FSFR1800

FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter May 2008 FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converters Features ƒ ƒ ƒ Variable Frequency Control with 50% Duty Cycle for Half-bridge Resonant Converter Topology High Efficiency through Zero Voltage Switching (ZVS) 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. Fixed Dead Time (350ns) Optimized for MOSFETs Up to 300kHz Operating Frequency Pulse Skipping for Frequency Limit (Programmable) at Light-Load Condition Remote On/Off Control Using Control Pin Protection Functions: Over-Voltage Protection (OVP), Over-Load Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) 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 s...