CN106102206A - Lamp is with driving power supply - Google Patents

Abstract

Lamp disclosed by the invention drives power supply, and no electrolytic capacitor, various circuit topology power supplys are sinuous pulsation DC voltage.Comprising: high frequency conversion circuit；For 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 by it, 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 class control model, its control circuit is without another standby independent direct current working power, unrestricted to LED load lamp number, voltage.High frequency conversion circuit can be gas discharge lamp driving power source；It provides the startup high pressure needed for lamp activation, and band power tube overvoltage, drive lacking, the aging defencive function of lamp.

Description

Lamp is with driving power supply

Art

The present invention relates to LED and drive power supply with gas-discharge lamp, it comprises；

1: high frequency conversion circuit 2:LED drive circuit

Background technology

One: the lamp drawback driving power supply to use electrochemical capacitor；

1: use the lamp driving power supply of civil power, because the industrial frequency rectifying electrolytic capacitor filter charging current angle of flow is less than 180 Degree, power factor reduces, and produces higher hamonic wave.

GB, International Electrotechnical Commission IEC prescribed specific equal to power factor index, the U.S.'s " Energy Star " Valuation Standard Requirement；House SSL lamp power factor is more than 0.9 more than 0.7 (5W) business SSL light fixture (containing LED street lamp).

2: electrochemical capacitor life will determine the whole lamp life-span, and the light fixture to built-in drive circuit, because of the work bar of airtight high temperature Part, electrochemical capacitor life will be substantially less that the LED lamp bead life expectancy of 50,000 hours, and light fixture loses the advantage using LED." document 1 "

3: use Active Power Factor Correction Technology, circuit is complicated, cost increase, and electrolytic capacitor filter working condition because of Operating frequency raises and deteriorates, the illumination market that inapplicable demand is huge, is particularly unsuitable for small-power light fixture.

Using passive valley fill circuit, though improve power factor, but really adding electrochemical capacitor quantity.

In sum, drive power supply to cancel electrochemical capacitor, be to improve lamp power factor, reduction higher hamonic wave, prolongation lamp Have service life, simply effective measures, there is now the application of no electrolytic capacitor driving chip.

Two: the shortcoming of high frequency conversion circuit；

Power frequency civil power is converted to different grades of power frequency amplitude modulation high frequency voltage by high frequency conversion circuit, it is provided that bear with LED Carry the alternating current power supply of coupling, for the driving power supply i.e. electric ballast of gas-discharge lamp.

Circuit is the progress of the authorized patent of invention of inventor " a kind of 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 of LC shunt-resonant circuit high-frequency oscillation voltage and transient power frequency parameter.

In audion overdrive condition, resonant tank high-frequency oscillation voltage amplitude will be beyond transient power frequency parameter, three poles Pipe cannot tolerate the high pressure that the power-frequency voltage peak value overlapped high-frequency positive half cycle peak value of vibration occurs.Primary circuit is only with Bake diode Amplitude limit, tackles translation circuit different loads demand, sets up power frequency or high frequency peaks limiter mode, controls high-frequency oscillation voltage and shakes Width.

2: power tube drive lacking is protected；

Higher-order of oscillation amplitude must be slightly larger than supply voltage, at 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 magnetic core is saturated, circuit load increases the weight of, and oscillation amplitude reduces, power Pipe drive lacking, departs from Sofe Switch state, power tube power consumption will be caused excessive and burn, and primary circuit is arranged without drive lacking state protection Execute.

This circuits improvement correspondence " document 2 " 2.3.5.3 hard switching is protected, the saturated protection of 2.3.5.4 choke coil.

3: power tube turns off；

Primary circuit uses high frequency capacitance coupling, utilizes resonance potential rate of change, drives auxiliary to turn off triode ON, short circuit Power tube base, emitter-base bandgap grading switch-off power pipe, audion cut-off bias is provided by emitter diode voltage, and circuit topology needs to simplify.

4: gas-discharge lamp start-up mode；

Primary circuit uses capacitance energy storage level to superpose multiplication of voltage mode with the higher-order of oscillation 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-required, primary circuit deficency body discharging lamp aging detection and protection are arranged Execute.

Three: miscellaneous LED lamp drive circuit；

1: direct current constant current LED lamp drives power supply control chip of a great variety, all chips must in separate configurations, restriction directly Stream low-pressure state work, different chip power supply voltages, driver control circuit power supply cannot 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 chip self overtemperature and turns off, and without LED temperature rise control, and LED temperature rise really determines that it uses Life-span.

Four: cancel the LED driving chip present situation of electrochemical capacitor；

1: low-pressure side filtering drives power supply chip

Chip model TK5401 " document 3 " " document 4 "

(1): by the standard sequence figure of " document 3 " page 121 figure (3-86) TK5401 voltage outputs, input power-frequency voltage rectification After do not use electrochemical capacitor to filter, chip V_{CC and}Power supply and LED current are power frequency trapezoidal wave.

(2): illustrated by " document 3 " page 122 figure (3-88) initiating sequences, chip power V_CCNeed to be after each power frequency zero passage Restart, make control model complicate.

2: high-pressure subsection linear constant current drive circuit

Chip model MAP3012B " document 5 "

Its application is shown in that " document 5 " page 103 Fig. 4-21 AC input current multi-stage constant currents control oscillogram

Page 111 Fig. 4-27 20W high-voltage linear constant-current drive circuits

(1): circuit LED current envelope 100 weeks vision stroboscopics occurs with power-frequency voltage zero passage, light fixture.

(2): chip controls is the most complicated, timesharing drive segment lamp string, lamp bead utilization rate is low.

(3): when input voltage change is beyond 10%, the disadvantage that part lamp bead is dimmed or does not has electric current to pass through occurs.

The non-isolated buck intelligent LED drive circuit of 3: band PFC

Chip model FL7701 " document 6 " Fairchild Semiconductor of U.S. product.

See the ultimate principle of " document 6 " page 227 Fig. 7-7-3 pfc circuits

The work wave of page 228 Fig. 7-7-4 pfc circuits

FL7701 is composed in series buck pwm driver by LED load, current-limiting inductance with power switch pipe.Because power frequency is whole Without smothing filtering after stream, LED current envelope following power frequency all wave rectification sinuous pulsation changes, and power factor is improved.

The following control model of driver applying this chip can be discussed:

(1): driver MOS switch pipe power supply is the power frequency sinuous pulsation DC voltage without smothing filtering, U_CCFor power frequency Pulsation trapezoidal wave, has automatically provided power frequency zero point the most, separately sets zero point computing circuit to controlling function and there is no contribution in chip.

(2): LED current sampling resistor voltage, controling parameter is had been provided for, to the LED electricity that envelope is power frequency sinuous pulsation Stream, in the fluctuation range that input voltage is limited, controls peak point current and i.e. controls the meansigma methods of DC current, and chip is through computing Producing reference voltage, be used for controlling LED current envelope following power frequency sinuous pulsation, control model is the most complicated.

(3): LED current envelope is power frequency sine wave, because crest ratio numerical value is relatively big, make light fixture that 100 weeks visual flicker to occur.

(4): MOS switch pipe is unnecessary the most all to work according on off state, it is only necessary to make LED current at power frequency supply Arriving and set the electric current moment, enter pulsewidth modulation state, switching power loss and electromagnetic interference all will significantly reduce.

(5): the temperature rise that a detection chip oneself power consumption produces, without determining the LED temperature rise control function of lamp life.

