CN106304504A - A kind of off-line type LED drive circuit - Google Patents
A kind of off-line type LED drive circuit Download PDFInfo
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- CN106304504A CN106304504A CN201610872794.XA CN201610872794A CN106304504A CN 106304504 A CN106304504 A CN 106304504A CN 201610872794 A CN201610872794 A CN 201610872794A CN 106304504 A CN106304504 A CN 106304504A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- Dc-Dc Converters (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The present invention proposes a kind of off-line type LED drive circuit, including input module, output module and controller module.It is specifically related to LED illumination and drives field.Mainly employ a boosting TM pfc controller to control input current waveform.This circuit charges as starting using off-line for C6.Once work, the power supply of controller is just provided by the auxiliary winding on a SEPIC inductance.LED ripple current is limited to the 20% of DC electric current by one relatively large output capacitance.Noting, AC electric flux and electric current in TM SEPIC are the highest, need enamelled stranded-wire and low-loss core material to reduce inductor loss.
Description
Technical field
The present invention relates to LED illumination and drive field, be specifically related to a kind of off-line type LED drive circuit.
Background technology
At present, substitute incandescent lamp bulb may also need to the time of several years by practicable formula LED that is threaded into, and
In architectural lighting, the use of LED the most constantly increases, and it has higher reliability and energy-saving potential.Same most of electronic products
Equally, its need a power supply input power is converted to LED can form.In street lamp application, a kind of feasible joining
Put 80 LED connected being to create 300V/0.35 Ampere load.Select power supply topologies time, need formulate isolation and
PFC (PFC) related request.Isolation needs substantial amounts of safe trade study, including providing electric shock protection demand
And the contrast balance complicated between Power Management Design.In this applications, there is high pressure in LED, it is considered that isolation right and wrong must
Need, and PFC be only required.
Summary of the invention
It is an object of the invention to: the problem lacking PFC function for common LED drive circuit set forth above, this
A kind of off-line type LED drive circuit of bright offer.
The technical solution used in the present invention is as follows:
A kind of off-line type LED drive circuit, including input module, output module and controller module.
Further, in described controller module, the VSNS port of described single-chip microcomputer U2 and resistance R8 one end and resistance R16
One end connects, and COMP port is connected with resistance R12 one end and electric capacity C12 one end, and the resistance R12 other end is with electric capacity C10 one end even
Connect, the electric capacity C10 other end and electric capacity C12 other end ground connection, CS port and electric capacity C11 one end, resistance R13 one end and resistance R14
One end connects, the electric capacity C11 other end and resistance R14 other end ground connection, and TIN port connects with resistance R4 one end and resistance R11 one end
Connect, resistance R11 other end ground connection, VCC port and resistance R5 one end, electric capacity C7 one end, resistance R3 one end and diode D3 one end
Connecting, DRV port is connected with mos pipe Q1 base stage, and zcd port passes through electric capacity C9 ground connection, GND port ground connection；
Further, in described output module, the resistance R13 other end is connected with metal-oxide-semiconductor emitter stage and resistance R15 one end,
Resistance R15 other end ground connection, metal-oxide-semiconductor colelctor electrode is connected with electric capacity C1 one end and inductor winding T1 one end, resistance R10 and diode
The D1 other end and inductor winding T1 one end connect, and inductor winding T1 is parallel with electric capacity C1, and end connects diode D1, two poles
The pipe D1 other end is connected with electric capacity C5 positive pole and output interface J1 positive pole, output port J1 negative pole and resistance R6 one end and resistance
R16 one end connects, resistance R6 other end ground connection, inductor winding T1 other end electric capacity C2 one end, resistance R2 one end, resistance R1 one end
Connect, electric capacity C2 other end ground connection.
