CN204697378U - Small-power HID lamp drive circuit - Google Patents

Small-power HID lamp drive circuit Download PDF

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Publication number
CN204697378U
CN204697378U CN201520316173.4U CN201520316173U CN204697378U CN 204697378 U CN204697378 U CN 204697378U CN 201520316173 U CN201520316173 U CN 201520316173U CN 204697378 U CN204697378 U CN 204697378U
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resistance
circuit
power
output
hid lamp
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CN201520316173.4U
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潘玉灼
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Quanzhou Normal University
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Quanzhou Normal University
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    • 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

Abstract

The utility model discloses a kind of small-power HID lamp drive circuit, its reduction voltage circuit adopts pulse-width modulation type DC-DC circuit, comprises operational amplifier, current control mode pulse width modulator and the first switching tube.The utility model is connected with reference resistance by the inverting input of the operational amplifier at reduction voltage circuit, be in series with the 3rd resistance after this reference resistance is in parallel with digit-control resistance by adjustable resistance, the feedback signal of full-bridge output current flows into the in-phase input end of amplifier, the feed back input value of this feedback signal is only relevant with the resistance of reference resistance, and the resistance finally by controlling the digit-control resistance in reference resistance changes the power output (lamp power) of circuit.User sends instruction by functional unit to single chip machine controlling circuit, and single chip machine controlling circuit exports control signal to digit-control resistance, controls the resistance of digit-control resistance, thus realizes the power output, the brightness of adjustment HID lamp that freely change HID lamp artificially.

Description

Small-power HID lamp drive circuit
Technical field
The utility model relates to lighting device drive circuit, is specifically related to a kind of small-power HID lamp drive circuit.
Background technology
Lighting source is key element indispensable in human lives, and along with population constantly increases, people also increase day by day for the demand of lighting source.And the good characteristics of luminescence such as high-intensity gas discharge lamp (HID) has that brightness is high, luminous efficiency is high, do not lure worm, the life-span is long, thus there is the value of research.
Existing small-power HID lamp, its drive circuit is all generally adopt to obtain feedback from HID lamp operating current and carry out power limitation control, freely cannot change the power output of HID lamp artificially, regulate the brightness of HID lamp.
Existing small-power HID lamp, in order to effectively avoid acoustic resonance phenomenon, adopt low-frequency square-wave to drive when stable state, the frequency range of such low-frequency square-wave, far below audio resonance frequency band, can extend the useful life of HID lamp.If but also adopted low frequency driving square wave to carry out lighting when starting, be unfavorable for formation and the maintenance of HID lamp electric arc when starting, HID lamp would not easily be lighted.
In addition, the control mode major part of existing HID lamp only uses cable power switch, and can only carry out the operations such as light modulation, timing and switch lamp by on-site manual to HID lamp during use, it is not too convenient to use.
Utility model content
The purpose of this utility model is to provide a kind of power output, the small-power HID lamp drive circuit that regulates HID lamp brightness that freely can change HID lamp artificially.
To achieve these goals, the utility model adopts following technical scheme:
Small-power HID lamp drive circuit, comprise current rectifying and wave filtering circuit, circuit of power factor correction, reduction voltage circuit and the full-bridge inverting and firing circuit that are connected successively, the input of current rectifying and wave filtering circuit connects mains supply, and the output of full-bridge inverting and firing circuit connects load; Also comprise single chip machine controlling circuit, the output of single chip machine controlling circuit is connected with the corresponding controling end of circuit of power factor correction, reduction voltage circuit and full-bridge inverting and firing circuit respectively;
Reduction voltage circuit comprises operational amplifier, current control mode pulse width modulator and the first switching tube, the in-phase input end of operational amplifier is connected to the source electrode of the first switching tube, the inverting input of operational amplifier is connected with reference resistance, this reference resistance comprises the first resistance, the second resistance and the 3rd resistance, be in series with the 3rd resistance after first resistance and the second resistor coupled in parallel, first resistance is adjustable resistance, and the second resistance is digit-control resistance; The output of operational amplifier connects the input of current control mode pulse width modulator, the output of current control mode pulse width modulator connects the grid of the first switching tube, the drain electrode of the first switching tube connects the output of circuit of power factor correction, and the source electrode of the first switching tube is the output of reduction voltage circuit; The control end of digit-control resistance is connected to the corresponding output end of single chip machine controlling circuit, and single chip machine controlling circuit is connected with the adjustment member of the resistance regulating digit-control resistance in a wired or wireless manner.
