A3916GESTR-T-1

Overview

The A3916GESTR-T-1 is a dual bipolar stepper or brushed DC motor driver IC from Allegro MicroSystems. It features integrated PWM current control with fixed off-time regulation, determining peak winding current via an external resistor. The device operates on a single power supply ranging from 2.7V to 15V for both logic and load. It utilizes DMOS technology in a 20-WFQFN package with an exposed thermal pad. Key electrical parameters include a 1A output current per channel, parallel interface, and four half-bridge outputs. The operational junction temperature range spans from -40°C to 150°C.

Feature Summary

• Integrates full motor control functions including PWM current regulation and protection diagnostics within a single chip.
• Supports low-voltage operation suitable for single-cell lithium-ion or multi-battery configurations without requiring external LDO regulators.
• Provides diagnostic output signals indicating overtemperature and overcurrent events to ensure system safety.

Applications

• Office automation equipment
• Industrial automation systems
• Retail point-of-sale terminals
• Medical devices

Procurement Notes

Verify the specific suffix designation against the manufacturer's official documentation to confirm pinout compatibility and thermal performance characteristics. Ensure that the selected packaging format aligns with automated assembly requirements. Cross-reference the component marking code with the datasheet to authenticate the source and prevent counterfeit components during acquisition.

Selection Notes

Choose this component when designing circuits requiring precise current control for bipolar stepper motors or dual brushed DC loads within a compact footprint. The integrated charge pump simplifies design by reducing external component count. Consider the exposed pad thermal requirements for high-duty cycle applications to maintain junction temperatures within specified limits.

Part Context

This part belongs to the A3916 series of low-voltage motor drivers designed for portable and space-constrained applications. It offers a pin-compatible alternative to other variants in the family, such as those in smaller QFN packages, while providing enhanced thermal dissipation through its larger 20-pin form factor.

Replacement Considerations

The A3916GES variant serves as a pin-compatible alternative in a smaller 16-pin QFN package. Verify thermal management capabilities and physical board space constraints before substituting, as the package dimensions differ significantly between the 20-pin and 16-pin versions.