Stepper Motor System with Medium Torque Drive TIDA-00111 (ACTIVE)

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This bipolar stepper motor system implements an MSP430, a DRV8818, and a NEMA 23 motor.  It's suitable for applications requiring up to 140 oz-in of torque, and up to 800 RPM.  Motor voltage support is 8V to 35V, and max current is 2.5A.  A multitude of configuration options allow fine tuning of the current waveform, including the regulated current level, the microstepping applied, H-bridge FET states during current decay, the time interval of current decay, and current deglitch time.  The motor drive stage has integrated protection from short-circuit, shoot-through, under-voltage, and over-temperature.

  • Highly configurable current waveform allows maximum tunability
  • Integrated power FETs support 8V to 35V and 2.5A
  • Motor speed is easily controlled by the STEP frequency
  • Hardware state machine modulates current with up to 1/8 microstepping for a smooth motion profile
  • Integrated protection for short-circuit, shoot-through, under-voltage, and over-temperature



Motor must be ordered through the manufacturer

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Schematic/Block Diagram

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DRV8818EVM :
DRV8818 Evaluation Module


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TI Devices (3)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DRV8818  2.5A Bipolar Stepper Motor Driver with On-Chip 1/8 Microstepping Indexer (Step/Dir Ctrl)  Motor drivers  Sample & Buy View Design Kits & Evaluation Modules
MSP430F2617  16-Bit Ultra-Low-Power MCU, 92KB Flash, 8KB RAM, 12-Bit ADC, Dual DAC, 2 USCI, HW Mult, DMA  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPS777  750-mA, Low Dropout Linear Regulators with Supervisor  Power management  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DRV8818 Download -
MSP430F2617 Download Download
Download Download
Download -
TPS777 Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1450 05 Nov 2013
Design files (2)
Title Type Size (KB) Date
PDF 38 05 Nov 2013
PDF 409 05 Nov 2013
Related Tools & Software

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
DRV8818 Evaluation Module  DRV8818EVM  Evaluation Modules & Boards 

Software (1)

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