3966 Datasheet (Allegro MicroSystems) - DUAL FULL-BRIDGE PWM MOTOR DRIVER

3966, DUAL FULL-BRIDGE PWM MOTOR DRIVER

Internal PWM Current Control.

The A3966SA and A3966SLB dual H-bridges are designed to drive both windings of a bipolar stepper motor.

Load current can be controlled in each motor winding by an internal fixedfrequency PWM control circuit.

The current-control circuitry works as follows: when the outpu

Data Sheet 29319.25A† 3966 A3966SLB OUT1A PHASE 1 ENABLE 1 GROUND SENSE1 OUT 1B LOAD SUPPLY REFERENCE 1 V 2 3 4 5 6 7 8 V V BB VCC RC LOGIC LOGIC BB DUAL FULL-BRIDGE PWM MOTOR DRIVER The A3966SA and A3966SLB are designed to drive both windings of a two-phase bipolar stepper motor.

Each device includes two H-bridges capable of continuous output currents of ±650 mA and operating voltages to 30 V.

Motor winding current can be controlled by the internal fixed-frequency, pulse-width modulated (PWM)

3966 Features

* I I I I I I I I ±650 mA Continuous Output Current 30 V Output Voltage Rating Internal Fixed-Frequency PWM Current Control Satlington™ Sink Drivers User-Selectable Blanking Window Internal Ground-Clamp & Flyback Diodes Internal Thermal-Shutdown Circuitry Crossover-Current Protection and UVLO Protecti