CN204191008U - A kind of simple and easy high PFC framework controllable silicon light modulation LED drive power - Google Patents

A kind of simple and easy high PFC framework controllable silicon light modulation LED drive power Download PDF

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CN204191008U
CN204191008U CN201420707074.4U CN201420707074U CN204191008U CN 204191008 U CN204191008 U CN 204191008U CN 201420707074 U CN201420707074 U CN 201420707074U CN 204191008 U CN204191008 U CN 204191008U
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circuit
drived control
resistance
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方彬辉
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FOSHAN TOPDAY PHOTOELECTRIC SCIENCE & TECHNOLOGY Co Ltd
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FOSHAN TOPDAY PHOTOELECTRIC SCIENCE & TECHNOLOGY Co Ltd
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Abstract

The utility model discloses a kind of simple and easy high PFC framework controllable silicon light modulation LED drive power, comprise the input rectifying filter circuit connected successively, transformer, output rectifier and filter, also comprise drived control IC, start-up circuit, silicon controlled thyristor detecting circuit, network building out circuit, linear voltage-stabilizing circuit and power switch pipe, described input rectifying filter circuit connects described start-up circuit, described start-up circuit connects described drived control IC, described drived control IC controls power switch pipe, described power switch pipe connection transformer primary coil, described transformer ancillary coil connecting linear voltage stabilizing circuit, described linear voltage-stabilizing circuit connects drived control IC, silicon controlled thyristor detecting circuit connects input rectifying filter circuit and network building out circuit, described network building out circuit connects drived control IC, the utility model circuit is simple, with low cost, the light modulation linearity is good, scintillation can not be produced, there is very high conversion efficiency and economic benefit.

Description

A kind of simple and easy high PFC framework controllable silicon light modulation LED drive power
Technical field
The present invention relates to a kind of controllable silicon light modulation LED drive power, be specifically related to a kind of simple and easy high PFC framework controllable silicon light modulation LED drive power.
Background technology
In the face of the problem of global energy anxiety, how seeming particularly important by the utilance of the high-tech raising energy, according to statistics, illumination accounts for about 20% of world's total energy consumption, so reducing lighting energy consumption is the emphasis that society pays close attention to always.The series of advantages such as LED illumination has good color rendering, light efficiency is high, operating voltage is low, long service life, energy-saving safe, LED illumination certainly will will replace incandescent lighting completely.
LED light modulation has more excellent energy conservation characteristic, is applicable to the requirement of people to illuminating effect and the demand of environmental protection, utilizes LED lighting dimming can make comfortable lighting environment and special illuminating effect.But LED light source directly can not can use utility grid voltage as general light source, it must be furnished with special conversion equipment, the rated voltage and electric current that can meet driving LED are provided, LED just can be made normally to work, Here it is the special driving power of so-called LED.Current controllable silicon light modulation LED drive power circuit will realize High Power Factor, light modulation flicker free, the light modulation linearity is good, dimming resolution is high, strong to the compatibility of dimmer, meet the requirement of people to lighting space visual effect, just must add a lot of circuit, such as complicated active leadage circuit, active damping circuit, dynamically leadage circuit, opto-coupled feedback circuit, constant-current circuit, fill out the circuit such as paddy circuit, the phased angle detection circuit of light modulation, so need now design one to meet above-mentioned requirements, and simple LED drive power of circuit.
Summary of the invention
The object of the present invention is to provide a kind of High Power Factor, light modulation flicker free, the light modulation linearity be good, dimming resolution is high, the simple controllable silicon light modulation LED drive power strong to the compatibility of dimmer.
