A3989 Bipolar Stepper and High Current DC Motor Driver
Features and Benefits
▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ 36 V output rating 2.
4 A dc motor driver 1.
2 A bipolar stepper driver Synchronous rectification Internal undervoltage lockout (UVLO) Thermal shutdown circuitry Crossover-current protection Very thin profile QFN package
Description
The A3989 is designed operate at voltages up to 36 V while driving one bipolar stepper motor, at currents up to 1.
2A, and one dc motor, at currents up to 2.
4 A.
The A3989 includes a fixed off-time pulse width modulation (PWM)
regulator for current control.
The stepper motor driver features dual 2-bit nonlinear DACs (digital-to-analog converters) that enable control...