摘要
为提高HB-LED驱动电源的效率和功率因数,设计了基于"PFC+LLC+CV、CC"拓扑结构的HB-LED(150W)驱动电源,即采用TM模式PFC控制器L6563H与高压谐振控制器L6599组成LLC半桥谐振电路,可实现在全电压范围及全负载条件下主功率管的零电压开关(ZVS)和整流二极管的零电流开关(ZCS)控制,并由LM358放大器与TL431组成恒压(CV)、恒流(CC)控制电路。功率因数达到97%,整机效率92%以上。
HB-LED(150W) Drive power based on "PFC+LLC+VC,CC" topology structures is designed,which use LLC half-bridge resonance circuit composed by TM mode PFC controller L6563H and High-pressure resonant controller L6599,realizing Zero voltage switching(ZVS) of main power tube and zero current switching of Rectifier diode under Full voltage range and full load condition,meanwhile,it use constant voltage(CV) and constant current(CC) circuit to improve efficiency and power factor of HB-LED drive power.
出处
《现代显示》
2011年第10期16-21,共6页
Advanced Display