September 2009

© 2009 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN6210 Rev. 1.0.1

FAN6210

Primary-Side Synchronous Rectifier (SR) Trigger Controller

for Dual Forward Converter

Features

Primary-Side Trigger Controller for Dual Forward

Converters with Synchronous Rectifier (SR)

Specialized SR Controller for Dual Forward

Converter

Programmable Turn-on Delay Time for the

Powering SR (RDLY Pin)

Winding Voltage Detection for Precision Control at

Light-Load Condition (DET Pin)

Green-Mode Operation to Improve Light-Load

Efficiency

Differential Mode Control Signal with Better Noise

Immunity

Applications

Personal Computer (PC) Power Supply

Entry-Level Server Power Supply

Description

FAN6210 is a primary-side trigger Integrated Circuit (IC)

specially designed for the synchronous rectifier (SR) in

dual forward converters employing FSR660/630.

FAN6210 provides drive signal for the primary-side

power switches by using an output signal from PWM

controller. FAN6210 can be combined with any PWM

controller that can drive a dual-forward converter. To

obtain optimal timing for the SR drive signals,

transformer winding voltage is also monitored. To

improve light-load efficiency, green mode operation is

employed, which disables the SR turn-on trigger signal,

minimizing gate drive power consumption at light load.

FAN6210 is available in 8-pin SOP package.

Ordering Information

Part Number

Operating

Temperature Range

Eco Status

Package

Packing Method

FAN6210MY

-40°C to +105°C

Green

8-Pin Small Outline

Package (SOP)

Tape & Reel