UC3717A - Stepper Motor Drive Circuit

Unitrode

General Description

The UC3717A is an improved version of the UC3717, used to switch drive the current in one winding of a bipolar stepper motor.

Key Features

Full-Step, Half-Step and Micro-Step Capability.
Bipolar Output Current up to 1A.
Wide Range of Motor Supply Voltage 10-46V.
Low Saturation Voltage with Integrated Bootstrap.
Built-In Fast Recovery Commutating Diodes.
Current Levels Selected in Steps or Varied Continuously.
Thermal Protection with Soft Intervention.

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UC3717A stepper motor drive circuit by Unitrode - Datasheet Preview

Datasheet Details

Part number	UC3717A
Manufacturer	Unitrode
File Size	636.28 KB
Description	Stepper Motor Drive Circuit
Datasheet	UC3717A Datasheet

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UC3717A Stepper Motor Drive Circuit FEATURES • Full-Step, Half-Step and Micro-Step Capability • Bipolar Output Current up to 1A • Wide Range of Motor Supply Voltage 10-46V • Low Saturation Voltage with Integrated Bootstrap • Built-In Fast Recovery Commutating Diodes • Current Levels Selected in Steps or Varied Continuously • Thermal Protection with Soft Intervention DESCRIPTION The UC3717A is an improved version of the UC3717, used to switch drive the current in one winding of a bipolar stepper motor. The UC3717A has been modified to supply higher winding current, more reliable thermal protection, and improved efficiency by providing integrated bootstrap circuitry to lower recirculation saturation voltages. The diagram shown below presents the building blocks of the UC3717A.