CN106102206B - Lamp driving power - Google Patents

Lamp driving power Download PDF

Info

Publication number
CN106102206B
CN106102206B CN201610379407.9A CN201610379407A CN106102206B CN 106102206 B CN106102206 B CN 106102206B CN 201610379407 A CN201610379407 A CN 201610379407A CN 106102206 B CN106102206 B CN 106102206B
Authority
CN
China
Prior art keywords
resistance
voltage
connects
cathode
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.)
Expired - Fee Related
Application number
CN201610379407.9A
Other languages
Chinese (zh)
Other versions
CN106102206A (en
Inventor
李宗凤
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201610379407.9A priority Critical patent/CN106102206B/en
Publication of CN106102206A publication Critical patent/CN106102206A/en
Application granted granted Critical
Publication of CN106102206B publication Critical patent/CN106102206B/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
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
    • 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]

Abstract

Lamp driving power disclosed by the invention, no electrolytic capacitor, various circuit topology power supplys are sinuous pulsation DC voltage.Comprising: high frequency conversion circuit；It is triode operation in the self-excited oscillator of Sofe Switch state, power frequency ac voltage is transformed to the high frequency voltage of power frequency sinuous pulsation DC voltage amplitude modulation, provides the working power with mains isolation for LED drive circuit.LED drive circuit tool simulation pressure regulation, load parallel shunt and buck Buck circuit three classes control model, control circuit is without another standby independent direct current working power, to LED load lamp number, voltage without limitation.High frequency conversion circuit can be gas discharge lamp driving power source；Starting high pressure needed for it provides lamp activation, and with power tube over-voltage, drive lacking, lamp aging defencive function.

