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

(ACTIVE) TIDA-01358

Description & Features

Technical Documents

Support & Training

Order Now


View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Key Document

Description

The TIDA-01358 reference design provides a low BOM cost, high efficiency power stage solution for smart thermostats and other gateway building automation end equipment. This power stage takes a 24Vac input and produces a 5V and 3.3V output rail which can power additional point-of-load converters if added. The design provides LiPo battery charging and seamless switching to battery power during a 24Vac brownout. The power-path capability provides battery power assistance allowing system load transient to exceed the current limit of the 24Vac to DC system, allowing a lower cost Wide Vin buck to be utilized.

Features
  • Battery backup
  • Independent battery charging and load path
  • Dynamic power path/battery power assist
  • High efficiency over entire load current range
  • USB over-curent compliant

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Design Guide

Get results faster with test and simulation data that's been verified.

Download Design Guide

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files


Bill of Materials (BOM)

Find the complete list of components in this reference design.

Download BOM

TI Devices (6)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ24072  USB-Friendly Li-Ion Battery Charger and Power-Path Management IC, Vout 200mV above Vbat | Linear  Battery management  Sample & Buy View Design Kits & Evaluation Modules
LM2903  Dual Differential Comparator  Amplifiers  Sample & Buy Not Available
LM5166  3V-65V Input, 500mA Synchronous Buck Converter With Ultra-Low Iq  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TLV62080  1.2A High Efficient Step Down Converter in 2x2mm SON Package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPD2E2U06  Dual-Channel High-Speed ESD Protection  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules
TPS27081A  1.2V - 8V, 3A PFET High Side Load Switch w/ Level Shift & Adj Slew Rate Control  Power switches  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ24072 Download Download
LM2903 Download Download
Download Download
Download Download
Download -
Download Download
LM5166 Download Download
TLV62080 Download
TPD2E2U06 Download
TPS27081A Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 4732 06 Feb 2017 8
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 502 20 Dec 2016 3
ZIP 895 20 Dec 2016 4
PDF 1283 20 Dec 2016 4
PDF 311 20 Dec 2016 4
PDF 81 20 Dec 2016 3
PDF 595 20 Dec 2016 4

Support & Training

Try our support forums.
Search expert answers for this part Ask a new question

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

Blogs