4: new departure of light emitting diode constant flow regulation

Device model NSI (50010～45030)

This device uses automatic biasing constant-current transistor actuator to join with LED strip, exchanges 110 volts or 220 volts of application powered Circuit is shown in " document 7 ".Device is pressure less than 50V, electric current less than 30mA, and LED current value can not regulate, without temp. control function.

Background technology list of references

" document 1 " [light source and illumination] the 3rd phase in 2013 page 19

Quality-improving in terms of alminium electrolytic condenser typical failure analysis of cases

Yellow big China 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 design of drive circuit application example]

China Electric Power Publishing House's April 119 in 2015～page 125

5W LED wall lamp driver based on TK5401 designs

Carry out the clear people

" document 4 " [LED illumination drives electricity optimization design]

China Electric Power Publishing House's April 137 in 2015～page 141

The LED constant-current driver of no electrolytic capacitor device

Sha Zhanyou etc.

" document 5 " [EMC Design of LED lamp and application]

Electronic Industry Press in April, 2015 page 102～page 112

High-pressure subsection linear constant current drive circuit

Shanghai Zheng Yuan Electron Technology Co., Ltd is yellow quick super

" document 6 " [LED illumination drives electricity optimization design]

China Electric Power Publishing House's April 225 in 2014～page 229

Non-isolated buck intelligent LED driver with PFC

Sha Zhanyou etc.

" document 7 " [light source and illumination] the 4th phase 11 in 2013～page 12

New departure (Fig. 3～6) of light emitting diode constant flow regulation

Yang Yujie Song Yong soldier Mao Xingwu

Summary of the invention

The present invention need solve problem be:

Using power frequency supply, cancel electrochemical capacitor, rectifier output voltage is without smothing filtering, and all kinds of lamps drive power supply electricity Road topology can work under power frequency or dither direct current supply voltage conditions that envelope is power frequency.

One: high frequency conversion circuit；

Amplitude modulation high frequency electric source with mains isolation is provided, drives gas-discharge lamp, or isolated with LED drive circuit composition Driver.

1: prevent power-frequency voltage peak base overdrive condition, power tube over-voltage breakdown.

2: preventing power tube because of base stage drive lacking, enter linear work district, power consumption increases pipe temperature rise and burns.

3: cancel auxiliary and turn off audion, simplify power tube cut-off method.

4: simplify gas-discharge lamp and activate startup method.

5: gas-discharge lamp aging is set and LED string extinguishes detection protection circuit.

6: according to load and blood pressure lowering impedance property, change high frequency conversion circuit clips mode.

Two: LED lamp drive circuit；

1: simplify driver control circuit and power, it is not necessary to individually separately put power supply.

2: LED number, load voltage, input voltage change, drive circuit topological novariable need to be adapted to.

3: form stanndard unit with universal component, it is each quasi-driver according to control model by its flexible combination.

4: simulation or PWM mode can be used to control and constant LED DC pulse current average.

5: be automatically adjusted its operating current according to LED temperature.

6: eliminate or reduce no electrolytic capacitor filtering power frequency power produce visual flicker.

Technical scheme and beneficial effect

For solving problem described in summary of the invention, the present invention takes following measure；

One: high frequency conversion circuit protection measure；

1: set up resonant tank energy feedback power pattern amplitude limit, 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, i.e. cut off starting current less than transient power frequency parameter, prevent power tube drive lacking.

3: utilize timing capacitor negative pressure, timed resistance to provide cut-off bias for power tube, simplify breaking circuit.

4: gas-discharge lamp activates；Light Condition uses nonlinear transformation, in the higher hamonic wave series resonance of broadening frequency spectrum, Starting gas-discharge lamp, circuit reduction and starting without fundamental series resonance Starting mode is unsuccessfully directed at the drawback of power tube damage.

5: ballast inductance is arranged pays limit winding, when discharge lamp its voltage old and feeble reduces, i.e. short circuit starting current realizes the lamp longevity Protection eventually.

6: product can long-term storage, no electrolytic capacitor electrolyte dry up, the drawback of the reenabiling that need to progressively boost.

7: once make the simulation life-span at outfan open circuit, short circuit, lamp aging and rated load condition respectively with 7 ballast real Testing, be energized 5 seconds intermittently 15 seconds, 20,000 3 thousand fault-free that work stop examination, switch in terms of once by every day, are equivalent to employ 300 years.

Two: LED lamp drive circuit multiple functional, that simplify and be prone to combine is topological；

1: without using special chip, by universal component composition function unit, it is combined as simulation according to control model, switchs and drive Galvanic electricity road.

2: utilizing LED forward C-V characteristic, several LED strip connection voltages are as control circuit power supply, all types of drivings electricity Road method of supplying power to is identical, changes LED load voltage, and standardized drive circuit topology is unchanged.

3: detection LED forward voltage drop, in order to judge lamp bead temperature rise, it is automatically adjusted lamp current according to LED temperature.

4: change current setting value, change LED current pulsating waveform, it is possible to decrease current wave crest ratio, reduce light fixture vision and dodge Bright.

5: utilize three-phase alternating voltage commutating DC export natural characteristic, reduce LED current crest ratio, improve power because of Number.

6: available change resistance or change voltage system, it is achieved this level or group's light modulation.

The basic functional units of standard, multiple be prone to the control model of combination, the working power of simplification, terse circuit are opened up Flutter, optimal conversion efficiency, extremely strong adaptability, no electrolytic capacitor, High Power Factor, low harmony wave, the long-life, the most every arrange Executing and greatly simplify LED lamp drive circuit, maximizing reduces driver cost.

Accompanying drawing explanation

The present invention is LED and gas-discharge lamp general driving power supply, without smothing filtering after AC-input voltage rectification, nothing Electrochemical capacitor, all kinds of circuit work powers are sinuous pulsation DC voltage.

Fig. 1 is PNP pipe isolated simulation pressure regulation LED driver；Fig. 2 is that NPN pipe LM158 simulates pressure regulation LED driver；

Fig. 3 is isolation type high frequency capacitance decompression TL431 parallel shunt driver；Fig. 4 is that NPN pipe load parallel shunt drives Device；

Fig. 5 is that three-phase alternating voltage inputs 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, and its constant LED DC pulse current average, with high frequency conversion Electrical combination is isolated driver, and drive circuit works alone and is non-isolated driver.

As follows will explanation as a example by three class control models；

Peak value current limliting simulation pressure-adjustable type driver (Fig. 1～2)

Parallel shunt formula peak value current limiting driver (Fig. 3～4)

PWM constant current and shutoff pulsewidth Buck driver (Fig. 5～6)

Driver high-frequency ac translation circuit is soft for pliotron transformer coupled, single, collector amplitude modulation, resonant mode The high-frequency self-excitation agitator of switch change-over, is transformed to Amplitude Modulation High Frequency voltage by power frequency ac voltage, for LED drive circuit provide every From power supply.

The regulation of all kinds of LED drive circuits, control circuit are all without separately setting low-voltage dc power supply, and it takes from several levels series LED Voltage.LED forward slope is precipitous, and increases with the junction temperature rate of rise, simply enters voltage and can make to be considered voltage stabilizing The LED of power supply normally works, and drive circuit is all unrestricted to LED string quantity, input voltage type, numerical value, can be in direct current, work Frequency exchange, Amplitude Modulation High Frequency input voltage dissimilar, any number work, and circuit topology does not becomes with supply voltage change Dynamic.

