| LED汽车前照灯驱动电路设计与仿真 |
| |
| 引用本文： | 刘益宏,屠大维.LED汽车前照灯驱动电路设计与仿真[J].现代电子技术,2011,34(6):203-207. |
| |
| 作者姓名： | 刘益宏 屠大维 |
| |
| 作者单位： | 上海大学,机电工程与自动化学院,上海,200072 |
| |
| 基金项目： | 国家自然科学基金资助项目:光流光照行为模型及自适应前照系统应用初探 |
| |
| 摘 要： | 随着大功率LED性价比的提高，输出光流量的增加，使LED应用在汽车前照灯成为可能。在输入电压在10～14V之间变化，负载采用8颗700mA大功率白光LED的条件下确定驱动方式、拓扑结构和调光方式，设计一种基于LTC3783芯片PWM控制LED亮度的恒流I。ED汽车前照灯驱动电路，并用LTspiceIV软件对电路进行了仿真。结果表明，输入电压在10～14V变化时输出电流为一个710mA均值，有0．7％纹波的电流，电流精度为2．1％，输出电压为28．6V，输出功率为20w，电路转换效率为91％。有PWM信号输入时，电路输出一个与PWM信号相同占空比的电流。通过调节PWM信号的占空比实现LED亮度的控制。
|
| 关 键 词： | 气车前照灯 大功率LED 脉宽调制 LTSPice IV |
Design and Simulation of LED Automotive Headlamp Driver |
| |
| LIU Yi-hong,TU Da-wei.Design and Simulation of LED Automotive Headlamp Driver[J].Modern Electronic Technique,2011,34(6):203-207. |
| |
| Authors: | LIU Yi-hong TU Da-wei |
| |
| Affiliation: | LIU Yi-hong,TU Da-wei(School of Mechatronics Engineering and Automation,Shanghai University,Shanghai 200072,China) |
| |
| Abstract: | With the improvement of cost-effective and increase of output light flow,the high-power LED used in automobile headlamps becomes possible.A constant current LED array driver used as automotive headlamp based on LTC3783 chip is designed,which considering the drive mode,topology and dimming means.An automotive supply voltage was used as input voltage,and the drive used 8 white high power 700 mA LED in series.The circuit simulation results with LTspiceIV software show that the output current is a mean of 710 m... |
| |
| Keywords: | LTSPice IV |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