Above-mentioned single chip machine controlling circuit is using the STM32F103 of ARM Cortex-M3 kernel as main control chip; The model of above-mentioned operational amplifier is LM2904, and the model of above-mentioned current control mode pulse width modulator is UC3845, and the model of above-mentioned first switching tube is 4N60, and above-mentioned digit-control resistance adopts digital regulation resistance X9313WSZ.
Above-mentioned full-bridge inverting and firing circuit comprise second switch pipe Q5, auto-excitation type full bridge driver U4, bridge inverter main circuit and transformer T1, the grid of second switch pipe Q5 connects the output of above-mentioned single chip machine controlling circuit, auto-excitation type full bridge driver U4 is connected with frequency modulation loop, this frequency modulation loop comprises electric capacity C5, resistance R6 and electric capacity C8, resistance R6 and electric capacity C8 is serially connected with the RT end of auto-excitation type full bridge driver, and the CT that the connected node of resistance R6 and electric capacity C8 is connected to auto-excitation type full bridge driver U4 holds and by the drain electrode of electric capacity C5 second switch pipe Q5.
The communication interface of above-mentioned single chip machine controlling circuit is connected with bluetooth module or NRF module.
After adopting such scheme, small-power HID lamp drive circuit of the present utility model, its reduction voltage circuit adopts pulse-width modulation type DC-DC circuit, comprise operational amplifier, current control mode pulse width modulator and the first switching tube, the output voltage of reduction voltage circuit is determined by the output pulse width of current control mode pulse width modulator, and the pulsewidth that current control mode pulse width modulator exports is regulated by operational amplifier.The utility model is connected with reference resistance by the inverting input of the operational amplifier at reduction voltage circuit, be in series with the 3rd resistance after this reference resistance is in parallel with digit-control resistance by adjustable resistance, the feedback signal of full-bridge output current flows into the in-phase input end of amplifier, the feed back input value of this feedback signal is only relevant with the resistance of reference resistance, and the resistance finally by controlling the digit-control resistance in reference resistance changes the power output (lamp power) of circuit.When the resistance of digit-control resistance causes more greatly feedback resistance larger, then lamp power is larger; Otherwise the less feedback resistance that causes of the resistance of digit-control resistance is less, then lamp power is less.User sends instruction by functional unit to single chip machine controlling circuit, and single chip machine controlling circuit exports control signal to digit-control resistance, controls the resistance of digit-control resistance, thus realizes the power output, the brightness of adjustment HID lamp that freely change HID lamp artificially.
Small-power HID lamp drive circuit of the present utility model, firm when starting single chip machine controlling circuit output low level to the grid of the second switch pipe Q5 of full-bridge inverting and firing circuit, second switch pipe Q5 ends, the square wave frequency that at this time auto-excitation type full bridge driver U4 exports is set by the resistance R6 between its 3rd, the 4th pin and electric capacity C8, now square wave frequency is higher, carries out lighting by this high frequency square wave, contributes to HID lamp when starting, be conducive to formation and the maintenance of electric arc, HID lamp is more easily lighted; After HID lamp enters stable state, single chip machine controlling circuit is by exporting high level second switch pipe Q5 conducting, now electric capacity C5 is in parallel with electric capacity C8, square wave between auto-excitation type full bridge driver U4 the 3rd, the 4th pin arranges frequency and diminishes, by the work of this low-frequency square-wave supply HID lamp, use low-frequency square-wave drive circuit ideally to go up and fluorescent tube one firm power can be provided, avoid the contingent acoustic resonance phenomenon when high-frequency work.And in the utility model, adopt high-frequency resonant lighting only to need one group of inductor and capacitor, do not need other voltage-multiplying circuit, step-up transformer etc., required device is few, and cost is lower.