Further, in described input module, the resistance R2 other end is connected with resistance R5 one end, the resistance R5 other end and electricity
Hold C7 positive pole and resistance R3 one end connects, electric capacity C7 minus earth, the resistance R3 other end and diode U1 positive pole, resistance R7 mono-
End, electric capacity C6 one end and resistance R8 one end connect, and the resistance R8 other end is connected with the resistance R16 other end, the resistance R2 other end and
The resistance R5 other end connects, and the resistance R1 other end is connected with the resistance R4 other end, and diode D2 and resistance R1 one end is connected, two poles
Pipe D2 and electric capacity C4, inductance L1 and electric capacity C3 are in parallel.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
Make LED drive circuit be provided with PFC function, improve drive circuit works efficiency, improve the filtering effect of circuit
Rate.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention；
Detailed description of the invention
All features disclosed in this specification, in addition to mutually exclusive feature and/or step, all can be with any
Mode combines.
Below in conjunction with Fig. 1, the present invention is elaborated.
Substitute incandescent lamp bulb may also need to the time of several years by practicable formula LED that is threaded into, and in building
In illumination, the use of LED the most constantly increases, and it has higher reliability and energy-saving potential.With most of electronic products one
Sample, its need a power supply input power is converted to LED can form.In street lamp application, a kind of feasible configuration
It is the LED of 80 series connection creating 300V/0.35 Ampere load.When selecting power supply topologies, need to formulate isolation and merit
Rate factor correcting (PFC) related request.Isolation need substantial amounts of safe trade study, including provide electric shock protection demand and
Complicate the contrast balance between Power Management Design.In this applications, there is high pressure in LED, it is considered that isolation is nonessential
, and PFC be only required.
For this application, there are three kinds of optional electric source topologies: buck topology, transfer mode opposite topology and transfer mode
(TM) sepic converter (SEPIC) topology.When LED voltage is about 80 volts, buck topology can have very much
It is used for meeting harmonic current requirement to effect.In this case, higher load voltage will be unable to be further continued for using blood pressure lowering to open up
Flutter.So, the method the most more compromised uses opposite topology and SEPIC topology exactly.SEPIC this have the advantage that, it can
Clamp down on the switching waveform of power semiconductor, it is allowed to use relatively low voltage, so that device is highly efficient.In this application
In, it is possible to obtain the efficiency of about 2% improves.It addition, the ring in SEPIC is less, so that EMI filtering is easier to.Fig. 1 shows
Show the schematic diagram of this power supply.
This circuit employs a boosting TM pfc controller to control input current waveform.This circuit fills with off-line for C6
Electricity is as starting.Once work, the power supply of controller is just provided by the auxiliary winding on a SEPIC inductance.One
LED ripple current is limited to the 20% of DC electric current by relatively large output capacitance.Note, the AC in TM SEPIC
Electric flux and electric current are the highest, need enamelled stranded-wire and low-loss core material to reduce inductor loss.
Claims (4)
1. an off-line type LED drive circuit, it is characterised in that include input module, output module and controller module.
Off-line type LED drive circuit the most according to claim 1, it is characterised in that in described controller module, described list
The VSNS port of sheet machine U2 is connected with resistance R8 one end and resistance R16 one end, COMP port and resistance R12 one end and electric capacity C12
One end connects, and the resistance R12 other end is connected with electric capacity C10 one end, the electric capacity C10 other end and electric capacity C12 other end ground connection, CS end
Mouth is connected with electric capacity C11 one end, resistance R13 one end and resistance R14 one end, the electric capacity C11 other end and another termination of resistance R14
Ground, TIN port is connected with resistance R4 one end and resistance R11 one end, resistance R11 other end ground connection, VCC port and resistance R5 mono-
End, electric capacity C7 one end, resistance R3 one end and diode D3 one end connect, and DRV port is connected with mos pipe Q1 base stage, and zcd port leads to
Cross electric capacity C9 ground connection, GND port ground connection.
