UC3717AQ

Overview

The UC3717AQ is a bipolar stepper motor driver manufactured by Texas Instruments. It features two half-bridge outputs capable of delivering 1A per channel. The device operates with a logic supply voltage range of 4.75V to 5.25V and supports load voltages from 10V to 46V. It utilizes a 20-PLCC (9x9mm) surface-mount package. The component includes an integrated bootstrap circuit for high-side drive and provides overtemperature fault protection.

Feature Summary

• Integrated bootstrap circuit for efficient high-side gate driving
• Built-in overtemperature fault protection mechanism
• Designed specifically for bipolar stepper motor applications

Applications

• General purpose stepper motor control systems
• Bipolar stepper motor drive circuits

Procurement Notes

Verify the current lifecycle status, as this part may be obsolete or discontinued. Confirm availability through authorized distributors only. Ensure the 20-PLCC package footprint matches the design requirements. Check for valid replacement options if production continuity is required.

Selection Notes

Select this component for designs requiring a dedicated bipolar stepper driver in a compact surface-mount form factor. Ensure the system logic voltage aligns with the specified 4.75V to 5.25V range. Verify that the load voltage does not exceed the 46V maximum rating.

Part Context

This device belongs to the UC3717 family of motor controllers. It serves as a specialized interface between low-voltage logic controllers and bipolar stepper motors, providing the necessary current amplification and bridge configuration for motor phase excitation.

Replacement Considerations

The UC3717AN is listed as a similar alternative part number.