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