南芯SOUTHCHIP SC3501SAER SOT23-6
Description
SC3501 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. The SR conduction voltage drop is continuously
monitored to minimize the conduction loss. The extremely
fast turn-off comparator and driving circuitry ensures the
safety of the SR MOSFET, even in current continuous mode
(CCM) condition.
The IC can work well in wide output voltage range, even in
short circuit conditions. The patented turn on detection
circuity prevents SR turn on when Vds rings severely. The
wide VDD range and gate driver technology make the
controller ideal for wide output voltage range applications,
such as adapters, chargers, USB Power Delivery (USB-PD),
etc.
This chip supports both high side rectification and low side
rectification.