| 高压、高效率白光LED驱动电路的研究与设计 |
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| 引用本文： | 潘文捷, 葛康康, 何乐年,.高压、高效率白光LED驱动电路的研究与设计[J].电子器件,2008,31(6). |
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| 作者姓名： | 潘文捷 葛康康 何乐年 |
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| 作者单位： | 浙江大学超大规模集成电路研究所,杭州,310027 |
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| 摘 要： | 设计了一种高效率的高输入电压,恒定电流输出的白光LED驱动芯片.采用高压工艺,以脉宽调制(PWM)峰值电流的控制方式,实现了宽范围电压输入、恒定电流输出的LED驱动芯片的设计.内部集成了带隙电压基准源,产生0.25V的参考电压.芯片设计采用了高压横向扩散金属氧化物半导体场效应管(LDDMOS),设计了电压预调整电路,实现了输入电压范围在85V-400V间变化,输出电流在1毫安到1安培间设定.芯片仿真结果显示电能转换效率最高可达90%以上.
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| 关 键 词： | 集成电路 高压LED驱动电路 脉宽调制 峰值电流控制 |
A Study and Design of the High Efficiency and High Voltage Driver of the White Light LED |
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| PAN Wen-jie,GE Kang-kang,HE Le-nian.A Study and Design of the High Efficiency and High Voltage Driver of the White Light LED[J].Journal of Electron Devices,2008,31(6). |
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| Authors: | PAN Wen-jie GE Kang-kang HE Le-nian |
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| Affiliation: | PAN Wen-jie,GE Kang-kang,HE Le-nian(Institute of VLSI Design,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | A high efficiency driver of white light LED with high input voltage,constant output current is designed by using the high voltage process.The LED driver with wide range input voltage and constant LED current is realized by means of using the pulse width modulation to control the peak current.A reference voltage of 0.25 V from bandgap voltage reference is constructed in the chip.As the high voltage process provides LDDMOS(lightly-doped drain MOSFET)device,a voltage premodulator is designed so that the input ... |
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| Keywords: | High power light LED PWM Peak current control |
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