FSFR2100_08 Datasheet, PDF (1/17 Pages) Fairchild Semiconductor – Power Switch (FPS™) for Half-Bridge Resonant Converters

May 2008
FSFR-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 SuperFET™s with Fast-Recovery Type
Body Diode (trr=120ns) for FSFR2100 and UniFETs
with Fast-Recovery Type Body Diode (trr<160ns) for
FSFR2000/1900/1800/1700.
ƒ Fixed Dead Time (350ns) Optimized for MOSFETs
ƒ Up to 300kHz Operating Frequency
ƒ Pulse Skipping for Frequency Limit (Programmable)
at Light-Load Condition
ƒ Remote On/Off Control Using Control Pin
ƒ Protection Functions: Over-Voltage Protection
(OVP), Over-Load Protection (OLP), 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
ƒ Audio Power Supplies
Description
The FSFR-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-series
simplifies designs and improves productivity, while
improving performance. The FSFR-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-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
Maximum Output Power Maximum Output
R_{DS(ON_MAX)}
without Heatsink
(V_IN=350~400V) ^(1,2)
Power with Heatsink
(V_IN=350~400V)^(1,2)
FSFR2100
0.38Ω
200W
450W
FSFR2000
0.67Ω
160W
350W
FSFR1900 9-SIP
-40 to +130°C
0.85Ω
140W
300W
FSFR1800
0.95Ω
120W
260W
FSFR1700
1.25Ω
100W
200W
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.
All standard Fairchild Semiconductor products are RoHS compliant and many are also “GREEN” or going green. For Fairchild’s
definition of “green” please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2007 Fairchild Semiconductor Corporation
FSFR series • 1.0.3
www.fairchildsemi.com