CN205912289U - Adjustable LED lamp driving circuit of wide voltage - Google Patents
Adjustable LED lamp driving circuit of wide voltage Download PDFInfo
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- CN205912289U CN205912289U CN201620706591.9U CN201620706591U CN205912289U CN 205912289 U CN205912289 U CN 205912289U CN 201620706591 U CN201620706591 U CN 201620706591U CN 205912289 U CN205912289 U CN 205912289U
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Abstract
The utility model provides an adjustable LED lamp driving circuit of wide voltage belongs to illumination electron technical field. It has solved to have how to realize the stable problem of adjusting luminance of high performance at wide voltage input within range. This circuit is including being used for connect the input rectifying and wave -filtering unit of input and the output Rectifier filtering unit that is used for connecting the LED load, still include the compatible unit of silicon controlled rectifier, DC DC converting unit and dimming control module, input rectifying and wave -filtering unit, the compatible unit of silicon controlled rectifier, DC DC converting unit and output Rectifier filtering unit connect gradually respectively, dimming control module includes the on -off control unit, compare amplifying unit and voltage current feedback sampling unit, voltage current feedback sampling unit sampling output rectifying and wave -filtering unit output current voltage is through feeding back to the on -off control unit after relatively the amplifying unit relatively enlargies, on -off control unit output connection DC DC converting unit. This drive circuit can stable realization of high performance adjust luminance at wide voltage input within range.
Description
Technical field
The utility model belongs to lighting electronic technical field, is related to a kind of Width funtion adjustable LED lamp drive circuit.
Background technology
Led is the abbreviation that English light emitting diode is light emitting diode, its basic structure be one piece electroluminescent
Luminous chip of semiconductor material, with elargol or latex solidified on support, then uses silver wire or gold thread to connect chip and circuit
Plate, then surrounding epoxy sealing, plays the effect of protection internal core, finally installs shell.Nowadays, led illuminates
Become a mainstream technology.LED lamp bubble has efficiency and the longer life of brilliance, after using the illumination of high energy efficiency led instead, the energy of realization
Source saving will be very surprising.Adjustable LED lamp becomes the green illumination product enjoying user's favor on our times.Due to
LED lamp is a kind of nonlinear load, fluorescent tube have minimum to conducting voltage, if the voltage on fluorescent tube be less than certain value, can put out
Go out or can not light.High performance dimming driving circuit, can be carried out when different especially for every country, regional power voltage
Function admirable light modulation drive.
For this reason, Chinese patent literature discloses the adjustable LED lamp power driving circuit of Application No. 201020214658.x,
This circuit includes filter circuit, and described filter circuit is connected with rectifier bridge, and rectifier bridge connects start-up circuit, and start-up circuit connects control
Coremaking piece, control chip connection transformer.Power supply is powered to led luminescent wafer through voltage device.This circuit provides modulability
Can excellent, stable work in work light adjusting circuit.But the input electricity that this circuit is only suitable for narrow voltage carries out dimming work.In electricity
When pressing through low or too high, circuit will burn out and cannot carry out stable light modulation work for Width funtion input electricity.
Content of the invention
The utility model is directed to the problems referred to above of prior art presence it is proposed that a kind of adjustable LED lamp of Width funtion drives electricity
Road.This circuit solves the problems, such as that how to realize high-performance in wide range input voltage stably dims.
The utility model is realized by following technical proposal: a kind of Width funtion is adjustable LED lamp drive circuit, including for
Connect the input rectifying filter unit of power input and the output rectification filter unit for connecting led load, its feature exists
In also including controllable silicon light modulation compatibility unit, dc-dc converter unit and dimming controlling module, described input rectifying filtering is single
Unit, controllable silicon light modulation compatibility unit, dc-dc converter unit and output rectification filter unit are sequentially connected respectively, described light modulation
Control module includes switch control unit, compares amplifying unit and feedback of voltage and current sampling unit, described feedback of voltage and current
The output current voltage of sampling unit sampling output rectification filter unit, and fed back to after comparing amplifying unit to compare amplification
Switch control unit, described switch control unit output end connects dc-dc converter unit.
