TIDA-01574

Power Stage Reference Design for Power Stealing Thermostat

TIDA-01574

Design files

Overview

TIDA-01574 is a reference design for high-efficiency power stealing for smart thermostats and other building automation equipment. In general, power stealing enables to extend battery life of Wi-Fi enabled smart thermostats by drawing power from 24-V AC when the HVAC load is off. This power-stealing design provides smooth and highly-efficient way to steal power from 24-V AC without interrupting the operation of HVAC load. In this design, TPS2662 - 60V eFuse provides accurate current-limiting and over-voltage protection to enable highly-efficient power stealing.

Features
  • Highly-efficient 24-V AC power stealing
  • Cost-efficient integrated design
  • Enhanced battery life
  • Fast and accurate current limit
  • Accurate over-voltage protection
Industrial

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.

TIDUDV2.PDF (1364 K)

Reference design overview and verified performance test data

TIDRVD0.PDF (258 K)

Detailed schematic diagram for design layout and components

TIDRVD1.PDF (58 K)

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

TIDRVD2.PDF (136 K)

Detailed overview of design layout for component placement

TIDRVD4.ZIP (942 K)

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

TIDCEF8.ZIP (433 K)

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

TIDRVD3.PDF (600 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

eFuses & hot swap controllers

TPS26624.5-V to 60-V, 478mΩ, 0.025-0.88A eFuse with integrated input and output reverse polarity protection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Boost converters (integrated switch)

TPS61021A3-A Boost Converter with 0.5-V Ultra Low Input Voltage

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck converters (integrated switch)

TPS54040A3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode

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

TPS22910A5.5-V, 2-A, 60-mΩ load switch with active low enable

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

TPS22912C5.5-V, 2-A, 60-mΩ load switch with active high enable

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

Technical documentation

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Type Title Date
* Design guide Power Stage Reference Design for Power Stealing Thermostat Jan. 05, 2018

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-01358 24-V AC Power Stage With Wide Vin Converter and Battery Backup Reference Design for Smart Thermostat

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