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TIDA-00111

Stepper Motor System with Medium Torque Drive

Design files

TIDA-00111

Design files

Overview

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.

Features
  • 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

 

Note:

Motor must be ordered through the manufacturer
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Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Test report — TIDA-00111
TIDU149.PDF (1509 KB)

Test results for the reference design, including efficiency graphs, test prerequisites and more

download Bill of materials (BOM) — TIDA-00111
TIDR285.PDF (38 KB)

Complete listing of design components, reference designators, and manufacturers/part numbers

download Schematic — TIDA-00111
TIDC013.ZIP (656 KB)

Detailed schematic diagram for design layout and components

download Schematic — TIDA-00111
TIDR284.PDF (410 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Linear & low-dropout (LDO) regulators

TPS777 — 750-mA, 10-V, low-dropout voltage regulator with enable & RESET with delay

Data sheet: PDF
MSP430 microcontrollers

MSP430F2617 — 16 MHz MCU with 92KB Flash, 8KB SRAM, 12-bit ADC, Dual 12-bit DAC, I2C/SPI/UART, HW multiplier, DMA

Data sheet: PDF | HTML

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Hardware

Evaluation board

DRV8818EVM — DRV8818 Evaluation Module

The DRV8818 evaluation module (EVM) demonstrates the capabilities and performance of the DRV8818 integrated micro-stepping motor driver from Texas Instruments. This EVM comes with an on-board MSP430 microprocessor which has been pre-programmed for standalone operation. The regulated voltage for the (...)

EVM user’s guide: PDF
Supported products & hardware

Supported products & hardware

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Reference design
TIDA-00111 — Stepper Motor System with Medium Torque Drive
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DRV8818EVM — DRV8818 Evaluation Module

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TIDA-00111 — Stepper Motor System with Medium Torque Drive
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Technical documentation

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* Test report TIDA-00111 Test Results Nov 5, 2013

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