On main circuit, Width funtion power supply is conveyed to input rectifying filter unit to the Width funtion entering by power input
Power supply carries out rectifying and wave-filtering, and the smooth direct current electricity after process entered controllable silicon light modulation compatibility unit increases light modulation compatibility.With
When export, to dc-dc converter unit, fixing dc source be transformed into variable DC voltage.And the change of dc-dc converter unit
Degree of changing is controlled realizing by switch control unit.The regulation and control of switch control unit are according to feedback of voltage and current sampling unit
Sampling output rectification filter unit output current voltage feeds back signal after comparing amplifying unit to compare amplification and is controlled.This
No matter drive circuit is high pressure in wide range input voltage or low pressure can high-performance stably be realized dimming.
In above-mentioned Width funtion adjustable LED lamp drive circuit, described controllable silicon light modulation compatibility unit include electric capacity two,
Electric capacity three, electric capacity eight, resistance unit two and resistance unit three, the output end that described electric capacity two is parallel to input rectifying filter unit is positive and negative
Pole, resistance unit two and electric capacity three are parallel to the two ends of electric capacity two after being connected in series, resistance unit three one end connects input rectifying filtering
The output head anode of unit, resistance unit three other end connecting valve control unit, simultaneously resistance unit three other end be also connected with electric capacity
Eight and connect artificially generated terrain and become loop, resistance unit two be resistance seven, resistance eight and resistance nine be connected in parallel combination, described resistance unit
Three is the tandem compound of resistance 11 and resistance 12.This controllable silicon light modulation compatibility unit passes through electric capacity and resistance characteristic is realized
Before cut and after cut the compatibility of light modulator, thus realizing that efficiency of transmission is high, load is minimum be adjustable to 1w within, dimming scope width.More
It is that controllable silicon light modulation lower cost solution for other countries' different in width voltage opens gate.
In above-mentioned Width funtion adjustable LED lamp drive circuit, described switch control unit include drive control chip and
External mos pipe, described drive control INTRA-CHIP POWER mos drain electrode connects external mos pipe source electrode, in described drive control chip
Power mos drain electrode in portion is connected diode three, the output head anode of above-mentioned input rectifying filter unit with forward direction between chip power
Simulation ground, the grid of described external mos pipe are followed by by resistance 13, resistance 14 and the polar capacitor one being sequentially connected in series
Electric capacity eight positive pole is connected by resistance ten, the drain electrode of described external mos pipe connects dc-dc converter unit.Control here by driving
The power mos leakage of chip internal processed and external mos pipe are realized pwm impulse modulation and are controlled, in the easy situation of ON-OFF control circuit
It is issued to the purpose of stable light modulation.
In above-mentioned Width funtion adjustable LED lamp drive circuit, described dc-dc converter unit includes step-down transformer and auxiliary
Help circuit, described auxiliary circuit includes connecting electric capacity four, resistance 15 and diode one, electric capacity four and resistance 15 are connected in series
Parallel diode one afterwards, the output head anode of diode one Opposite direction connection input rectifying filter unit and the drain electrode of external mos pipe, institute
The primary coil stating step-down transformer connects the drain electrode of external mos pipe and output rectification filter unit, described step-down transformer time
Level coil forms series loop, the secondary of step-down transformer with the feedback signal sampling end of drive control chip and chip ground pin
The two ends of coil are also connected in parallel to resistance 21 and resistance 22.Here dc-dc converter unit achieves direct current and fixes
The conversion to direct current variable voltage for the voltage.According to the control of switch control unit adjustment enable dc-dc converter unit according to
Light modulation demand exports constant electric current in input wide-voltage range.Realize high performance stable Width funtion dimming function.With
When resistance 21 and resistance 22 be parallel to step-down transformer secondary coil two ends be used for electric current Serial regulation.Carry
High dimming behavior.
