Safety power supply for motor drives reference design


Design files


This reference design implements a safe-power supply for powering up microcontrollers in an architecture featuring two MCUs. The design has several protection features including overvoltage protection and short circuit protection to prevent the MCUs from getting damaged. The DC/DCs, LMR36515 and LMR36015 convert the 5-V and 12-V rail into 3.3 V, which is monitored by the TPS3703 and TPS3702 voltage monitors respectively.

  • Overvoltage, overcurrent, and short circuit protection of the 3.3-V rail for powering the MCU
  • Protection of the power supply input from an overvoltage of up to 60 V
  • Small form factor for space-critical applications
  • Synchronous buck DC/DC converter with integrated switch optimized for > 90% efficiency and compact design
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDUEP8.PDF (4118 K)

Reference design overview and verified performance test data

TIDM482.PDF (315 K)

Detailed schematic diagram for design layout and components

TIDM483.PDF (134 K)

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

TIDM484.PDF (213 K)

Detailed overview of design layout for component placement

TIDM486.ZIP (3493 K)

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

TIDCFS5.ZIP (1212 K)

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

TIDM485.PDF (669 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

eFuses & hot swap controllers

TPS24005.5-V over voltage protection controller with 100-V input transient protection

Data sheet: PDF | HTML
eFuses & hot swap controllers

TPS26604.2-V to 60-V, 150mΩ, 0.1-2.23A eFuse with integrated input reverse polarity protection

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

LMR360154.2-V to 60-V, 1.5-A ultra-small synchronous step-down converter

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

LMR36520SIMPLE SWITCHER® 4.2-V to 65-V, 2-A synchronous step-down converter with 26-uA IQ

Data sheet: PDF
General-purpose op amps

TLV6002Dual, 5.5-V, 1-MHz, RRIO operational amplifier

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7A16100-mA, 60-V, ultra-low-IQ, low-dropout (LDO) voltage regulator with power good and enable

Data sheet: PDF | HTML
Supervisor & reset ICs

TPS3702High-accuracy window voltage detector for overvoltage and undervoltage monitoring

Data sheet: PDF | HTML
Supervisor & reset ICs

TPS3703-Q1Automotive high-accuracy window supervisor with reset time delay

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Safety Power Supply for Motor Drives Reference Design Feb. 25, 2020

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