CN103582213A - High-efficiency LED lamp drive circuit - Google Patents
High-efficiency LED lamp drive circuit Download PDFInfo
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- CN103582213A CN103582213A CN201210267359.6A CN201210267359A CN103582213A CN 103582213 A CN103582213 A CN 103582213A CN 201210267359 A CN201210267359 A CN 201210267359A CN 103582213 A CN103582213 A CN 103582213A
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- circuit
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- backlight drive
- inductance
- inductor
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Abstract
The embodiment of the invention discloses a high-efficiency LED lamp drive circuit which comprises a backlight drive IC and a Sepic circuit. According to the Sepic circuit, a first inductor is connected to a voltage input end in series, one end of a second inductor is connected with the first inductor through an energy storage capacitor, and is connected with an LED load through a diode, and a circuit loop with a power supply negative end is formed. The backlight drive IC is provided with a current input end and a switchover pin, the current input end and the switchover pin are connected with the two ends of the first inductor respectively, the switchover pin carries out charging and discharging operations on the first inductor, the backlight drive IC is further provided with an overvoltage detection pin to detect the voltage of the LED load so that the switchover amount of the switchover pin can be controlled, and output voltages are made to be stable. Through the high-efficiency LED lamp drive circuit, the backlight drive IC and the Sepic circuit are matched to provide stable voltage output for the load.
Description
Technical field
The present invention relates to a kind of LED lamp drive circuit, relate in particular to a kind of efficient LED lamp drive circuit.
Background technology
Along with the development of electronic technology, the problem such as it is more and more higher that the small size of the drive circuit of LED requires, and the problem that is accompanied by appearance is the problem of its supply current deficiency, and its efficiency of tool is low, production cost height.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of efficient LED lamp drive circuit is provided.Can realize low cost exports for LED load provides burning voltage.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of efficient LED lamp drive circuit, comprise backlight drive IC, Sepic circuit, described Sepic circuit is that the first inductance is serially connected with voltage input end, second inductance one end connects the first inductance by storage capacitor, and connect LED load by diode, form the current circuit with power supply negative terminal; Described backlight drive IC has current input terminal and switches pin, be connected with the two ends of the first inductance respectively, described switching pin discharges and recharges operation to the first inductance, described backlight drive IC also has overvoltage and detects pin, voltage to LED load is tested, to control the amount of switched of switching pin, make output voltage stabilization.
Implement the embodiment of the present invention, there is following beneficial effect: adopt backlight drive IC to coordinate Sepic circuit to provide stable Voltage-output for load.
Accompanying drawing explanation
Fig. 1 is circuit structure principle schematic of the present invention.
Claims (1)
1. an efficient LED lamp drive circuit, it is characterized in that, comprise backlight drive IC, Sepic circuit, described Sepic circuit is that the first inductance is serially connected with voltage input end, second inductance one end connects the first inductance by storage capacitor, and connect LED load by diode, form the current circuit with power supply negative terminal; Described backlight drive IC has current input terminal and switches pin, be connected with the two ends of the first inductance respectively, described switching pin discharges and recharges operation to the first inductance, described backlight drive IC also has overvoltage and detects pin, voltage to LED load is tested, to control the amount of switched of switching pin, make output voltage stabilization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210267359.6A CN103582213A (en) | 2012-07-31 | 2012-07-31 | High-efficiency LED lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210267359.6A CN103582213A (en) | 2012-07-31 | 2012-07-31 | High-efficiency LED lamp drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103582213A true CN103582213A (en) | 2014-02-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210267359.6A Pending CN103582213A (en) | 2012-07-31 | 2012-07-31 | High-efficiency LED lamp drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103582213A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168695A (en) * | 2014-07-23 | 2014-11-26 | 合肥荣事达三洋电器股份有限公司 | LED backlight circuit based on SEPIC topological work |
| CN104168695B (en) * | 2014-07-23 | 2017-01-04 | 惠而浦（中国）股份有限公司 | A kind of LED backlight circuit based on the work of SEPIC topology |
| CN114096050A (en) * | 2021-10-13 | 2022-02-25 | 深圳市奥金瑞科技有限公司 | Novel lighting switch system based on Bluetooth wireless ad hoc network technology |
| WO2022109213A1 (en) * | 2020-11-20 | 2022-05-27 | Russell Ann | Driver circuit and method for providing a pulse |
-
2012
- 2012-07-31 CN CN201210267359.6A patent/CN103582213A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168695A (en) * | 2014-07-23 | 2014-11-26 | 合肥荣事达三洋电器股份有限公司 | LED backlight circuit based on SEPIC topological work |
| CN104168695B (en) * | 2014-07-23 | 2017-01-04 | 惠而浦（中国）股份有限公司 | A kind of LED backlight circuit based on the work of SEPIC topology |
| WO2022109213A1 (en) * | 2020-11-20 | 2022-05-27 | Russell Ann | Driver circuit and method for providing a pulse |
| US11990838B2 (en) | 2020-11-20 | 2024-05-21 | Ams-Osram International Gmbh | Driver circuit and method for providing a pulse |
| CN114096050A (en) * | 2021-10-13 | 2022-02-25 | 深圳市奥金瑞科技有限公司 | Novel lighting switch system based on Bluetooth wireless ad hoc network technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140212 |