Circuit is automatically adjusted driving electric current with LED temperature change, makes LED work at optimal temperature rising state, LED forward voltage Temperature coefficient is negative 2.5～4mv/ DEG C, and relevant to LED material, the LED string that temperature control voltage takes from the reaction actual temperature rise of LED is electric Pressure.Use current limliting, constant current technology, coordinate temp. control function, can at utmost set driving electric current, make full use of LED electric light Transfer capability, makes light source possess optimum efficiency and increase LED life.

LED power frequency sinuous pulsation current envelops makes lamp luminescence visual flicker occur, reduces current setting value, LED current LED current crest ratio be will can be reduced by sinuous pulsation convergence trapezoidal wave, visual flicker and spectral drift reduced.

Accompanying drawing is said respectively as a example by the element circuit of accurate adjustable shunt regulator TL431, operational amplifier LM158 composition Bright.

TL431 negative electrode (3 foot) is outfan, and built-in open collector audion, input reference voltage are 2.5V, anti-phase defeated Enter to hold and suck electric current reach the operational amplifier of 100mA for (1 foot), anode (2 foot) earthing potential, negative electrode." document 7 "

1: peak value current limliting simulation pressure-adjustable type driver (Fig. 1～2)

Circuit is the current stabilization circuit of operational amplifier belt current regulation audion, to change the audion etc. with load in series Effect resistance mode limits, constant LED DC current meansigma methods.

TL431 direct current input analog regulation constant-current circuit shown in " document 7 " is succinct, but because adjustment state power consumption is big, and Need to be worked alone power supply.Pulsating dc voltage power feed driver, control circuit with LED load voltage as working power, though at mould Intend pressure regulation operation, but regulatory region is controlled, when power frequency half-wave in width, when regulatory region ratio reduces, then regulates voltage magnitude Little, audion is low in energy consumption, and regulation process without electromagnetic interference, circuit input end filtering measures can be simplified.

Regulation pliotron is connected with LED, if LED current does not surpasses setting value, then audion is in lossless conducting State.When instantaneous AC input voltage makes LED current surpass setting value, audion internal resistance will be increased, limit LED current, permanent Determining pulsating direct current current average, pliotron is subjected to the power consumption that adjustment state produces.

2: parallel shunt formula peak value current limiting driver (Fig. 3～4)

Series connection simulation reduction regulation, audion will bear and power current current flow angle positive correlation, the power consumption that regulation process causes.

Pulsating dc voltage is powered parallel shunt formula driver, and driver AC-input voltage is through reactance blood pressure lowering, after rectification Directly driving LED, electric current regulation audion series connection consumption reduction resistance is in parallel with LED load, if at instantaneous AC input voltage LED electricity Stream does not transfinites, and audion will be off state, and driver is several lossless.

Entering adjustment state, audion makes LED current turn on when being equal to setting value at instantaneous AC input voltage, regulation State equivalent load resistance reduces, and different from audion internal resistance decompression mode, the voltage that overflows is absorbed by reactance, and audion only divides Stream suction is transfinited portion of electrical current, and it is extremely low that driver enters constant flow regulation state power consumption, less than simulation pressure-adjustable type driver.

3:PWM constant current and shutoff pulsewidth Buck driver (Fig. 5～6)

Aforementioned two quasi-driver power consumptions and power frequency supply angle of current conduction positive correlation, such power consumption of driver and current flow angle not phase Close.

LED drive circuit topology is by element circuit current detecting level, temperature controlled stage, monostable flipflop and power switch Pipe tandem electric inductance composition Buck step-down conversion circuit.Because LED current setting value is constant, power switch tube current pulsewidth is by power frequency electric Pressure instantaneous value modulation, driver is in frequency hopping, the work of Frequency pattern.Turn off pulsewidth true by the temporary steady state time of monostable flipflop Fixed, the input of Amplitude Modulation High Frequency, direct current, power frequency pulsating volage all can work, and is isolated driver with high frequency conversion electrical combination.

(Fig. 5) the input non-isolated driver of three-phase alternating voltage shown in, for eliminating unidirectional current to supply transformer iron core Magnetization, use the circuit topology of the band neutral conductor, common cathode anode half bridge together and supply transformer center line respectively form solely Vertical power supply, respectively two groups identical LED load are powered, and export inferred-zero, the DC voltage of three times of power frequency pulsation.Its advantage is such as Under；

(1): concentration rectification mode can be used, reduce supply lines number, be particularly suited for street lighting.

(2): load current crest factor is decreased to 0.185, a few no visual of light flicker.

(3): three-phase half-bridge power factor is 0.687, it is not necessary to PFC." document 8 "

Two: gas discharge lamp drive (Fig. 7～8)

Gas discharge lamp drive circuitry is the independent high frequency conversion circuit 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)

Demand is started for adapting to gas-discharge lamp, at circuit Light Condition, by higher-order of oscillation negative half period voltage slicing, the most non- Linear transformation characteristic makes higher-order of oscillation video stretching, utilizes higher hamonic wave LC series resonance voltage superposition first-harmonic, for first starter And again activate discharge lamp generation high pressure for power frequency zero crossing.

Driver detection ballast reactance vice-side winding voltage, it is achieved lamp is died of old age protection, and audion overvoltage and deficient is set Drive protection.

Accompanying drawing explanation list of references

" document 7 " [Motorola linear and interface circuit handbook] (volume two)

China Machine Press's in JIUYUE, 1994

(voltage reference) 5-(16～23) page

Motorola Inc. Liu Ren is general waits compiling

" document 8 " [power converter circuit]

Page 68 China Machine Press in October, 2008

Shen is translated through Zhang Zhengnan

Detailed description of the invention

One: LED lamp constant current driver

1: peak value current limliting simulation pressure-adjustable type driver (Fig. 1～2)

1-1:PNP manages isolated simulation pressure regulation LED driver (Fig. 1)

Driver is made up of with LED drive circuit high frequency conversion circuit, is LED load between drive circuit terminals PH, JH Lamp string.

JI1, JI2 power frequency input voltage, rectified bridge DZ rectification, electric capacity CL filter high fdrequency component, export the positive stringy pulse of power frequency Dynamic DC voltage, powers for high frequency conversion circuit.Amplitude Modulation High Frequency voltage is through high frequency transformer TP blood pressure lowering, for LED drive circuit electricity Source.

(1): high frequency conversion circuit start；

Transformator TP primary side winding forms shunt-resonant circuit with electric capacity CP, for audion QP collector load, starts electricity Resistance RQ charges to timing capacitor CT, starts vibration to audion QP conducting.

Transformator TP feedback winding low side is connected with timing capacitor CT, feeds back the high-end feedback voltage of winding shifted after startup Inductance LY, base isolation diode DF, QP base emitter-base bandgap grading, set up negative pressure for CT reverse charging, and charging current pulses i.e. QP base stage is driven Streaming current, audion QP collector current pulse is resonant tank energy storage, to encourage resonant tank to produce vibration.

Audion QP base isolation diode DF anode voltage, for timing capacitor CT direct current negative level, superposition charge and discharge are sawed The vector of the negative voltage of tooth ripple and high frequency feedback sine voltage, it is just only at feedback voltage positive half cycle peak value finite region Value.

After vibration is set up, being zero when high frequency voltage drops to QP collector voltage according to sinusoidal rule, feedback voltage drives QP Conducting, electric capacity CT charges, and when sawtooth waveforms negative pressure of charging is more than feedback voltage instantaneous value, diode DF turns off, and QP drives electric current Disappear, QP collector voltage will rise according to resonance rule, and feedback voltage then declines with identical rule, electric capacity CT negative pressure by with base The timing resistor RT that pole isolating diode DF is in parallel, provides cut-off negative pressure for QP base stage, makes QP colelctor electrode fast at zero-voltage state Speed cut-off.

