CN107396492B - Led drive circuit - Google Patents
Led drive circuit Download PDFInfo
- Publication number
- CN107396492B CN107396492B CN201710587028.3A CN201710587028A CN107396492B CN 107396492 B CN107396492 B CN 107396492B CN 201710587028 A CN201710587028 A CN 201710587028A CN 107396492 B CN107396492 B CN 107396492B
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- Prior art keywords
- diode
- parallel
- circuit
- resistor
- electronic transformer
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Classifications
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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
-
- 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]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of LED drive circuits, it includes load etc., it loads in parallel with first capacitor, first inductance, the 5th diode, second resistance and 3rd resistor series connection, first diode and third diode, the 4th diodes in parallel, first diode is in parallel with 12V AC power source, second diode is in parallel with 12V AC power source, switch driving circuit is in parallel with electronic transformer compatible circuit, electronic transformer compatible circuit is in parallel with power factor correction circuit, first resistor is in parallel with electronic transformer compatible circuit, and switch driving circuit is in parallel with 3rd resistor.Compact of the present invention is greatly improved using stabilization and is promoted PFC, promotes the compatibility to ET, promotes dimming characteristic, and system application integrating reduces peripheral components, reduces costs simultaneously.
Description
Technical field
The present invention relates to a kind of circuits, more particularly to a kind of LED (light emitting diode) driving circuit.
Background technique
With the development of current electronic technology and electronic industry, LED illumination device has been widely used in people's
The advantages that in life and production, while LED illumination device is because of its low energy consumption, environmental protection, easy to control, before there is fabulous market
Scape.But currently, for LED technically there are still some drawbacks not fully up to expectations, traditional LED drives electricity in lighting area
Road is only capable of taking the compatibility to ET (electronic transformer) into account, it is impossible to be used in PFC (Power Factor Correction, power because
Number correction).
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of LED drive circuit, compact, using stabilization, greatly
It improves greatly and promotes PFC (Power Factor Correction, PFC), promote the compatibility to ET, promoted and adjusted
Light characteristic, system application integrating reduce peripheral components, reduce costs simultaneously.
The present invention is to solve above-mentioned technical problem by following technical proposals: a kind of LED drive circuit comprising negative
Load, switch driving circuit, electronic transformer compatible circuit, power factor correction circuit, 12V AC power source, the first inductance, first
Capacitor, the first triode, first resistor, second resistance, 3rd resistor, first diode, the second diode, third diode,
4th diode, the 5th diode load, first inductance, fiveth diode, second resistance and third electricity in parallel with first capacitor
Resistance series connection, first diode and third diode, the 4th diodes in parallel, first diode is in parallel with 12V AC power source, and second
Diode is in parallel with 12V AC power source, and switch driving circuit is in parallel with electronic transformer compatible circuit, the compatible electricity of electronic transformer
Road is in parallel with power factor correction circuit, and first resistor is in parallel with electronic transformer compatible circuit, switch driving circuit and third
Resistor coupled in parallel.
Preferably, the switch driving circuit is realized by booster circuit, passes through second resistance, 3rd resistor perception output electricity
It presses and feedback signal is to operational amplifier, maintain the output of system steady operation.
Preferably, the electronic transformer compatible circuit perceives peak to peak value electricity by the voltage at detection first resistor both ends
Stream maintains prime electronic transformer to stablize output services.
Preferably, the power factor correction circuit during trough by controlling and adjusting its peak to peak electric current, so that system
Input current is closer to sine wave.
The positive effect of the present invention is that: compact of the present invention is greatly improved using stabilization and is promoted PFC
(Power Factor Correction, PFC) promotes the compatibility to ET, promotes dimming characteristic, system application
Integration reduces peripheral components, reduces costs simultaneously.
Detailed description of the invention
Fig. 1 is basic circuit structure schematic diagram of the invention.
Specific embodiment
Present pre-ferred embodiments are provided with reference to the accompanying drawing, in order to explain the technical scheme of the invention in detail.