In above-mentioned Width funtion adjustable LED lamp drive circuit, described feedback of voltage and current sampling unit includes triode
With the resistance 18 connecting output rectification filter unit output end, resistance 18 is connected in series with resistance 19 and resistance 20,
Resistance 20 two ends are parallel with electric capacity six, and resistance 20 two ends are also parallel to base stage and the emitter stage of triode, described triode
Colelctor electrode by resistance 26 connect drive control chip stabiloity compensation end, above-mentioned drive control chip current sampling end
External sampling resistor.Here by the sampling of output voltage and compare after amplifying circuit amplifies and feed back to drive control chip,
Current sample is realized by the external sampling resistor of drive control chip current sampling end simultaneously.I.e. internal power mos source electrode
External sampling resistor realizes the impact to switch control unit.
In above-mentioned Width funtion adjustable LED lamp drive circuit, described input rectifying filter unit include filter inductance one,
Filter inductance two, filter inductance three, filter capacitor one, resistance unit one and rectifying tube, described filter inductance one and filter inductance three
Connect the input of rectifying tube respectively, described filter capacitor one reconnects the output of rectifying tube with resistance unit two after being connected in series
End, the input series filtering inductance three of described resistance unit one, described input rectifying filter unit and controllable silicon light modulation compatibility
Unit is high internal pressure element.Here by the composition unit device to input rectifying filter unit and controllable silicon light modulation compatibility unit
Part selects high internal pressure element, i.e. filter inductance one, filter inductance two, filter inductance three, filter capacitor one, resistance unit one, rectification
Pipe, electric capacity two, electric capacity three, electric capacity eight, resistance unit two and resistance unit three are all realized from inner high voltage components and parts.Thus ensureing
Accuse during wide voltage input and will not burn out during voltage, low-voltage can encourage again.Realize the Width funtion light modulation work(of 85-265v
Energy.
In above-mentioned Width funtion adjustable LED lamp drive circuit, described drive control chip is ct2108 family chip.
Ct2108 family chip is the led driving chip of non-isolated high-accuracy and constant flow control.There is high input power factor, chip operation
With critical conduction mode it is adaptable to the input voltage of wide scope.
Compared with prior art, in this Width funtion adjustable LED lamp drive circuit, have the advantage that
1st, the utility model selects inner high voltage by selecting input rectifying filter unit and controllable silicon light modulation compatibility unit
Components and parts are realized, and switch control unit is combined an external mos pipe with regard to energy with the mos pipe of drive control built-in chip type
Realize light modulation action, circuit structure is simple, but the drive control chip because selecting is applied to work under the input voltage of wide scope
Make, no matter thus also ensure that this drive circuit is high pressure in wide range input voltage or low pressure can high-performance stably reality
Now dim.
Brief description
Fig. 1 is circuit block diagram of the present utility model.
Fig. 2 is the circuit diagram of the present embodiment.
In figure, 1, input rectifying filter unit；2nd, controllable silicon light modulation compatibility unit；3rd, dc-dc converter unit；4th, export
Rectification filtering unit；5th, dimming controlling module；51st, feedback of voltage and current sampling unit；52nd, compare amplifying unit；53rd, switch control
Unit processed；F1, fuse；Mov1, piezo-resistance；11st, resistance unit one；21st, resistance unit two；22nd, resistance unit three；54th, sampling electricity
Resistance；R1, resistance one；R2, resistance two；R3, resistance three；R4, resistance four；R5, resistance five；R6, resistance six；R7, resistance seven；r8、
Resistance eight；R9, resistance nine；R10, resistance ten；R11, resistance 11；R12, resistance 12；R13, resistance 13；R14, resistance ten
Four；R15, resistance 15；R16, resistance 16；R17, resistance 17；R18, resistance 18；R19, resistance 19；R20, resistance
20；R21, resistance 21；R22, resistance 22；R23, resistance 23；R24, resistance 24；R25, resistance 20
Five；R26,26；L1, filter inductance one；L2, filter inductance two；L3, filter inductance three；Db1, rectifying tube；C1, filtered electrical
Rong Yi；C2, electric capacity two；C3, electric capacity three；C4, electric capacity four；C5, electric capacity five；C6, electric capacity six；C7, electric capacity seven；C8, electric capacity eight；
Ce1, polar capacitor one；Ce2, polar capacitor two；D1, diode one；D2, Zener diode；D3, diode three；Q1, external
Mos manages；Q2, triode；T1, step-down transformer；U1, drive control chip.