Description

Lamp driving power
Technical field
The present invention relates to LED and gas-discharge lamp driving power, it includes；
1: high frequency conversion circuit 2:LED driving circuit
Background technique
One: the drawbacks of lamp uses electrolytic capacitor with driving power；
1: using the lamp driving power of alternating current, because the industrial frequency rectifying electrolytic capacitor filter charging current angle of flow is less than 180 Degree, power factor reduces, and generates higher hamonic wave.
National standard, International Electrotechnical Commission IEC are to the equal prescribed specific index of power factor, the U.S. " Energy Star " Valuation Standard It is required that；House SSL lamp power factor is greater than 0.7 (5W) and is commercially greater than 0.9 with SSL lamps and lanterns (containing LED street lamp).
2: electrochemical capacitor life will determine the whole lamp service life, to the lamps and lanterns of built-in drive circuit, because of the work item of closed high temperature Part, electrochemical capacitor life will be substantially less that 50,000 hours life expectancies of LED lamp bead, and lamps and lanterns lose the advantage using LED." document 1 "
3: use Active Power Factor Correction Technology, circuit is complicated, and cost increases, and electrolytic capacitor filter operating condition because Working frequency is increased and is deteriorated, and is not suitable for the huge illumination market of demand, is particularly unsuitable for small-power lamps and lanterns.
Using passive valley-fill circuit, though improving power factor, electrolytic capacitor quantity is really increased.
In conclusion driving power cancels electrolytic capacitor, it is to improve lamp power factor, reduce higher hamonic wave, extend lamp Have service life, simply effective measures, there is now no electrolytic capacitor driving chip application.
Two: the shortcoming of high frequency conversion circuit；
Power frequency alternating current is converted to different grades of power frequency amplitude modulation high frequency voltage by high frequency conversion circuit, is provided negative with LED light Matched AC power source is carried, driving power, that is, electric ballast for gas-discharge lamp.
Circuit is a kind of progress of the authorized patent of invention of inventor " electronic ballast for gas discharging lamp "；
The patent No. (2007101523548)
Former translation circuit problem to be modified is as follows；
1: power tube overvoltage protection；
Transistor collector voltage is the vector sum of the shunt-resonant circuit LC high-frequency oscillation voltage and transient power frequency parameter.
In triode overdrive condition, resonant tank high-frequency oscillation voltage amplitude will exceed transient power frequency parameter, three poles Pipe can not be resistant to the high pressure that power-frequency voltage peak value overlapped high-frequency oscillation positive half cycle peak value occurs.Primary circuit is only with Bake diode Clipping copes with translation circuit different loads demand, adds power frequency or high frequency peaks limiter mode, control high-frequency oscillation voltage vibration Width.
2: the protection of power tube drive lacking；
Higher-order of oscillation amplitude must be slightly larger than supply voltage, in higher-order of oscillation negative half period peak value, transistor collector voltage Driving when being zero, so that it works in Sofe Switch state, if core saturation, circuit load is aggravated, and oscillation amplitude reduces, power Pipe drive lacking is detached from Sofe Switch state, will lead to that power tube power consumption is excessive and burn, and primary circuit is arranged without the protection of drive lacking state It applies.
Corresponding " document 2 " the 2.3.5.3 hard switching protection of this circuits improvement, the saturation protection of 2.3.5.4 choke coil.
3: power tube shutdown；
Primary circuit is coupled using high frequency capacitance, utilizes resonance potential change rate, driving auxiliary shutdown triode ON, short circuit Power tube base, emitter-base bandgap grading switch-off power pipe, triode cut-off bias are provided by emitter diode voltage, and circuit topology needs to simplify.
4: gas-discharge lamp start-up mode；
Primary circuit is superimposed multiplication of voltage mode with the higher-order of oscillation using capacitive energy storage level and activates gas-discharge lamp, start-up circuit mistake In complexity.
5: gas-discharge lamp die of old age (EOL) detection；
By new national standard GB19510.4 (17.1 sections) standard requirements, primary circuit deficency body discharging lamp aging detection and protection are arranged It applies.
Three: miscellaneous LED lamp drive circuit；
1: direct current constant current LED lamp driving power control chip is many kinds of, and all chips must be straight in separate configurations, restriction Low-pressure state work is flowed, different chip supply voltages differ, and driver control circuit power supply can not general and standardization.
According to internal high-voltage constant current source power supply, chip heats up because power consumption increases.
2: temperature detection is served only for the shutdown of chip itself overtemperature, no LED temperature rise control, and LED temperature rise really determines its use Service life.
Four: cancelling the LED light driving chip status of electrolytic capacitor；
1: low-pressure side filters driving power chip
Chip model TK5401 " document 3 " " document 4 "
(1): by the standard sequence figure of " document 3 " figure (3-86) TK5401 voltage output of page 121, input power-frequency voltage rectification Electrolytic capacitor filtering, chip V are not used afterwardsCC andPower supply and LED current are power frequency trapezoidal wave.
(2): being illustrated by " document 3 " figure (3-88) initiating sequences of page 122, chip power VCCIt need to be after each power frequency zero passage Restarting, complicates control model.
2: high-pressure subsection linear constant current driving circuit
Chip model MAP3012B " document 5 "
" document 5 " Fig. 4-21 AC input current multi-stage constant current control waveform diagrams of page 103 are shown in its application
Fig. 4-27 20W high-voltage linear the constant-current drive circuits of page 111
(1): there are 100 weeks vision stroboscopics with power-frequency voltage zero passage, lamps and lanterns in circuit LED current envelope.
(2): chip controls are excessively complicated, timesharing drive segment lamp string, and lamp bead utilization rate is low.
(3): when input voltage variation is beyond 10%, the disadvantage that part lamp bead is dimmed or passes through without electric current occur.
3: the non-isolated buck intelligent LED driving circuit with PFC
Chip model FL7701 " document 6 " Fairchild Semiconductor, U.S. product.
See the basic principle of " document 6 " Fig. 7-7-3 pfc circuit of page 227
The work wave of Fig. 7-7-4 pfc circuit of page 228
FL7701 is composed in series buck pwm driver by LED load, current-limiting inductance and power switch tube.Because power frequency is whole Without smothing filtering after stream, LED current envelope following power frequency full-wave rectification sinuous pulsation changes, and power factor is improved.
It can be discussed using the following control models of the driver of the chip:
(1): driver MOS switch pipe power supply is the power frequency sinuous pulsation DC voltage without smothing filtering, UCCFor power frequency Pulsation trapezoidal wave, has automatically provided power frequency zero point, has separately set zero point computing circuit in chip and have no contribution to control function.
(2): LED current sampling resistor voltage has been provided for controling parameter, to the LED electricity that envelope is power frequency sinuous pulsation Stream, in the limited fluctuation range of input voltage, control peak point current is the average value for controlling DC current, and chip is through operation Reference voltage is generated, for controlling LED current envelope following power frequency sinuous pulsation, control model is excessively complicated.
(3): LED current envelope is power frequency sine wave, because crest ratio numerical value is larger, lamps and lanterns is made 100 weeks visual flickers occur.
(4): MOS switch pipe unnecessarily works according to switch state at any time, it is only necessary to enable LED current in power frequency supply The setting electric current moment is reached, into pulsewidth modulation state, switching power loss and electromagnetic interference will substantially reduce.
(5): the temperature rise that detection chip oneself power consumption generates, no LED temperature rise control function for determining lamp life.
4: new departure of light emitting diode constant flow regulation
Device type NSI (50010~45030)
The device is connected using automatic biasing constant-current transistor adjuster with LED, and the application of 110 volts or 220 volts power supplies is exchanged Circuit is shown in " document 7 ".Device pressure resistance is less than 30mA lower than 50V, electric current, and LED current value is not adjustable, no temperature control function.
Background technique bibliography
" document 1 " [light source and illumination] the 3rd phase page 19 in 2013
From quality-improving in terms of alminium electrolytic condenser typical failure analysis of cases
Huang Weihua Tao Shu Chinese catalpa
" document 2 " [light source and illumination] the 1st phase page 4 in 2014
A kind of High Power Factor linearity light adjusting fluorescent lamp ballast
Sun Peng Mao Xingwu
" document 3 " [LED illumination driving circuit designs application example]
China Electric Power Publishing House in April, 2015 of page 119~125
5W LED wall lamp driver design based on TK5401
Carry out the clear people
" document 4 " [LED illumination driving power optimization design]
China Electric Power Publishing House in April, 2015 of page 137~141
The LED constant-current driver of no electrolytic capacitor device
Sha Zhanyou etc.
" document 5 " [EMC Design and application of LED lamp]
Electronic Industry Press page 102~page 112 of in April, 2015
High-pressure subsection linear constant current driving circuit
Shanghai Zheng Yuan Electron Technology Co., Ltd Huang Minchao
" document 6 " [LED illumination driving power optimization design]
China Electric Power Publishing House in April, 2014 of page 225~229
Non-isolated buck intelligent LED driver with PFC
Sha Zhanyou etc.
" document 7 " [light source and illumination] the 4th phase page 11~12 in 2013
New departure (Fig. 3~6) of light emitting diode constant flow regulation
Yang Yujie Song Yong soldier Mao Xingwu
Summary of the invention
Problem to be solved of the present invention is:
Using power frequency supply, cancel electrolytic capacitor, rectifier output voltage is without smothing filtering, all kinds of lamps driving power electricity Road topology can work under the dither direct current supply voltage conditions that power frequency or envelope are power frequency.
One: high frequency conversion circuit；
Amplitude modulation high frequency electric source with mains isolation is provided, gas-discharge lamp is driven, or is isolated with LED drive circuit composition Driver.
1: preventing power-frequency voltage peak base overdrive condition, power tube over-voltage breakdown.
2: preventing power tube because of base stage drive lacking, into linear work area, power consumption increases tube temperature and increases and burn.
3: cancelling auxiliary shutdown triode, simplify power tube cut-off method.
4: simplifying gas-discharge lamp and activate starting method.
5: setting gas-discharge lamp aging and LED light string extinguish detection protection circuit.
6: according to loading and being depressured impedance property, changing high frequency conversion circuit clips mode.
Two: LED lamp drive circuit；
1: simplifying driver control circuit power supply, without individually separately setting power supply.
2: LED light number, load voltage, input voltage variation, drive circuit topological novariable need to be adapted to.
3: with universal component form stanndard unit, according to control model by its flexible combination be each quasi-driver.
4: simulation or PWM mode control and constant LED light DC pulse current average can be used.
5: automatically adjusting its operating current according to LED temperature.
6: eliminating or reduce the visual flicker that no electrolytic capacitor filtering power frequency power supply generates.
Technical scheme and beneficial effects
To solve summary of the invention described problem, the present invention takes following measures；
One: high frequency conversion circuit protection measure；
1: adding resonant tank energy feedback power mode clipping, reduce Bake clamping losses, improve power conversion circuit Energy Efficiency Ratio, and prevent power frequency crest voltage power tube over-voltage breakdown.
2: detection higher-order of oscillation amplitude cuts off starting current lower than transient power frequency parameter, prevents power tube drive lacking.
3: utilizing timing capacitor negative pressure, timed resistance provides cut-off bias for power tube, simplifies breaking circuit.
