Maxim MAX17598/99 Current-Mode PWM Controllers
Maxim Integrated MAX17598 / MAX17599 low IQ, active clamp current-mode PWM controllers contain all the control circuitry required for the design of wide-input isolated/nonisolated forward-converter industrial power supplies. MAX17598 is designed for universal input (rectified 85V AC to 265V AC) or telecom (-36V DC to -72V DC) power supplies. MAX17599 is optimized for low-voltage industrial supplies (4.5V DC to 30V DC). These Maxim Integrated devices include an AUX driver that drives an auxiliary MOSFET (clamp switch) that helps implement the active-clamp transformer reset topology for forward converters. Such a reset topology has several advantages, including reduced voltage stress on the switches, transformer size reduction due to larger allowable flux swing, and improved efficiency due to elimination of dissipative snubber circuitry. Programmable dead time between the AUX and main driver allows for zero voltage switching (ZVS).