AN1440 80W的功率因数校正AC-DC适配器与待机使用L6561的L5991A

AN1440 80W的功率因数校正AC-DC适配器与待机使用L6561的L5991A

AN1440
APPLICATION NOTE
80W POWER-FACTOR-CORRECTED AC-DC ADAPTER
WITH STANDBY USING THE L6561 AND THE L5991A
by C. Adragna




This note describes an 80 W, wide-range mains, power-factor-corrected AC-DC adapter. Its electrical
specification is tailored on a typical hi-end portable computer power adapter. The peculiarity of this de-
sign is its extremely low no-load input consumption (<1 W).
The architecture is based on a two-stage approach: a front-end PFC pre-regulator based on the L6561
TM PFC cont