4: gas-discharge lamp activation；Light condition use nonlinear transformation, broadening frequency spectrum higher hamonic wave series resonance, Start gas-discharge lamp, circuit reduction and without fundamental series resonance Starting mode starting be unsuccessfully directed at power tube damage the drawbacks of.
5: side winding is paid in ballast inductance setting, and when its voltage of discharge lamp aging reduces, i.e., short-circuit starting current realizes the lamp longevity Protection eventually.
6: product can be stored for a long time, and no electrolytic capacitor electrolyte is withered, need to gradually boost reenabiling the drawbacks of.
It is real that 7: Zeng Yong 7 ballast makees the simulation service life in output end open circuit, short circuit, lamp aging and rated load condition respectively It tests, is powered interval 15 seconds 5 seconds, 20,000 3 thousand fault-frees of work stop trying, and switched in terms of once daily, are equivalent to and have used 300 years.
Two: multiple functional, simplify and to be easy to combined LED lamp drive circuit topological；
1: without using special chip, by universal component composition function unit, being combined into simulation according to control model group, switch drives Dynamic circuit.
2: utilizing LED light forward direction C-V characteristic, several LED series voltages are as control circuit power supply, all types of driving electricity Road method of supplying power to is identical, changes LED light load voltage, and standardized driving circuit topology is unchanged.
3: detection LED light forward voltage drop automatically adjusts lamp current according to LED temperature to judge lamp bead temperature rise.
4: changing current setting value, change LED current pulsating waveform, current wave crest ratio can be reduced, reduce lamps and lanterns vision and dodge It is bright.
5: using three-phase alternating voltage commutating DC export natural characteristic, reduce LED current crest ratio, improve power because Number.
6: can realize the same level or group's light modulation with changing resistance or changing voltage system.
The basic functional units of standard, a variety of combined control model, the working power of simplification, terse circuits of being easy to are opened up It flutters, optimal transfer efficiency, extremely strong adaptability, no electrolytic capacitor, High Power Factor, low harmony wave, long-life, items as above are arranged It applies and greatlies simplify LED lamp drive circuit, maximizing reduces driver cost.
Detailed description of the invention
The present invention is LED and gas-discharge lamp general driving power supply, without smothing filtering, nothing after AC-input voltage rectification Electrolytic capacitor, all kinds of circuit work powers are sinuous pulsation DC voltage.
Fig. 1 is the isolated simulation pressure regulation LED driver of PNP pipe；Fig. 2 is NPN pipe LM158 simulation pressure regulation LED driver；
Fig. 3 is isolation type high frequency capacitance decompression TL431 parallel shunt driver；Fig. 4 is the load parallel shunt driving of NPN pipe Device；
Fig. 5 is three-phase alternating voltage input PNP pipe Buck driver；Fig. 6 is NPN pipe Buck driver；
Fig. 7 is single tube Amplitude Modulation High Frequency resonant mode gas discharge lamp drive；Fig. 8 is two-tube Amplitude Modulation High Frequency formula translation circuit；
One: LED lamp driver
LED driver can be divided into simulation and switching regulation circuit, constant LED DC pulse current average, with high frequency Translation circuit group is combined into isolated driver, and it is non-isolated driver that driving circuit, which works independently,.
It will illustrate by taking three classes control model as an example as follows；
Peak value current limliting simulates pressure-adjusting type driver (Fig. 1~2)
Parallel shunt formula peak value current limiting driver (Fig. 3~4)
PWM constant current and shutdown pulsewidth Buck driver (Fig. 5~6)
Driver high-frequency ac translation circuit is soft for transformer coupled, single pliotron, collector amplitude modulation, resonant mode Power frequency ac voltage is transformed to Amplitude Modulation High Frequency voltage by the high-frequency self-excitation oscillator of switch change-over, for LED drive circuit provide every From power supply.
All kinds of LED drive circuits are adjusted, control circuit is not necessarily to separately set low-voltage dc power supply, are derived from several levels series LED Voltage.LED forward direction slope is precipitous, and increases with the junction temperature rate of rise, as long as input voltage can make to be considered as pressure stabilizing The LED of power supply is worked normally, driving circuit to LED light string quantity, input voltage type, numerical value without limitation, can be in direct current, work Frequency exchange, the input voltage work of Amplitude Modulation High Frequency different type, any number, circuit topology do not change with supply voltage and are become It is dynamic.
Circuit changes automatic adjustment driving current with LED temperature, so that LED is worked in best temperature rising state, LED forward voltage Temperature coefficient is negative 2.5~4mv/ DEG C, related to LED material, and temperature control voltage is derived from the LED light string electricity of the reaction practical temperature rise of LED Pressure.Using current limliting, constant current technology, cooperates temperature control function, can utmostly set driving current, make full use of LED electric light Transfer capability makes light source have optimum efficiency and increases LED life.
LED power frequency sinuous pulsation current envelops make lamp luminescence visual flicker occur, reduce current setting value, LED current Trapezoidal wave will be approached by sinuous pulsation, LED current crest ratio can be reduced, and reduce visual flicker and spectral drift.
Attached drawing is said by taking the element circuit that accurate adjustable shunt regulator TL431, operational amplifier LM158 are formed as an example respectively It is bright.
TL431 cathode (3 foot) is output end, and built-in open collector triode, input reference voltage are 2.5V, reverse phase is defeated Enter end and sucks the operational amplifier that electric current reaches 100mA for (1 foot), anode (2 foot) earthing potential, cathode." document 7 "
1: peak value current limliting simulates pressure-adjusting type driver (Fig. 1~2)
Circuit is the current stabilization circuit that operational amplifier belt current adjusts triode, to change the triode etc. with load in series Imitate resistance mode limitation, constant LED DC current average value.
It is succinct that TL431 direct current shown in " document 7 " inputs analog regulation constant-current circuit, but because adjustment state power consumption is big, and Need to work independently power supply.Pulsating dc voltage power feed driver, control circuit using LED load voltage as working power, though in mould Quasi- pressure regulation work status, but regulatory region is controllable, in power frequency half-wave time width, when the reduction of regulatory region ratio, then adjusts voltage magnitude It is small, triode is low in energy consumption, and adjustment process can simplify circuit input end filtering measures without electromagnetic interference.
Regulation power triode is connected with LED light, if the not super setting value of LED current, triode is in lossless conducting State.When instantaneous AC input voltage makes the super setting value of LED current, triode internal resistance will be increased, limit LED current, it is permanent Determine pulsating direct current current average, pliotron is subjected to the power consumption of adjustment state generation.
2: parallel shunt formula peak value current limiting driver (Fig. 3~4)
Series connection simulation reduction regulation, triode will bear to be positively correlated with power current current flow angle, the power consumption that adjustment process is led to.
Pulsating dc voltage power supply parallel shunt formula driver, driver AC-input voltage is depressured through reactance, after rectification Straight to drive LED light, current regulation triode series connection consumption reduction resistance is in parallel with LED load, if in instantaneous AC input voltage LED electricity Stream does not transfinite, and triode will be in an off state, and there are few losses for driver.
Into adjustment state, triode conducting when instantaneous AC input voltage enables LED current be equal to setting value is adjusted State equivalent load resistance reduces, and different from triode internal resistance decompression mode, the voltage that overflows is absorbed by reactance, and triode only divides Stream sucking is transfinited portion of electrical current, and it is extremely low that driver enters constant flow regulation state power consumption, is less than simulation pressure-adjusting type driver.
3:PWM constant current and shutdown pulsewidth Buck driver (Fig. 5~6)
Aforementioned two quasi-drivers power consumption and power frequency supply angle of current conduction are positively correlated, such power consumption of driver and current flow angle not phase It closes.
LED drive circuit topology is by element circuit current detecting grade, temperature controlled stage, monostable flipflop and power switch Pipe tandem electric inductance forms Buck step-down conversion circuit.Because LED current setting value is constant, power switch tube current pulsewidth is by power frequency electric Instantaneous value modulation is pressed, driver works in frequency hopping, Frequency mode.It is true by the temporary steady state time of monostable flipflop to turn off pulsewidth Fixed, it is isolated driver with high frequency conversion electrical combination that Amplitude Modulation High Frequency, direct current, the input of power frequency pulsating volage, which can work,.
Three-phase alternating voltage shown in (Fig. 5) inputs non-isolated driver, to eliminate unidirectional current to supply transformer iron core Magnetization, using the circuit topology with the neutral conductor, anode half bridge and supply transformer middle line respectively form solely common cathode together Vertical power supply, respectively two groups of identical LED load power supplies, the DC voltage that output inferred-zero, three times power frequency are pulsed.Its advantage is such as Under；
(1): concentration rectification mode can be used, reduce power supply line number, be particularly suitable for street lighting.
(2): load current crest factor is decreased to 0.185, and there are few visual flickers for light.
(3): three-phase half-bridge power factor is 0.687, is not necessarily to PFC." document 8 "
Two: gas discharge lamp drive (Fig. 7~8)
Gas discharge lamp drive circuitry is the high frequency conversion circuit independently used, i.e. electric ballast；
1: single tube Amplitude Modulation High Frequency resonant mode gas discharge lamp drive (Fig. 7)
2: two-tube Amplitude Modulation High Frequency resonant mode translation circuit (Fig. 8)
Start demand to adapt to gas-discharge lamp, it is by higher-order of oscillation negative half period voltage slicing, then non-in circuit light condition Linear transformation characteristic makes higher-order of oscillation video stretching, is first starter using higher hamonic wave LC series resonance voltage superposition fundamental wave And discharge lamp is activated to generate high pressure again for power frequency zero crossing.
Driver detects ballast reactance vice-side winding voltage, realizes that lamp is died of old age protection, and triode overvoltage and deficient is arranged Driving protection.
Detailed description of the invention bibliography
" document 7 " [Motorola linearly with interface circuit handbook] (volume two)
China Machine Press's in September, 1994
(voltage reference) 5- (16~23) page
The general equal compiling of Motorola Inc. Liu Ren
" document 8 " [power converter circuit]
China Machine Press in October, 2008 of page 68
It is translated through Zhang Zhengnan in Shen
Specific embodiment
One: LED lamp constant current driver
1: peak value current limliting simulates pressure-adjusting type driver (Fig. 1~2)
1-1:PNP manages isolated simulation pressure regulation LED driver (Fig. 1)
Driver is made of high frequency conversion circuit with LED drive circuit, is LED load between driving circuit terminals PH, JH Lamp string.
JI1, JI2 power frequency input voltage, rectified bridge DZ rectification, capacitor CL filter out high fdrequency component, export the positive taut pulse of power frequency Dynamic DC voltage, powers for high frequency conversion circuit.Amplitude Modulation High Frequency voltage is depressured through high frequency transformer TP, is LED drive circuit electricity Source.
(1): high frequency conversion circuit start；
Transformer TP primary side winding and capacitor CP form shunt-resonant circuit, are triode QP collector load, starting electricity It hinders RQ to charge to timing capacitor CT, until triode QP conducting starting oscillation.
Transformer TP feedback winding low side is connected with timing capacitor CT, and the high-end feedback voltage of feedback winding is shifted after starting Inductance LY, base isolation diode DF, QP base emitter-base bandgap grading establish negative pressure for CT reverse charging, and charging current pulses, that is, QP base stage is driven Streaming current, triode QP collector current pulse are resonant tank energy storage, to motivate resonant tank to generate oscillation.
