FSQ211

FSQ211 ⎯ Green Mode Fairchild Power Switch (FPSTM) April 2007 FSQ211 Green Mode Fairchild Power Switch (FPSTM) Features ƒ Internal Avalanche-Rugged SenseFET ƒ Precision Fixed Operating Frequency (67KHz) ƒ Burst-Mode Operation ƒ Internal Start-up Circuit ƒ Pulse-by-Pulse Current Limiting ƒ Overload Protection (OLP) ƒ Internal Thermal Shutdown Function (TSD) ƒ Auto-Restart Mode ƒ Under-Voltage Lockout (UVLO) with Hysteresis ƒ Built-in Soft-Start ƒ Secondary-Side Regulation Applications ƒ Charger & Adapter for Mobile Phone, PDA, & MP3 ƒ Auxiliary Power for White Goods, PC, C-TV, & Monitor Description The FSQ211 consists of an integrated Pulse Width Modulator (PWM) and SenseFET, specifically designed for high-performance, off-line Switch Mode Power Supplies (SMPS) with minimal external components. This device is an integrated high-voltage power switching regulator that combines a VDMOS SenseFET 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 compensated precision-current sources for loop compensation and fault protection circuitry. When compared to a discrete MOSFET and controller or RCC switching converter solution, the FSQ211 device reduces total component count and design size and weight, while increasing efficiency, productivity, and system reliability. T...