FSQ211 Datasheet | Fairchild Semiconductor

Features - Internal Avalanche-Rugged Sense FET - Precision Fixed Operating Frequency (67KHz) - Burst-Mode Operation - Internal Start-up Circuit - Pulse-by-Pulse Current Limiting - Overload Protection (OLP) - Internal Thermal Shutdown Function (TSD) - Auto-Restart Mode - Under-Voltage Lockout (UVLO) with Hysteresis - Built-in Soft-Start - Secondary-Side Regulation Applications - Charger & Adapter for Mobile Phone, PDA, & MP3 - Auxiliary Power for White Goods, PC, C-TV, & Monitor Description The FSQ211 consists of an integrated Pulse Width Modulator (PWM) and Sense FET, specifically designed for high-performance, off-line Switch Mode Power Supplies (SMPS) with minimal external ponents. This device is an integrated high-voltage power switching regulator that bines a VDMOS Sense FET with a voltage mode PWM control block. The integrated PWM controller features include a fixed oscillator, Under Voltage Lockout (UVLO) protection, Leading Edge Blanking (LEB), an optimized gate turn-on/turn-off driver, Thermal Shutdown (TSD) protection, and temperature pensated precision-current sources for loop pensation and fault protection circuitry. When pared to a discrete MOSFET and controller or RCC switching converter solution, the FSQ211 device reduces total ponent count and design size and weight, while increasing efficiency, productivity, and system reliability. This device provides a basic platform well suited for cost-effective flyback converters. Related Application Notes - AN-4137 Design Guidelines for Off-line Flyback Converters using FPS™ - AN-4141 Troubleshooting and Design Tips for Fairchild Power Switch (FPS™) Flyback Applications - AN-4147 Design Guidelines for RCD Snubber of Flyback - AN-4134Design Guidelines for Off-line Forward Converters using FPS™ - AN-4138Design Considerations for Battery Charger Using Green Mode Fairchild Power Switch (FPS™) Ordering Information Part Number FSQ211 FSQ211L Package 8DIP 8LSOP Top Mark Q211 Q211L BVDSS 650V 650V f OSC 67KHz...