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AEK-MOT-SM81M1

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Stepper motor driver evaluation board based on the L99SM81V for automotive applications

Quantity $ per Unit Savings
1 - 2$37.980%
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$37.98
Parameter NameParameter Value
Target ApplicationStepper Motor Control
Core ProductL99SM81V
ECCN USEAR99
ECCN EUNEC
Packing TypeNot Applicable
ROHS Compliance GradeEcopack2
GradeIndustrial
Package NameCARD

The AEK-MOT-SM81M1 evaluation board is designed to drive a bipolar stepper motor in micro-stepping mode, with coil voltage monitoring for stall detection.


This application board features the automotive-grade L99SM81V stepper motor driver with embedded power MOSFETs and a comprehensive set of I/Os for MCU control and feedback signaling using SPI communication through a 12-pin male connector or two 5-pin connectors on the board.


The board is developed as part of the AutoDevKit initiative, and evaluation firmware is available for suitable microcontrollers such as the automotive-grade SPC5 series MCU on the AEK-MCU-C4MLIT1 control board.

Key features
  • Board functionality based on L99SM81V programmable stepper motor driver for automotive applications:
    • with micro-stepping and hold functions
    • BEMF monitoring for stall detection
    • programmable configuration via SPI
    • 5 V internal linear voltage regulator (output available on board connector)
  • Board reverse battery protection with STD95N4F3 MOSFET, which can be substituted with two optionally mounted diodes and a jumper
  • Input operating voltage range from 6 V to 28 V
  • Output current up to 1.35 A
  • Board size: 65 mm length x 81 mm width x 11 mm maximum component height
  • WEEE and RoHS compliant
  • All ST components are qualified Automotive grade
  • Part of the AutoDevKit™ initiative
  • Applications: automotive bipolar stepper motor