Dual Power Path Multiplexer Reference Design


Design files


Many systems require a backup battery to provide power in the event of a power outage.  Switching between the main power and the backup battery power without incurring significant efficiency degradation or cost is a tricky challenge.   This design provides a high accuracy, low current solution for systems using a 12 V rail with a backup battery at a lower cost than existing devices.

  • Low current consumption in battery backup mode: 28 uA
  • High voltage threshold accuracy: 1.75% including resistors
  • Independent voltage programming on primary and secondary rails

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.

TIDUAZ2.PDF (1283 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


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


Includes TI products in the design and potential alternatives.

Supervisor & reset ICs

TPS3701High-voltage (36-V) window voltage detector with internal reference for OV & UV monitoring

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

Technical documentation

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Type Title Date
* Design guide Dual Power Path Multiplexer Design Guide Oct. 27, 2015

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