Triode QP base isolation diode DF anode voltage is timing capacitor CT direct current negative level, superposition charge and discharge saw The negative voltage of tooth wave and the vector sum of high frequency feedback sine voltage, are only positive in feedback voltage positive half cycle peak value finite region Value.
It is zero when high frequency voltage drops to QP collector voltage according to sinusoidal rule after oscillation is established, feedback voltage drives QP Conducting, capacitor CT charging, when the sawtooth wave negative pressure that charges is greater than feedback voltage instantaneous value, diode DF shutdown, QP driving current Disappear, QP collector voltage will rise according to resonance rule, and feedback voltage is then declined with identical rule, capacitor CT negative pressure by with base The timing resistor RT of pole isolating diode DF parallel connection, provides cut-off negative pressure for QP base stage, keeps QP collector fast in zero-voltage state Speed cut-off.
Start-up resistor RQ and timing resistor RT discharges, to CT through QP base stage negative pressure limiter diode DB for capacitor CT negative pressure It is discharged to QP collector resonance potential and drops to zero again, the high frequency feedback voltage transient lagged through feedback voltage phase shift inductance LY Value, when being greater than capacitor CT negative pressure, there is the driving pulse broadened by inductance LY in QP base stage, and QP is connected in Sofe Switch state again.
(2): high-frequency voltage amplitude control；
To prevent triode QP from puncturing, translation circuit need to control high-frequency voltage amplitude, make power frequency crest voltage and high frequency vibrating The sum of positive half cycle crest voltage is swung, QP collection, emitter-base bandgap grading pressure voltage are lower than.
Enter overdrive condition in circuit zero load QP base stage, high-frequency oscillation voltage amplitude increases, and negative half period voltage amplitude is big In the high frequency voltage of transient power frequency parameter, negative pressure is generated in QP collector isolating diode DC anode, DC is blocked, QP current collection Electrode current is zero, and to oscillation without contribution, resonant tank energy storage is reduced ideal base drive current.
Clamp diode DBK in Bake is accessed between base isolation diode DF anode and collector isolating diode DC anode, When negative pressure occurs in DC anode, QP ideal base drive current is branched to resonant tank, QP driving current is controlled critical by DBK conducting State.
DC and DBK collective effect, circuit will follow transient power frequency parameter volitional check high-frequency voltage amplitude, allow negative Carry open circuit light condition work.The resistance RC in parallel with diode DC is for removing the remaining electricity of off state triode QP collector Lotus.
(3): LED drive circuit；
Amplitude modulation high-frequency input voltage is rectified through high-frequency rectification bridge DZG, capacitor CLG is filtered, high frequency voltage is demodulated into power frequency Sinuous pulsation DC voltage is driving circuit power supply.LED light string between DZG outlet terminal PH, JH not draw.
Stanndard unit circuit TL431 current detecting grade DI can be considered voltage comparator or summing amplifier, with mutually defeated Entering end is built-in 2.5V reference voltage, and inverting input terminal is TL431 control electrode, with PNP triode QI composition current regulation electricity Road.
Resistance RDQ provides starting driving current for LED, and voltage-stabiliser tube DBH provides overvoltage protection, DH2, DH1 view for DI cathode For voltage-stabiliser tube, series voltage is control circuit voltage, and circuit is unlimited to the LED load voltage for being greater than DH2, DH1 series voltage System.
Voltage-stabiliser tube DW current-limiting resistance RW voltage is derived from DHI, DH2 series voltage drop, divider resistance RI1, the RI2 in parallel with DW Branch pressure voltage is DI control electrode input voltage, determines driving circuit LED current setting value.DI is electric current through cathode resistor RJH It adjusts triode QI and driving current is provided, if input voltage instantaneous value LED current is less than setting value, DI and QI and leads in saturation state Logical, driver is lossless.
DI anode is connected LED current sampling resistor RI ground connection, RI voltage increase TL431 anode potential improves TL431 internal reference voltage is equivalent to boost amplifier non-inverting input terminal voltage, when RI voltage is equal to setting value, DI work electricity Stream is that QI driving current reduces, and is in linear work area together, and QI equivalent resistance increases, to limit LED drive current.
Different from " document 7 " fixed constant current mode, current setting value is programmable, and output electric current is expansible.
It is another input voltage of DI reverse side that LED temperature, which controls resistance RWT, is derived from DH1, DH2 series voltage drop, when LED temperature rises, pipe drops, and LED current setting value will reduce, and realizes temperature control function.
1-2:NPN pipe LM158 simulates pressure regulation LED driver (Fig. 2)
Driver shaping modes are with (Fig. 1), and circuital current detects grade UIA and replaces TL431 by double operational LM158, with electric current It adjusts NPN triode QI and its constant current pushes grade QHL to form driver.It is unillustrated LED light string between PH, JH.
DH3, DH2, DH1 series voltage are the working power of UI amplifier LM158, and driver control circuit is connected with LED Equivalent load resistance is matched, and power frequency any number input voltage is worked asynchronously by power frequency trapezoidal wave.
It powers on rear start-up resistor RQ and provides starting driving current for QHL, QI is driven by QHL and is connected, and QI driving power is derived from LED light DH1~DH4 and triode QI series voltage drop.
Current detecting grade UIA output end controls QI driving current, driving circuit load equivalent resistance through pull-up resistor RJH For the sum of QI and LED internal resistance, working condition is being adjusted, is being increased with QI internal resistance, DH4 anode voltage, that is, QI driving voltage rises, shape At control circuit positive feedback loop, constant current triode QHL base penetrates knot and LED pipe HD4, constant QHL emitter resistance RHL voltage, composition Constant-current source bears driving voltage variation, makes QI driving current from QI collection, penetrates voltage variations affect.
UIA inverting input terminal is the sum of two voltages；One is divider RI1, RI2 partial pressure value concatenation electricity for being derived from DW voltage Flow sampling resistor RI voltage, secondly be input resistance be RWT LED temperature control voltage, this two voltage and, with UIA together it is mutually defeated Enter end, voltage-stabiliser tube DW voltage difference is LED current setting value.
If the not super setting value of LED current, UIA exports high level, triode QI saturation conduction.When input voltage instantaneous value makes LED current sampling resistor RI voltage rises, until UIA reverse phase is equal with non-inverting input terminal voltage, triode QI enters linear work Area, internal resistance increase, and LED light string electric current is maintained at setting value, and driver works in current limliting adjustment state.
DH1~DH3 lamp series voltage is capacitor CLW charging through resistance RLW, and CLW voltage will change with LED temperature rise, is The non-inverting input terminal voltage of LM158 voltage follower UIB, UIB output termination temperature resistance RWT, controls LED current setting value, When LED temperature raised voltage declines, current setting value reduces, and driver will follow LED temperature rise to change driving current.
2: parallel shunt formula peak value current limiting driver (Fig. 3~4)
The quasi-driver driving circuit needs reactance decompression power supply, when LED load is shunted by triode, by reactance current limliting.
2-1: isolation type high frequency capacitance decompression TL431 parallel shunt driver (Fig. 3)
(1): high frequency conversion circuit resonance voltage clipping；
(Fig. 3) high frequency conversion circuit and (Fig. 1) are similar, and triode QP works in weak overdrive condition, and the higher-order of oscillation only exists Power-frequency voltage peak value clipping, except in clipping state, amplitude modulation high frequency voltage is sine wave, to adapt to high frequency capacitance decompression.
Rectifier bridge DZ output voltage is peak holding capacitor CVM charging through isolating diode DVM, and discharge resistance is high value Start-up resistor RQ, CVM voltage will remain in power-frequency voltage peak value.High frequency transformer TP pay margin width winding high frequency voltage amplitudes with Transient power frequency parameter is equal, one end ground connection, and the other end connects limiter diode DXF, and DXF cathode voltage is capacitor CVM work Frequency crest voltage, then only when high frequency voltage is greater than power frequency peak value, higher-order of oscillation energy feedback CVM is limited high frequency by DXF conducting Oscillatory voltage amplitude.
(2): TL431 parallel shunt driving circuit；
High frequency transformer is paid side output voltage and is depressured through capacitor CH, high-frequency rectification, capacitor CLG filtering, rectifier bridge DZG output It is power frequency pulsating high frequency DC voltage for power frequency pulsation or envelope, provides isolated power supply for LED drive circuit.
Triode series connection consumption reduction resistance RJH is in parallel with LED load built in TL431 current detecting grade DI, and driving circuit can be DI cathode is greater than any number voltage power supply of DH2, DH1 series voltage lower than 36V.
Voltage-stabiliser tube DW current-limiting resistance RW is derived from DH2, DH1 series voltage, and anode is rectifier bridge DZG negative output terminal.
Filter capacitor CW and thermistor RRM, RI1 series resistance, with RI2, LED current sampling resistor RI series resistance point Volt circuit is in parallel with DW, and partial pressure value determines that DI controls pole tension, i.e. LED current setting value, and LED current is cut less than setting value DI Only, DZG rectification exports straight-through LED load, and circuit works in loss-free conditions.
When LED current reach setting value, triode ON built in DI through RJH by DZG output LED transfinite portion of electrical current shunt.
Negative tempperature coefficient thermistor RRM works as LED temperature for detecting LED temperature rise, welding or being adhered on circuit board Rise, RRM resistance reduces, and LED current setting value reduces, and driver will follow LED temperature to automatically adjust LED operation electric current.
DI cathode series resistor RJH limits shunt current value for reducing DI power loss.
2-2:NPN pipe loads parallel shunt driver (Fig. 4)
The driver current detects grade DI and drives outer attached parallel shunt NPN triode QI, to promote load voltage, increases negative Electric current is carried, the both ends terminals Z are ac buck reactance.
DI cathode drives QI through pull-up resistor RDI, through LED thresholding diode DQM, after DI anode is in parallel with QI emitter-base bandgap grading, string Connect current sampling resistor RI ground connection.Because of DI conducting voltage about 2V, LED diode DQM is sealed between cathode and QI base stage.
TL431 current detecting grade DI be voltage comparator, power supply be derived from be considered as Zener voltage-stabiliser tube LED light DH1, DH2 series voltage, LED light string number or lamp load voltage arbitrarily change between adapting to PH and JH, driving circuit topological novariable.
Quoted from RW current limliting, resitstance voltage divider RI1, RI2 branch pressure voltage of voltage-stabiliser tube DW voltage controls resistance with by temperature The temperature control voltage of RWT input, it is common to determine LED current setting value.
For LED current in setting value, QI shutdown is connected in DI, and rectifier bridge exports electric current and is equal to LED load electric current, when LED electricity Stream transfinites, and DI anode RI voltage is equal to setting value, DI shutdown, driving QI conducting, the electric current steering triode QI to transfinite, RI electric current For the sum of LED light electric current and QI shunt current.
QI can reduce LED current setting value in low power consumption switch work status, circuit, make driving current trapezoidal wave.
The constant shutdown pulsewidth Buck driver (Fig. 5~6) of 3:PWM
Identical as aforementioned circuit, such driver control circuit working power is derived from DH2, DH1 series voltage.
3-1: three-phase alternating voltage inputs PNP pipe Buck driver (Fig. 5)
Three-phase alternating current input voltage is respectively Standalone Drives electricity with supply transformer middle line by full-bridge rectification, the output of two half-bridges Source.