Small-power HID lamp drive circuit of the present utility model, the communication interface of single chip machine controlling circuit is connected with bluetooth module or NRF module, by this bluetooth module or NRF module, coordinate remote controller, Long-distance Control can be carried out to drive circuit, HID lamp is carried out to the operations such as light modulation, timing and switch lamp, use easily.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of circuit of power factor correction in Fig. 1;
Fig. 3 is the circuit theory diagrams of reduction voltage circuit in Fig. 1;
Fig. 4 is the power control principle figure of operational amplifier and current control mode pulse width modulator in Fig. 3;
Fig. 5 is the circuit theory diagrams of full-bridge inverting and firing circuit in Fig. 1;
Fig. 6 is the circuit theory diagrams of single chip machine controlling circuit in Fig. 1;
Fig. 7 is the functional block diagram of digital regulation resistance X9313 in the utility model;
Fig. 8 is the signal processing flow figure of single chip machine controlling circuit in the utility model;
Fig. 9 is the menu schematic diagram of remote control end display screen in the utility model;
Figure 10 is Power Regulation resistance and power output graph of a relation in the utility model.
Embodiment
Small-power HID lamp drive circuit of the present utility model, as shown in Figure 1, comprises EMI rectifying/filtering circuit, circuit of power factor correction, reduction voltage circuit, DC/AC full-bridge inverting and firing circuit and single chip machine controlling circuit.The input of EMI rectifying/filtering circuit connects civil power input power ~ 220V, the output of EMI rectifying/filtering circuit connects circuit of power factor correction, reduction voltage circuit and DC/AC full-bridge inverting and firing circuit successively, the output of DC/AC full-bridge inverting and firing circuit connects load, and the output of single chip machine controlling circuit is connected with the corresponding controling end of circuit of power factor correction, reduction voltage circuit and full-bridge inverting and firing circuit respectively.
Electromagnetic interference (EMI) is a kind of electromagnet phenomenon because electromagnetic wave causes equipment, transmission channel or systematic function to reduce.Therefore, will electromagnetic interference be suppressed at the input of circuit, thus obtain a stable system.In order to ensure that HID lamp drive circuit can normally work, in the utility model, be provided with EMI rectifying/filtering circuit, civil power ~ 220V voltage to rectifier bridge, exports the power supply of 310V pulsating dc voltage as whole drive circuit through EMI common mode filtering.In order to improve the functional reliability of drive circuit, the utility model is also equipped with accessory power supply.
Exchange input after filtering and rectification, nonlinear load makes wave distortion, and input current is impulse waveform, containing a large amount of harmonic components, causes power factor low.In order to improve power factor, the utility model is provided with circuit of power factor correction.
As shown in Figure 2, circuit of power factor correction is formed primarily of power factor correction controller U1 (L6561D), transformer T3, power switch pipe Q7, diode D4, output capacitance C25 and feedback network.Power factor correction controller U1 uses momentary mode technology (Transition Mode Technique) to reach to make input current be the object of sin waveform, i.e. electric current and voltage in phase.Resistance R in circuit 18, R 19form voltage network, for detecting input voltage waveform and phase place, through the 3rd pin input of power factor correction controller U1, as an input source of multiplier.After boosting, voltage is through resistance R 25, R 26after making comparisons in 1st pin of dividing potential drop input power factor correction controller U1 and IC internal reference point position, export through the compensating network between the 1st pin and the 2nd pin two ends again, using another input source as internal multiplier, these two voltages, after multiplier product, can obtain a ratio string ripple reference voltage V r (t)as the foundation on power switch cut-off opportunity.The 7th pin output drive signal of power factor correction controller U1, resistance R 22play and allow the fast cutoff function of the slow conducting of power switch pipe Q7, when the 7th backpedalling brake level drive singal of power factor correction controller U1 makes power switch pipe Q7 conducting, inductive current is according to d i/ d tslope rises, and flows through resistance R 24, power taking resistance R 24cross-pressure V r24through the 4th pin and the reference voltage V of power factor correction controller U1 r (t)make comparisons, work as V sR21>V r (t)time, the 7th pin of power factor correction controller U1 drags down voltage, and power switch pipe Q7 is ended.Transformer T3 primary coil is mainly used as boost inductance, and secondary coil detects inductive current zero cross signal, resistance R 21that inductive current detects resistance.Power factor correction controller U1 has output over-voltage protection (OVP) function, and when output voltage is excessive, overshoot current is through resistance R 25flow to the error amplifier of power factor correction controller U1, if the electric current flowing into error amplifier is greater than 40 μ A, power factor correction controller U1 will close driver output with protective circuit.
