitic capacitance C 5, form resonant tank, its main resonance path is L leak-D 6-L 2-C 5.In this path, resonant stage is at metal-oxide half field effect transistor Q 1drain D, formation resonant voltage waveforms can be detected between source S.D) by detecting the lowest point of resonance, now metal-oxide half field effect transistor Q 1the voltage at two ends is lower, opens metal-oxide half field effect transistor Q 1the loss caused is minimum.Open position is generally less than input voltage size, metal-oxide half field effect transistor Q 1be similar to the low-voltage opening state being operated in zero voltage switch, reduce switching loss, improve the efficiency of system, the key operation waveforms of Flyback circuit as shown in Figure 3.
In Fig. 2, the implication of each parameter is:
I buck-boostit is the electric current in Buck-Boost circuit;
4 is the voltage after rectification;
3 is input average currents;
T1 is metal-oxide half field effect transistor ON time;
T2 is the metal-oxide half field effect transistor turn-off time;
T3 is the discontinuous current time.
In Fig. 3, the implication of each parameter is:
V dCthe first electrochemical capacitor C 2the voltage at two ends;
N is the turn ratio of the former secondary of transformer M;
Vo is output voltage;
I flybackit is the electric current in Flyback circuit;
Io is output current;
V dsmetal-oxide half field effect transistor Q 1drain D and source S between voltage;
I pKit is peak current.
Embodiment two: execution mode is the further restriction to a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in execution mode one, the 5th diode D 5, the 6th diode D 6with the 7th diode D 7be the diode of MUR1560 model.
Embodiment three: execution mode is the further restriction to a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in execution mode one, metal-oxide half field effect transistor Q 1it is the transistor of 17N80C model.
Embodiment four: execution mode is the further restriction to a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in execution mode one, the second inductance L 2inductance value be 231.61uH.
Embodiment five: composition graphs 4 illustrates present embodiment, present embodiment is the further restriction to a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in execution mode one, load feedback unit 1 utilizes TL431 benchmark to compare amplifying circuit, the Constant Electric Current flow valuve of load end is converted to voltage, compared by the 2.49V reference voltage of voltage dividing resistance circuit and TL431 inside, thus produce error signal.Driving control unit 2 is being fed back to through optocoupler PC817.For the output of load 50V1A, the parameter value of its main device is as shown in table 1.
Table 1TL431 amplifying circuit main devices parameter
Embodiment six: composition graphs 5 and Fig. 6 illustrate present embodiment, present embodiment is the further restriction to a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in execution mode one, driving control unit 2 selects NCP1207 chip as main control chip, and its controlling functions module map as shown in Figure 5.The sample voltage value of FB pin receiving transformer M secondary output current, CS pin receives and flows through metal-oxide half field effect transistor Q 1the sample voltage value of peak current, when CS pin sample the magnitude of voltage that obtains equal the magnitude of voltage that the sampling of FB pin obtains time, metal-oxide half field effect transistor Q 1shutoff; Demag pin senses metal-oxide half field effect transistor Q 1the voltage waveform of D, S two ends quasi-resonance, at " trough " of resonance, export pwm pulse, make the open-minded of metal-oxide half field effect transistor, it controls control signal oscillogram as shown in Figure 6.
Embodiment seven: composition graphs 7 illustrates present embodiment, present embodiment is the further restriction to a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in execution mode one, power factor correction unit achieves higher power factor, can more than 0.99 be reached, within the scope of input voltage 110V ~ 260V, THD is within 10%, meet the standard of international IEC6100-3-2, its input voltage and input current waveform as shown in Figure 7,5 is input ac voltages, 6 input AC electric currents.
Embodiment eight: composition graphs 8 illustrates present embodiment, a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in present embodiment, realize the switching mode of quasi-resonance, decrease the switching loss of metal-oxide half field effect transistor.Under the condition of nominal load, nominal input voltage 220V, system effectiveness is 87.72%.Most effective can to 90.91%, as shown in Figure 8,7 is metal-oxide half field effect transistor Q to metal-oxide half field effect transistor quasi-resonant switching waveform 1drain D and source S between voltage, 8 is driving voltages that resonance " trough " exports pwm pulse.
Embodiment nine: a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit described in present embodiment, the parameter of main devices is as shown in table 2.
The main devices parameter of table 2 drive circuit

Claims (4)

