ST ISF001V1 User Manual

based on the L6563 and STW55NM60N

Features

■ Single range input voltage from 185 V to 265 V,

50/60 Hz

■ Output voltage: 400 V ±5%

■ Inductor saturation protection

■ Optimized EMC input filter (in accordance with

EN55014 and EN55022)

■ Power factor > 0.98

■ Efficiency > 95%

■ THD (total harmonic distortion) below 10%

starting from 1 kW

■ RoHS compliant

STEVAL-ISF001V1

3 kW fixed off-time PFC

Data brief

STEVAL-ISF001V1

Description

The STEVAL-ISF001V1 demonstration board
provides a compact and ready-to-use solution for
the implementation of a simple PFC (power factor
correction) system capable of supplying loads
with a power close to the maximum delivered in
most typical domestic applications.

For this power range, the use of continuous mode
PFC operation becomes mandatory in order to
drain a current with an RMS value not exceeding
the maximum allowed by the metering system,
and to minimize the size of components involved
in system operation.

Normally, the use of a standard continuous mode
driver chip requires a more expensive and
complex driver, as well as associated passive
components. However, STMicroelectronics’
patented solution allows the use of a simple
driver, designed for transition mode operation, in
fixed off-time, variable frequency, PWM
modulation.

This type of modulation provides a current on the
PFC boost inductor comparable to that of
traditional continuous mode modulation.

November 2009 Doc ID 16769 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

4

Schematic diagram STEVAL-ISF001V1

1 Schematic diagram

Figure 1. STEVAL-ISF001V1 schematic diagram

2/4 Doc ID 16769 Rev 1

AM01975v1