TIDA-00514

Load Switches for Power MUXing & Reverse Current Blocking Reference Design

TIDA-00514

Design files

Overview

In systems that can be powered from multiple power sources, achieving a seamless transition when switching between sources can be challenging, especially when it is also neccesary to block reverse current flow. This reference design demonstrates how two load switches can be used to MUX power between two supplies and block reverse current.

Features
  • TPS22959 - 2:1 power multiplexer (MUX):
    • 5.5 V, 15 A, 4.4 mΩ (typical at VBIAS = 5 V)
    • Optimized RC circuit ensures make-before-break logic
    • Control via single GPIO to select supply
  • TPS22959 - reverse current blocking:
    • 5.5 V, 15 A, 8.8 mΩ (typical at VBIAS = 5 V)
    • Back-to-back switches block reverse current when disabled
    • Adjustable rise time
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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.

TIDUA64.PDF (1736 K)

Reference design overview and verified performance test data

TIDRFP3.PDF (160 K)

Detailed schematic diagram for design layout and components

TIDRFP4.PDF (74 K)

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

TIDRFP5.PDF (197 K)

Detailed overview of design layout for component placement

TIDRFP7.ZIP (566 K)

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

TIDCAL1.ZIP (453 K)

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

TIDRFP6.PDF (987 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Load switches

TPS229595.5-V, 15-A, 4.4-mΩ load switch with output discharge

Data sheet: PDF | HTML
MOSFETs

CSD13381F412-V, N channel NexFET™ power MOSFET, single LGA 1 mm x 0.6mm, 180 mOhm, gate ESD protection

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Load Switches for Power MUXing and Reverse Current Blocking Design Guide Jun. 29, 2015

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