FSL106MR: 650V Integrated Power Switch with 67kHz frequency and adjustable current limit for 8W offline flyback converters

The FSL106MR integrates a Pulse Width Modulator (PWM) and SenseFET is specifically designed for high-performance offline Switch-Mode Power Supplies (SMPS) with minimal external components. FSL106MR includes integrated high-voltage power switching regulators that combine an avalanche-rugged SenseFET with a current-mode PWM control block.     The integrated PWM controller features include: Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), a frequency generator for EMI attenuation, an optimized gate turn-on/turn-off driver, Thermal Shutdown (TSD) protection, and temperature-compensated precision current sources for loop compensation and fault protection circuitry. The FSL106MR offers good soft-start performance. When compared to a discrete MOSFET and controller or RCC switching converter solution, the FSL106MR reduces total component count, design size, and weight; while increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for the design of cost-effective flyback converters.

Features

• Internal Avalanche-Rugged SenseFET: 650V
• Under 50mW Standby Power Consumption at 265V_AC, No-Load Condition with Burst Mode
• Precision Fixed Operating Frequency with Frequency Modulation for Attenuating EMI
• Internal Startup Circuit
• Built-in Soft-Start: 15ms
• Pulse-by-Pulse Current Limiting
• Various Protections: Over-Voltage Protection (OVP), Overload Protection (OLP), Output-Short Protection (OSP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown Function with Hysteresis (TSD)
• Auto-Restart Mode
• Under-Voltage Lockout (UVLO)
• Low Operating Current: 1.8mA
• Adjustable Peak Current Limit

Application Notes