Specific embodiment
The following is specific embodiment of the utility model, and combine accompanying drawing and the technical solution of the utility model is made further
Description, but the utility model is not limited to these embodiments.
As shown in Figure 1-2, this Width funtion adjustable LED lamp drive circuit includes the input rectifying for connecting power input
Filter unit 1 and the output rectification filter unit 4 for connecting led load, power input passes through fuse f1 and pressure-sensitive electricity
Resistance mov1 connects input rectifying filter unit 1, and this drive circuit also includes controllable silicon light modulation compatibility unit 2, dc-dc conversion list
Unit 3 and dimming controlling module 5, input rectifying filter unit 1, controllable silicon light modulation compatibility unit 2, dc-dc converter unit 3 and defeated
Go out rectification filtering unit 4 to be sequentially connected respectively, dimming controlling module 5 includes switch control unit 53, compares amplifying unit 52 and
Feedback of voltage and current sampling unit 51, the output current of feedback of voltage and current sampling unit 51 sampling output rectification filter unit 4
Voltage, and feed back to switch control unit 53, switch control unit 53 output end after comparing amplifying unit 52 to compare amplification
Connect dc-dc converter unit 3.
Input rectifying filter unit 1 includes filter inductance one l1, filter inductance two l2, filter inductance three l3, filter capacitor
One c1, resistance unit 1 and rectifying tube db1, filter inductance one l1 and filter inductance three l3 connect the input of rectifying tube db1 respectively
End, filter capacitor one c1 and resistance unit 2 21 reconnect the output end of rectifying tube db1 after being connected in series, described resistance unit 1
Input series filtering inductance three l3, input rectifying filter unit 1 and controllable silicon light modulation compatibility unit 2 are high internal pressure unit
Part.Here by input rectifying filter unit 1 and controllable silicon light modulation compatibility unit 2 composition components and parts select high internal pressure unit
Part, i.e. filter inductance one l1, filter inductance two l2, filter inductance three l3, filter capacitor one c1, resistance unit 1, rectifying tube
Db1, electric capacity two c2, electric capacity three c3, electric capacity eight c8, resistance unit 2 21 and resistance unit 3 22 all carry out reality from inner high voltage components and parts
Existing.Thus accuse when ensure that wide voltage input will not burn out during voltage, low-voltage can encourage again.Realize the width of 85-265v
Voltage dimming function.And resistance one r1 is connected in parallel on filter inductance one l1, filter inductance two l2 is connected in parallel to resistance two
R2, filter inductance three l3 is connected in parallel to resistance six r6.Resistance unit 1 is resistance three r3, resistance four r4 and resistance five r5
Combine after parallel connection.Resistance unit one 11 series filtering electric capacity one c1 connects rectifying tube db1 output end.
Controllable silicon light modulation compatibility unit 2 includes electric capacity two c2, electric capacity three c3, electric capacity eight c8, resistance unit 2 21 and resistance
Part 3 22, electric capacity two c2 is parallel to the output positive and negative charge of input rectifying filter unit 1, and resistance unit 2 21 is connected with electric capacity three c3
It is parallel to the two ends of electric capacity two c2, resistance unit 3 22 one end connects the output head anode of input rectifying filter unit, electricity after connection
Resistor 3 22 other end connecting valve control unit 53, simultaneously resistance unit 3 22 other end be also connected with electric capacity eight c8 and connect simulation ground
Form loop, resistance unit 2 21 is three parallel resistances, resistance unit 2 21 be resistance seven r7, resistance eight r8 and resistance nine r9 simultaneously
Connection connects combination, and described resistance unit 3 22 is the tandem compound of resistance 11 r11 and resistance 12 r12.Resistance unit 3 22 is two
Individual series resistance, resistance unit 2 21 be resistance seven r7, resistance eight r8 and resistance nine r9 be connected in parallel combination, described resistance unit three
22 is the tandem compound of resistance 11 r11 and resistance 12 r12.This controllable silicon light modulation compatibility unit 2 passes through electric capacity and resistance
Characteristic cut before realizing and after cut the compatibility of light modulator, thus realizing that efficiency of transmission is high, load is minimum be adjustable to 1w within, dim model
Enclose width.It is even more the controllable silicon light modulation lower cost solution for other countries' different in width voltage and open gate.
