| 升压型LED驱动电路设计 |
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| 引用本文： | 陆治国,王强.升压型LED驱动电路设计[J].低压电器,2010(13):43-47. |
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| 作者姓名： | 陆治国 王强 |
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| 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; |
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| 摘 要： | 提出了一种对三态升压变换器进行恒流输出控制以驱动LED灯新型控制方式。利用在变换器电感旁并联附加开关的方式为电感建立续流环路,控制策略确定在一定条件下主副开关轮流切换导通,使电感电流始终维持在一定值,再利用固定导通时间单周期控制方式确保输出恒流。控制电路能有效消除Boost电路右半平面零点（RHP zero）的影响,使系统具有更快的动态响应速度。
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| 关 键 词： | 升压变换器 固定导通时间 单周期控制 |
Design of Boost LED Driver |
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| LU Zhiguo,WANG Qiang.Design of Boost LED Driver[J].Low Voltage Apparatus,2010(13):43-47. |
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| Authors: | LU Zhiguo WANG Qiang |
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| Affiliation: | (State Key Laboratory of Power Transmission Equipment ＆ System Security and New Technology,Chongqing University,Chongqing 400044,China) |
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| Abstract: | A novel control strategy to make output current of tristate Boost converter constant to drive LED lamp was proposed.The inductor current flow loop was built by adding parallel plus switch,the control strategy decided when and which switch on or off to get a constant inductor current,and cooperate with constant on time（COT） one cycle controller to get a constant output current.The control loop eliminated the right half plane（RHP） zero of Boost converter,making system dynamic response faster. |
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| Keywords: | Boost converter constant on time（COT） one cycle control |
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