FSFR1800US Datasheet, PDF (1/15 Pages) Fairchild Semiconductor – FSFR-US Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converters

May 2010
FSFR-US Series — Fairchild Power Switch (FPS™)
for Half-Bridge Resonant Converters
Features
ƒ Variable Frequency Control with 50% Duty Cycle
for Half-Bridge Resonant Converter Topology
ƒ High Efficiency through Zero Voltage Switching (ZVS)
ƒ Internal UniFET™s with Fast-Recovery Type
Body Diode
ƒ Fixed Dead Time (350ns) Optimized for MOSFETs
ƒ Up to 300kHz Operating Frequency
ƒ Auto-Restart Operation for All Protections with An
External LVCC
ƒ Protection Functions: Over-Voltage Protection
(OVP), Over-Current Protection (OCP), Abnormal
Over-Current Protection (AOCP), Internal Thermal
Shutdown (TSD)
Applications
ƒ PDP and LCD TVs
ƒ Desktop PCs and Servers
ƒ Adapters
ƒ Telecom Power Supplies
Description
The FSFR-US series are a highly integrated power
switches designed for high-efficiency half-bridge
resonant converters. Offering everything necessary to
build a reliable and robust resonant converter, the FSFR-
US series simplifies designs and improves productivity,
while improving performance. The FSFR-US series
combines power MOSFETs with fast-recovery type body
diodes, a high-side gate-drive circuit, an accurate current
controlled oscillator, frequency limit circuit, soft-start, and
built-in protection functions. The high-side gate-drive
circuit has a common-mode noise cancellation capability,
which guarantees stable operation with excellent noise
immunity. The fast-recovery body diode of the MOSFETs
improves reliability against abnormal operation
conditions, while minimizing the effect of the reverse
recovery. Using the zero-voltage-switching (ZVS)
technique dramatically reduces the switching losses and
efficiency is significantly improved. The ZVS also
reduces the switching noise noticeably, which allows a
small-sized Electromagnetic Interference (EMI) filter.
The FSFR-US series can be applied to various resonant
converter topologies such as series resonant, parallel
resonant, and LLC resonant converters.
Related Resources
AN4151 — Half-bridge LLC Resonant Converter Design
using FSFR-Series Fairchild Power Switch (FPS^TM)
Ordering Information
Part Number
Package
Operating
Junction
Temperature
RDS(ON_MAX)
Maximum Output Power
without Heatsink
(VIN=350~400V) ^(1,2)
FSFR2100US
0.51Ω
180W
FSFR1800US
9-SIP
0.95Ω
120W
FSFR1700US
FSFR2100USL
FSFR1800USL
FSFR1700USL
9-SIP
L-Forming
-40 to +130°C
1.25Ω
0.51Ω
0.95Ω
1.25Ω
100W
180W
120W
100W
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.
Maximum Output
Power with Heatsink
(VIN=350~400V)^(1,2)
400W
260W
200W
400W
260W
200W
© 2009 Fairchild Semiconductor Corporation
FSFR-US Series • Rev.1.0.2
www.fairchildsemi.com