AN2331 Datasheet, PDF (1/24 Pages) STMicroelectronics – This note describes the performances

AN2331
Application note
Reference design: 100W high performance, half bridge LLC
multi-resonant SMPS with PFC
Introduction
This note describes the performances of a 100 W, wide-range mains, power-factor-
corrected AC-DC adapter reference board (EVAL6598-100W). The peculiarities of this
design are the high efficiency and the low no-load input consumption. The architecture is
based on a two-stage approach: a front-end PFC pre-regulator based on the L6563 TM PFC
controller and a downstream multi-resonant half-bridge converter using the L6598 resonant
controller.
The PFC TM operation and the top-level efficiency performance of the HB-LLC topology
provide very good overall circuit efficiency.
Figure 1. L6598 and L6563 100W resonant SMPS reference board
June 2006
Rev 1
1/24
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