Protected DC-bus input power and control power supply reference design for low-voltage servo drives
TIDA-010070
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Key Document

Description

This reference design uses an ORing controller, the LM5050-1 to provide protection against reverse polarity and reverse current. In conjunction, the LM5069 hot swap controller is used for overcurrent, over voltage, under voltage protection, and inrush current limitation. The design also features power rails for the control electronics including the gate drive, encoder and MCU circuitry.

Features
  • Protect the DC bus voltage against over voltage, reverse polarity, overcurrent and inrush current.
  • Prevent reverse current flow back into the common DC bus supply during motor braking.
  • Ability to withstand up to 100-V transients on the DC link (48 V nominal).
  • Option to power the MCU using the USB for configuration in absence of DC bus input.
  • Protect the encoder supplies (both from the DC bus and external back up battery) against short-circuit fault.

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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 (11)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD19536KTT  100V, N ch NexFET MOSFET™, single D2PAK, 2.4mOhm  MOSFETs  Sample & Buy Not Available
CSD25501F3  -20V, P ch NexFET MOSFET™, single LGA 0.6x0.7, 76mOhm  MOSFETs  Sample & Buy Not Available
LM5050-1  5-V to 75-V, 400-uA IQ ideal diode controller  Power switches  Sample & Buy View Design Kits & Evaluation Modules
LM5069  9-V to 80-V hot swap controller with power limiting  Power switches  Sample & Buy View Design Kits & Evaluation Modules
LM5164  6-V to 100-V input, 1-A synchronous buck DC-DC converter with ultra-low IQ  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
LP38691  500-mA, 10-V, low-dropout voltage regulator  Power management  Sample & Buy Not Available
TPS2121  2.7-V to 22-V, 56-mΩ, 4.5-A, power mux with seamless switchover  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS22919  5.5-V, 1.5-A, 90-mΩ load switch with adj. output discharge  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS2662  4.5-V to 60-V, 478mΩ, 0.025-0.88A eFuse with integrated input and output reverse polarity p  Power switches  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
TPS560430  SIMPLE SWITCHER® 36-V, 600-mA Buck Regulator With High-Efficiency Sleep Mode  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD19536KTT Download -
LM5050-1 Download Download
LM5069 Download Download
LM5164 Download Download
LP38691 Download Download
Download Download
TPS2121 Download Download
TPS22919 Download Download
TPS2662 Download Download
TPS560430 Download -

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 3452 04 Dec 2019
Design files (6)
Title Type Size (KB) Date
ZIP 321 04 Dec 2019
ZIP 2953 04 Dec 2019
PDF 1163 04 Dec 2019
PDF 209 04 Dec 2019
PDF 102 04 Dec 2019
PDF 263 04 Dec 2019

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