ANALOG DEVICES DC1929A

DC1929A demonstration circuit is a 200W active clamp forward converter featuring the LT®3752-1/LT8311 chipset. It operates at 100KHz and produces a regulated 12V O/P from an I/P voltage ranging from 150 to 400V, making it well-suited for automotive, industrial, and other applications. The LT3752-1 is a current mode PWM controller optimized for a forward converter with a high-side active clamp transformer reset. An accurate, programmable volt-second clamp allows primary switch duty cycles above 50% for better utilization of switch, transformer and rectifier. The AOUT control signal can be used to power a gate drive transformer, level-shift driver, or opto-coupler driver for the high-side N-channel FET. The SOUT controls the secondary side synchronous rectification. The integrated housekeeping flyback controller brings great convenience for both primary and secondary bias circuits. During its soft-start and soft-stop, LT3752-1 folds back switching frequency and duty-ratio clamp.