For achieving the above object, the invention provides a kind of simple and easy high PFC framework controllable silicon light modulation LED drive power, comprise the input rectifying filter circuit, transformer and the output rectifier and filter that connect successively, also comprise drived control IC, start-up circuit, silicon controlled thyristor detecting circuit, network building out circuit, linear voltage-stabilizing circuit and power switch pipe; Described input rectifying filter circuit connects described start-up circuit, and described start-up circuit connects described drived control IC, and described drived control IC controls power switch pipe, described power switch pipe connection transformer primary coil; Described transformer ancillary coil connecting linear voltage stabilizing circuit, described linear voltage-stabilizing circuit connects drived control IC; Described silicon controlled thyristor detecting circuit connects input rectifying filter circuit and network building out circuit, and described network building out circuit connects described drived control IC; Described silicon controlled thyristor detecting circuit and network building out circuit, for adjusting drived control IC, make drived control IC keep steady operation, and make described LED drive power can be used in controllable silicon light modulation; Described linear voltage-stabilizing circuit guarantees that described drived control IC maintains normal operating state when controllable silicon light modulation is along with input voltage and output voltage curent change; Described drived control IC for detecting the electric current of described transformer, and for detecting the zero crossing current discharge time of described transformer ancillary coil; Described drived control IC inside is provided with the computing circuit detecting in real time and export average current.
The present invention adopts digital power control technology, switch On time under input voltage and load is designed to revocable, it is made to operate in critical conduction mode, so its switching frequency is not fixing, pass through such scheme, no matter there is any change in input voltage and output current, and drived control IC by adjustment On time, can ensure to export average current constant.In half-sinusoid, as long as ON time is constant, peak current will be linear with input voltage, so the mean value of IP also will be sinusoidal wave, product is made to have High Power Factor (PF > 0.9), high efficiency (efficiency > 85%), low harmony wave (harmonic content is lower than 20%), when making LED light modulation, LED drive power when not connecing dimmer or connect dimmer power factor PF value all up to 0.9, when particularly connecing dimmer for light control, when dimmer is transferred to minimum current (LED lamp minimum brightness), power factor is still up to 0.9, and harmonic content is very low, network building out circuit in above-mentioned provides a bias voltage to maintain the stability of loop and to make driving power of the present invention obtain higher power factor.
Further, described transformer is isolating transformer or non-isolated transformer, and during use isolating transformer, output is Secure isolation, and can directly catch tactile LED, can not produce electric shock, improve the safe application performance of circuit; Use during non-isolated transformer and there is the advantage that cost is low, efficiency is high.
Further, described silicon controlled thyristor detecting circuit comprises the resistance R1 be connected in series, R2, R3, described network building out circuit comprises resistance R18, diode D3, electric capacity C1, C2, the negative pole of diode D3 is connected to resistance R2, between R3, positive pole connects the COMP pin of described drived control IC, between the COMP pin that described resistance R18 is connected to described drived control IC and linear voltage-stabilizing circuit, described electric capacity C2 mono-end is connected on diode D3 negative pole, other end ground connection, described electric capacity C3 mono-end is connected on diode D3 positive pole, other end ground connection, described diode D3 can isolate the current potential in silicon controlled thyristor detecting circuit, the constant voltage that described network building out circuit makes the maintenance of the COMP pin of described drived control IC be not less than 0.7V carrys out constant on-time and stability contorting loop.
When thyristor regulating light can there is certain change along with the height of the voltage of dimmer in the current potential of the negative pole of diode D3, particularly when inputting low-voltage dimmer and being transferred to low side, the current potential of the negative pole of diode D3 can become very low, and at this moment resistance R18 provides a bias voltage to maintain the stability of loop and to obtain higher power factor can to the COMP pin of drived control IC.
Further, described input rectifying filter circuit comprises the EMI filter circuit, input rectification circuit, the passive leadage circuit that connect successively, and described passive leadage circuit comprises resistance RA and electric capacity CB2, and described resistance RA and electric capacity CB2 is connected in series.Described passive leadage circuit guarantees that initial input current amount is enough to meet silicon controlled minimal maintenance current requirements, particularly when thyristor operating angle is large not, correct zero-crossing examination is carried out to AC input, this plays very large effect for the correct light modulation work of maintenance, relative to active leadage circuit, passive leadage circuit is simple, and reliability is high also can save cost.
