LNK521PN

Introduction The single-ended forward converter topology is usually the best solution for DC-DC applications in industrial controls, Telecom central office equipment, digital feature phones, and systems that use distributed power architectures. The feature set of DPA-Switch offers the following advantages in DC-DC single-ended forward converter designs: • Low component count • High efficiency (typically >91% with synchronous rectification) • Built in soft-start to minimize stress and overshoot • Built in accurate line under-voltage detection • Built-in accurate line overvoltage shutdown protection • Built in adjustable current limit • Built-in overload and open loop fault protection • Built-in thermal shutdown • Programmable duty cycle reduction to limit duty cycle excursion at high line and transient load conditions • Very good light-load efficiency • Selectable 300 kHz or 400 kHz operation • Lossless integrated cycle-by-cycle current limit