Description

The highly integrated FAN6791/3 dual PWM combination controller provides several features to enhance the performance of converters.

Features

High-Voltage Startup

Low Operating Current

Interleaved Stand-by PWM / Forward PWM Switching

Green Mode Stand-by PWM / Forward PWM

Linearly Decreasing Stand-by PWM Frequency to 20kHz

Remote On / Off

AC Brownout Protection

Forward PWM with Soft-Start

Frequency Hopping to Reduce EMI Emissions

Cycle-by-Cycle Current Limiting for Stand-by PWM / Forward PWM

Leading-Edge Blanking for Stand-by PWM / Forward PWM

Synchronized Slope Compensation for Stand-by PWM / Forward PWM

GATE Output Maximum Voltage Clamp

VDDOver-Voltage Protection (OVP)

VDDUnder-Voltage Lockout (UVLO)

Internal Open-Loop Protection for Stand-by PWM / Forward PWM

Constant Power Limit for Stand-by PWM / Forward PWM

Applications

General-purpose switch-mode power supplies and flyback power converters, including:

PC-ATX Power Supplies