A new quad DMOS full-bridge driver IC has been introduced from Allegro MicroSystems, which is capable of driving up to two stepper motors or four DC motors. Each full-bridge output is rated up to 1.6A and 40V. Allegro’s A5990 includes fixed off-time pulse-width modulation (PWM) current regulators, along with 2- bit nonlinear DACs (digital-to-analog converters) that allow stepper motors to be controlled in full, half, and quarter steps, and DC motors in forward, reverse, and coast modes.