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This literature is subject to all applicable copyright laws and is not for resale in any manner.FSQ500L Compact, Green Mode, Fairchild Power Switch (FPS) April 2012 FSQ500L Compact, Green Mode, Fairchild Power Switch (FPS) Features Description The FSQ500L is specially designed for a replacement of Single Chip 700V SenseFET Power Switch linear power supplies with low cost. This device Precision Fixed Operating Frequency: 130kHz combines current-mode Pulse Width Modulator (PWM) with a senseFET. The integrated PWM controller No-load consumption 250mW at 265V with AC features include: a fixed oscillator, Under Voltage Burst Mode and Down to 60mW with External Bias Lockout (UVLO) protection, Overload Protection (OLP), Internal Startup Switch Leading-Edge Blanking (LEB), an optimized gate turn- on/turn-off driver, Thermal Shutdown (TSD) protection Soft-Start Time Tuned by External Capacitor with hysteresis, and temperature-compensated Under-Voltage Lockout (UVLO) with Hysteresis precision-current sources for loop compensation. When compared to a linear power supply, the FSQ500L device Pulse-by-Pulse Current Limit reduces total size and weight, while increasing Overload Protection (OLP) and Internal Thermal efficiency, productivity, and system reliability. This Shutdown Function (TSD) with Hysteresis device provides a basic platform for cost-effective flyback converters. Auto-Restart Mode No Need for Auxiliary Bias Winding Applications Cost-Effective Linear Power Supplies Replacement Charger and Adapter for Mobile Phone, PDA, MP3, (1) and Cordless Phone Maximum Output Power (2) 230V 15% 85-265V AC AC Related Resources Open Open (3) (3) AN4137 Design Guidelines for Off-line Flyback Adapter Adapter (4) (4) Frame Frame Converters Using Fairchild Power Switch (FPS) 2.5W 3.0W 2.0W 2.5W AN4141 Troubleshooting and Design Tips for Fairchild Power Switch (FPS) Flyback Notes: Applications 1. The junction temperature can limit the maximum output power. AN-4147 Design Guidelines for RCD Snubber of 2. 230V or 100/115V with doubler. AC AC Flyback Converters 3. Typical continuous power in a non-ventilated AN-6075 Compact Green Mode Adapter Using enclosed adapter measured at 50C ambient. FSQ500L for Low Cost 4. Maximum practical continuous power in an open frame design at 50C ambient. AN-4138 Design Considerations for Battery Charger Using Green Mode Fairchild Power Switch (FPS) Evaluation Board: FEBFSQ500L Ordering Information Operating Part Number Package Packing Method Temperature Range FSQ500L -40C to +85C 4-Lead, Small Outline Package (SOT223-4L) Tape & Reel 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FSQ500L Rev. 1.0.3