Start resistance RQ and timing resistor RT, through QP base stage negative pressure limiter diode DB, discharge for electric capacity CT negative pressure, treat CT It is discharged to QP colelctor electrode resonance potential and again drops to zero, through the high frequency feedback voltage transient that feedback voltage phase shift inductance LY is delayed Value, during more than electric capacity CT negative pressure, QP base stage occurs that, by the driving pulse of inductance LY broadening, QP turns in Sofe Switch state again.

(2): high-frequency voltage amplitude controls；

For preventing audion QP from puncturing, translation circuit need to control high-frequency voltage amplitude, makes power frequency crest voltage and high frequency vibrating Swing positive half cycle crest voltage sum, less than QP collection, emitter-base bandgap grading pressure voltage.

Entering 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, producing negative pressure at QP colelctor electrode isolating diode DC anode, DC is blocked, QP current collection Electrode current is zero, and vibration is reduced by ideal base drive current without contribution, resonant tank energy storage.

Bake clamp diode DBK is accessed between base isolation diode DF anode and colelctor electrode isolating diode DC anode, When DC anode occurs that QP ideal base drive current is branched to resonant tank, QP drives electric current control critical by negative pressure, DBK conducting State.

DC with DBK acts on jointly, and circuit will follow transient power frequency parameter volitional check high-frequency voltage amplitude, it is allowed to negative Carry open circuit Light Condition work.The resistance RC in parallel with diode DC is used for removing cut-off state audion QP colelctor electrode remnants electricity Lotus.

(3): LED drive circuit；

Amplitude modulation high-frequency input voltage filters through high-frequency rectification bridge DZG rectification, electric capacity CLG, high frequency voltage is demodulated into power frequency Sinuous pulsation DC voltage, for drive circuit power supply.For the LED string do not drawn between DZG outlet terminal PH, JH.

Stanndard unit circuit TL431 current detecting level DI can be considered voltage comparator or summing amplifier, and homophase is defeated Entering end is built-in 2.5V reference voltage, and inverting input is that TL431 controls pole, and it is electric with the composition electric current regulation of PNP triode QI Road.

Resistance RDQ provides initial for LED and drives electric current, and stabilivolt DBH provides overvoltage protection for DI negative electrode, and DH2, DH1 regard For stabilivolt, its series voltage is control circuit voltage, and circuit is unlimited to the LED load voltage more than DH2, DH1 series voltage System.

Stabilivolt DW current-limiting resistance RW voltage takes from DHI, DH2 series voltage drop, divider resistance RI1, RI2 in parallel with DW Branch pressure voltage, controls pole input voltage for DI, and it determines drive circuit LED current setting value.DI is electric current through cathode resistor RJH Regulation audion QI provides and drives electric current, if input voltage instantaneous value LED current is less than setting value, DI with QI leads in saturation Logical, driver is lossless.

DI anode series connection LED current sampling resistor RI ground connection, RI voltage increase TL431 anode potential, i.e. improve TL431 internal reference voltage, is equivalent to boost amplifier in-phase input end voltage, and when RI voltage is equal to setting value, DI works electricity The i.e. QI of stream drives electric current to reduce, and is in linear work district together, and QI equivalent resistance increases, to limit LED drive current.

Constant current mode fixing from " document 7 " is different, and current setting value is able to programme, and output electric current is expansible.

It is another input voltage of DI end of oppisite phase that LED temperature controls resistance RWT, and it takes from DH1, DH2 series voltage drop, when LED temperature rises, pipe drops, and LED current setting value will reduce, it is achieved temp. control function.

1-2:NPN pipe LM158 simulation pressure regulation LED driver (Fig. 2)

Driver shaping modes is replaced TL431 by double operational LM158, with electric current with (Fig. 1), circuital current detection level UIA Regulation NPN audion QI and constant current thereof promote level QHL composition driver.It it is unillustrated LED string between PH, JH.

DH3, DH2, DH1 series voltage is the working power of UI amplifier LM158, and driver control circuit is joining with LED strip Equivalent load resistance coupling, power frequency any number input voltage, power frequency trapezoidal wave work asynchronously.

Starting resistance RQ after powering on and provide initial driving electric current for QHL, QI is driven conducting by QHL, and QI drives power supply to take from LED DH1～DH4 and audion QI series voltage drop.

Current detecting level UIA outfan, through pull-up resistor RJH, controls QI and drives electric current, drive circuit load equivalent resistance For QI Yu LED internal resistance sum, in regulation duty, increasing with QI internal resistance, DH4 anode voltage i.e. QI driving voltage rises, shape Become control circuit positive feedback loop, constant current triode QHL base, penetrate knot with LED pipe HD4, constant QHL emitter resistance RHL voltage, composition Constant-current source, bears driving voltage change, makes QI drive electric current from QI collection, penetrate voltage variations affect.

UIA inverting input is two voltage sums；One is potentiometer RI1, RI2 partial pressure value concatenation electricity taking from DW voltage Stream sampling resistor RI voltage, it two controls voltage for LED temperature that input resistance is RWT, this two voltage with, defeated with UIA homophase Enter end, stabilivolt DW voltage difference is LED current setting value.

If LED current does not surpasses setting value, UIA exports high level, audion QI saturation conduction.When input voltage instantaneous value makes LED current sampling resistor RI voltage rises, and anti-phase equal with in-phase input end voltage to UIA, audion QI enters linear work District, internal resistance increases, and LED string electric current is maintained at setting value, and driver works in current limliting adjustment state.

DH1～DH3 lamp series voltage is electric capacity CLW charging through resistance RLW, and CLW voltage will change with LED temperature rise, and it is The in-phase input end voltage of LM158 voltage follower UIB, UIB output termination temperature resistance RWT, control LED current setting value, When LED temperature raised voltage declines, and current setting value reduces, driver will be followed LED temperature rise and be changed driving electric current.

2: parallel shunt formula peak value current limiting driver (Fig. 3～4)

Such driver drives circuit needs reactance blood pressure lowering to power, when LED load is shunted by audion, 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 amplitude limit；

(Fig. 3) high frequency conversion circuit is similar with (Fig. 1), and audion QP works in weak overdrive condition, and the higher-order of oscillation only exists Power-frequency voltage peak value amplitude limit, except at clipping state, amplitude modulation high frequency voltage is sinusoidal wave, to adapt to high frequency capacitance blood pressure lowering.

Rectifier bridge DZ output voltage is the charging of peak value holding capacitor CVM through isolating diode DVM, and discharge resistance is high value Starting resistance RQ, CVM voltage will remain in power-frequency voltage peak value.High frequency transformer TP pay margin width winding high frequency voltage amplitude with Transient power frequency parameter is equal, one end ground connection, and the other end connects limiter diode DXF, and DXF cathode voltage is electric capacity CVM work Frequently crest voltage, the most only when high frequency voltage is more than power frequency peak value, DXF conducting, by higher-order of oscillation energy feedback CVM, limits high frequency Oscillatory voltage amplitude.

(2): TL431 parallel shunt drive circuit；

High frequency transformer is paid limit output voltage and is filtered through electric capacity CH blood pressure lowering, high-frequency rectification, electric capacity CLG, and rectifier bridge DZG exports It is power frequency pulsating high frequency DC voltage for power frequency pulsation or envelope, provides insulating power supply for LED drive circuit.

Series connection consumption reduction resistance RJH is in parallel with LED load for TL431 current detecting level DI built-in audion, and drive circuit can be DI negative electrode is more than any number voltage power supply of DH2, DH1 series voltage less than 36V.

