AN2623 Datasheet, PDF (1/25 Pages) STMicroelectronics – Evaluation board for off-line forward converter based on L5991

AN2623
Application note
Evaluation board
for off-line forward converter based on L5991
Introduction
This application note gives a practical example of a 160 W, isolated, forward converter using
the L5991, high frequency current mode PWM controller. Design procedures for both the
power stage and controller are presented.
Generally for this power level the norm ICE61000-3-2 imposes the use of a PFC pre-
regulator stage, but some countries do not require compliance to this norm. The forward
converter presented here does not have a PFC.
Figure 1. 160 W off-line forward converter, evaluation board
October 2007
Rev 1
1/25
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