FSFR1800

Product Summary

The FSFR1800 is a highly integrated power switch designed for high-efficiency half-bridge resonant converter. Offering everything necessary to build a reliable and robust resonant converter, the FSFR1800 designs and improves productivity, while improving performance. The FSFR1800 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 applications of the FSFR1800 include PDP and LCD TVs, Desktop PCs and servers, Adapters, Telecom Power Supplies, Audio Power Supplies.

Parametrics

FSFR1800 absolute maximum ratings: (1)VDS, Maximum Drain-to-Source Voltage (VDL-VCTR and VCTR-PG) All Others: 500V; (2)LVCC, Low-side Supply Voltage: -0.3 to 25.0 V; (3)HVCC, to VCTR High-side VCC Pin to Low-side Drain Voltage: -0.3 to 25.0 V; (4)HVCC, High-side Floating Supply Voltage All Others: -0.3 to 525.0V; (5)VCON, Control Pin Input Voltage: -0.3 to LVCC V; (6)VCS, Current Sense (CS) Pin Input Voltage: -5.0 to 1.0 V; (7)VRT, RT Pin Input Voltage: -0.3 to 5.0 V; (8)dVCTR/dt, Allowable Low-side MOSFET Drain Voltage Slew Rate: 11.7 V/ns; (9)PD Total Power Dissipation: 11.6W; (10)TJ, Maximum Junction Temperature: +150℃; (11)TJ, Recommended Operating Junction Temperature: -40 to +130℃; (12)TSTG, Storage Temperature Range: -55 to +150℃.

Features

FSFR1800 features: (1)Variable Frequency Control with 50% Duty Cycle for Half-bridge Resonant Converter Topology; (2)High Efficiency through Zero Voltage Switching (ZVS); (3)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; (4)Fixed Dead Time (350ns) Optimized for MOSFETs; (5)Up to 300kHz Operating Frequency; (6)Pulse Skipping for Frequency Limit (Programmable) at Light-Load Condition; (7)Remote On/Off Control Using Control Pin; (8)Protection Functions: Over-Voltage Protection (OVP), Over-Load Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD).

Diagrams