3976 Datasheet (Allegro MicroSystems) - DUAL FULL BRIDGE PROTECTED MOTOR DRIVER

3976, DUAL FULL BRIDGE PROTECTED MOTOR DRIVER

Motor Supply Voltage Control Logic * Bridge 1 Control Logic * Bridge 1 Power Ground Return Bridge 1 Output Diagnostic Output Bridge 1 Output Bridge 2 Output Diagnostic Output Bridge 2 Output Control Logic * Bridge 2 Control Logic * Bridge 2 Logic Supply No Connect 24

Page 1 of 5 3976 ADVANCED DATASHEET - 02/19/99 (Subject to change without notice) DUAL FULL BRIDGE PROTECTED MOTOR DRIVER The A3976 is designed to drive both windings of a bipolar stepper motor or bidirectionally control two DC Motors.

Both H-Bridges are capable of continuous output currents of up to +/- 500 mA and operating voltages to 30V.

Free wheeling, substrate isolated diodes are included for output transient suppression when switching motors or other inductive loads.

For each bridge the

3976 Features

* n n n n n n n n n n n 30 V , ±500 mA Continuous Output Rating 35V Load Dump Survival Output Short Circuit Protection Coded Fault Diagnostic Outputs Low Current Standby Mode Open Load Monitor Low Current Standby Mode VBB Over Voltage Shutdown Internal Thermal Shutdown Circuitry Internal Low Parasitic