Powerint LNK457DG RDR251 5W TRIAC调光LED驱动方案

Powerint公司的LNK454/456-458/460 LinkSwitch-PL系列具有小型体积和低成本的单级PFC的恒流驱动器,集成了725V功率MOSFER,新颖的不连续模式可变频率控制器,频率抖动器,逐个周期的电流限制和滞后的热关断.输入电压很宽,输出功率高达16W.本文介绍了LNK454/456-458/460产品亮点,方框图以及5W 15V LED驱动器电路图,采用LNK4570的5W可调光PFC LED驱动器(非隔离)参考设计电路图,变压器电路图和材料清单.
Reference Design Report for a 5 W Dimmable Power Factor Corrected LED Driver (Non-Isolated) Using LinkSwitchTM-PL LNK457DG LNK454/456-458/460 LinkSwitch-PL Family LED Driver IC with TRIAC Dimming, Single-Stage PFC and Constant Current Control for Non-Isolated Applications
The LinkSwitch-PL family enables a very small and low cost single-stage power factor corrected constant current driver for solid state lighting. Optimized for direct LED current sensing, the LinkSwitch-PL operates over a wide input voltage range delivering an output power of up to 16 W. The LinkSwitch-PL control algorithm provides flicker-free TRIAC dimming with minimal external components.
Each device incorporates a 725 V rated power MOSFET, a novel discontinuous mode variable frequency variable on-time controller, frequency jitter, cycle by cycle current limit and hysteretic thermal shutdown in a monolithic 4-pin IC, available in SO-8C, eSOP-12, and eDIP-12 packages.
LNK454/456-458/460产品亮点:
Dramatically Simplifies Off-line LED Drivers
• Flicker-free phase-controlled TRIAC dimming
• Single stage power factor correction and accurate constant current (CC) output
• Very low component count with small non-electrolytic bulk capacitor for compact replacement lamp designs
• Compact SO8, eSOP, and eDIP packages
• Completely eliminates control loop compensation Advanced Performance Features
• Optimized for non-isolated flyback designs
• Frequency jitter greatly reduces EMI filter size and costs
• Low dissipation direct sensing of LED current Advanced...