Circuit forms temperature controlled stage DV by the TL431 for being considered as operational amplifier and current detecting grade DI, DV output is DI provides control pole tension, and changes current setting value automatically according to LED temperature, and DI is triggered according to LED current value by triode The monostable flipflop of QTD, QF composition, QTD drive PNP switching tube QI, tandem electric inductance LBK and LED load composition Buck to drive Dynamic device.
(1): functional unit circuit；
Temperature controlled stage DV is typical adjustable shunt regulator, can be considered addition proportional amplifier, output end TL431 cathode Pull-up resistor RDV, feedback resistance RV1 are connected, inverting input terminal is TL431 control electrode；One input resistance RV2 input voltage is Zero potential, another input temperature resistance RWT input voltage are derived from LED light DH2, DH1 series voltage, and output voltage is with LED temperature Variation.
Current detecting grade DI and pull-up resistor RDI forms voltage comparator, and temperature controlled stage DV cathode output voltage is through electricity RI1, RI2 branch pressure voltage are hindered, controls pole tension, i.e. LED current setting value for TL431, value is less than TL431 reference voltage 2.5V, RI2 concatenate LED current sampling resistor RI ground connection, then RI voltage will determine the working condition of driving circuit.
If LED current is turned off less than setting value DI, cathode exports high level, and LED current is greater than the set value DI and exports low electricity It is flat.
When LED temperature increases, tube voltage is reduced, and the voltage that temperature controlled stage DV is inputted through temperature resistance RWT reduces, and DV is defeated Voltage, that is, current detecting grade DI control pole tension increases out, and driver will automatically adjust LED current with LED temperature.
(2): PNP switching tube QI working condition；
The start-up resistor RQ series diode DQ for being derived from rectifier output voltage provides base current for driving triode QTD, It is connected jointly with the PNP switching tube QI driven through QTD collector resistance RTD, DH2, DH1 series voltage are isolated through diode DGV CGV filtering establishes power supply for control circuit, and timing resistor RT series connection negative pressure isolating diode DBG separately provide base drive for QTD Electric current.
Driving triode QTD and QF form monostable flipflop, the timed capacitor CT of QTD base diode DBG anode with The coupling of current detecting grade DI cathode, when LED current is through inductance LBK linear rise to setting value, DI is connected, DI cathode output electricity Pressure reduces rapidly, and diode DBG anode obtains negative pressure, and QTD and switching tube QI are turned off, and DI cathode is clamped to zero, tieed up by QF conducting The temporary stable state of circuit, i.e. the shutdown pulsewidth of LED current are held, diode DX is LED afterflow through inductance LBK.
QF conducting simultaneously sucks start-up resistor RQ electric current through diode DQF, and exempting RQ influences driver shutdown pulsewidth.
For timing resistor RT through the extremely capacitor CT reverse charging of QF current collection, CT voltage rises to triode QTD conducting, and QF ends, Switching tube QI is conducted to LED current again and rises to setting value, is the electric current pulsewidth of driver.
(3): light-modulating mode；
(3-1): the same level light modulation: change timing resistor RT, the temporary steady state time constant of monostable circuit, driver switch frequency Rate, shutdown pulsewidth, LED light emission luminance will change therewith.
(3-2): group's light modulation: terminals JTG and between electrical neutral axis JN, after external dimmer voltage, additional resistance RTG changes The temporary steady state time constant of monostable circuit is become, external dimmer voltage variation will change driver and turn off pulsewidth, realize group's tune Light.
3-2:NPN pipe Buck driver (Fig. 6)
LED drive circuit operating mode and (Fig. 5) are essentially identical, and switching tube QI is NPN triode.
Triode QD and QTD forms monostable flipflop, is triggered by current detecting grade DI and enters temporary stable state, driver control Circuit work power is derived from DH2, DH1 series voltage.
The temperature control voltage that input by (RWT) of DI control pole tension, and the voltage-stabiliser tube (DW) for passing through (RW) current limliting, RI1 in parallel, RI2 branch pressure voltage determines, is LED current setting value, (RWT), (RW) are derived from DH2, DH1 series voltage.The not super setting of LED current DI is connected cathode and exports low level when value, is lower than QD base stage trigger threshold voltage-stabiliser tube DWM Zener voltage, QD cut-off.
Triode QTD is led by control auxiliary shutdown triode QGD, control switch pipe QI working condition, QTD by RT driving Logical, QGD base voltage is resistance RQ and RJH branch pressure voltage, is lower than its emitter voltage, QGD shutdown, and RQI drives QI conducting.
LED current rises through inductance LBK, when DI anode current sampling resistor RI voltage rises to setting value, DI shutdown, cathode Current potential rises, and triggers monostable circuit through voltage-stabiliser tube DWM, QD is connected collector voltage decline, couples through CT, QTD is obtained because of base stage It being turned off to negative pressure, resistance RQ, RJH branch pressure voltage rises, auxiliary shutdown triode QGD conducting, short switch pipe QI base emitter-base bandgap grading, And DH2, DH1 voltage, QI shutdown are kept, sustained diode X discharges inductive energy storage through LED light DH3~DHN.
Feedback resistance RF makes circuit be maintained at the temporary stable state of QD conducting, QTD cut-off, and resistance RT is that timing capacitor CT is charged to Triode QTD conducting, RF feedback voltage disappearance QD shutdown, temporarily steady process, that is, driver LED current shutdown pulsewidth terminates circuit, Auxiliary shutdown triode QGD cut-off, power switch tube QI restore on state.
Two: gas discharge lamp drive (Fig. 7~8)
Driver, that is, electric ballast is high frequency conversion circuit independent utility, and circuit presses national standard new demand, in (Fig. 1) height Multi-protective function is added in frequency translation circuit, to adapt to gas-discharge lamp work requirements.
1: single tube Amplitude Modulation High Frequency resonant mode gas discharge lamp drive (Fig. 7)
(1): high frequency conversion circuit power pipe drive lacking protects circuit；
Pliotron QP works in Sofe Switch state, is the efficient key of power conversion, driving circuit stopping vibration The method swung is detached from the protection circuit of Sofe Switch state provided with triode, prevents triode because of drive lacking, and power consumption increases and burns It ruins.
Start-up resistor RQ1, RQ2 series connection dividing point voltage, for the power frequency full-wave rectification sinuous pulsation positive voltage wink through decaying Duration with timing capacitor CT negative pressure level and is superimposed the vector sum of charge and discharge sawtooth wave negative voltage instantaneous value.
It in capacitor CT negative pressure peak, selects RQ1, RQ2 ratio that its midpoint branch pressure voltage is made to be about zero potential, connects SCR Anode and control electrode drive resistance RK, then in normal operating conditions, SCR does not have turn-on condition.
When triode QP drives deficiency, disengaging Sofe Switch working condition, resonant tank high-frequency oscillation voltage amplitude will be less than Transient power frequency parameter, feedback voltage are that timing capacitor CT charging negative pressure reduces therewith, start-up resistor RQ1, RQ2 series connection point voltage Positive value, driving resistance RK triggering SCR conducting are risen to, start-up resistor RQ1 is shorted to ground, and triode QP loses starting current and cuts Only.
(2): higher-order of oscillation amplitude controlling；
In lamp un-activation, circuit is unloaded, and triode QP is in weight overdrive condition, and resonant tank amplitude increases severely, high frequency vibrating Swinging amplitude will be greater than transient power frequency parameter, circuit parallel vacuum between triode QP collector isolating diode DC anode and ground Limiter diode DCX, by higher-order of oscillation negative half period superpressure amplitude energy feedback power, oscillation amplitude will follow power-frequency voltage instantaneous Value variation, while higher-order of oscillation negative half period summit slicing, into nonlinear transformation state, wave distortion, oscillation spectrum is broadened, out Existing higher hamonic wave.
(3): gas-discharge lamp starting and activation；
1,2 feet of terminals P1, P2 are separately connected gas-discharge lamp both ends filament.
Translation circuit is unloaded when lamp un-activation, ballast reactive inductor LH, the start-up capacitance CQ group bunchiness in parallel with lamp both ends Join resonant tank, series resonance is in the higher hamonic wave of resonant tank LP and the unloaded characteristic frequency in parallel of CP, high quality factor string Connection resonant tank higher harmonic resonance high pressure is superimposed star t-up discharge lamp with fundamental wave, lamp activate equivalent resistance make series resonance quality because Number decline, while QP enters linear critical driving condition, higher hamonic wave disappears.
Start-up course series resonant circuit only generates short circuit phenomenon in order harmonic frequencies point, and fundamental wave load is still in design model In enclosing, due to ballast inductance LH metering function, even if starting is failed, circuit still can long-term stable operation.
(4): lamp ageing management protects circuit；
By new national standard GB19510.4 (17.1 sections) " document 9 " standard requirements, translation circuit is arranged lamp ageing management and controls electricity Road.
It is grounded with the concatenated high-frequency ballast reactance LH vice-side winding one end of lamp through current-limiting resistance RXL, another termination detects door Voltage-stabiliser tube DLM anode is limited, normal condition LH vice-side winding Amplitude Modulation High Frequency voltage envelope peak value is greater than voltage-stabiliser tube DLM Zener voltage, The positive and negative half cycle of high frequency voltage, voltage-stabiliser tube DLM are both turned on, but negative half period voltage has been attenuated DLM zener voltage.
High frequency voltage positive half cycle is by pullup resistor RLZ series limiting resistor RXL, to protection controllable silicon SCR control electrode electricity Hold CK charging, negative half period voltage is only concatenated by the diode DLF in parallel with resistance RLZ resistance RXL and fills to capacitor CK Electricity, though since charging voltage positive half cycle is greater than negative half period, resistance RLZ is much larger than RXL, and negative pressure charge constant is much smaller than just Charge constant is pressed, lamp normal condition protection controllable silicon SCR control electrode capacitance CK is charged as negative pressure and turns off.
When causing load resistance to increase because of lamp aging, ballast reactance LH voltage declines, vice-side winding high frequency voltage envelope Peak value is less than detection threshold voltage-stabiliser tube DLM Zener voltage, and high frequency voltage positive half cycle voltage-stabiliser tube DLM is still connected, negative half period voltage quilt It blocks, SCR is connected due to controlling electrode capacitance CK and only being charged and trigger by high frequency voltage positive half cycle, and power conversion circuit stops working.
SCR control pole diode DK is to cut-off negative pressure clipping, and capacitor CK is for eliminating power-frequency voltage zero point.
2: two-tube Amplitude Modulation High Frequency resonant mode translation circuit (Fig. 8)
To adapt to high-power applications, push-pull circuit is symmetrically connected as using double-triode valve, operating mode and single tube power become Commutation is same, to keep driving current symmetrical, feedback voltage phase shift inductance LY be serially connected with timing capacitor CT and resonance transformer feedback around Class mid point.
Two-tube power conversion circuit advantage；
Because two triodes are in higher-order of oscillation positive-negative half-cycle, using identical collector current as high frequency transformer primary side two symmetrically around Energy storage can reduce resonant tank quality factor, energy storage electric current compared with identical output power single tube power translation circuit to group respectively Reduce, triode power consumption mitigates, and circuit can be transferred to quasi-resonance state, i.e., triode is in Sofe Switch work status, output voltage Waveform is approximately symmetrical flattened Gaussian beam.
Translation circuit output end PH1, PH2 are for driving gas-discharge lamp in figure.
High frequency transformer TP adds vice-side winding, and circuit is suitable for isolated LED driver, and can realize LED light string Single dead lamp protection.
Specific embodiment bibliography
" document 9 " China's electric lighting the 8th phase page 33 in 2009
The certification of electronic ballast for fluoresent lamp and detection Cha Yuedan.

