Description

The FAN7621S is a pulse frequency modulation controller for high-efficiency half-bridge resonant converters. Offering everything necessary to build a reliable and robust resonant converter, the FAN7621S simplifies designs and improves productivity, while improving performance. The FAN7621S includes a highside 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 stable operation with excellent noise immunity.

Features

■ Variable Frequency Control with 50 Duty Cycle for Half-bridge Resonant Converter Topology

■ High Efficiency through Zero Voltage Switching (ZVS)

■ Fixed Dead Time: 350ns

■ 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

■ Video Game Consoles