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This literature is subject to all applicable copyright laws and is not for resale in any manner.FSL126MRT Green-Mode Fairchild Power Switch (FPS) May 2012 FSL126MRT Green-Mode Fairchild Power Switch (FPS) Features Description The FSL126MRT is an integrated Pulse Width Internal Avalanched Rugged 650V SenseFET Modulation (PWM) controller and SenseFET specifically Advanced Soft Burst-Mode Operation for Low designed for offline Switch-Mode Power Supplies Standby Power and Low Audible Noise (SMPS) with minimal external components. The PWM controller includes an integrated fixed-frequency Random Frequency Fluctuation for Low EMI oscillator, Under-Voltage Lockout (UVLO), Leading- Pulse-by-Pulse Current Limit Edge Blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current Various Protection Functions: Overload Protection sources for loop compensation, and self-protection (OLP), Over-Voltage Protection (OVP), Abnormal circuitry. Compared with a discrete MOSFET and PWM Over-Current Protection (AOCP), Internal Thermal controller solution, the FSL126MRT can reduce total Shutdown (TSD) with Hysteresis and Under-Voltage cost, component count, size, and weight while Lockout (UVLO) with Hysteresis simultaneously increasing efficiency, productivity, and Low Operating Current(0.4mA) in Burst Mode system reliability. This device provides a basic platform suited for cost-effective design of a flyback converter. Internal Startup Circuit Built-in Soft-Start: 15ms Auto-Restart Mode Applications Power Supply for STB Home Appliances, and DVD Combination Ordering Information (2) Output Power Table Operating (3) Part Current R 230V 15% 85~265V DS(ON) AC AC Package Junction Replaces Device Number Limit (Max.) Temperature Open Open (4) (4) Adapter Adapter (5) (5) Frame Frame TO-220F -40C ~ (1) 6-Lead FSL126MRT 1.2A 6.2 30W 40W 17W 25W KA5M0265RYDTU +125C W-Forming Notes: 1. Pb-free package per JEDEC J-STD-020B. 2. The junction temperature can limit the maximum output power. 3. 230V or 100/115V with voltage doubler. AC AC 4. Typical continuous power in a non-ventilated enclosed adapter measured at 50C ambient temperature. 5. Maximum practical continuous power in an open-frame design at 50C ambient temperature. 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com FSL126MRT Rev. 1.0.0