Fairchild's FSL4110LR 1000V Integrated Power Switch is an integrated pulse width modulation (PWM) controller and 1000V avalanche rugged SenseFET specifically designed for high input voltage offline Switching Mode Power Supplies (SMPS) with minimal external components. VCC can be supplied through integrated high-voltage power regulator without auxiliary bias winding. The integrated PWM controller includes a fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading-Edge Blanking (LEB), optimized gate driver, soft-start, temperature-compensated precise current sources for loop-compensation, and variable protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSL4110LR reduces total cost, component count, PCB size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform for cost-effective design of a flyback converter.
Feature
- Built-in avalanche rugged 1000V SenseFET
- 50kHz Precise fixed operating frequency
- VCC can be supplied from either bias-winding or self-biasing
- Soft burst-mode operation minimizing audible noise
- Random frequency fluctuation for low EMI
- Pulse-by-pulse current limit
- Built-in internal startup and soft-start circuit
- Fixed 1.6s Restart time for safe auto-restart mode of all protections
- Overload protection (OLP)
- Over-voltage protection (OVP)
- Abnormal over-current protection (AOCP)
- Internal thermal shutdown (TSD) with hysteresis
- Under-voltage lockout (UVLO) and line over-voltage protection (LOVP) with hysteresis
