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Product Detailed Parameters
- Description：IC MOTOR DRIVER 2.5V-9V 16QFN
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Motor Type - Stepper：-
- Motor Type - AC, DC：Brushed DC
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (2)
- Interface：Parallel
- Technology：DMOS
- Step Resolution：-
- Applications：General Purpose
- Current - Output：1A
- Voltage - Supply：2.5V ~ 9V
- Voltage - Load：2.5V ~ 9V
- Operating Temperature：-20°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-WFQFN Exposed Pad
- Supplier Device Package：16-QFN/MLP (3x3)
- Grade：-
- Qualification：-
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Overview
The A3918SESTR-T is a low-voltage stepper or dual DC motor driver manufactured by Allegro MicroSystems. It integrates control logic, DMOS power stages, and protection circuits into a single package. The device supports parallel interface operation with a supply voltage range of 2.5V to 9V. It features integrated PWM current control with fixed off-time regulation. The output configuration consists of two half-bridges capable of delivering up to 1A per channel. It utilizes a 16-WFQFN (3x3mm) package with an exposed pad for thermal management.
Feature Summary
- Integrates full control logic and DMOS power stages for simplified design
- Provides integrated PWM current control with fixed off-time regulation
- Includes diagnostic output signals for overcurrent and overtemperature events
Applications
- Low voltage bipolar stepper motors
- Dual brushed DC motor drives
- Battery-powered automation systems
Procurement Notes
Verify the specific suffix 'SESTR-T' corresponds to the 16-QFN/MLP(3x3) package variant. Confirm RoHS compliance status and moisture sensitivity level requirements against project specifications. Ensure the ordering quantity aligns with manufacturer standard packaging configurations. Cross-reference the datasheet revision history for any recent packaging or electrical parameter updates prior to final procurement.
Selection Notes
Select this component when a compact solution for low-voltage motor control is required. It is suitable for applications powered by single-cell lithium-ion or multi-cell battery packs within the specified voltage range. Consider the thermal performance of the exposed pad layout if operating near maximum current limits. Verify that the parallel interface timing meets the microcontroller's capabilities.
Part Context
This part belongs to the A3918 family of low-voltage motor drivers from Allegro MicroSystems. It is designed as a complete solution for driving small motors in space-constrained environments. The series emphasizes integration to reduce external component count. It targets markets requiring reliable motion control in portable or battery-operated devices.
Replacement Considerations
Check for pin-compatible alternatives within the same Allegro product line. Verify functional equivalence regarding voltage range and current capacity before substitution.
