Description

The FAN7631 is a pulse-frequency modulation controller for high-efficiency half-bridge resonant converters that includes a high-side gate drive circuit, an accurate current-controlled oscillator, and various protection functions. The FAN7631 features include variable dead time, operating frequency up to 600kHz, protections such as LUVLO, and a selectable latch or A/R protection using the LS pin for user convenience.

Features

Variable Frequency Control with 50 Duty Cycle for Half-Bridge Resonant Converter Topologies

High Efficiency with Zero-Voltage-Switching (ZVS)

Up to 600kHz Operating Frequency

Built-in High-Side Gate Driver

High Gate-Driving Current: +500mA/-1000mA

Programmable Dead Time with a Resistor

Pulse Skipping and Burst Operation for Frequency Limit (Programmable) at Light-Load Condition

Simple Remote On/Off Control with Latch or Auto-Restart (A/R) Using FI or LS Pin

Protection Functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current

Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD), and High Precise Line Under-Voltage Lockout (LUVLO)

Level-Change OCP Function During Startup

Applications

PDP and LCD TVs

Desktop PCs and Servers

Video Game Consoles

Adapters

Telecom Power Supplies