AN2761 Datasheet, PDF (1/36 Pages) STMicroelectronics – Solution for designing a transition mode

AN2761
Application note
Solution for designing a transition mode
PFC preregulator with the L6562A
Introduction
The TM (transition mode) technique is widely used for power factor correction in low and
middle power applications, such as lamp ballasts, high-end adapters, flat TVs and monitors,
and PC power supplies. The L6562A is the latest proposal from STMicroelectronics for this
market as well as emerging markets that may require a low-cost power factor correction.
Based on a well-established architecture, the L6562A offers excellent performance that
considerably enlarges its field of application.
Figure 1. L6562A PFC controller in an SMPS architecture
SMPS
400 VDC
Cin
PFC
CONV.
DC-DC
EMI
filter
PFC controller:
L6562A
November 2009
Doc ID 14690 Rev 2
1/36
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