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FSFR-Series —
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 (t
=120ns) for FSFR2100 and UniFETs
rr
with Fast-Recovery Type Body Diode (t
FSFR2100U/2000/1900/1800/1700.
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
Ordering Information
Part
Package
Number
FSFR2100
FSFR2100U
FSFR2000
9-SIP
FSFR1900
FSFR1800
FSFR1700
Notes:
1.
The junction temperature can limit the maximum output power.
2.
Maximum practical continuous power in an open-frame design at 50qC ambient.
For Fairchild's definition of Eco Status, please visit:
© 2007 Fairchild Semiconductor Corporation
FSFR series • Rev.1.0.5
Fairchild Power Switch (FPS™)
<160ns) for
rr
Operating
Eco
Junction
R
Status
Temperature
RoHS
-40 to +130°C
Description
The FSFR-series are a highly integrated power switches
designed
for
high-efficiency
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
controlled oscillator, frequency limit circuit, soft-start, and
built-in protection functions. The high-side gate-drive
circuit
has
a
common-mode
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
Maximum Output Power
without Heatsink
DS(ON_MAX)
(V
=350~400V)
IN
0.38:
200W
180W
0.51:
160W
0.67:
140W
0.85:
120W
0.95:
100W
1.25:
http://www.fairchildsemi.com/company/green/rohs_green.html
MAS 100 / MAS 110 / MAS 1 Service Manual
April 2009
half-bridge
resonant
circuit,
an
accurate
current
noise
cancellation
TM
)
Maximum Output Power
with Heatsink
(1,2)
(1,2)
(V
=350~400V)
IN
450W
400W
350W
300W
260W
200W
.
www.fairchildsemi.com
Page 28 of 57

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