Claims (8)

1. lamp driving power comprising:
High frequency conversion circuit: power frequency ac voltage is transformed to amplitude modulation high frequency voltage:
LED drive circuit: for driving LED light, control LED load current amplitude:
It is characterized by: the high frequency conversion circuit: the amplitude modulation high frequency voltage of output is the work electricity of isolated LED drive circuit Source, the LED drive circuit supply voltage are that the industrial frequency AC without smothing filtering rectifies output ripple voltage, physical circuit Are as follows:
The isolated simulation pressure regulation LED driver of PNP pipe:
Wherein high frequency conversion circuit: rectifier bridge DZ DC output end parallel connection high-frequency filter capacitor CL, rectifier bridge DZ negative output termination Ground, rectifier bridge DZ export full-wave rectification power frequency sinuous pulsation DC voltage, are high frequency conversion circuit power voltage；
High frequency transformer TP primary side is in parallel with resonant capacitance CP, forms the resonant load of triode QP collector, the one end capacitor CP Rectifier bridge DZ positive output end is connected, the capacitor CP other end connects collector isolating diode DC anode, the connection of diode DC cathode Triode QP collector, the both ends diode DC parallel resistance RC, triode QP emitter ground connection；
Rectifier bridge DZ positive output end connects start-up resistor RQ, and the resistance RQ other end connects transformer secondary feedback winding and timing electricity Hold the tie point of CT, capacitor CT other end ground connection, the transformer TP feedback winding other end connects feedback voltage phase shift inductance LY, electricity Feel the LY other end and connect base stage isolating diode DF anode, inductance LY is lagged and broadened triode QP base drive voltage, two poles Pipe DF cathode and diode DB cathode connected to the transistor QP base stage, diode DB plus earth, diode DF is for being isolated high frequency Feedback voltage negative half period voltage；
Diode DF both ends parallel connection timing resistor RT, resistance RT are that capacitor CT is connected in triode QP base stage by diode DB The negative voltage discharge that period generates, and cut-off negative voltage is provided for triode QP base stage, diode DB limits triode QP base stage End negative pressure amplitude, timing capacitor CT, timing resistor RT and the time constant of start-up resistor RQ are equal to the higher-order of oscillation period；
Diode DC anode connects Bake clamp diode DBK cathode, and diode DF anode connects diode DBK anode, two poles Negative voltage of the triode QP overdrive condition higher-order of oscillation negative half period amplitude lower than ground potential, blocking base drive shape is isolated in pipe DC State triode QP collector current, Bake clamp diode DBK limit triode QP ideal base drive current, diode DC and two poles Pipe DBK makes triode QP work in critical driving condition, and prevents triode QP collection, penetrates knot overvoltage；
Wherein LED drive circuit: physical circuit are as follows:
High frequency transformer TP vice-side winding connects rectifier bridge DZG ac input end, rectifier bridge DZG output end shunt capacitance CLG, electricity The appearance both ends CLG are power frequency sinuous pulsation DC voltage；
Rectifier bridge DZG positive output end connects terminals PH, and LED load lamp string, terminals are connected between terminals PH and terminals IH IH connection LED load current regulation triode QI emitter and start-up resistor RDQ, triode QI collector connect LED light DH2 sun Pole and the resistance RDQ other end, LED light DH2 cathode connect LED light DH1 anode, and LED light DH1 cathode connects load current sampling electricity RI is hindered, the resistance RI other end connects rectifier bridge DZG negative output terminal；
Voltage-stabiliser tube DW cathode connects resistance RW, and the resistance RW other end connects LED light DH2 anode, and voltage-stabiliser tube DW cathode connects resistance RI1, the resistance RI1 other end connect current detecting grade DI control electrode and resistance RI2, the resistance RI2 other end and voltage-stabiliser tube DW anode Rectifier bridge DZG negative output terminal is connected, voltage-stabiliser tube DW voltage is current detecting grade DI control through resistance RI1 and resistance RI2 branch pressure voltage Pole tension processed, i.e. driver LED load current setting value；
Current detecting grade DI control electrode connects resistance RWT, and the resistance RWT other end connects LED light DH2 anode, resistance RWT detection LED light DH2 and LED light DH1 series voltage drop change load current set values according to LED light DH2 and LED light DH1 temperature；
Series resistance RJH between current detecting grade DI cathode and triode QI base stage, current detecting grade DI anode connect LED light DH1 Cathode and resistance RI tie point, resistance RI voltage are load current sense value, current detecting when being greater than load current set values Grade DI will reduce triode QI ideal base drive current, current detecting grade DI cathode and rectifier bridge DZG negative output terminal by resistance RJH Overvoltage protection voltage-stabiliser tube DBH in parallel.
2. lamp driving power described in accordance with the claim 1:
It is characterized by: the LED drive circuit LED load current regulation triode is controlled by integrated circuit double operational:
Physical circuit are as follows: NPN pipe LM158 simulates pressure regulation LED driver:
Rectifier bridge DZ negative output terminal ground connection, positive output end connect terminals PH, connect LED load between terminals PH and terminals IH Lamp string, terminals IH connection LED light DH4 anode, LED light DH4 cathode connect LED load current regulation pipe triode QI current collection Pole, triode QI emitter connect LED light DH3 anode, and LED light DH3 cathode connects LED light DH2 anode, and LED light DH2 cathode connects LED light DH1 anode is connect, LED light DH1 cathode connects LED load current sampling resistor RI, resistance RI other end ground connection；
Rectifier bridge DZ exports full-wave rectification power frequency sinuous pulsation DC voltage, LED light DH3, LED light DH2, LED light DH1 series electrical Pressure is integrated circuit double operational LM158, the i.e. supply voltage of amplifier UIA and amplifier UIB；
Constant current resistance RHL connection LED light DH4 anode, resistance RHL other end connecting triode QHL emitter, triode QHL base Pole connects LED light DH4 cathode, triode QHL collector connecting triode QI base stage, and start-up resistor RQ is connected in parallel on triode QI Between collection, emitter-base bandgap grading, LED light DH4, resistance RHL, triode QHL form triode QI base drive constant-current source；
Resistance RJH is connected between triode QI base stage and current detecting grade UIA output end, and resistance RJH passes through current detecting grade UIA Triode QI ideal base drive current is shunted, LED load current amplitude is controlled；
Voltage-stabiliser tube DW plus earth, voltage-stabiliser tube DW cathode connect resistance RW, and the resistance RW other end connects LED light DH3 anode, electric current Grade UIA non-inverting input terminal connection voltage-stabiliser tube DW cathode and resistance RI1 are detected, the resistance RI1 other end connects resistance RI2 and electric current is examined Grade UIA inverting input terminal is surveyed, the resistance RI2 other end connects LED light DH1 cathode, and voltage-stabiliser tube DW voltage is by resistance RI1 and resistance RI2 partial pressure is current detecting grade UIA inverting input terminal voltage, i.e. LED driver LED load current setting value；
The one end resistance RLW connects LED light DH3 anode, and the resistance RLW other end connects capacitor CLW and amplifier UIB non-inverting input terminal, Capacitor CLW other end ground connection, the end capacitor CLW voltage are LED light DH3, LED light DH2 and LED light DH1 series voltage and resistance RI The sum of voltage follows LED load diode temperature to change:
It is voltage follower that amplifier UIB inverting input terminal, which connects output end, then amplifier UIB output voltage is amplifier UIB with mutually defeated Enter and hold voltage, is i.e. the end capacitor CLW voltage, amplifier UIB output end connects resistance RWT, another termination current detecting grade of resistance RWT UIA inverting input terminal, driver LED load current setting value will follow LED load temperature to change.
3. lamp driving power described in accordance with the claim 1:
It is characterized by: sinusoidal voltage peak value is inputted in industrial frequency AC, to the Amplitude Modulation High Frequency electricity of the high frequency conversion circuit output Clipping is pressed, the LED drive circuit controls LED load current amplitude, physical circuit by the shunt circuit in parallel with load are as follows:
Isolation type high frequency capacitance decompression TL431 parallel shunt driver:
Wherein high frequency conversion circuit: rectifier bridge DZ output end shunt capacitance CL, capacitor CL is to High frequency filter, rectifier bridge DZ negative output End ground connection, rectifier bridge DZ positive output end connect diode DVM anode, and diode DVM cathode connects capacitor CVM and start-up resistor The discharge time constant of RQ, capacitor CVM other end ground connection, capacitor CVM and start-up resistor RQ are greater than power frequency period, the end capacitor CVM Voltage follow power frequency input voltage peak change；
High frequency transformer TP pair side is added clipping winding one end and is grounded, clipping winding other end connection diode DXF anode, and two Pole pipe DXF cathode connects diode DVM cathode, and when high-frequency oscillation voltage amplitude is greater than power-frequency voltage peak value, diode DXF is led It is logical, by higher-order of oscillation superpressure energy feedback power, limit power frequency peak high-frequency voltage amplitude；
Wherein shunt circuit: high frequency transformer TP pair side exports winding one end and connects step-down capacitor CH, the output of transformer TP pair side The winding other end and the capacitor CH other end are separately connected two ac input end of rectifier bridge DZG, rectifier bridge DZG output end and capacitor CLG is in parallel, and rectifier bridge DZG positive output end connects terminals PH, and LED load lamp string is connected between terminals PH and terminals IH, is connect Line end IH connection LED light DH2 anode, LED light DH2 cathode connect LED light DH1 anode, and LED light DH1 cathode connects LED load electricity Sampling resistor RI is flowed, the resistance RI other end connects rectifier bridge DZG negative output terminal；
Voltage-stabiliser tube DW is in parallel with capacitor CW, and voltage-stabiliser tube DW anode connects rectifier bridge DZG negative output terminal, voltage-stabiliser tube DW cathode connection electricity RW and thermistor RRM is hindered, the resistance RW other end connects LED light DH2 anode, and the thermistor RRM other end connects resistance RI1, The resistance RI1 other end connect current detecting grade DI control electrode, resistance RI2 connection LED light DH1 cathode with resistance RI2；
Current detecting grade DI cathode connects resistance RJH, and the resistance RJH other end connects rectifier bridge DZG positive output end and terminals PH, Current detecting grade DI anode connection rectifier bridge DZG negative output terminal, current detecting grade DI cathode series resistance RJH, simultaneously with LED load Connection is shunted because AC-input voltage rises, the LED load electric current that amplitude transfinites.
4. lamp driving power described in accordance with the claim 1:
