12-V, 15-W Power limit, single driver-based stepper, brushed DC and actuator drive reference design


Design files


This reference design demonstrates a multi-load drive using one driver chip in multiple configurations enabling reduced inventory. The multiple loads include one bipolar stepper motor, one brushed DC motor, and three actuator or solenoid loads driven from a 12-V DC supply. The design shows less than two percent accuracy error in input current limit, that helps to achieve a precise power limit for helping easy qualification as a low-power circuit, defined by IEC 60335-1. This reference design incorporates enhanced protections like open load detect, noise tolerant short circuit, overcurrent, overvoltage, undervoltage, overtemperature, surge and ESD protection all which helps to achieve a reliable and robust system design.

  • Operates from 4.5V to 16V, supporting multiple loads including bi-polar stepper motor (0.5-ARMS), brushed DC motor (1.2-ARMS), solenoids and actuators (0.2-ARMS)
  • Detailed fault diagnosis and multi-slave operation through I2C using a single MCU
  • Motor or load control through I2C line reduces the number of MCU pins required
  • Increased safety and reliability with precise power limit (<15 W) using eFuse
  • Open load detect, over current, short circuit, over temperature, surge and ESD protection

Design files & products

Design files

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


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components

TIDRX00A.PDF (286 K)

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

TIDRX01A.PDF (177 K)

Detailed overview of design layout for component placement

TIDRX03A.ZIP (2928 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRX02A.PDF (1005 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

ESD & surge protection ICs

TPD1E10B0612-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet document-pdfAcrobat PDF open-in-new HTML
ESD & surge protection ICs

TVS140014V flat-clamp surge protection device

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430FR573924 MHz MCU with 16KB FRAM, 1KB SRAM, 10-bit ADC , comparator, UART/SPI/I2C, timer

Data sheet document-pdfAcrobat PDF open-in-new HTML
eFuses & hot swap controllers

TPS25921L4.5-V to 18-V, 90mΩ, 0.4-1.6A eFuse with latch off fault response

Data sheet document-pdfAcrobat PDF open-in-new HTML
eFuses & hot swap controllers

TPS25962.7-V to 19-V, 85mΩ, 0.13-2A eFuse with selectable over voltage protection clamp in leaded package

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development



TIDA-010004 Firmware – TIDCEV0.ZIP (4514 K)

Technical documentation

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Type Title Date
* Design guide 12-V, 15-W Power Limit, Single Driver-Based Stepper, Brushed DC and Actuator (Rev. A) May 10, 2019
More literature TIDA-010004 Firmware Sep. 06, 2018

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