Further, described start-up circuit comprises the resistance R27 be connected in series, R28, resistance R27, the two ends of R28 connect the VCC pin of described passive leadage circuit and drived control IC respectively, the start-up circuit that resistance R27 and R28 forms is general start-up circuit, present invention also offers a kind of high-voltage high-speed start-up circuit, described high-voltage high-speed start-up circuit comprises diode D6, D7 and resistance R6, R7, diode D6, the positive pole of D7 is connected on the two ends of EMI filter circuit respectively, diode D6, the resistance R6 of series connection is connected after the negative pole of D7 connects, R7, the other end of resistance R7 connects the VCC pin of drived control IC, described high-voltage high-speed start-up circuit can realize starting drived control IC fast, make be less than 0.3S the start-up time of drived control IC.
Further, described linear voltage-stabilizing circuit comprises triode Q2, voltage stabilizing didoe ZD1, resistance R13, the base stage of described triode Q2 connects the negative pole of described voltage stabilizing didoe ZD1, described resistance R13 two ends connect base stage and the collector electrode of described triode Q2 respectively, the emitter of described triode Q2 connects the VCC pin of described drived control IC, the plus earth of described voltage stabilizing didoe ZD1, when described input voltage and output voltage curent change, described linear voltage-stabilizing circuit can maintain the state that drived control IC is in normal work always.
Further, described transformer connects the drain electrode of described power switch pipe, ground connection after the source electrode connection sampling resistor RS1 of described power switch pipe, the CS pin of described drived control IC connects described sampling resistor RS1, the electric current of the CS pin senses transformer of described drived control IC;
The ZCD pin of described drived control IC connects described transformer ancillary coil, described transformer ancillary coil other end ground connection, the ZCD pin senses transformer ancillary coil current discharge time of described drived control IC.
Further, the present invention also comprises expansion circuit, described expansion circuit comprises resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, the CS pin of described drived control IC connects described resistance R21, between the DRV pin that described resistance R20 is connected to described drived control IC and resistance R21, between the CS pin that described resistance R22 is connected to described drived control IC and linear voltage-stabilizing circuit, between the VCC pin that described resistance R23 is connected to described drived control IC and linear voltage-stabilizing circuit, between the DRV pin that described resistance R24 is connected to described drived control IC and the grid of power switch pipe, between the VCC pin that described resistance R25 is connected to described drived control IC and the grid of power switch pipe, above-mentioned six resistance can carry out the combination of short circuit and open circuit, such as resistance R21, resistance R23 and resistance R24 short circuit, other three resistive-opens, this combination can for a certain class drived control IC, change short circuit and the open circuit of resistance, go for again the drived control IC of other types, expansion circuit of the present invention can improve the compatibility of circuit as can be seen here, expand range of application of the present invention, use not by too much constraint.
Compared with prior art, the present invention is based on single-stage PFC framework, modulus conversion technique and digital power control technology, simple and reasonable, there is the characteristics such as high PFC, low THD, precisely constant current, and circuit working is in quasi-resonant mode, saves active leadage circuit popular in the market, active damping circuit, dynamically leadage circuit, opto-coupled feedback circuit, constant-current circuit, fill out the circuit such as paddy circuit, the phased angle detection circuit of light modulation; The linearity of light modulation of the present invention is good, scintillation can not be produced, there is very high conversion efficiency, but also most controllable silicon dimmers that can be compatible popular on the market, greatly can improve the useful life of LED lamp, reduce the holistic cost of LED lamp, have very high economic worth and social benefit.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the isolated LED drive power of the present invention;
Fig. 2 is the circuit theory diagrams of the non-isolated LED drive power of the present invention;
Fig. 3 is the circuit theory diagrams that LED drive power of the present invention adopts general start-up circuit;
Fig. 4 is the circuit theory diagrams of expansion type LED drive power of the present invention;
Fig. 5 is circuit block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, detailed introduction is done to the present invention.