Off-line type LED drive circuit the most according to claim 1, it is characterised in that in described output module, resistance R13
The other end is connected with metal-oxide-semiconductor emitter stage and resistance R15 one end, resistance R15 other end ground connection, metal-oxide-semiconductor colelctor electrode and electric capacity C1 mono-
End and inductor winding T1 one end connect, and resistance R10 is connected with the diode D1 other end and inductor winding T1 one end, inductor winding T1
On be parallel with electric capacity C1, end connects diode D1, the diode D1 other end and electric capacity C5 positive pole and output interface J1 positive pole
Connecting, output port J1 negative pole is connected with resistance R6 one end and resistance R16 one end, resistance R6 other end ground connection, inductor winding T1
Other end electric capacity C2 one end, resistance R2 one end, resistance R1 one end connect, electric capacity C2 other end ground connection.
Off-line type LED drive circuit the most according to claim 1, it is characterised in that in described input module, resistance R2 is another
One end is connected with resistance R5 one end, and the resistance R5 other end is connected with electric capacity C7 positive pole and resistance R3 one end, electric capacity C7 minus earth,
The resistance R3 other end is connected with diode U1 positive pole, resistance R7 one end, electric capacity C6 one end and resistance R8 one end, the resistance R8 other end
Being connected with the resistance R16 other end, the resistance R2 other end is connected with the resistance R5 other end, the resistance R1 other end and the resistance R4 other end
Connecting, diode D2 and resistance R1 one end is connected, and diode D2 and electric capacity C4, inductance L1 and electric capacity C3 are in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610872794.XA CN106304504A (en) | 2016-09-30 | 2016-09-30 | A kind of off-line type LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610872794.XA CN106304504A (en) | 2016-09-30 | 2016-09-30 | A kind of off-line type LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106304504A true CN106304504A (en) | 2017-01-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610872794.XA Pending CN106304504A (en) | 2016-09-30 | 2016-09-30 | A kind of off-line type LED drive circuit |
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| CN201830521U (en) * | 2010-10-19 | 2011-05-11 | 天津光电通信技术有限公司 | Offline type high-power LED (light-emitting diode) constant-current drive power supply |
| CN201830503U (en) * | 2010-08-18 | 2011-05-11 | 杭州和而泰智能控制技术有限公司 | Flyback single-stage power factor correction light-emitting diode (LED) driving power supply |
| CN201839477U (en) * | 2010-05-19 | 2011-05-18 | 成都芯源系统有限公司 | LED drive circuit and lamp |
| CN102333406A (en) * | 2011-10-31 | 2012-01-25 | 中国科学院自动化研究所 | Light-emitting diode (LED) driver for illumination |
| US20120112648A1 (en) * | 2010-11-08 | 2012-05-10 | Suresh Hariharan | Electronic Transformer Compatibility for Light Emitting Diode Systems |
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| US20140300274A1 (en) * | 2011-12-16 | 2014-10-09 | Beniamin Acatrinei | Near unity power factor long life low cost led lamp retrofit system and method |
| CN204652716U (en) * | 2015-02-15 | 2015-09-16 | 深圳市天绿地节能环保科技有限公司 | A kind of powerful two-stage LED drive power |
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| CN201839477U (en) * | 2010-05-19 | 2011-05-18 | 成都芯源系统有限公司 | LED drive circuit and lamp |
| CN201830503U (en) * | 2010-08-18 | 2011-05-11 | 杭州和而泰智能控制技术有限公司 | Flyback single-stage power factor correction light-emitting diode (LED) driving power supply |
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| US20120112648A1 (en) * | 2010-11-08 | 2012-05-10 | Suresh Hariharan | Electronic Transformer Compatibility for Light Emitting Diode Systems |
| CN102333406A (en) * | 2011-10-31 | 2012-01-25 | 中国科学院自动化研究所 | Light-emitting diode (LED) driver for illumination |
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| US20140300274A1 (en) * | 2011-12-16 | 2014-10-09 | Beniamin Acatrinei | Near unity power factor long life low cost led lamp retrofit system and method |
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| CN204652716U (en) * | 2015-02-15 | 2015-09-16 | 深圳市天绿地节能环保科技有限公司 | A kind of powerful two-stage LED drive power |
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Application publication date: 20170104 |