SC3503 Overview
SC3503 is a smart secondary-side driver IC designed to drive N-Channel power MOSFET used as synchronous rectifiers in isolated flyback converters. The MOSFET can replace Schottky diode so the system can achieve higher efficiency and superior heat dissipation performance. The SR MOSFET is turned on when VDS falls below turn-on threshold, and turned off when VDS exceeds turn-off threshold.
SC3503 Key Features
- High output voltage up to 22V
- Wide output range, even down to 0V
- No need of auxiliary winding for power supply
- Patented programmable turn on detection circuitry
- pliant with multiple types of MOSFETs
- High efficiency can meet CoC V5 and DoE VI
- 10nS turn off propagation delay
- High switching frequency up to 1MHz
- Extremely low quiescent current leads to low stand by
- Supports DCM, CCM, and Quasi-Resonant mode