The invention provides a kind of simple and easy high PFC framework controllable silicon light modulation LED drive power, comprise the input rectifying filter circuit, transformer and the output rectifier and filter that connect successively, also comprise start-up circuit, silicon controlled thyristor detecting circuit, network building out circuit, the LED drived control IC with former limit feedback PSR easy structure, linear voltage-stabilizing circuit and power switch pipe, described input rectifying filter circuit filtering exchanges the interference signal in input electricity, and alternating current is converted to direct current.
Described input rectifying filter circuit connects the VCC pin of described drived control IC by start-up circuit, the DRV pin of described drived control IC connects the grid of described power switch pipe, the drain electrode of described power switch pipe connects described transformer, described transformer ancillary coil is connected described linear voltage-stabilizing circuit by resistance R12 with diode D2, described transformer ancillary coil connects the ZCD pin of described drived control IC by resistance R11, described linear voltage-stabilizing circuit output connects the VCC pin of described drived control IC, described silicon controlled thyristor detecting circuit connects described input rectifying filter circuit and described network building out circuit, described network building out circuit connects described drived control IC, described silicon controlled thyristor detecting circuit and network building out circuit are for adjusting drived control IC, drived control IC is made to keep steady operation, and make described LED drive power for controllable silicon light modulation, network building out circuit provides a bias voltage to maintain the stability of loop and to make driving power obtain higher power factor, described linear voltage-stabilizing circuit is guaranteed when controllable silicon light modulation is along with input voltage and output voltage curent change, described drived control IC maintains normal operating state, described drived control IC is for detecting the electric current of described transformer, and for detecting the zero crossing current discharge time of described transformer ancillary coil, described drived control IC inside is provided with the computing circuit detecting in real time and export average current.
Transformer in above-mentioned has following two kinds of modes:
First kind of way: described transformer is non-isolated converter, and primary coil is equivalent to inductance, the operating efficiency of the LED drive power of this mode is high, and cost is low;
The second way: described transformer is isolating transformer, now output is Secure isolation, LED can directly catch tactile, electric shock can not be produced, when adopting isolating transformer, isolating transformer is connected with peak absorbing loop, described peak absorbing loop comprises the resistance R9 be connected in parallel, resistance R10, electric capacity C1, after in parallel, one end connects the negative pole of diode D1, the other end connects described passive leadage circuit, the positive pole of diode D1 connects the drain electrode of described power switch pipe, peak absorbing loop mainly absorbs the due to voltage spikes that when switching tube Q1 turns off, transformer leakage inductance causes.
Described transformer connects the drain electrode of described power switch pipe, ground connection after the source electrode connection sampling resistor RS1 of described power switch pipe, the CS pin of described drived control IC connects sampling resistor RS1 through resistance R16, the CS pin of drived control IC is by electric capacity C5 ground connection, C5 and R16 can eliminate the peak voltage of CS pin, the electric current of the CS pin senses transformer of described drived control IC; The ZCD pin of described drived control IC connects ancillary coil by resistance R11, the ZCD pin senses ancillary coil zero crossing current discharge time of described drived control IC, described drived control IC inside is provided with the computing circuit detecting in real time and export average current, guarantees the constant of output current.The present invention adopts digital power control technology, switch On time under input voltage and load is designed to revocable, it is made to operate in critical conduction mode, so its switching frequency is not fixing, pass through such scheme, no matter there is any change in input voltage and output current, and drived control IC by adjustment On time, can ensure to export average current constant.Research according to inventor finds, in half-sinusoid, as long as ON time is constant, peak current will be linear with input voltage, so the mean value of IP also will be sinusoidal wave, product is made to have High Power Factor (PF > 0.9), high efficiency (efficiency > 85%), low harmony wave (harmonic content is lower than 20%), when making LED light modulation, LED drive power when not connecing dimmer or connect dimmer power factor PF value all up to 0.9, when particularly connecing dimmer for light control, when dimmer is transferred to minimum current (LED lamp minimum brightness), power factor is still up to 0.9, and harmonic content is very low.