It is characterized by: the LED drive circuit controls LED load current amplitude by the shunt circuit in parallel with load, shunt Circuit uses NPN triode, physical circuit are as follows:
NPN pipe loads parallel shunt driver:
Rectifier bridge DZ AC-input voltage is depressured through reactance between terminal Z1 and terminal Z2, and rectifier bridge DZ output end and capacitor CL are simultaneously Connection, rectifier bridge DZ negative output terminal ground connection, rectifier bridge DZ positive output end connect terminals PH, connect between terminals PH and terminals JH LED load lamp string, terminals JH connection LED light DH2 anode, LED light DH2 cathode connect LED light DH1 anode, LED light DH1 yin Pole, current detecting grade DI anode connect LED load current sampling resistor RI, resistance RI other end ground connection；
LED light DH2 anode connects current-limiting resistance RW, and the resistance RW other end connects voltage-stabiliser tube DW cathode and resistance RI1, resistance RI1 The other end connect current detecting grade DI control electrode, the resistance RI2 other end and voltage-stabiliser tube DW plus earth with resistance RI2 jointly；
LED light DH2 anode connects resistance RWT, and the resistance RWT other end connects current detecting grade DI control electrode；
Current detecting grade DI cathode connects resistance RDI and LED light DQM anode, and the resistance RDI other end connects LED light DH2 anode, The connection of LED light DQM cathode shunts triode QI base stage, and triode QI base stage connects resistance RB, resistance RB other end ground connection；
Rectifier bridge DZ positive output end connects resistance RJH, resistance RJH other end connecting triode QI collector, triode QI transmitting Pole series connection sampling resistor RI ground connection.
5. lamp driving power described in accordance with the claim 1:
It is characterized by: the LED drive circuit is DC-DC step-down conversion circuit, three-plase half wave rectifier circuit is used to export Pulsating dc voltage be supply voltage, physical circuit are as follows:
Three-phase alternating voltage inputs PNP pipe Buck driver:
First group of three-plase half wave rectifier circuit rectifier diode (DA1, DB1, DC1) common cathode positive output end and Alternating Current Power Supply transformation Shunt capacitance CL between device neutral conductor JN, capacitor CL are used for High frequency filter, and capacitor CL both end voltage is Buck drive electric source voltage；
Buck driver PNP switching transistor QI emitter connects rectifier diode DC1 cathode, triode QI collector connection electricity Feel LBK, the inductance LBK other end connects terminals PH, and LED load lamp string, terminals IH are connected between terminals PH and terminals IH LED light DH2 anode is connected, LED light DH2 cathode connects LED light DH1 anode, and LED light DH1 cathode connects LED load current sample Resistance RI, the resistance RI other end connect to neutral JN；
Triode QI collector connects diode DX cathode, and terminals PH connection capacitor CH, diode DX anode and capacitor CH is another One end connects LED light DH1 cathode；
LED light DH2 anode connects diode DGV anode, and diode DGV cathode connects capacitor CGV, the connection of the capacitor CGV other end Neutral conductor JN, capacitor CGV end voltage are the supply voltage of Buck driver control circuit；
Temperature controlled stage DV cathode connects resistance RDV and resistance RV1, and the resistance RV1 other end is connect with resistance RV2 and resistance RWT Temperature controlled stage DV control electrode, resistance RDV connect diode DGV cathode, the resistance RV2 other end and temperature with the resistance RWT other end It spends controlled stage DV anode and connects neutral conductor JN；
Current detecting pole DI control electrode connects resistance RI1 and resistance RI2, and the resistance RI1 other end connects temperature controlled stage DV cathode, The resistance RI2 other end connects LED light DH1 cathode, and current detecting pole DI anode connects neutral conductor JN；
Current detecting pole DI cathode connects resistance RDI, timing capacitor CT, diode DQF cathode and triode QF collector, resistance The RDI other end connects diode DGV cathode, and the timing capacitor CT other end connects diode DBG anode, and diode DQF anode connects Diode DQ anode is connect, triode QF emitter connects neutral conductor JN；
Triode QTD base stage connects diode DBG cathode and diode DQ cathode, and diode DQ anode connects start-up resistor RQ, The resistance RQ other end connects rectifier diode DC1 cathode, and diode DBG anode connects timing resistor RT, and timing resistor RT is another End connection diode DGV cathode；
Triode QTD collector connecting triode QF base stage and resistance RTD, resistance RTD other end connecting triode QI base stage, three Pole pipe QI base stage connects resistance RJZ, and the resistance RJZ other end connects rectifier diode DC1 cathode, the connection of triode QTD emitter Neutral conductor JN；
Terminals JTG and neutral conductor JN parallel filtering capacitor CLG, terminals JTG connection resistance RTG, the connection of the resistance RTG other end Diode DBG anode, resistance RTG are external pulse-width regulated resistance, are external LED load electricity between terminals JTG and neutral conductor JN Flow pulse-width controlled voltage input end；
Second group of three-plase half wave rectifier circuit rectifier diode (DA2, DB2, DC2) common-anode negative output terminal connects terminals PV2, Voltage is the supply voltage of LED driver B between terminals PV2 and neutral conductor terminals PN2.
6. lamp driving power described in accordance with the claim 1:
It is characterized by: the LED drive circuit is DC-DC step-down conversion circuit, single-phase full-wave rectifer circuit is used to export Sinuous pulsation DC voltage be supply voltage, DC-DC step-down conversion circuit switching tube use NPN triode, physical circuit are as follows:
NPN pipe Buck driver:
Rectifier bridge DZ DC output end shunt capacitance CL, rectifier bridge DZ negative output terminal ground connection, rectifier bridge DZ positive output end connection electricity Feel LBK, the inductance LBK other end connects terminals PH, and LED load lamp string, terminals JH are connected between terminals PH and terminals JH LED light DH3 anode is connected, LED light DH3 cathode connects Buck driver NPN switching transistor QI collector, triode QI and three The emitter of pole pipe QGD connects LED light DH2 anode, and LED light DH2 cathode connects LED light DH1 anode, and it is negative that DH1 cathode connects LED Carry current sampling resistor RI, resistance RI other end ground connection；
Rectifier bridge DZ positive output end connects diode DX cathode, terminals PH connection capacitor CH, diode DX anode and capacitor CH The other end connects LED light DH3 cathode；
LED light DH3 anode connection resistance RQI and resistance RQ, resistance RQI other end connecting triode QI base stage, resistance RQ are another Hold connecting triode QGD base stage, triode QGD collector connecting triode QI base stage；
Current detecting grade DI cathode connects resistance RDI, and the resistance RDI other end, resistance RW, resistance RWT connect LED light DH2 jointly Anode, the resistance RW other end connect voltage-stabiliser tube DW cathode, and the resistance RWT other end connects DI control electrode；
Voltage-stabiliser tube DW cathode connects resistance RI1, and the resistance RI1 other end connect current detecting grade DI control electrode with resistance RI2 jointly, Current detecting grade DI anode connects LED light DH1 cathode, the other end of resistance RI2 and voltage-stabiliser tube DW plus earth；
Current detecting grade DI cathode connects voltage-stabiliser tube DWM cathode, voltage-stabiliser tube DWM anode connecting triode QD base stage, triode QD Collector connects resistance RDC, and the resistance RDC other end connects LED light DH2 anode, triode QD emitter ground connection；
Triode QD collector connects timing capacitor CT, the capacitor CT other end and timing resistor RT connecting triode QTD base stage, electricity It hinders the RT other end and connects LED light DH2 anode；
Triode QTD collector connects resistance RJH and resistance RF, resistance RJH other end connecting triode QGD base stage, resistance RF Other end connecting triode QD base stage, triode QTD emitter ground connection.
7. lamp driving power described in accordance with the claim 1:
It is characterized by: the high frequency conversion circuit, output amplitude modulation high frequency voltage is for driving gas-discharge lamp, physical circuit Are as follows:
Single tube Amplitude Modulation High Frequency resonant mode gas discharge lamp drive:
Rectifier bridge DZ output end shunt capacitance CL, rectifier bridge DZ negative output terminal ground connection, rectifier bridge DZ positive output end connect high frequency and become Depressor TP primary side centre tap, transformer TP primary side and capacitor CP compose in parallel resonant tank, and the one end capacitor CP connects terminals P1-1 and diode DCX cathode, diode DCX plus earth, the capacitor CP other end connect inductance LH, the connection of the inductance LH other end Terminals P2-2, terminals P1-1, terminals P1-2 respectively connect fluorescent lamp both ends filament with terminals P2-1, terminals P2-2, Terminals P1-2 and terminals P2-1 are separately connected the one end start-up capacitance CQ；
Start-up resistor RQ1 connect controllable silicon SCR anode with start-up resistor RQ2 jointly, and the start-up resistor RQ1 other end connects rectifier bridge DZ positive output end, the start-up resistor RQ2 other end connect timing capacitor CT and transformer secondary feedback winding tie point, timing capacitor CT other end ground connection；
Resistance RK is connected in parallel between controllable silicon SCR anode and controllable silicon SCR control electrode, controllable silicon SCR minus earth；
Inductance LH vice-side winding one end series resistance RXL ground connection, the inductance LH vice-side winding other end connect voltage-stabiliser tube DLM anode, Voltage-stabiliser tube DLM cathode connects diode DLF cathode, and diode DLF is in parallel with resistance RLZ, and diode DLF anode connects diode DK cathode, diode DK is in parallel with capacitor CK, diode DK plus earth, and diode DK cathode connects controllable silicon SCR control electrode, Capacitor CK is for eliminating power-frequency voltage zero point.
8. lamp driving power described in accordance with the claim 1:
It is characterized by: the high frequency conversion circuit, using two-tube push-pull circuit, physical circuit are as follows:
Two-tube Amplitude Modulation High Frequency resonant mode translation circuit:
Rectifier bridge DZ output end shunt capacitance CL, rectifier bridge DZ negative output terminal ground connection, rectifier bridge DZ positive output end connect high frequency and become Depressor TP primary side winding centre tap, transformer TP primary side both ends are separately connected capacitor CP, diode DC1 and diode DC2 sun Pole, diode DC1 and diode DC2 cathode are separately connected the collector of triode QP1 and triode QP2, triode QP1 and three The emitter of pole pipe QP2 is grounded；
Diode DC1 and diode DC2 anode are separately connected diode DCX1 and diode DCX2 cathode, diode DCX1 and two Pole pipe DCX2 plus earth；
The one end start-up resistor RQ2 connects feedback voltage phase shift inductance LY and timing capacitor CT, and feedback voltage phase shift inductance LY is another End connection transformer TP secondary side feedback winding centre tap, timing capacitor CT other end ground connection.
CN201610379407.9A 2016-05-28 2016-05-28 Lamp driving power Expired - Fee Related CN106102206B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610379407.9A CN106102206B (en) 2016-05-28 2016-05-28 Lamp driving power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610379407.9A CN106102206B (en) 2016-05-28 2016-05-28 Lamp driving power

