FAN6210MY

FAN6210 — Primary-Side Synchronous Rectifier (SR) Trigger Controller for Dual Forward Converter March 2010 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 VDD Over-Voltage Protection (OVP) Description FAN6210 is a primary-side SR trigger Integrated Circuit (IC) specially designed for the synchronous rectifier (SR) in dual forward converters employing FAN6206. 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. Applications Personal Computer (PC) Power Supply Entry-Level Server Power Supply Ordering Information Part Number FAN6210MY Operating Temperature Range -40°C to +105°C Eco Status Green Package 8-Pin Small Outline Package (SOP) Packing Method Tape & Reel For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2009 Fairchild Semiconductor Corporation FAN6210 Rev. 1.0.2 www.fairchildsemi.com FAN6210 — Primary-Side Synchronous Rectifier (SR) Trigger Controller for Dual Forward Converter Application Diagram Figure 1. Typical Application Internal Block Diagram Rising/Falling Delay SIN 3 Green Mode (D