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| 基于Zeta变换器的LED驱动电路 | |
| 引用本文： | 陆治国,王强. 基于Zeta变换器的LED驱动电路[J]. 低压电器, 2010, 0(10): 35-39,51 |
| 作者姓名： | 陆治国 王强 |
| 作者单位： | 重庆大学,输配电装备及系统安全与新技术国家重点实验室,重庆,400044 |
| 摘 要： | 提出了一种基于Zeta变换器的恒流输出电路作为高亮度白光LED灯的驱动方案。主电路结构在Zeta变换器的基础上进行了改进,采用固定导通时间控制策略,结构简单,无需补偿电路,动态响应速度快。分析了变换器工作方式,推导了变换器的稳态与小信号模型,对控制环路进行了理论分析,运用PSIM软件对系统闭环进行了仿真验证。 |
| 关 键 词： | 发光二极管驱动 升降压变换器 固定导通时间控制 |
LED Driver Based on Zeta Converter |
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| LU Zhiguo,WANG Qiang. LED Driver Based on Zeta Converter[J]. Low Voltage Apparatus, 2010, 0(10): 35-39,51 | |
| Authors: | LU Zhiguo WANG Qiang |
| Affiliation: | (State Key Laboratory of Power Transmission Equipment ＆ System Security and New Technology,Chongqing University,Chongqing 400044,China) |
| Abstract: | A kind of buck-boost constant current source based on Zeta converter as a high-brightness white LED lamp driver circuit was provided.The main circuit was based on basic Zeta converter with some improvement.The driver used constant on-time（COT） control mode,with simple structure,which needed no compensation cir-cuit and had fast dynamic response.The working principle of converter was analyzed.The static mode and small sig-nal mode of converter were derived.The theory of control loop was analyzod,and system closedloop was simulated and verified based on PSIM. |
| Keywords: | light-emiffing diode（LED） driver Zeta converter constant on-time（COT） control mode |
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