AN3172 Datasheet, PDF (1/31 Pages) STMicroelectronics – This application note describes the performance of a 90 W

AN3172
Application note
19 V - 90 W adapter with PFC for laptop computers
using the L6563H and L6599A
Introduction
This application note describes the performance of a 90 W, wide-range mains, power-factor-
corrected, AC-DC adapter demonstration board. Its electrical specification is tailored on a
typical hi-end portable computer power adapter.
The architecture is based on a two-stage approach; a front-end PFC pre-regulator based on
the L6563H TM PFC controller and a downstream LLC resonant half-bridge converter using
the new L6599A resonant controller. Thanks to the chipset used, the main aspects of this
design are very high efficiency, compliance with ENERGY STAR^® Eligibility Criteria (EPA
rev. 2.0 EPS), and very low input consumption at no-load (<0.3 W).
Figure 1. EVL6599A-90WADP: 90 W adapter demonstration board
December 2010
Doc ID 17230 Rev 1
1/31
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