After circuit of power factor correction by prime, a stable 400V direct voltage can be obtained, but the operating voltage of HID lamp is far below 400V, so need, by reduction voltage circuit, the direct current of 400V is carried out step-down.
What adopt in the utility model is pulse-width modulation (PWM) formula DC-DC circuit.As shown in Figure 3, reduction voltage circuit comprises operational amplifier U2 (LM2904), current control mode pulse width modulator U3 (UC3845) and switching tube Q6 (4N60).The output voltage of reduction voltage circuit is determined by the output pulse width of current control mode pulse width modulator U3, and the pulsewidth that current control mode pulse width modulator U3 exports is regulated by operational amplifier U2.The in-phase input end (the 3rd pin) of operational amplifier U2 is connected to the source electrode of switching tube Q6 by resistance R9 and diode D3, the inverting input (the 2nd pin) of operational amplifier U2 is connected with reference resistance, and this reference resistance comprises resistance R8, resistance R xwith resistance R10, resistance R8 and resistance R xafterwards in parallel and resistance R10 is in series, and resistance R8 is adjustable resistance, resistance R xfor digit-control resistance.The output (the 1st pin) of operational amplifier U2 connects the input (the 2nd pin) of current control mode pulse width modulator U3, the output (the 6th pin) of current control mode pulse width modulator U3 is connected to the grid of switching tube Q6 by transformer T2, the drain electrode of switching tube Q6 connects the output (direct current 400V voltage) of circuit of power factor correction, and the source electrode of switching tube Q6 is the output of reduction voltage circuit.
Operational amplifier U2 (LM2904) can be reduced to power control chart as shown in Figure 4 with the circuit of current control mode pulse width modulator U3 (UC3845), the change of power is essentially the change of PWM duty ratio, and therefore Fig. 4 is also the control chart of PWM duty ratio.As shown in Figure 4, resistance R 8with digit-control resistance R xafter parallel connection again with resistance R 10reference resistance in series, the 1st pin of operational amplifier U2 is its output, resistance R 7for feedback resistance.K ii lAMPfor the feedback signal of full-bridge output current, K ii lAMPby one, what connect with it is with reference to sample resistance R with ground 15convert voltage to, after a resistance R 9the 3rd pin through operational amplifier U2 flows into the in-phase input end of amplifier.
Reference resistance R '=R can be obtained according to Fig. 4 10+ R 8//R x(1-1)
The error amplifier of current control mode pulse width modulator U3 has high open circuit gain, and therefore when closed-loop path, the output voltage of in-phase proportion transport and placing device can at V rEFnear do small variation, in the great situation of error amplifier open circuit gain, can suppose that the output of in-phase proportion amplifier is u o=V rEF, relational expression below can be obtained thus
u O = V REF = ( 1 + R 7 R ′ ) · K I I LAMP - - - ( 1 - 2 )
I LAMP = V REF ( 1 + R 7 / R ′ ) · K I - - - ( 1 - 3 )
Lamp power P lAMP=V lAMPi lAMP, can obtain
P LAMP = V REF · V LAMP ( 1 + R 7 / R ′ ) · K I - - - ( 1 - 4 )
Circuit is when low frequency steady operation, and the negative resistance charactertistic according to HID lamp can learn voltage V lAMPsubstantially remain unchanged.P can be obtained from formula 1-4 lAMPonly relevant with R ', and reference resistance can by known of formula 1-1 and R xrelevant, so by controlling digit-control resistance R x(X9313D) method changing the power output of circuit is feasible.Work as R xresistance cause more greatly R ' larger, then P lAMPlarger; Otherwise, R xthe less R ' that causes of resistance less, then P lAMPless.