Above-mentioned silicon controlled thyristor detecting circuit comprises the resistance R1 be connected in series, R2, R3, described network building out circuit comprises resistance R18, diode D3, electric capacity C1, C2, the negative pole of diode D3 is connected to resistance R2, between R3, positive pole connects the COMP pin of described drived control IC, between the COMP pin that described resistance R18 is connected to described drived control IC and linear voltage-stabilizing circuit, described electric capacity C2 mono-end is connected on diode D3 negative pole, other end ground connection, described electric capacity C3 mono-end is connected on diode D3 positive pole, other end ground connection, described diode D3 plays the Electricity Functional in isolation silicon controlled thyristor detecting circuit, described silicon controlled thyristor detecting circuit makes driving power have controllable silicon light modulation function, the constant voltage that described network building out circuit makes the maintenance of the COMP pin of described drived control IC be not less than 0.7V carrys out constant on-time and stability contorting loop.
When thyristor regulating light can there is certain change along with the height of the voltage of dimmer in the current potential of the negative pole of diode D3, particularly when inputting low-voltage dimmer and being transferred to low side, the current potential of the negative pole of diode D3 can become very low, and at this moment resistance R18 provides a bias voltage to maintain the stability of loop and to obtain higher power factor can to the COMP pin of drived control IC.
Described input rectifying filter circuit comprises the EMI filter circuit connected successively, input rectification circuit, passive leadage circuit, described passive leadage circuit comprises resistance RA and electric capacity CB2, described resistance RA and electric capacity CB2 is connected in series, described passive leadage circuit guarantees that initial input current amount is enough to meet silicon controlled minimal maintenance current requirements, particularly when thyristor operating angle is large not, correct zero-crossing examination is carried out to AC input, this plays very large effect for the correct light modulation work of maintenance, relative to active leadage circuit, passive leadage circuit is simple, reliability is high also can save cost.
Described start-up circuit can be general start-up circuit, comprise resistance R27, R28 of being connected in series, resistance R27, R28 two ends connect the VCC pin of described passive leadage circuit and described drived control IC respectively, described start-up circuit can also be high-voltage high-speed start-up circuit, described high-voltage high-speed start-up circuit comprises diode D6, D7 and resistance R6, R7, the positive pole of diode D6, D7 is connected on the two ends of EMI filter circuit respectively, connect resistance R6, R7 of series connection after the negative pole of diode D6, D7 connects, the other end of resistance R7 connects drived control IC.Described high-voltage high-speed start-up circuit can realize starting drived control IC fast, makes be less than 0.3S the start-up time of drived control IC.
Described linear voltage-stabilizing circuit comprises triode Q2, voltage stabilizing didoe ZD1, resistance R13, the base stage of described triode Q2 connects the negative pole of described voltage stabilizing didoe ZD1, described resistance R13 two ends connect base stage and the collector electrode of described triode Q2 respectively, the emitter of described triode Q2 connects the VCC pin of described drived control IC, the plus earth of described voltage stabilizing didoe ZD1, when described input voltage and output voltage curent change, described linear voltage-stabilizing circuit can maintain the state that drived control IC is in normal work always.
The present invention also comprises expansion circuit, described expansion circuit comprises resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, the CS pin of described drived control IC connects described resistance R21, between the DRV pin that described resistance R20 is connected to described drived control IC and resistance R21, between the CS pin that described resistance R22 is connected to described drived control IC and linear voltage-stabilizing circuit, between the VCC pin that described resistance R23 is connected to described drived control IC and linear voltage-stabilizing circuit, between the DRV pin that described resistance R24 is connected to described drived control IC and the grid of power switch pipe, between the VCC pin that described resistance R25 is connected to described drived control IC and the grid of power switch pipe, above-mentioned six resistance can carry out the combination of short circuit and open circuit, such as resistance R21, resistance R23 and resistance R24 short circuit, other three resistive-opens, this combination can for a certain class drived control IC, change short circuit and the open circuit of resistance, go for again the drived control IC of other types, expansion circuit of the present invention can improve the compatibility of circuit as can be seen here, expand range of application of the present invention, use not by too much constraint.