1., based on an one pole quasi-resonance LED drive device for Buck-Boost circuit and Flyback circuit, it is characterized in that: it comprises AC power (AC), the first inductance (L 1), the second inductance (L 2), the first diode (D 1), the second diode (D 2), the 3rd diode (D 3), the 4th diode (D 4), the 5th diode (D 5), the 6th diode (D 6), the 7th diode (D 7), the first electric capacity (C 1), the first electrochemical capacitor (C 2), the second electrochemical capacitor (C 3), the 3rd electrochemical capacitor (C 4), the first resistance (R 1), the second resistance (R 2), metal-oxide half field effect transistor (Q 1), amplifier (AMP), load feedback unit (1), driving control unit (2) and transformer (M);
One end of AC power (AC) and the first inductance (L 1) one end connect, the first inductance (L 1) the other end simultaneously with the first electric capacity (C 1) one end, the first diode (D 1) positive pole and the 3rd diode (D 3) positive pole connect, the first diode (D 1) negative pole and the second diode (D 2) positive pole connect, the first diode (D 1) and the second diode (D 2) common port simultaneously with the 5th diode (D 5) positive pole and the second electrochemical capacitor (C 3) positive pole connect, the second diode (D 2) negative pole and the 4th diode (D 4) negative pole connect, the second diode (D 2) and the 4th diode (D 4) common port simultaneously with the first electric capacity (C 1) the other end be connected with the other end of AC power (AC), the 5th diode (D 5) negative pole simultaneously with the 6th diode (D 6) negative pole and the second inductance (L 2) one end connect, the second inductance (L 2) the other end simultaneously with the first electrochemical capacitor (C 2) positive pole, metal-oxide half field effect transistor (Q 1) drain electrode (D) and metal-oxide half field effect transistor (Q 1) parasitic capacitance (C 5) one end connect, the 6th diode (D 6) positive pole and the first electrochemical capacitor (C 2) negative pole all with the former limit inductance (L of transformer (M) p) different name end connect, the secondary inductance (L of transformer (M) s) different name end and the 7th diode (D 7) positive pole connect, the 7th diode (D 7) negative pole and the 3rd electrochemical capacitor (C 4) positive pole connect, the 7th diode (D 7) and the 3rd electrochemical capacitor (C 4) common port as the incoming end of the positive pole of LED, the secondary inductance (L of transformer (M) s) Same Name of Ends, the 3rd electrochemical capacitor (C 4) negative pole and the second resistance (R 2) one end all be digitally connected, the second resistance (R 2) the other end be connected with the in-phase input end of amplifier (AMP), the second resistance (R 2) with the common port of amplifier (AMP) incoming end as the negative pole of LED, the out-phase input access reference voltage (V of amplifier (AMP) ref), the output of amplifier (AMP) is connected with the input of load feedback unit (1), the output of load feedback unit (1) is connected with the input of driving control unit (2), driving control unit (2) output and metal-oxide half field effect transistor (Q 1) grid (G) connect, the first resistance (R 1) one end simultaneously with metal-oxide half field effect transistor (Q 1) source electrode (S) and metal-oxide half field effect transistor (Q 1) parasitic capacitance (C 5) the other end connect, the 3rd diode (D 3) negative pole, the 4th diode (D 4) positive pole, the second electrochemical capacitor (C 3) negative pole, the first resistance (R 1) the other end and the former limit inductance (L of transformer (M) p) Same Name of Ends all be in analog connected.
2. a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit according to claim 1, is characterized in that: the 5th diode (D 5), the 6th diode (D 6) and the 7th diode (D 7) be the diode of MUR1560 model.
3. a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit according to claim 1, is characterized in that: metal-oxide half field effect transistor (Q 1) be the transistor of 17N80C model.
4. a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuit and Flyback circuit according to claim 1, is characterized in that: the second inductance (L 2) inductance value be 231.61uH.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN107493638A (en) * 2017-09-25 2017-12-19 江苏大学 Based on BOOST BUCK Converter Interleaving Parallel no electrolytic capacitor LED drive powers and switching method
CN110061638A (en) * 2018-01-19 2019-07-26 无锡华润矽科微电子有限公司 AC-DC driving circuit and encapsulating structure
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CN106332355A (en) * 2016-09-06 2017-01-11 上海大学 Non-isolated non-electrolytic capacitor LED driving power supply based on Boost and Flyback circuit integration
CN106332355B (en) * 2016-09-06 2018-06-01 上海大学 A kind of non-isolated no electrolytic capacitor LED drive power integrated based on Boost and Flyback circuits
CN106793255A (en) * 2016-11-29 2017-05-31 广西大学 A kind of new explosion-proof mining locomotive illuminating lamp
CN107493638A (en) * 2017-09-25 2017-12-19 江苏大学 Based on BOOST BUCK Converter Interleaving Parallel no electrolytic capacitor LED drive powers and switching method
CN107493638B (en) * 2017-09-25 2019-10-01 江苏大学 Based on BOOST-BUCK Converter Interleaving Parallel no electrolytic capacitor LED drive power and switching method
CN110061638A (en) * 2018-01-19 2019-07-26 无锡华润矽科微电子有限公司 AC-DC driving circuit and encapsulating structure
CN110061638B (en) * 2018-01-19 2020-12-18 无锡华润矽科微电子有限公司 AC-DC driving circuit and packaging structure
CN111130352A (en) * 2019-12-24 2020-05-08 安克创新科技股份有限公司 Control method of flyback switching power supply
CN113179021A (en) * 2021-04-28 2021-07-27 中国民航大学 Two-switch AC/DC LED driving device based on Flyback-Class E converter
CN113179021B (en) * 2021-04-28 2022-07-01 中国民航大学 Two-switch AC/DC LED driving device based on Flyback-Class E converter

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