Datasheet

February 2013
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSFA2100 • Rev. 1.0.1
FSFA2100 — Fairchild Power Switch (FPS
™
) for Half-Bridge PWM Converter
FSFA2100 — Fairchild Power Switch (FPS™)
for Half-Bridge PWM Converters
Features
 Optimized for Complementary Driven Half-Bridge
Soft-Switching Converters
 Can be Applied to Various Topologies: Asymmetric
PWM Half-Bridge Converters, Asymmetric PWM
Flyback Converters, Asymmetric PWM Forward
Converters, Active Clamp Flyback Converters
 High Efficiency through Zero-Voltage-Switching (ZVS)
 Internal SuperFET™s with Fast-Recovery Type
Body Diode (t
rr
=120 ns)
 Fixed Dead Time (200 ns) Optimized for MOSFETs
 Up to 300 kHz Operating Frequency
 Internal Soft-Start
 Pulse-by-Pulse Current Limit
 Burst-Mode Operation for Low Standby Power
Consumption
 Protection Functions: Over-Voltage Protection
(OVP), Over-Load Protection (OLP), Abnormal Over-
Current Protection (AOCP), Internal Thermal
Shutdown (TSD)
Applications
 PDP and LCD TVs
 Desktop PCs and Servers
 Adapters
 Telecom Power Supplies
Description
The growing demand for higher power density and low
profile in power converter designs has forced designers
to increase switching frequencies. Operation at higher
frequencies considerably reduces the size of passive
components, such as transformers and filters. However,
switching losses have been an obstacle to high-
frequency operation. To reduce switching losses and
allow high-frequency operation, Pulse Width Modulation
(PWM) with soft-switching techniques have been
developed. These techniques allow switching devices to
be softly commutated, which dramatically reduces the
switching losses and noise.
FSFA2100 is an integrated PWM controller and
SuperFET™ specifically designed for Zero-Voltage-
Switching (ZVS) half-bridge converters with minimal
external components. The internal controller includes an
oscillator, under-voltage-lockout, leading-edge blanking
(LEB), optimized high-side and low-side gate driver,
internal soft-start, temperature-compensated precise
current sources for loop compensation and self-
protection circuitry. Compared with discrete MOSFET
and PWM controller solution, FSFA2100 can reduce total
cost; component count, size, and weight; while
simultaneously increasing efficiency, productivity, and
system reliability.
Ordering Information
Part
Number
Operating
Junction
Temperature
R
DS(ON_MAX)
Maximum Output
Power without
Heatsink
(V
IN
=350~400 V)
(1,2)
Maximum Output Power
with Heatsink
(V
IN
=350~400 V)
(1,2)
Package
FSFA2100 -40 to +130°C
0.38 Ω
200 W 450 W 9-SIP
Notes:
1. The junction temperature can limit the maximum output power.
2. Maximum practical continuous power in an open-frame design at 50°C ambient.
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