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This literature is subject to all applicable copyright laws and is not for resale in any manner.TM FSDM311A Green Mode Fairchild Power Switch (FPS ) November 2007 FSDM311A Green Mode Fairchild Power Switch (FPS) Features Description The FSDM311A consists of an integrated Pulse Width Internal Avalanche-Rugged SenseFET Modulator (PWM) and SenseFET, and is specifically Precision Fixed Operating Frequency: 67KHz designed for high-performance, off-line, Switch-Mode Power Supplies (SMPS) with minimal external Consumes Under 0.2W at 265V & No Load with AC components. This device is an integrated high-voltage Advanced Burst-Mode Operation power switching regulator that combines a VDMOS Internal Start-up Circuit SenseFET with a voltage-mode PWM control block. The integrated PWM controller features include a fixed Pulse-by-Pulse Current Limiting oscillator, Under-Voltage Lockout (UVLO) protection, Over-Voltage Protection (OVP) Leading-Edge Blanking (LEB), an optimized gate turn- on/turn-off driver, Thermal Shutdown (TSD) protection, Overload Protection (OLP) and temperature-compensated precision-current Internal Thermal Shutdown Function (TSD) sources for loop compensation and fault protection circuitry. When compared to a discrete MOSFET and Auto-Restart Mode controller or RCC switching converter solution, the Under-Voltage Lockout (UVLO) with Hysteresis FSDM311A device reduces total component count and design size and weight, while increasing efficiency, Built-in Soft-Start productivity, and system reliability. This device provides Secondary-Side Regulation a basic platform that is well suited for the design of cost-effective flyback converters. Applications Related Resources Charger & Adapter for Mobile Phone, PDA, & MP3 AN-4134: Design Guidelines for Off-line Forward Auxiliary Power for White Goods, PC, C-TV, & Converters Using Fairchild Power Switch (FPS) Monitors AN-4137: Design Guidelines for Off-line Flyback Converters Using Fairchild Power Switch (FPS) AN-4138: Design Considerations for Battery Charger Using Green Mode Fairchild Power Switch (FPS) AN-4140: Transformer Design Consideration for Off- line Flyback Converters Using Fairchild Power Switch (FPS) AN-4141: Troubleshooting and Design Tips for Fairchild Power Switch (FPS) Flyback Applications AN-4147: Design Guidelines for RCD Snubber of Flyback AN-4148: Audible Noise Reduction Techniques for FPS Applications Ordering Information Product Number Package Marking Code BV f R DSS OSC DS(ON) FSDM311A 8DIP DM311A 650V 67KHz 14 All packages are lead free per JEDEC: J-STD-020B standard. FPS is a trademark of Fairchild Semiconductor Corporation. 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com FSDM311A Rev.1.0.2