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3976 - DUAL FULL BRIDGE PROTECTED MOTOR DRIVER

General Description

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

Key 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 Free Wheeling Diodes Crossover Current Protection PART NUMBER A3976KLB A3973KB.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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 PHASE input controls load current polarity by selecting the appropriate source and sink driver pair. The ENABLE input, when held high, enables the respective output H-bridge. When both ENABLE pins are held low the device will enter SLEEP mode and consume less than 100µA.