3964 Datasheet (Allegro MicroSystems) - DUAL FULL-BRIDGE PWM MOTOR DRIVER

3964, DUAL FULL-BRIDGE PWM MOTOR DRIVER

Internal PWM Current Control.

The A3964SB and A3964SLB contain a fixed off-time pulse-width modulated (PWM) current-control circuit that can be used to limit the load current to a desired value.

The peak value of the current limiting (ITRIP) is set by the selection of an external current-sensing res

3964 DUAL FULL-BRIDGE PWM MOTOR DRIVER 3964 Designed for pulse-width modulated (PWM) current control of bipolar stepper motors, the A3964SB and A3964SLB are 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

3964 Features

* s s s s s s s ±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 Protecti