Table 2 is R ' value and power output, input power, and the table of comparisons of efficiency is as shown in table 2, and when R ' resistance is greatly about 9.8K about Ω, greatly about half-power point about 20W, and when R ' resistance is about 18K Ω, power output reaches power-handling capability.Resistance and power output present proportional relationship as seen from Figure 10.
Table 2
As shown in Fig. 4, Fig. 6, digit-control resistance R xcontrol end be connected to corresponding output end (the digit-control resistance R of single chip machine controlling circuit x's pin, pin and pin is connected to 10 pin of the main control chip U5 of single chip machine controlling circuit, 32 pin and 33 pin respectively), in order to realize single chip machine controlling circuit, the resistance of digit-control resistance is regulated, the adjustment members such as button can be connected with at the corresponding controling end of single chip machine controlling circuit, by this adjustment member, field control is carried out to single chip machine controlling circuit, regulate digit-control resistance R xresistance realize the power output, the adjustment HID lamp brightness that freely change HID lamp artificially; Conveniently use, by wireless mode, single chip machine controlling circuit is controlled, e.g., be connected with bluetooth module or NRF module by the communication interface of single chip machine controlling circuit, coordinate remote controller to carry out Long-distance Control to single chip machine controlling circuit, regulate digit-control resistance R xresistance realize the power output, the adjustment HID lamp brightness that freely change HID lamp artificially.Adopt the mode of Long-distance Control to substantially improve the task difficulty of user, and can realize Power Regulation function can according to user voluntarily demand according to circumstances change HID lamp brightness energy savings in real time.
As shown in Figure 9, the function realized as required, divides the Menu of remote control end display screen in order to four level one choice, has current state to show, timing mode, regulating power and closedown HID lamp.Current state display by the system time of HID lamp and power in real time on a display screen display better to control; Timing mode is closed by HID timing; Regulating power is as the term suggests be just used to the brightness regulating HID lamp; Even if closedown and real-time by HID lamp close be in timing mode under.
As shown in Figure 7, in the utility model, digit-control resistance R x(digital regulation resistance X9313WSZ) inside comprises control circuit, five up/down binary counters, 32 select 1 decoder, five E 2pROM and electric resistance array.Electric resistance array includes 31 resistance units, has at two end points of each unit the tapping point can accessed by sliding unit, and its maximum resistance is 10K Ω.To the access of sliding unit tapping point position by with the data that three inputs input count through five forward-backward counters, 32 select 1 decoder for decoding after control single contact electronic switch realize.Work is carried out in the mode of " first connect and disconnect afterwards " when sliding end changes tap position.The resolution of X9313WSZ is 10000/31=323 Ω.Table 1 is the pin explanation of digital regulation resistance X9313WSZ.
Table 1
As shown in Figure 5, full-bridge inverting and firing circuit comprise switching tube Q5, auto-excitation type full bridge driver U4 (IRS2453), bridge inverter main circuit and transformer T1.
Bridge inverter main circuit is formed by 4 power switch pipes Q1, Q2, Q3, Q4, power switch pipe Q1, Q4 and power switch pipe Q2, Q3 form two conducting loops respectively, when power switch pipe Q1, Q4 conducting, power switch pipe Q2, Q3 disconnect, and input current forms loop through the primary winding coil of power switch pipe Q1, transformer T1 and power switch pipe Q4; In like manner, when power switch pipe Q2, Q3 conducting, power switch pipe Q1, Q4 disconnect, input current forms loop through the primary winding coil of power switch pipe Q3, transformer T1 and power switch pipe Q2, two pairs of metal-oxide-semiconductor alternate conduction, the low-frequency square-wave exported is powered to HID lamp, enables the work that HID lamp is stable.
