DM311A

FSDM311A — Green Mode Fairchild Power Switch (FPSTM) November 2007 FSDM311A Green Mode Fairchild Power Switch (FPS™) Features ƒ Internal Avalanche-Rugged SenseFET ƒ Precision Fixed Operating Frequency: 67KHz ƒ Consumes Under 0.2W at 265VAC & No Load with Advanced Burst-Mode Operation ƒ Internal Start-up Circuit ƒ Pulse-by-Pulse Current Limiting ƒ Over-Voltage Protection (OVP) 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, & Monitors Description The FSDM311A consists of an integrated Pulse Width Modulator (PWM) and SenseFET, and is 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 turnon/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 FSDM311A device reduces total componen...