A3976 is a high performance dual H-bridge motor driver that can be used to drive bipolar stepper motors or to bidirectionally control 2 DC Motors. A3976 uses full digital control and has high drive capacity and high reliability. The device has multiple protections such as output current, voltage, temperature, etc., which are suitable for use in harsh automotive application environments.
The Allegro A3976 is a dual full bridge protected motor driver designed to drive both windings of a bipolar stepper motor or bidirectionally control two DC motors. It features continuous output currents of up to +/- 500 mA and operating voltages to 30V, with free wheeling diodes included for output transient suppression.
The device is protected to ensure safe operation in harsh environments, specifically designed for automotive applications. Protection circuitry monitors for open or shorted loads, motor lead shorts, VBB overvoltage, VCC undervoltage, and thermal shutdown, outputting fault information to diagnostic pins.
The device supports continuous output currents of up to +/- 500 mA.
The outputs will be disabled and fault information will be output to diagnostic pins FAULT1 and FAULT2.
It is recommended that the inductive load be less than 38mH to prevent false open load reports.