Description

The FSL126MRT is an integrated Pulse Width Modulation (PWM) controller and SenseFET specifically designed for offline Switch-Mode Power Supplies (SMPS) with minimal external components. The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading Edge Blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current sources for loop compensation, and self-protection circuitry.

Features

 Internal Avalanched Rugged 650V SenseFET

 Advanced Soft Burst-Mode Operation for Low Standby Power and Low Audible Noise

 Random Frequency Fluctuation for Low EMI

 Pulse-by-Pulse Current Limit

 Various Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis and Under-Voltage Lockout (UVLO) with Hysteresis

 Low Operating Current(0.4mA) in Burst Mode

 Internal Startup Circuit

 Built-in Soft-Start: 15ms

 Auto-Restart Mode

Applications

 Power Supply for STB Home Appliances, and DVD Combination