Switch control unit 53 includes drive control chip u1 and external mos pipe q1, drive control chip u1 internal power
Mos drain electrode connects external mos pipe q1 source electrode, and between drive control chip u1 internal power mos drain electrode and chip power, forward direction connects
Meet diode three d3, the output head anode of input rectifying filter unit 1 is by being sequentially connected in series resistance 13 r13, resistance ten
Four r14 and polar capacitor one ce1 are followed by simulation ground, and the grid of external mos pipe q1 connects electric capacity eight c8 positive pole by resistance 10,
The two ends of electric capacity eight c8 are also connected in parallel to Zener diode d2.The drain electrode of external mos pipe q1 connects dc-dc converter unit 3.This
In pwm impulse modulation realized by power mos within drive control chip u1 leakage and external mos pipe q1 control.Drive control
It is defeated that chip u1 chip power end is connected in series in controllable silicon light modulation compatibility unit 2 by resistance 13 r13 and resistance 14 r14
Go out positive pole.The purpose of stable light modulation is reached in the case of ON-OFF control circuit simplicity.Drive control chip u1 is ct2108 system
Row chip.Ct2108 family chip is the led driving chip of non-isolated high-accuracy and constant flow control.There is high input power factor,
Chip operation and critical conduction mode are it is adaptable to the input voltage of wide scope.Simultaneously drive outside the stabiloity compensation end of control chip u1
Meet electric capacity seven c7 to compensate.
Dc-dc converter unit 3 includes step-down transformer t1 and auxiliary circuit, and auxiliary circuit includes connecting electric capacity four c4, electricity
Hinder ten r10 five and diode one d1, electric capacity four c4 and resistance ten r10 five and be connected in series rear parallel diode one d1, diode one
The output head anode of d1 Opposite direction connection input rectifying filter unit 1 and external mos pipe q1 drain electrode, the primary line of step-down transformer t1
Circle connects external mos pipe q1 drain electrode and output rectification filter unit 4, the secondary coil of step-down transformer t1 and drive control chip
The feedback signal sampling end of u1 and chip ground pin form series loop, and the two ends of the secondary coil of step-down transformer t1 are also in parallel
It is connected with resistance 21 r21 and resistance 22 r22.Here dc-dc converter unit 3 achieves direct current fixed voltage to direct current
The conversion of variable voltage.Dc-dc converter unit 3 is enable according to light modulation demand according to the control adjustment of switch control unit 53
Export constant electric current in input wide-voltage range.Realize high performance stable Width funtion dimming function.Resistance two simultaneously
11 r21 and resistance 22 r22 are parallel to the Serial regulation for electric current for the two ends of the secondary coil of step-down transformer t1.Carry
High dimming behavior.Output rectification filter unit 4 includes polar capacitor two ce2, electric capacity five c5 and is connected in parallel in polar capacitor two
Resistance 16 r16 at ce2 two ends and resistance 17 r17, resistance 16 r16 and resistance 17 r17 indirectly digitally.Resistance ten
Six r16 and resistance 17 r17 are bleed off resistance, for affecting minimum angles light modulation.