The VCC pin of the drived control IC adopted during the present invention specifically implements is the power supply link of chip, GND pin is chip ground end, DRV pin is drive singal transmission ends, ZCD pin is zero current detection end, the present invention is for detecting the zero crossing current discharge time of transformer ancillary coil, CS pin is current detecting end, the present invention is for detecting the electric current of transformer, COMP pin is that voltage comparator connects, certainly, except the driving chip of this type, functionally similar other drived control IC also can be adopted to replace; Dotted line frame 11,21,31,41 in Fig. 1 of the present invention, 2,3,4 is passive leadage circuit, dotted line frame 12,22,32,42 is silicon controlled thyristor detecting circuit, dotted line frame 13,23,33,43 is network building out circuit, and dotted line frame 14,24,34,44 is linear voltage-stabilizing circuit.
Compared with prior art, the present invention is based on single-stage PFC framework, modulus conversion technique and digital power control technology, simple and reasonable, there is the characteristics such as high PFC, low THD, precisely constant current, and circuit working is in quasi-resonant mode, saves active leadage circuit popular in the market, active damping circuit, dynamically leadage circuit, opto-coupled feedback circuit, constant-current circuit, fill out the circuit such as paddy circuit, the phased angle detection circuit of light modulation; The linearity of light modulation of the present invention is good, can not produce scintillation, have very high conversion efficiency, but also most controllable silicon dimmers that can be compatible popular on the market, greatly can improve the useful life of LED lamp, reduce the holistic cost of LED lamp, have very high economic worth and social benefit.
The announcement of book and instruction according to the above description, the technical staff in field of the present invention can also change above-mentioned execution mode and revise.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.

Claims (10)

1. a simple and easy high PFC framework controllable silicon light modulation LED drive power, it is characterized in that, comprise the input rectifying filter circuit, transformer and the output rectifier and filter that connect successively, also comprise drived control IC, start-up circuit, silicon controlled thyristor detecting circuit, network building out circuit, linear voltage-stabilizing circuit and power switch pipe; Described input rectifying filter circuit connects described start-up circuit, and described start-up circuit connects described drived control IC, and described drived control IC controls power switch pipe, described power switch pipe connection transformer primary coil; Described transformer ancillary coil connecting linear voltage stabilizing circuit, described linear voltage-stabilizing circuit connects drived control IC; Described silicon controlled thyristor detecting circuit connects input rectifying filter circuit and network building out circuit, and described network building out circuit connects described drived control IC; Described silicon controlled thyristor detecting circuit and network building out circuit, for adjusting drived control IC, make drived control IC keep steady operation, and make described LED drive power can be used in controllable silicon light modulation; Described linear voltage-stabilizing circuit guarantees that described drived control IC maintains normal operating state when controllable silicon light modulation is along with input voltage and output voltage curent change; Described drived control IC for detecting the electric current of described transformer, and for detecting the zero crossing current discharge time of described transformer ancillary coil; Described drived control IC inside is provided with the computing circuit detecting in real time and export average current.
2. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 1, it is characterized in that, described transformer is isolating transformer or non-isolated transformer.
3. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 1 and 2, it is characterized in that, described silicon controlled thyristor detecting circuit comprises the resistance R1 be connected in series, R2, R3, described network building out circuit comprises resistance R18, diode D3, electric capacity C1, C2, the negative pole of diode D3 is connected to resistance R2, between R3, positive pole connects the COMP pin of described drived control IC, between the COMP pin that described resistance R18 is connected to described drived control IC and linear voltage-stabilizing circuit, described electric capacity C2 mono-end is connected on diode D3 negative pole, other end ground connection, described electric capacity C3 mono-end is connected on diode D3 positive pole, other end ground connection, described diode D3 can isolate the current potential in silicon controlled thyristor detecting circuit, described network building out circuit makes the COMP pin of described drived control IC maintain to be not less than constant voltage and to carry out constant on-time and stability contorting loop.
4. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 3, it is characterized in that, the voltage that described network building out circuit makes the maintenance of the COMP pin of described drived control IC be not less than 0.7V carrys out constant on-time and stability contorting loop.
5. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 1 and 2, it is characterized in that, described input rectifying filter circuit comprises the EMI filter circuit, input rectification circuit, the passive leadage circuit that connect successively, described passive leadage circuit comprises resistance RA and electric capacity CB2, and described resistance RA and electric capacity CB2 is connected in series.
6. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 5, it is characterized in that, described start-up circuit comprises resistance R27, R28 of being connected in series, and the two ends of resistance R27, R28 connect the VCC pin of described passive leadage circuit and drived control IC respectively.
7. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 5, it is characterized in that, described start-up circuit is high-voltage high-speed start-up circuit, described high-voltage high-speed start-up circuit comprises diode D6, D7 and resistance R6, R7, diode D6, the positive pole of D7 is connected on the two ends of EMI filter circuit respectively, diode D6, the resistance R6 be connected in series is connected after the negative pole of D7 connects, R7, the other end of resistance R7 connects the VCC pin of drived control IC, described high-voltage high-speed start-up circuit can realize starting drived control IC fast, the start-up time of drived control IC is less than 0.3S.
8. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 1 and 2, it is characterized in that, described linear voltage-stabilizing circuit comprises triode Q2, voltage stabilizing didoe ZD1, resistance R13, the base stage of described triode Q2 connects the negative pole of described voltage stabilizing didoe ZD1, described resistance R13 two ends connect base stage and the collector electrode of described triode Q2 respectively, the emitter of described triode Q2 connects the VCC pin of described drived control IC, the plus earth of described voltage stabilizing didoe ZD1.
9. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 1 and 2, it is characterized in that, described transformer connects the drain electrode of described power switch pipe, ground connection after the source electrode connection sampling resistor RS1 of described power switch pipe, the CS pin of described drived control IC connects described sampling resistor RS1, the electric current of the CS pin senses transformer of described drived control IC;
The ZCD pin of described drived control IC connects described transformer ancillary coil, described transformer ancillary coil other end ground connection, the ZCD pin senses transformer ancillary coil current discharge time of described drived control IC.
10. simple and easy high PFC framework controllable silicon light modulation LED drive power according to claim 1 and 2, it is characterized in that, also comprise expansion circuit, described expansion circuit comprises resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, the CS pin of described drived control IC connects described resistance R21, between the DRV pin that described resistance R20 is connected to described drived control IC and resistance R21, between the CS pin that described resistance R22 is connected to described drived control IC and linear voltage-stabilizing circuit, between the VCC pin that described resistance R23 is connected to described drived control IC and linear voltage-stabilizing circuit, between the DRV pin that described resistance R24 is connected to described drived control IC and the grid of power switch pipe, between the VCC pin that described resistance R25 is connected to described drived control IC and the grid of power switch pipe.
CN201420707074.4U 2014-11-21 2014-11-21 A kind of simple and easy high PFC framework controllable silicon light modulation LED drive power Withdrawn - After Issue CN204191008U (en)

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* Cited by examiner, † Cited by third party
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CN104378888A (en) * 2014-11-21 2015-02-25 佛山冠今光电科技有限公司 Simple silicon-controlled dimming LED driving power supply with high-PFC structure
CN109089359A (en) * 2018-08-22 2018-12-25 江苏优为视界科技有限公司 A kind of SCM Based fluorescent lamp automatic light modulation device
CN110753422A (en) * 2019-10-19 2020-02-04 浙江凯耀照明有限责任公司 Quick start circuit applied to operational amplifier building

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104378888A (en) * 2014-11-21 2015-02-25 佛山冠今光电科技有限公司 Simple silicon-controlled dimming LED driving power supply with high-PFC structure
CN109089359A (en) * 2018-08-22 2018-12-25 江苏优为视界科技有限公司 A kind of SCM Based fluorescent lamp automatic light modulation device
CN110753422A (en) * 2019-10-19 2020-02-04 浙江凯耀照明有限责任公司 Quick start circuit applied to operational amplifier building
CN110753422B (en) * 2019-10-19 2021-12-03 浙江凯耀照明有限责任公司 Quick start circuit applied to operational amplifier building

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