AN3014 Datasheet, PDF (1/29 Pages) M/A-COM Technology Solutions, Inc. – Electrical Characterization of the MAAMSS0031 16 dB Gain Application Circuit

AN3014
Application note
19 V, 90 W resonant converter with synchronous rectification
using the L6563H, L6599A and SRK2000
Introduction
This application note describes the characteristics and the features of a 90 W demonstration
board (EVL90WADP-LLCSR), tailored to specifications for a typical high-end portable
computer power supply. A peculiarity of this SMPS design is the very high efficiency
compliant with ENERGY STAR^® eligibility criteria (EPA rev. 2.0 EPS). One of the key factors
in achieving this result is the SRK2000. This synchronous rectification driver for LLC
resonant converters allows significantly reduced secondary-side losses. Thanks to this
improvement, secondary-side heatsinks, which are typically needed for this power range,
can be dramatically reduced or even removed.
Figure 1. EVL90WADP-LLCSR: 90 W adapter demonstration board
!-V
December 2010
Doc ID 16064 Rev 2
1/29
www.st.com