Stabilivolt DW current-limiting resistance RW takes from DH2, DH1 series voltage, and its anode is rectifier bridge DZG negative output terminal.

Filter capacitor CW and critesistor RRM, RI1 series resistance, divide with RI2, LED current sampling resistor RI series resistance 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, the straight-through LED load of DZG rectification output, circuit works at loss-free conditions.

When LED current reaches setting value, DZG is exported LED through RJH by the built-in triode ON of DI to transfinite portion of electrical current shunting.

Negative tempperature coefficient thermistor RRM is used for detecting LED temperature rise, and it welds or is adhered on circuit board, works as LED temperature Rising, RRM resistance reduces, and LED current setting value reduces, and driver will be followed LED temperature and is automatically adjusted LED operation electric current.

DI negative electrode series resistor RJH is used for reducing DI power attenuation, limits shunt current value.

2-2:NPN pipe load parallel shunt driver (Fig. 4)

This driver current detection level DI drives outer attached parallel shunt NPN audion QI, to promote load voltage, increases negative Carrying electric current, terminals Z two ends are ac buck reactance.

DI negative electrode is through pull-up resistor RDI, after LED thresholding diode DQM drives QI, DI anode in parallel with QI emitter-base bandgap grading, string Connect current sampling resistor RI ground connection.Because of DI conducting voltage about 2V, between its negative electrode and QI base stage, seal in LED diode DQM.

TL431 current detecting level DI is voltage comparator, power supply take from be considered as Zener stabilivolt LED DH1, DH2 series voltage, between its adaptation PH and JH, LED string number or lamp load voltage arbitrarily change, drive circuit topological novariable.

Quoted from RW current limliting, resitstance voltage divider RI1, RI2 branch pressure voltage of stabilivolt DW voltage, control resistance with by temperature The temperature control voltage of RWT input, determines LED current setting value jointly.

LED current is in setting value, and DI conducting QI turns off, and rectifier bridge output electric current is equal to LED load electric current, when LED electricity Stream transfinites, and DI anode RI voltage is equal to setting value, and DI turns off, and drives QI conducting, and the electric current transfinited turns to audion QI, RI electric current For LED electric current and QI shunt current sum.

QI can reduce LED current setting value at low power consumption switch operation, circuit, and making driving electric current is trapezoidal wave.

3:PWM constant shutoff pulsewidth Buck driver (Fig. 5～6)

Identical with aforementioned circuit, such driver control circuit working power takes from DH2, DH1 series voltage.

3-1: three-phase alternating voltage input PNP pipe Buck driver (Fig. 5)

Three-phase alternating current input voltage is by full-bridge rectification, and two half-bridge outputs and supply transformer center line are respectively Standalone Drives electricity Source.

Circuit is formed temperature controlled stage DV and current detecting level DI by the TL431 being considered operational amplifier, and DV is output as DI provides and controls pole tension, and automatically changes current setting value according to LED temperature, and DI triggers by audion according to LED current value The monostable flipflop of QTD, QF composition, QTD drives PNP switching tube QI, its tandem electric inductance LBK to drive with LED load composition Buck Dynamic device.

(1): functional unit circuit；

Temperature controlled stage DV is typical adjustable shunt regulator, can be considered addition proportional amplifier, outfan TL431 negative electrode Connecting pull-up resistor RDV, feedback resistance RV1, inverting input is that TL431 controls pole；One input resistance RV2 input voltage is Zero potential, another input temperature resistance RWT input voltage take from LED DH2, DH1 series voltage, output voltage is with LED temperature Change.

Current detecting level DI and pull-up resistor RDI, form voltage comparator, and temperature controlled stage DV negative electrode output voltage is through electricity Resistance RI1, RI2 branch pressure voltage, controls pole tension, i.e. LED current setting value for TL431, and its value is less than TL431 reference voltage 2.5V, RI2 concatenate LED current sampling resistor RI ground connection, then RI voltage will determine the duty of drive circuit.

If LED current turns off less than setting value DI, negative electrode output high level, LED current exports low electricity more than setting value DI Flat.

When LED temperature raises, and tube voltage reduces, and the voltage that temperature controlled stage DV inputs through temperature resistance RWT reduces, and DV is defeated Going out i.e. current detecting level DI of voltage and control pole tension rising, driver will be automatically adjusted LED current with LED temperature.

(2): PNP switching tube QI duty；

The startup resistance RQ series diode DQ taking from rectifier output voltage provides base current for driving audion QTD, Jointly turning on the PNP switching tube QI driven through QTD collector resistance RTD, DH2, DH1 series voltage is isolated through diode DGV CGV filters, and sets up power supply for control circuit, and timing resistor RT series connection negative pressure isolating diode DBG separately provide base drive for QTD Electric current.

Drive audion QTD Yu QF form monostable flipflop, QTD base diode DBG anode timed electric capacity CT and Current detecting level DI negative electrode couples, when LED current DI conducting when inductance LBK linear rise is to setting value, DI negative electrode output electricity Pressure reduces rapidly, and diode DBG anode obtains negative pressure, and QTD and switching tube QI turns off, and QF turns on, and clamps DI negative electrode to zero, dimension Holding the shutoff pulsewidth of the temporary stable state of circuit, i.e. LED current, diode DX is LED afterflow through inductance LBK.

QF conducting also sucks startup resistance RQ electric current through diode DQF, exempts RQ and driver turns off pulsewidth impact.

Timing resistor RT is through the extremely electric capacity CT reverse charging of QF current collection, and CT voltage rises to audion QTD conducting, and QF ends, Switching tube QI is again conducted to LED current and rises to setting value, for the electric current pulsewidth of driver.

(3): light-modulating mode；

(3-1): this level dims: change timing resistor RT, monostable circuit temporary steady state time constant, driver switch frequency Rate, shutoff pulsewidth, LED luminosity will change therewith.

(3-2): group dims: between terminals JTG and confession electrical neutral axis JN, after external dimmer voltage, additional resistance RTG changes Having become monostable circuit temporary steady state time constant, the change of external dimmer voltage will change driver and turn off pulsewidth, it is achieved group adjusts Light.

3-2:NPN pipe Buck driver (Fig. 6)

LED drive circuit mode of operation is essentially identical with (Fig. 5), and switching tube QI is NPN audion.

Audion QD Yu QTD forms monostable flipflop, current detecting level DI trigger entering temporary stable state, driver control Circuit work power takes from DH2, DH1 series voltage.

DI controls the temperature control voltage that inputted by (RWT) of pole tension, and the stabilivolt (DW) through (RW) current limliting, RI1 in parallel, RI2 branch pressure voltage determines, for LED current setting value, (RWT), (RW) take from DH2, DH1 series voltage.LED current is not super to be set During value, DI turns on negative electrode output low level, triggers thresholding stabilivolt DWM Zener voltage less than QD base stage, and QD ends.

Audion QTD turns off audion QGD by controlling auxiliary, controls switching tube QI duty, and QTD is driven by RT and leads Logical, QGD base voltage is resistance RQ and RJH branch pressure voltage, and less than its emitter voltage, QGD turns off, and RQI drives QI conducting.

LED current rises through inductance LBK, when DI anode current sampling resistor RI voltage rises to setting value, and DI turns off, negative electrode Current potential rises, and triggers monostable circuit through stabilivolt DWM, and QD conducting collector voltage declines, and couples through CT, and QTD obtains because of base stage Turning off to negative pressure, resistance RQ, RJH branch pressure voltage rises, and auxiliary turns off audion QGD and turns on, short switch pipe QI base emitter-base bandgap grading, And keeping DH2, DH1 voltage, QI turns off, and inductive energy storage is discharged by sustained diode X through LED DH3～DHN.