The grid of switching tube Q5 connects the output of single chip machine controlling circuit, auto-excitation type full bridge driver U4 is connected with frequency modulation loop, this frequency modulation loop comprises electric capacity C5, resistance R6 and electric capacity C8, resistance R6 and electric capacity C8 is serially connected with RT end (4 pin) of auto-excitation type full bridge driver U4, and the CT that the connected node of resistance R6 and electric capacity C8 is connected to auto-excitation type full bridge driver U4 holds (3 pin) and passes through the drain electrode of electric capacity C5 second switch pipe Q5.
The utility model adopts high-frequency lighting, and low frequency steady operation, so circuit needs the action that a time high frequency turns low frequency.Firm when starting single chip machine controlling circuit output low level to the grid of the switching tube Q5 of full-bridge inverting and firing circuit, switching tube Q5 ends, the square wave frequency that at this time auto-excitation type full bridge driver U4 exports is set by the resistance R6 between its 3rd, the 4th pin and electric capacity C8, frequency formula is F=1/ (1.453*R6*C8), now square wave frequency is higher, carries out lighting by this high frequency square wave, contributes to HID lamp when starting, be conducive to formation and the maintenance of electric arc, HID lamp is more easily lighted; After HID lamp enters stable state, single chip machine controlling circuit is by exporting high level switching tube Q5 conducting, now electric capacity C5 is in parallel with electric capacity C8, square wave between three or four pin arranges frequency and becomes F=1/ [1.453*R6* (C8+C5)], square wave between auto-excitation type full bridge driver U4 the 3rd, the 4th pin arranges frequency and diminishes, by the work of this low-frequency square-wave supply HID lamp, use low-frequency square-wave drive circuit ideally to go up and fluorescent tube one firm power can be provided, avoid the contingent acoustic resonance phenomenon when high-frequency work.And in the utility model, adopt high-frequency resonant lighting only to need one group of inductor and capacitor, do not need other voltage-multiplying circuit, step-up transformer etc., required device is few, and cost is lower.
As shown in Figure 6, its main control chip U5 employing take ARMCortex-M3 as the STM32F103 of kernel to single chip machine controlling circuit, receives the signal of bluetooth module or the transmission of NRF module, carries out the regulation and control of drive circuit.The minimum system circuit of main control chip U5 is made up of crystal oscillating circuit, reset circuit, indicator light circuit.Each performs its own functions for two crystal oscillating circuits of crystal oscillating circuit, and 8M HSE crystal oscillator is used as PLL frequency multiplication; 32.768K crystal oscillator is external low frequency crystal oscillator, also claims clock crystal oscillator, uses when timing and system standby.The 15V of accessory power supply is converted into 3.3V and powers to main control chip U5, NRF module, bluetooth module, digital regulation resistance X9313WSZ by power module AMS117.
Open in HID lamp, after system enters invariable power state, main control chip U5 is just in whether testing circuit is abnormal receives in the state of signal with whether having always.If have remote port send signal received after, main control chip U5 starts to read receiving register status command, when status command is readable, reads and receives instruction, the data of reception and length, otherwise emptying buffer.Next, judge School Affairs and frame head, after all correct, start arbitration functions word.According to the function word received, perform corresponding instruction action.Main control chip U5 signal handler flow process as shown in Figure 8.
By the experiment that is energized for a long time, drive circuit of the present utility model is in the input voltage fluctuation situation of alternating current 170V ~ 265V, and HID lamp drive circuit works is stablized, invariable power works, power factor (PF) is greater than 0.93, and operating efficiency is about 87%, noiseless resonance phenomena.The Long-distance Control to Metal halogen lamp can be realized well.Experimental result shows, the HID lamp that this circuit can be public illumination provides a kind of high performance-price ratio, energy-conservation drive circuit.

