Analog Devices Inc. ADP1974 PWM Controllers

Analog Devices ADP1974 PWM Controllers are designed as a constant frequency, voltage mode, synchronous, pulse-width modulation (PWM) controller for bidirectional DC-to-DC applications. The controllers are designed for use in battery testing, formation, and conditioning applications with an external, high voltage field-effect transistor (FET) half-bridge driver, and an external control device. ADP1974 performs as a buck converter in battery-charge mode and as a boost converter in discharge mode to recycle energy to the input bus. The controller's high voltage V_IN supply pin can withstand a maximum operating voltage of 60V and reduces the need for additional system supply voltages. The ADP1974 also has a COMP pin to provide external control of the PWM duty cycle and a FAULT pin that can disable the DH and DL outputs. Features include precision enable, internal and external synchronization control with programmable phase shift, programmable maximum duty cycle, dead-time control, and peak hiccup current-limit protection. Additional protection features include soft start to limit input inrush current during startup, precision enables, and thermal shutdown (TSD).