Feedback resistance RF makes circuit be maintained at QD conducting, the temporary stable state of QTD cut-off, and resistance RT is that timing capacitor CT charges to Audion QTD turns on, and RF feedback voltage disappearance QD turns off, and the circuit steady i.e. driver LED current of process temporarily turns off pulsewidth and terminates, Auxiliary turns off audion QGD cut-off, and power switch pipe QI recovers conducting state.

Two: gas discharge lamp drive (Fig. 7～8)

Driver i.e. electric ballast, for high frequency conversion circuit independent utility, circuit presses GB new demand, high at (Fig. 1) Translation circuit adds multi-protective function frequently, 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 protection circuit；

Pliotron QP works in Sofe Switch state, is the high efficiency key of power conversion, and drive circuit stopping is shaken The method swung, is provided with audion and departs from the protection circuit of Sofe Switch state, prevents audion from increasing because of drive lacking, power consumption and burning Ruin.

Start resistance RQ1, RQ2 series connection dividing point voltage, for the power frequency all wave rectification sinuous pulsation positive voltage wink through decay Duration, with timing capacitor CT negative pressure level the vector that superposes charge and discharge sawtooth waveforms negative voltage instantaneous value.

At electric capacity CT negative pressure peak, selecting RQ1, RQ2 ratio to make its midpoint branch pressure voltage be about zero potential, it connects SCR Anode and control pole drive resistance RK, then in normal operating conditions, SCR does not possess turn-on condition.

When audion QP drives deficiency, departing from Sofe Switch duty, resonant tank high-frequency oscillation voltage amplitude will be less than Transient power frequency parameter, feedback voltage is that timing capacitor CT charging negative pressure reduces therewith, starts resistance RQ1, RQ2 series connection point voltage Rise on the occasion of, drive resistance RK trigger SCR conducting, start resistance RQ1 be shorted to ground, audion QP loses starting current and cuts Only.

(2): higher-order of oscillation amplitude controlling；

When lamp un-activation, circuit is unloaded, and audion QP is in weight overdrive condition, and resonant tank amplitude increases severely, high frequency vibrating Swinging amplitude and will be greater than transient power frequency parameter, circuit is parallel vacuum between audion QP colelctor electrode isolating diode DC anode and ground Limiter diode DCX, by higher-order of oscillation negative half period superpressure amplitude energy feedback power, it is instantaneous that oscillation amplitude will follow power-frequency voltage Value change, higher-order of oscillation negative half period summit slicing simultaneously, enter nonlinear transformation state, wave distortion, oscillation spectrum broadening, go out Existing higher hamonic wave.

(3): gas-discharge lamp starts and activates；

The 1 of terminals P1, P2,2 feet connect gas-discharge lamp two ends filament respectively.

During lamp un-activation, translation circuit is unloaded, ballast reactive inductor LH, the start-up capacitance CQ composition string in parallel with lamp two ends Connection resonant tank, its series resonance is in the higher hamonic wave of resonant tank LP and CP zero load characteristic frequency in parallel, high quality factor string Connection resonant tank higher harmonic resonance high pressure superposes star t-up discharge lamp with first-harmonic, lamp activation equivalent resistance make series resonance quality because of Number declines, and QP enters linear critical driving condition simultaneously, and higher hamonic wave disappears.

Start-up course series resonant circuit only produces short circuit phenomenon at order harmonic frequencies point, and first-harmonic load is still at design model In enclosing, due to ballast inductance LH metering function, even if starting unsuccessful, circuit still can long-term stable operation.

(4): lamp ageing management protection circuit；

By new national standard GB19510.4 (17.1 sections) " document 9 " standard-required, translation circuit arranges lamp ageing management and controls electricity Road.

The high-frequency ballast reactance LH vice-side winding one end connected with lamp is through current-limiting resistance RXL ground connection, and another termination detects door Limit stabilivolt DLM anode, normal condition LH vice-side winding Amplitude Modulation High Frequency voltage envelope peak value is more than stabilivolt DLM Zener voltage, The positive and negative half cycle of high frequency voltage, stabilivolt DLM is both turned on, but negative half period voltage has been attenuated DLM zener voltage.

High-frequency electrical positive pressure half cycle passes through pullup resistor RLZ series limiting resistor RXL, and protection controllable silicon SCR is controlled extremely electricity Holding CK charging, negative half period voltage, by by the diode DLF in parallel with resistance RLZ, is only concatenated resistance RXL and fills electric capacity CK Electricity, though owing to charged electrical positive pressure half cycle is more than negative half period, but resistance RLZ is much larger than RXL, and negative pressure charge constant is much smaller than just Pressure charge constant, lamp normal condition protection controllable silicon SCR controls electrode capacitance CK and is charged as negative pressure and turns off.

When causing load resistance to increase because of lamp aging, ballast reactance LH voltage declines, its vice-side winding high frequency voltage envelope Peak value is less than detection threshold stabilivolt DLM Zener voltage, and high-frequency electrical positive pressure half cycle stabilivolt DLM still turns on, negative half period voltage quilt Blocking, SCR is only turned on by the charging triggering of high-frequency electrical positive pressure half cycle because controlling electrode capacitance CK, and power conversion circuit quits work.

SCR control pole diode DK is to cut-off negative pressure amplitude limit, and electric capacity CK is used for eliminating power-frequency voltage zero point.

2: two-tube Amplitude Modulation High Frequency resonant mode translation circuit (Fig. 8)

For adapting to high-power applications, using double-triode valve symmetry to be connected as push-pull circuit, mode of operation becomes with single tube power Commutation with, for making 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 audions are in higher-order of oscillation positive-negative half-cycle, with identical collector current for high frequency transformer former limit two symmetry around Group energy storage respectively, compared with identical output single tube power translation circuit, it is possible to decrease resonant tank quality factor, energy storage electric current Reducing, audion power consumption alleviates, and circuit can proceed to quasi-resonance state, i.e. audion at Sofe Switch operation, output voltage Waveform is approximately symmetrical flattened Gaussian beam.

In figure, translation circuit outfan PH1, PH2 are used for driving gas-discharge lamp.

High frequency transformer TP sets up vice-side winding, and circuit is i.e. applicable to isolated LED driver, and can realize LED string Single dead lamp protection.

Detailed description of the invention list of references

" document 9 " China electric lighting the 8th phase in 2009 page 33

The pellet that jumps is looked in certification and the detection of electronic ballast for fluoresent lamp.