The resistance that feedback of voltage and current sampling unit 51 includes triode q2 and connects output rectification filter unit 4 output end
18 r18, resistance 18 r18 are connected in series with resistance 19 r19 and resistance 20 r20, and resistance 20 r20 two ends are parallel with electricity
Hold six c6, resistance 20 r20 two ends are also parallel to base stage and the emitter stage of triode q2, and the colelctor electrode of described triode q2 passes through
Resistance 26 r26 connects drive control chip u1 stabiloity compensation end, and above-mentioned drive control chip u1 current sample end is external
Sampling resistor 54.Sampling resistor is the parallel combination of resistance 25 r25, resistance 24 r24 and resistance 23 r23.This
In by the sampling to output voltage and compare amplifying circuit amplify after feed back to drive control chip u1, simultaneously current sample lead to
The external sampling resistor 54 in control chip u1 current sample end of overdriving is realized.I.e. internal power mos source electrode external sampling electricity
The impact to switch control unit 53 is realized in resistance 54.
On main circuit, Width funtion power supply is conveyed to input rectifying filter unit 1 to the Width funtion entering by power input
Power supply carries out rectifying and wave-filtering, and the smooth direct current electricity after process entered controllable silicon light modulation compatibility unit 2 increases light modulation compatibility.With
When export, to dc-dc converter unit 3, fixing dc source be transformed into variable DC voltage.And dc-dc converter unit 3
Conversion degree is controlled realizing by switch control unit 53.The regulation and control of switch control unit 53 take according to feedback of voltage and current
Sample unit 51 sampling output rectification filter unit 4 output current voltage feeds back signal after comparing amplifying unit 52 to compare amplification
It is controlled.No matter this drive circuit is high pressure in wide range input voltage or low pressure can high-performance stably be realized adjusting
Light.Wherein rectifying tube db1 and external mos pipe q1 selection are by power decision, resistance seven r7 in resistance unit 2 21, resistance eight simultaneously
R8 and resistance nine r9 selects 1-1.5k, and compatibility is more preferably.
Specific embodiment described herein is only explanation for example to the utility model spirit.The utility model institute
Belong to those skilled in the art described specific embodiment can be made with various modifications or supplement or using similar
Mode substitute, but without departing from of the present utility model spirit or surmount scope defined in appended claims.
Claims (7)
1. the adjustable LED lamp drive circuit of a kind of Width funtion, including the input rectifying filter unit (1) for connecting power input
With for connect led load output rectification filter unit (4) it is characterised in that also include controllable silicon light modulation compatibility unit
(2), dc-dc converter unit (3) and dimming controlling module (5), described input rectifying filter unit (1), controllable silicon light modulation are compatible
Property unit (2), dc-dc converter unit (3) and output rectification filter unit (4) are sequentially connected respectively, described dimming controlling module
(5) include switch control unit (53), compare amplifying unit (52) and feedback of voltage and current sampling unit (51), described voltage electricity
The output current voltage of stream feedback sample unit (51) sampling output rectification filter unit (4), and by comparing amplifying unit
(52) feed back to switch control unit (53) after comparing amplification, described switch control unit (53) output end connects dc-dc conversion
Unit (3).
2. the adjustable LED lamp drive circuit of Width funtion according to claim 1 is it is characterised in that described controllable silicon light modulation is simultaneous
Capacitive unit (2) includes electric capacity two (c2), electric capacity three (c3), electric capacity eight (c8), resistance unit two (21) and resistance unit three (22), institute
State the output positive and negative charge that electric capacity two (c2) is parallel to input rectifying filter unit (1), resistance unit two (21) and electric capacity three (c3)
It is parallel to the two ends of electric capacity two (c2), resistance unit three (22) one end connects the defeated of input rectifying filter unit (1) after being connected in series
Go out proper pole, resistance unit three (22) other end connecting valve control unit (53), simultaneously resistance unit three (22) other end be also connected with
Electric capacity eight (c8) and connect artificially generated terrain and become loop, resistance unit two (21) is resistance seven (r7), resistance eight (r8) and resistance nine (r9)
Be connected in parallel combination, described resistance unit three (22) is the series connected combination of resistance 11 (r11) and resistance 12 (r12).