Claims (4)

1. small-power HID lamp drive circuit, comprise current rectifying and wave filtering circuit, circuit of power factor correction, reduction voltage circuit and the full-bridge inverting and firing circuit that are connected successively, the input of current rectifying and wave filtering circuit connects mains supply, and the output of full-bridge inverting and firing circuit connects load; Also comprise single chip machine controlling circuit, the output of single chip machine controlling circuit is connected with the corresponding controling end of circuit of power factor correction, reduction voltage circuit and full-bridge inverting and firing circuit respectively; It is characterized in that:
Reduction voltage circuit comprises operational amplifier, current control mode pulse width modulator and the first switching tube, the in-phase input end of operational amplifier is connected to the source electrode of the first switching tube, the inverting input of operational amplifier is connected with reference resistance, this reference resistance comprises the first resistance, the second resistance and the 3rd resistance, be in series with the 3rd resistance after first resistance and the second resistor coupled in parallel, first resistance is adjustable resistance, and the second resistance is digit-control resistance; The output of operational amplifier connects the input of current control mode pulse width modulator, the output of current control mode pulse width modulator connects the grid of the first switching tube, the drain electrode of the first switching tube connects the output of circuit of power factor correction, and the source electrode of the first switching tube is the output of reduction voltage circuit; The control end of digit-control resistance is connected to the corresponding output end of single chip machine controlling circuit, and single chip machine controlling circuit is connected with the adjustment member of the resistance regulating digit-control resistance in a wired or wireless manner.
2. small-power HID lamp drive circuit according to claim 1, is characterized in that: above-mentioned single chip machine controlling circuit is using the STM32F103 of ARM Cortex-M3 kernel as main control chip; The model of above-mentioned operational amplifier is LM2904, and the model of above-mentioned current control mode pulse width modulator is UC3845, and the model of above-mentioned first switching tube is 4N60, and above-mentioned digit-control resistance adopts digital regulation resistance X9313WSZ.
3. small-power HID lamp drive circuit according to claim 1, it is characterized in that: above-mentioned full-bridge inverting and firing circuit comprise second switch pipe Q5, auto-excitation type full bridge driver U4, bridge inverter main circuit and transformer T1, the grid of second switch pipe Q5 connects the output of above-mentioned single chip machine controlling circuit, auto-excitation type full bridge driver U4 is connected with frequency modulation loop, this frequency modulation loop comprises electric capacity C5, resistance R6 and electric capacity C8, resistance R6 and electric capacity C8 is serially connected with the RT end of auto-excitation type full bridge driver, the CT that the connected node of resistance R6 and electric capacity C8 is connected to auto-excitation type full bridge driver U4 holds and by the drain electrode of electric capacity C5 second switch pipe Q5.
4. small-power HID lamp drive circuit according to claim 1, is characterized in that: the communication interface of above-mentioned single chip machine controlling circuit is connected with bluetooth module or NRF module.
CN201520316173.4U 2015-05-15 2015-05-15 Small-power HID lamp drive circuit Expired - Fee Related CN204697378U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104822216A (en) * 2015-05-15 2015-08-05 泉州师范学院 Miniwatt HID lamp drive circuit
WO2019128017A1 (en) * 2017-12-30 2019-07-04 深圳佳比泰智能照明股份有限公司 Bluetooth fireplace apparatus and system
CN110582153A (en) * 2019-08-01 2019-12-17 福建睿能科技股份有限公司 Driving circuit, driving method thereof and electronic ballast

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104822216A (en) * 2015-05-15 2015-08-05 泉州师范学院 Miniwatt HID lamp drive circuit
CN104822216B (en) * 2015-05-15 2019-05-07 泉州师范学院 Small-power HID lamp driving circuit
WO2019128017A1 (en) * 2017-12-30 2019-07-04 深圳佳比泰智能照明股份有限公司 Bluetooth fireplace apparatus and system
CN110582153A (en) * 2019-08-01 2019-12-17 福建睿能科技股份有限公司 Driving circuit, driving method thereof and electronic ballast
CN110582153B (en) * 2019-08-01 2022-04-01 福建睿能科技股份有限公司 Driving circuit, driving method thereof and electronic ballast

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