3961 Datasheet - Allegro MicroSystems

3961 DUAL FULL-BRIDGE PWM MOTOR DRIVER

Internal PWM Current Control. The A3961S * contains a fixed off-time pulse-width modulated (PWM) currentcontrol 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 resistor.

3961 DUAL FULL-BRIDGE PWM MOTOR DRIVER 3961 Designed for pulse-width modulated (PWM) current control of bipolar stepper motors, the A3961S is capable of continuous output currents to ±800 mA and operating voltages to 45 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 us.

3961 Features

* s s s s s s s ±800 mA Continuous Output Current Rating 45 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

3961 Datasheet (91.24 KB)