Safety power supply for motor drives reference design
TIDA-010052
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Key Document

Description

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.

Features
  • 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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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMR36015  4.2-V to 60-V, 1.5-A ultra-small synchronous step-down converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
LMR36520  SIMPLE SWITCHER® 4.2-V to 65-V, 2-A synchronous step-down converter with 26-uA IQ  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TLV6002  2-Channel, 1-MHz, low power op amp for cost-sensitive systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS2400  5.5-V over voltage protection controller with 100-V input transient protection  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS2660  4.2-V-55-V, 150mĪ©, 0.1-2.23A eFuse with integrated input reverse polarity protection  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS3702  High-accuracy window voltage detector for overvoltage andĀ undervoltage monitoring  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS3703-Q1  Automotive high-accuracy window supervisor with reset time delay  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A16  100-mA, 60-V, ultra-low-IQ, low-dropout voltage regulator with power good & enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LMR36015 Download Download
LMR36520 Download Download
TLV6002 Download
Download
TPS2400 Download Download
TPS2660 Download Download
Download Download
TPS3702 Download Download
TPS7A16 Download Download
Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 4055 25 Feb 2020
Design files (6)
Title Type Size (KB) Date
ZIP 1212 25 Feb 2020
ZIP 3493 25 Feb 2020
PDF 669 25 Feb 2020
PDF 213 25 Feb 2020
PDF 134 25 Feb 2020
PDF 315 25 Feb 2020

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