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Power Stage Reference Design for Power Stealing Thermostat
TIDA-01574
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Key Document

Description

This TI Design provides a reference design for low cost high efficiency power stealing for low cost 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 TI 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
  • Low Cost Integrated Solution
  • Enhanced Battery Life
  • Fast and Accurate Current Limit
  • Accurate Over Voltage Protection

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Schematic/Block Diagram

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Design Files

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS22910A  5.5-V, 2-A, 60-mΩ load switch with active low enable  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS22912C  5.5-V, 2-A, 60-mΩ load switch with active high enable  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
TPS54040A  3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS61021A  3-A Boost Converter with 0.5-V Ultra Low Input Voltage  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS22910A Download -
TPS22912C Download -
TPS2662 Download -
TPS54040A Download
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TPS61021A Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 1364 05 Jan 2018
Design files (6)
Title Type Size (KB) Date
ZIP 433 05 Jan 2018
ZIP 942 05 Jan 2018
PDF 600 05 Jan 2018
PDF 136 05 Jan 2018
PDF 58 05 Jan 2018
PDF 258 05 Jan 2018
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
24-V AC Power Stage With Wide Vin Converter and Battery Backup Reference Design for Smart Thermostat  TIDA-01358  Reference design 

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