Claims (8)

1. lamp is with driving power supply, comprising:

Power conversion circuit: power frequency ac voltage is transformed to amplitude modulation high frequency voltage, provides insulating power supply for LED drive circuit, Or be gas discharge lamp driving power source；

LED drive circuit: limit LED peak point current, be used for driving LED；

It is characterized in that:

Described power conversion circuit:

See (Fig. 1) PNP pipe isolated simulation pressure regulation LED driver, high frequency conversion circuit:

Industrial frequency rectifying bridge (DZ) DC output end parallel connection high-frequency filter capacitor (CL), (DZ) negative output terminal ground connection；

(DZ) output all wave rectification power frequency sinuous pulsation DC voltage；

High frequency transformer (TP) former limit is in parallel with electric capacity (CP), and (CP) one end connects (DZ) positive output end, and (CP) other end connects Audion (QP) colelctor electrode isolating diode (DC) anode, (DC) negative electrode connects (QP) colelctor electrode, (DC) two ends parallel resistance (RC), (QP) grounded emitter；

(DZ) positive output end connect start resistance (RQ), (RQ) other end connect timing capacitor (CT) with (TP) pay limit feedback around Group, (CT) other end ground connection, (TP) feedback winding other end connects feedback voltage phase shift inductance (LY), and (LY) other end connects (QP) base isolation diode (DF) anode, (DF), (DB) negative electrode connect (QP) base stage, (DF) two ends parallel connection timing resistor (RT), (DB) plus earth；

(DC) anode is connected with (DBK) anode with Bake clamp diode (DBK) negative electrode, (DF) anode；

(DC) being used for blocking the collector current of audion (QP) overdrive condition, (DBK) is used for controlling (QP) base current, (DC) make (QP) to work at critical driving condition with (DBK), and prevent (QP) to collect, penetrate knot overvoltage；

(CT) warp (RT) is that (QP) base stage provides cut-off back bias voltage, and its time constant is equal to the higher-order of oscillation cycle；

(LY) delayed and broadening (QP) base drive voltage；

Described LED drive circuit:

See (Fig. 1) LED drive circuit:

(TP) pay limit winding and connect high-frequency rectification bridge (DZG) ac input end, (DZG) outfan parallel connection high-frequency filter capacitor (CLG)；

(CLG) two ends are power frequency sinuous pulsation DC voltage；

(DZG) positive output end connects terminals (PH), connects LED string between (PH～JH), and (JH) connecting triode (QI) is launched Pole and (RQD), (QI) colelctor electrode connection LED (DH2) anode and (RQD) other end, (DH2) negative electrode series connection (DH1) anode, (DH1) negative electrode series current sampling resistor (RI), (RI) other end connects (DZG) negative output terminal；

(DH2, DH1) LED strip connection voltage is the control power supply of drive circuit；

Stabilivolt (DW) negative electrode connects current-limiting resistance (RW), and (RW) other end connects (DH2) anode, and (DW) negative electrode connects resistance (RI1), (RI1) other end connects current detecting level (DI) and controls pole and resistance (RI2), and (RI2) other end is with (DW) anode even Connect (ZLG) negative output terminal；

(DI) controlling pole and connect temperature control resistance (RWT), (RWT) other end connects (DH2) anode；

(DI) negative electrode and (QI) base series resistor (RJH), (DI) anode connects (DH1) negative electrode and (RI) junction point；

(DI) negative electrode and (ZLG) negative voltage outfan overvoltage protection in parallel stabilivolt (DBH).

Lamp the most according to claim 1 drives power supply, it is characterized in that；

Described LED drive circuit:

See (Fig. 2) NPN pipe LM158 simulate pressure regulation LED driver:

LED current regulation audion is NPN pipe, and current detecting level (UIA) is double operational TL158；

(DZ) direct current output negativing ending grounding, anode connects terminals (PH～JH) i.e. LED string, and (JH) connects LED (DH4) sun Pole, (DH4) negative electrode connecting triode (QI) colelctor electrode, (QI) emitter stage connects (DH3) anode, and (DH3) negative electrode connects (DH2) sun Pole, (DH2) negative electrode connects (DH1) anode, and (DH1) negative electrode connects resistance (RI), (RI) other end ground connection；

(DZ) output all wave rectification power frequency sinuous pulsation DC voltage, (DH3～DH1) series voltage is amplifier TL158 power supply；

Resistance (RHL) connects (DH4) anode, and (RHL) other end connects constant current triode (QHL) emitter stage, and (QHL) base stage connects (DH4) negative electrode, (QHL) colelctor electrode connects (QI) base stage, starts resistance (RQ) and is connected in parallel between (QI) collection, emitter-base bandgap grading；

(QI) base stage connects resistance (RJH), and (RJH) other end connects current detecting pole (UIA) outfan；

Stabilivolt (DW) plus earth, negative electrode connects current-limiting resistance (RW), and (RW) other end connects (DH3) anode；

(UIA) in-phase input end connects (DW) negative electrode and resistance (RI1), and it is anti-with (UIA) that (RI1) other end connects resistance (RI2) Phase input, (RI2) other end connects (DH1) negative electrode；

Voltage follower (UIB) inverting input connects outfan, and in-phase input end connects resistance (RLW) and electric capacity (CLW), (RLW) another termination (DH3) anode, (CLW) other end ground connection；

(UIB) outfan connects temperature resistance (RWT), (RWT) another termination (UIA) inverting input.

Lamp the most according to claim 1 drives power supply, it is characterized in that；

Described power conversion circuit:

See (Fig. 3) isolation type high frequency capacitance decompression TL431 parallel shunt driver, power conversion circuit；

Power frequency peak high-frequency voltage limiter mode is used to prevent audion (QP) overvoltage；

Rectifier bridge (DZ) output plus terminal connects diode (DVM) anode, and (DVM) negative electrode connects electric capacity (CVM), (CVM) other end With (DZ) negativing ending grounding, (DZ) outfan is in parallel to (CL)；

High frequency transformer (TP) is paid limit and is set up amplitude limit winding one end ground connection, another terminating diode (DXF) anode, (DXF) negative electrode It is connected (DVM) negative electrode with starting resistance (RQ)；

Power frequency peak value (DXF) turns on, and by higher-order of oscillation superpressure energy feedback power, limits power frequency peak high-frequency voltage amplitude；

Described LED drive circuit:

High frequency transformer (TP) is paid winding one end, limit and is connected electric capacity (CH), and (TP) pays the limit winding other end and be connected with (CH) other end Rectifier bridge (DZG) ac input end, (DZG) outfan is in parallel with electric capacity (CLG), and (DZG) positive output end connects LED terminals (PH～JH), (JH) connects (DH2) anode, and (DH2) negative electrode connects (DH1) anode, and (DH1) negative electrode connects (RI), (RI) another Termination (DZG) negative output terminal；

Stabilivolt (DW) is in parallel with (CW), and (DW) negative electrode connects current-limiting resistance (RW), and (RW) other end connects (DH2) anode, (DW) negative electrode connects critesistor (RRM), and (RRM) connects (RI1), and (RI1) other end is connected (DI) and controls pole with (RI2), (RI2) (DH1) negative electrode is connected；

(DI) negative electrode connects resistance (RJH), and (RJH) other end connects (PH), and (DI) anode connects (DZG) negative output terminal；

(DI) in TL431 negative electrode, anode, audion series connection consumption reduction resistance (RJH) is in parallel with LED load.

Lamp the most according to claim 3 drives power supply, it is characterized in that:

Described LED drive circuit:

See (Fig. 4) NPN pipe load parallel shunt driver:

For blood pressure lowering reactance between terminals Z terminal (1,2), industrial frequency rectifying bridge (DZ) outfan is in parallel with electric capacity (CL), and (DZ) is negative defeated Go out and hold ground connection, positive output end connect (RJH), terminals (PH～JH), (RJH) other end connect (QI) colelctor electrode, (JH) another End connects (DH2) anode, and (DH2) negative electrode connects (DH1) anode, and (DH1) negative electrode connects (DI) anode, (QI) emitter stage and resistance (RI), (RI) other end ground connection；

(DH2) anode connects (RW), and (RW) other end connects stabilivolt (DW) negative electrode, and (DW) negative electrode connects (RI1), and (RI1) is another One end connects (DI) and controls pole and (RI2), (RI2) other end and (DW) plus earth；

(DH2) anode connects (RWT), and (RWT) other end connects (DI) and controls pole；

(DH2) anode connects (RDI), and (RDI) other end connects (DI) negative electrode, and (DI) negative electrode connects (DQM) anode, and (DQM) is cloudy Pole connects (QI) base stage, and (QI) base stage connects (RB), (RB) other end ground connection；

(RJH) external NPN audion of connecting is in parallel with LED load realizes shunt current regulation.

