UM0673 Datasheet, PDF (1/19 Pages) STMicroelectronics – The power board STEVAL-ISF001V2 is a 3 kW PFC designed

UM0673
User manual
STEVAL-ISF001V2, 3 kW FOT PFC board
based on the L6563S
Note:
Introduction
The power board STEVAL-ISF001V2 is a 3 kW PFC designed for industrial and domestic
applications. The board must be used for demonstration purposes in order to evaluate the
potential of the FOT (fixed-off-time control, patented by ST) to implement a high-power PFC
with performance comparable to a standard continuous-mode PFC, but using a simpler
controller chip originally designed for TM (transition-mode) PFC operating conditions. This
demonstration board works directly from the AC mains supply in the single range voltage
(185 Vrms - 265 Vrms) and provides a 400 V stable and regulated DC bus output capable of
a maximum of 7.5 A.
The low voltage necessary to supply the driver is generated by an auxiliary winding on the
main inductor, so an external power supply is not needed to start the operation of the board.
The design is:
■ quick to set up and install
■ re-usable (the Gerber files are available for free)
■ ready for downsizing if required.
Please read Section 2 of this manual before attempting any operation.
Figure 1. Line, inductor, switch and diode
current in FF-CCM PFC
Figure 2. Line, inductor, switch and diode
current in TM PFC
December 2012
AM01972v1
Doc ID 15337 Rev 2
AM01980v1
1/19
www.st.com