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TMC249A-LA

ADITMC249A-LA

Analog Devices Inc./Maxim Integrated
Bipolar Motor Driver HVCMOS SPI 32-QFN (7x7)
Active756 in stock
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Overview

The TMC249A-LA is a high-performance bipolar stepper motor controller designed to drive external MOSFETs for currents up to 7A. Operating at 3V to 5.5V logic and supporting motor voltages up to 34V, it utilizes SPI for configuration and provides sophisticated features like stall detection and microstepping up to 1/64 resolution.

Why Choose This Part

This controller enables high-current motor drive by using external power stages, decoupling the control logic from thermal constraints of integrated power FETs. It features stallGuard for sensorless load monitoring and mixed decay for superior torque ripple suppression at high speeds.

Applications

Industrial Automation
High-torque positioning tasks in textile machinery and sewing machines requiring precise movement.
Office Equipment
Driving paper feed and carriage mechanisms in printers and scanners where smooth, quiet operation is essential.
Medical Robotics
Used in lab automation and surgical robotics where sensorless stall detection (stallGuard) adds a layer of safety and feedback.

Key Specifications

Function Controller - Commutation, Direction Management
Interface SPI
Technology HVCMOS
Applications General Purpose
Mounting Type Surface Mount
Package / Case 32-VQFN Exposed Pad
Step Resolution 1 ~ 1/64
Voltage - Supply 3.3V ~ 5.5V
Motor Type - Stepper Bipolar
Output Configuration Pre-Driver - Half Bridge (4)
Operating Temperature -25degC ~ 125degC (TA)
Supplier Device Package 32-QFN (7x7)

Getting Started

Designers should interface the TMC249A-LA via its SPI port to configure current scaling and microstepping parameters. It is recommended to use the TMC249-EVAL evaluation board to tune the slope control and stallGuard thresholds before finalizing the external MOSFET selection on a custom PCB.

TMC249A Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
TMC249A-LA (this part) VQFN-32 756
TMC249A-SA SOIC-28 2,818

Also Consider

DRV8711 TITexas Instruments - An alternative gate driver controller for bipolar steppers that also uses external N-channel MOSFETs and features a flexible SPI interface.
TMC2209-LA Analog Devices - Suitable for lower current applications (up to 2A) where integrated power stages are preferred for space savings.

Categories

Motor & Motion Control > H-Bridge & DC Motor Drivers Industrial & Automation > Motor Control & Drives Industrial & Automation > Robotics Components