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 FSFRUS 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.

Features Variable Frequency Control with 50% Duty Cycle for Half-Bridge Resonant Converter Topology
High Efficiency through Zero Voltage Switching (ZVS)
Internal UniFET™s with Fast-Recovery Type Body Diode
Fixed Dead Time (350ns) Optimized for MOSFETs
Up to 300kHz Operating Frequency
Auto-Restart Operation for All Protections with An External LVCC
Protection Functions: Over-Voltage Protection (OVP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD)

Applications PDP and LCD TVs
Desktop PCs and Servers
Adapters
Telecom Power Supplies

Manufacturer	onsemi
Product Category	AC DC Converters, Offline Switchers
Series	FSFR-US
Product	Power Switches
Type	Resonant Half Bridge
Packaging	Tube
Unit-Weight	0.122782 oz
Mounting-Style	Through Hole
Operating-Temperature-Range	- 40 C to + 130 C
Package-Case	9-SIP
Operating-Temperature	-40°C ~ 130°C (TJ)
Mounting-Type	Through Hole
Supplier-Device-Package	9-SIP
Watt	400W
Number-of-Outputs	1 Output
Output-Isolation	Isolated
Internal-Switch-s	Yes
Voltage-Breakdown	500V
Topology	Half-Bridge
Voltage-Start-Up	12.5V
Voltage-Supply-Vcc-Vdd	10 V ~ 25 V
Duty-Cycle	50%
Frequency-Switching	Up to 300kHz
Fault-Protection	Current Limiting, Over Temperature, Over Voltage
Control-Features	Frequency Control
Output-Power	180 W
Maximum Operating Temperature	+ 130 C
Operating-Supply-Current	2 mA
Switching-Frequency	100 kHz
Package-Case	SIP-9L
Duty-Cycle-Max	52 %
Input-Supply-Voltage-Min	10 V
Input-Supply-Voltage-Max	25 V