Lamp the most according to claim 1 drives power supply, it is characterized in that:

Described LED drive circuit:

See (Fig. 5) three-phase alternating voltage input PNP pipe Buck driver:

Three-phase commutation bridge common cathode half-bridge (DA1, DB1, DC1) DC output end (DC1) negative electrode, neutral with Alternating Current Power Supply transformator Line (JN) high-frequency filter capacitor (CL) in parallel, for LED drive circuit power supply；

Audion (QI) emitter stage connects rectification output (DC1) negative electrode, (QI) colelctor electrode series inductance (LBK), (LBK) other end Connecting LED load (PH～JH), (JH) connects LED (DH2) anode, and (DH2) negative electrode connects (DH1) anode, and (DH1) negative electrode is connected Current sampling resistor (RI), (RI) other end connects to neutral (JN)；

(QI) colelctor electrode connects fly-wheel diode (DX) negative electrode, and (PH) connects electric capacity (CH), and (DX) anode is with (CH) other end even Connect (DH1) negative electrode；

(DH2) anode connects diode (DGV) anode, and (DGV) negative electrode connects (CGV), and (CGV) other end connects to neutral (JN)；

Resistance (RDV), (RV1) connect temperature and control pole (DV) negative electrode, and (RV1) other end is connected (DV) control with (RV2), (RWT) Pole processed, (RDV), (RWT) other end connection (DGV) negative electrode, (RV2) other end connects to neutral (JN)；

Current detecting pole (DI) negative electrode connects resistance (RDI), (RDI) other end connects (DGV) negative electrode, and (DI) controls pole and connect electricity Resistance (RI1), (RI2), (RI1) other end connects (DV) negative electrode, and (RI2) other end connects (DH1) negative electrode；

(DI) negative electrode connects timing capacitor (CT), diode (DQF) negative electrode, audion (QF) colelctor electrode, (CT) another termination three Pole pipe (QTD) base diode (DBG) anode, (DQF) anode connects (QTD) base diode (DQ) anode；

(QTD) base stage connects diode (DQ) and (DBG) negative electrode, and (DQ) anode connects startup resistance (RQ), and (RQ) other end is even Connecing (DC1) negative electrode, (DBG) anode connects timing resistor (RT), and (RT) other end connects (DGV) negative electrode；

(QTD) colelctor electrode connecting triode (QF) base stage and resistance (RTD), (RTD) other end connects (QI) base stage, (QI) base stage Connecting (RJZ), (RJZ) other end connects (DC1) negative electrode, and (QTD) is connected (JN) with (QF) emitter stage；

External terminals (JTG) and (JN) shunt capacitance (CLG), (JTG) connects resistance (RTG), and (RTG) other end connects timing Resistance (RT) and diode (DBG) anode；

Three-phase commutation bridge diode (DA2), (DB2), (DC2) common-anode are (driver B) power supply with (JN) outfan.

Lamp the most according to claim 5 drives power supply, it is characterized in that:

Described LED drive circuit:

See (Fig. 6) NPN pipe Buck driver:

(DZ) DC output end shunt capacitance (CL), positive output end connects inductance (LBK), and (LBK) other end connects LED terminals (PH～JH), (JH) connects (DH3) anode, and (DH3) negative electrode connects (QI) colelctor electrode, and (QI) is connected (DH2) with (QGD) emitter stage Anode, (DH2) negative electrode connects (DH1) anode, (DH1) negative electrode series connection (RI) ground connection；

(DH3) anode connects startup resistance (RQ) and resistance (RQI), and (RQ) other end connects (QGD) base stage, (RQI) other end Connect (QI) base stage and (QGD) colelctor electrode；

Resistance (RDI), (RW), (RWT) connect (DH2) anode, and (RDI) other end connects (DI) negative electrode, and (RW) other end connects (DW) negative electrode, (RWT) other end connects (DI) and controls pole；

(DW) negative electrode connects (RI1), and (RI1) other end is connected (DI) and controls pole with resistance (RI2), and (DI) anode connects (DH1) Negative electrode, the other end of (RI2) and (DW) plus earth；

(DI) negative electrode connects stabilivolt (DWM) negative electrode, (DWM) anode connecting triode (QD) base stage, and (QD) colelctor electrode connects electricity Resistance (RDC), (RDC) other end connects (DH2) anode, (QD) grounded emitter；

(QD) colelctor electrode connects timing capacitor (CT), (CT) other end and timing resistor (RT) connecting triode (QTD) base stage, (RT) other end connects (DH2) anode；

(QTD) colelctor electrode connects resistance (RJH), (RF), and (RJH) other end connects (QGD) base stage, and (RF) other end connects (QD) Base stage, (QTD) grounded emitter；

(DZ) positive output end connects diode (DX) negative electrode, and (PH) connects (CH), and (DX) anode is connected (DH3) with (CH) other end Negative electrode.

Lamp the most according to claim 1 drives power supply, it is characterized in that:

Described power conversion circuit:

See (Fig. 7) single tube Amplitude Modulation High Frequency resonant mode gas discharge lamp drive:

Rectifier bridge (DZ) outfan is in parallel to (CL), and output plus terminal connects (TP) former limit centre tap, and (TP) former limit is in parallel with (CP), (CP) one end connects terminals (P1-1) and (DCX) negative electrode, and (CP) other end connects inductance (LH), and (LH) other end connects (P2- 2), (P1-1, P1-2), (P2-1, P2-2) respectively connect lamp two ends filament, and (P1-2), (P2-1) respectively connect start-up capacitance (CQ) two End, (DZ) output negative terminal and (DCX) plus earth；

Starting resistance (RQ1) and connect (RQ2) and controllable silicon (SCR) anode, (RQ1) other end connects (DZ) rectification output plus terminal, (RQ2) other end connects (TP) pair limit feedback winding and timing capacitor (CT), (CT) other end ground connection；

(SCR) anode connects triggering resistance (RK), and (RK) another termination (SCR) controls pole, (SCR) minus earth；

Inductance (LH) pays winding one end, limit series limiting resistor (RXL) ground connection, and the other end connects stabilivolt (DLM) anode, (DLM) Negative electrode connects (DLF) negative electrode, and (DLF) is in parallel with malleation charging resistor (RLZ), and (DLF) anode connects (DK) negative electrode, (DK) and electricity Holding (CK) in parallel, (DK) plus earth, (DK) negative electrode connects (SCR) and controls pole.

Lamp the most according to claim 7 drives power supply, it is characterized in that:

Described power conversion circuit:

See (Fig. 8) two-tube Amplitude Modulation High Frequency resonant mode translation circuit:

Rectifier bridge (DZ) outfan is in parallel to (CL), and (DZ) output malleation connects high frequency transformer (TP) primary side winding centre tap, (TP) two ends, former limit connecting triode (QP1), (QP2) colelctor electrode isolating diode (DC1), (DC2) anode respectively, (DC1), (DC2) negative electrode respectively connecting triode (QP1), (QP2) colelctor electrode, (DC1), (DC2) anode connect respectively diode (DCX1), (DCX2) negative electrode, (DCX1), (DCX2) anode and (QP1), (QP2) grounded emitter；

Inductance (LY) one end connect (TP) pay limit feedback winding centre tap, the other end connect timing capacitor (CT), (CT) another End ground connection.