TI UCC28810中小功率LED照明应用方案

2009-07-17 10:57:00 TI

TI 公司的UCC28810和UCC28811是中小功率通用LED照明电源控制器,具有功率因素修正(PFC)和EMC兼容特性.设计用于工作在临界导通模式的反激,降压或升压转换器. UCC28810/1集成了用于反馈误差处理的跨导电压放大器,用来产生正比于输入电压的电流指令的电流基准发生器,电流检测(PWM)比较器,PWM逻辑和用来驱动外接FET的图腾柱驱动器.此外,控制器还提供峰值电流限制,重起定时器,过压保护(OVP)以及使能等. UCC28810和UCC28811广泛用在交流输入HB LED照明,工业,商业和住宅区照明以及户外照明如路灯,停车场,建筑物和装饰性LED照明等.本文介绍了UCC28810和UCC28811的主要特性,方框图, 简化应用电路图, 25W PFC反激转换器参考设计以及PR788 100W AC/DC LED电流驱动器参考设计和元件列表.

The UCC28810 and UCC28811 are general lighting power controllers for low to medium power lumens applications requiring power factor correction and EMC compliance. It is designed for controlling a flyback, buck or boost converter operating in critical conduction mode. It features a transconductance voltage amplifier for feedback error processing, a simple current reference generator for generating a current command proportional to the input voltage, a current-sense (PWM) comparator, PWM logic and a totem-pole driver for driving an external FET.
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