FSFR1700XS Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converters

October 2010
FSFR-XS 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™ with Fast-Recovery Body Diode
ƒ Fixed Dead Time (350ns) Optimized for MOSFETs
ƒ Up to 300kHz Operating Frequency
ƒ Auto-Restart Operation for All Protections with
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-XS series includes 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-
XS series simplifies designs while improving productivity
and performance. The FSFR-XS 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
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 reverse
recovery. Using the zero-voltage-switching (ZVS)
technique dramatically reduces the switching losses and
significantly improves efficiency. The ZVS also reduces
the switching noise noticeably, which allows a small-
sized Electromagnetic Interference (EMI) filter.
The FSFR-XS series can be applied to 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
FSFR2100XS
Package
Operating
Junction
Temperature
RDS(ON_MAX)
0.51Ω
Maximum Output Power
without Heatsink
(VIN=350~400V)^(1,2)
180W
FSFR1800XS
FSFR1700XS
9-SIP
0.95Ω
1.25Ω
120W
100W
FSFR1600XS
FSFR2100XSL
-40 to +130°C
1.55Ω
0.51Ω
80W
180W
FSFR1800XSL _9-SIP
FSFR1700XSL ^L-Forming
0.95Ω
1.25Ω
120W
100W
FSFR1600XSL
1.55Ω
80W
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.
© 2010 Fairchild Semiconductor Corporation
FSFR-XS Series • Rev.1.0.1
Maximum Output
Power with Heatsink
(VIN=350~400V)^(1,2)
400W
260W
200W
160W
400W
260W
200W
160W
www.fairchildsemi.com