A3964

A3964 Dual Full-Bridge PWM Motor Driver Features and Benefits ▪ ±800 mA continuous output current rating ▪ 30 V output voltage rating ▪ Internal PWM current control, saturated sink drivers ▪ Internally generated, precision 2.5 V reference ▪ Internal transient-suppression diodes ▪ Internal thermal-shutdown circuitry ▪ Crossover-current protection, UVLO protection Package: 20 pin SOIC (suffix LB) Not to scale Description Designed for pulse width modulated (PWM) current control of bipolar stepper motors, the A3964 is capable of continuous output currents to ±800 mA and operating voltages to 30 V. Internal fixed off-time PWM current-control circuitry can be used to regulate the maximum load current to a desired value. An internal precision voltage reference is provided to improve motor peak-current control accuracy. The peak load current limit is set by the user’s selection of an external resistor divider and current-sensing resistors. The fixed off-time pulse duration ...