FSDM311

www.fairchildsemi.com FSDM311 Features Green Mode Fairchild Power Switch (FPSTM) Internal Avalanche Rugged Sense FET Precision Fixed Operating Frequency (67kHz) Advanced Burst-Mode operation Consumes under 0.2W at 265Vac and no load Internal Start-up Switch and Soft Start Under Voltage Lock Out (UVLO) with Hysteresis Pulse by Pulse Current Limit Over Load Protection (OLP) Over Voltage Protection (OVP) Internal Thermal Shutdown Function (TSD) Secondary Side Regulation Auto-Restart Mode TYPICAL POWER CAPABILITY PRODUCT FSDM311 FSDM311L Open Frame 230VAC ±15%(1) 20W 20W 85-265VAC 12W 12W Table 1. Notes: 1. 230 VAC or 100/115 VAC with doubler. Typical Circuit Applications Charger & Adaptor for Mobile Phone, PDA & MP3 Auxiliary Power for White Goods, PC, C-TV & Monitor AC IN DC OUT Vstr Drain Description The FSDM311 is an integrated Pulse Width Modulator (PWM) and Sense FET specially designed for high performance off-line Switch Mode Power Supplies (SMPS) with minimal external components. This device is a monolithic high voltage power switching regulator which combines an VDMOS Sense FET with a voltage mode PWM control block. The integrated PWM controller features include: a fixed oscillator, Under Voltage Lock Out (UVLO) protection, Leading Edge Blanking (LEB), optimized gate turn-on/ turn-off driver, thermal shut down protection (TSD), temperature compensated precision current sources for loop compensation and fault protection circuitry. Whe...