3. the adjustable LED lamp drive circuit of Width funtion according to claim 2 is it is characterised in that described switch control unit
(53) drive control chip (u1) and external mos pipe (q1) are included, described drive control chip (u1) internal power mos drain electrode is even
Connect external mos pipe (q1) source electrode, described drive control chip (u1) internal power mos drain electrode is connected with forward direction between chip power
Diode three (d3), the output head anode of above-mentioned input rectifying filter unit (1) passes through the resistance 13 being sequentially connected in series
(r13), resistance 14 (r14) and polar capacitor one (ce1) are followed by simulation ground, and the grid of described external mos pipe (q1) passes through electricity
Resistance ten (r10) connects electric capacity eight (c8) positive pole, and the drain electrode of described external mos pipe (q1) connects dc-dc converter unit (3).
4. the adjustable LED lamp drive circuit of Width funtion according to claim 3 is it is characterised in that described dc-dc converter unit
(3) step-down transformer (t1) and auxiliary circuit are included, described auxiliary circuit includes connecting electric capacity four (c4), resistance 15 (r15)
With diode one (d1), electric capacity four (c4) and resistance 15 (r15) are connected in series rear parallel diode one (d1), diode one
(d1) output head anode of Opposite direction connection input rectifying filter unit (1) and external mos pipe (q1) drain electrode, described step-down transformer
(t1) primary coil connects external mos pipe (q1) drain electrode and output rectification filter unit (4), described step-down transformer (t1)
Secondary coil forms series loop, step-down transformer with the feedback signal sampling end of drive control chip (u1) and chip ground pin
(t1) two ends of secondary coil are also connected in parallel to resistance 21 (r21) and resistance 22 (r22).
5. the adjustable LED lamp drive circuit of Width funtion according to claim 3 is it is characterised in that described feedback of voltage and current
The resistance 18 (r18) that sampling unit (51) includes triode (q2) and connects output rectification filter unit (4) output end, resistance
18 (r18) are connected in series with resistance 19 (r19) and resistance 20 (r20), and resistance 20 (r20) two ends are parallel with electric capacity six
(c6), resistance 20 (r20) two ends are also parallel to base stage and the emitter stage of triode (q2), the colelctor electrode of described triode (q2)
Drive control chip (u1) stabiloity compensation end, above-mentioned drive control chip (u1) electric current are connected by resistance 26 (r26)
The external sampling resistor of sampling end (54).
6. the adjustable LED lamp drive circuit of Width funtion according to claim 2 is it is characterised in that described input rectifying filters
Unit (1) includes filter inductance one (l1), filter inductance two (l2), filter inductance three (l3), filter capacitor one (c1), resistance unit
One (11) and rectifying tube (db1), described filter inductance one (l1) and filter inductance three (l3) connect the defeated of rectifying tube (db1) respectively
Enter end, described filter capacitor one (c1) and resistance unit two (21) reconnect the output end of rectifying tube (db1) after being connected in series, described
The input series filtering inductance three (l3) of resistance unit one (11), described input rectifying filter unit (1) and controllable silicon light modulation are simultaneous
Capacitive unit (2) is high internal pressure element.
7. the adjustable LED lamp drive circuit of Width funtion according to claim 3 is it is characterised in that described drive control chip
(u1) it is ct2108 family chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620706591.9U CN205912289U (en) | 2016-07-04 | 2016-07-04 | Adjustable LED lamp driving circuit of wide voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620706591.9U CN205912289U (en) | 2016-07-04 | 2016-07-04 | Adjustable LED lamp driving circuit of wide voltage |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107094337A (en) * | 2017-06-30 | 2017-08-25 | 台州市椒光照明有限公司 | A kind of light-operated Width funtion LED lamp drive circuit |
| CN108337789A (en) * | 2018-02-27 | 2018-07-27 | 深圳市晟瑞科技有限公司 | A kind of list firewire light adjusting circuit and light modulating device |
| CN109195259A (en) * | 2018-09-30 | 2019-01-11 | 惠州三华工业有限公司 | Mix light adjusting circuit and light adjusting system |
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