Publications (2)

Publication Number Publication Date
CN106102206A CN106102206A (en) 2016-11-09
CN106102206B true CN106102206B (en) 2019-06-28

Family

ID=57229770

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610379407.9A Expired - Fee Related CN106102206B (en) 2016-05-28 2016-05-28 Lamp driving power

Country Status (1)

Country Link
CN (1) CN106102206B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106658861B (en) * 2017-01-10 2018-04-24 中山市新邦照明电器有限公司 One kind illumination induction alarm lamp
CN107333354B (en) * 2017-07-07 2020-07-10 厦门普为光电科技有限公司 L ED lamp tube with voltage boosting circuit
CN107742827A (en) * 2017-11-23 2018-02-27 青岛可健可康负离子技术有限公司 A kind of negative ion generating circuit
CN108366463A (en) * 2018-04-20 2018-08-03 广州赛比思科技有限公司 A kind of LED light power-supply controller of electric with intelligent protection function
CN108988820B (en) * 2018-09-30 2023-09-01 北京易用时代科技有限公司 Network information analysis system
CN109787350B (en) * 2019-03-15 2022-03-04 温州大学 Off-peak electricity storage illumination power supply system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201204740Y (en) * 2007-09-28 2009-03-04 李宗凤 Gas discharging lamp electronic ballast
CN101959350A (en) * 2010-10-15 2011-01-26 珠海市绿色照明科技有限公司 Electrolytic capacitor-free LED power source power conversion method and application circuit thereof
CN104202862A (en) * 2014-07-30 2014-12-10 南京航空航天大学 Single-stage type LED drive power supply without electrolytic capacitor
CN104735845A (en) * 2013-12-20 2015-06-24 西安信唯信息科技有限公司 Efficient 60-W LED driving power source
CN204948393U (en) * 2015-04-17 2016-01-06 东莞市盈聚电子有限公司 The LED drive circuit that a kind of stability is high

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9288867B2 (en) * 2012-06-15 2016-03-15 Lightel Technologies, Inc. Linear solid-state lighting with a wide range of input voltage and frequency free of fire and shock hazards
US20160113076A1 (en) * 2014-10-20 2016-04-21 Energy Focus, Inc. Led lamp with dual mode operation
CN204634097U (en) * 2015-04-27 2015-09-09 苏州之卡智能科技有限公司 A kind of remote control touch dual control lighting lamp circuit
CN204795717U (en) * 2015-06-08 2015-11-18 宁波市合坤工业设计有限公司 LED lamp with automatic voltage regulation function

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201204740Y (en) * 2007-09-28 2009-03-04 李宗凤 Gas discharging lamp electronic ballast
CN101959350A (en) * 2010-10-15 2011-01-26 珠海市绿色照明科技有限公司 Electrolytic capacitor-free LED power source power conversion method and application circuit thereof
CN104735845A (en) * 2013-12-20 2015-06-24 西安信唯信息科技有限公司 Efficient 60-W LED driving power source
CN104202862A (en) * 2014-07-30 2014-12-10 南京航空航天大学 Single-stage type LED drive power supply without electrolytic capacitor
CN204948393U (en) * 2015-04-17 2016-01-06 东莞市盈聚电子有限公司 The LED drive circuit that a kind of stability is high

Also Published As

Publication number Publication date
CN106102206A (en) 2016-11-09

Similar Documents

Publication Publication Date Title
CN106102206B (en) Lamp driving power
CN103313472B (en) LED drive circuit with dimming function and lamp
CN102364991B (en) Switching power supply controller for constant current driving of LED by primary side control and method for constant current driving of LED
CN103491682B (en) Linear switching constant-current LED drive circuit for control over peak current
CN201893980U (en) Multipath dimming light-emitting diode drive power supply
CN103917017B (en) A kind of single stage type no electrolytic capacitor AC/DC LED constant current drives power supply
CN201813599U (en) LED (Light-Emitting Diode) dimmer power
CN102215615A (en) Driving circuit for LED (light emitting diode) lamp
CN104822216B (en) Small-power HID lamp driving circuit
CN203219540U (en) Circuit having LED light modulation linear compensation
CN103427656A (en) Staggered parallel flyback LED driving power supply and PFM (pulse width modulation) control circuit thereof
CN102548089A (en) Multi-channel light adjustable light-emitting diode driving power source
CN102014557A (en) LED dimming power supply
CN107046750B (en) Using PWM mode to the LED drive device of lamps and lanterns stepless dimming
CN208300070U (en) The high-power LED drive circuit of constant current is realized based on frequency modulation ballast
CN201667747U (en) High-efficiency LED street lamp drive circuit
CN105792421A (en) Bridgeless LED driving power supply
CN204191007U (en) Led drive device
CN206650893U (en) A kind of Dimmable LED drive circuit of Alternating Current Power Supply
CN102781147B (en) LED (Light-emitting diode) power supply circuit with high power factor
CN110289755B (en) DCM Buck-Flyback PFC converter with high power factor
CN204578835U (en) Efficiently, high-power LED illuminating lamp driver
CN203504839U (en) LED lamp driving power supply adopting primary detection and regulation
CN203775499U (en) LED (light-emitting diode) pulse drive circuit
CN201332531Y (en) DC (direct current) converting circuit

Legal Events

Date Code Title Description
C06 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
CP02 Change in the address of a patent holder
CP02 Change in the address of a patent holder

Address after: 519015 No.302, No.4, Shihua Lane 4, Jiuzhou Avenue, Xiangzhou District, Zhuhai City, Guangdong Province

Patentee after: Li Zongfeng

Address before: 519015 Guangdong city of Zhuhai province Jida 4 Lane 4 Building 302

Patentee before: Li Zongfeng

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

Granted publication date: 20190628