As shown in Figure 1, LED drive circuit of the present invention includes load A1, switch driving circuit B1, the compatible electricity of electronic transformer
Road E1, power factor correction circuit F1,12V AC power source, the first inductance L1, first capacitor C1, the first triode Q1, the first electricity
Hinder R1, second resistance R2,3rd resistor R3, first diode D1, the second diode D2, third diode D3, the 4th diode
D4, the 5th diode D5, load A1 is in parallel with first capacitor C1, the first inductance L1, the 5th diode D5, second resistance R2 and the
Three resistance R3 series connection, first diode D1 and third diode D3, the 4th diodes in parallel D4, first diode D1 and 12V are handed over
Power sources in parallel is flowed, the second diode D2 is in parallel with 12V AC power source, switch driving circuit B1 and electronic transformer compatible circuit E1
Parallel connection, electronic transformer compatible circuit E1 is in parallel with power factor correction circuit F1, and first resistor R1 is compatible with electronic transformer
Circuit E1 is in parallel, and switch driving circuit B1 is in parallel with 3rd resistor R3.
Switch driving circuit B1 can be realized by booster circuit (BOOST), be perceived by second resistance R2,3rd resistor R3 defeated
Simultaneously feedback signal maintains the output of system steady operation to operational amplifier to voltage out.
Electronic transformer compatible circuit E1 perceives peak to peak value electric current by the voltage at the detection both ends first resistor R1 and maintains
Prime electronic transformer stablizes output services.
Power factor correction circuit F1 is controlled during passing through trough and is adjusted its peak to peak electric current, so that system input current is more
Close to sine wave.
Particular embodiments described above, the technical issues of to solution of the invention, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to
The present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (1)
1. a kind of LED drive circuit, which is characterized in that it include load, switch driving circuit, electronic transformer compatible circuit,
Power factor correction circuit, 12V AC power source, the first inductance, first capacitor, the first triode, first resistor, second resistance,
3rd resistor, first diode, the second diode, third diode, the 4th diode, the 5th diode, load and the first electricity
Hold in parallel, the first inductance, the 5th diode, second resistance and 3rd resistor series connection, first diode and third diode, the 4th
Diodes in parallel, first diode is in parallel with 12V AC power source, and the second diode is in parallel with 12V AC power source, switch driving electricity
Road is in parallel with electronic transformer compatible circuit, and electronic transformer compatible circuit is in parallel with power factor correction circuit, first resistor
In parallel with electronic transformer compatible circuit, switch driving circuit is in parallel with 3rd resistor；
The switch driving circuit is realized by booster circuit, perceives output voltage and feedback letter by second resistance, 3rd resistor
Number give operational amplifier, maintain system steady operation output；
The electronic transformer compatible circuit perceives peak to peak value electric current by the voltage at detection first resistor both ends and maintains prime
Electronic transformer stablizes output services；
The power factor correction circuit controls during passing through trough and adjusts its peak to peak electric current, so that system input current more connects
It is bordering on sine wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710587028.3A CN107396492B (en) | 2017-07-18 | 2017-07-18 | Led drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710587028.3A CN107396492B (en) | 2017-07-18 | 2017-07-18 | Led drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107396492A CN107396492A (en) | 2017-11-24 |
| CN107396492B true CN107396492B (en) | 2018-12-11 |
Family
ID=60339368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710587028.3A Active CN107396492B (en) | 2017-07-18 | 2017-07-18 | Led drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107396492B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826359A (en) * | 2012-11-19 | 2014-05-28 | 马克西姆综合产品公司 | Led lighting system and method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201893981U (en) * | 2010-12-16 | 2011-07-06 | 慈溪明鑫照明科技有限公司 | Light-emitting diode (LED) spotlight drive circuit |
| CN202077230U (en) * | 2011-05-04 | 2011-12-14 | 深圳市金流明光电技术有限公司 | LED power circuit matched with electronic transformer |
| CN103687180B (en) * | 2012-09-19 | 2016-01-20 | 立锜科技股份有限公司 | The control circuit of light-emitting element circuit and control method thereof |
| CN103872933B (en) * | 2012-12-18 | 2015-09-02 | 立锜科技股份有限公司 | Power supply changeover device, relevant control circuit and method |
| TWM486123U (en) * | 2014-05-30 | 2014-09-11 | Unity Opto Technology Co Ltd | Self-excited TRIAC dimming circuit |
| CN105898920A (en) * | 2016-05-10 | 2016-08-24 | 东莞市领冠半导体照明有限公司 | MR16 power source drive circuit |
| CN106535419A (en) * | 2016-12-29 | 2017-03-22 | 铜陵迈维电子科技有限公司 | LED constant-current drive circuit based on anti-surge voltage and denoising functions |
-
2017
- 2017-07-18 CN CN201710587028.3A patent/CN107396492B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826359A (en) * | 2012-11-19 | 2014-05-28 | 马克西姆综合产品公司 | Led lighting system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107396492A (en) | 2017-11-24 |
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