Powerint LYT2005E 8W LED驱动解决方案(DER422)
PowerInt公司的LYTSwitch-2系列产品是不需要光耦和次级控制电路的低功率恒流(CC) LED驱动器,包括了750V高压开关MOSFET,创新的ON/OFF控制状态机,用于自偏压的高压开关电流源,降低EMI的频率抖动器,逐个周期的限流和滞后的热关断等功能,无负载功耗低于30mW.主要用于LED灯,顶灯, 照明器具,镇流器和T8管灯.本文介绍了LYTSwitch-2系列产品亮点,框图, 8.6W LED电源电路图,以及采用LYTSwitchTM-2 LYT2005E的8W PFC无调光绝缘反激恒压LED驱动器电路图,材料清单和PCB元件布局图与装配图.
The LYTSwitch-2 family of ICs dramatically simplifies low power CC LED drivers by eliminating the optocoupler and secondary control circuitry. The family introduces a revolutionary control technique to provide accurate output current regulation, compensating for transformer and external component variations, and device parameter tolerances as well as input voltage variations.
The device incorporates a high-voltage switching MOSFET, a novel ON/OFF control state machine, a high-voltage switched current source for self-biasing, frequency jitter to reduce EMI, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry into a monolithic IC. This high level of integration enables highly cost-effective designs with very few external components, reducing solution cost and driver size.
..
