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Switched-Cap Fast Charge Reference Design for USB Power Delivery Programmable Power Supply
TIDA-01582
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Description & Features

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Key Document

Description

The goal of this reference design is to show the total system performance when using the switched-cap fast charge topology in a smart phone application. The system includes using a smart wall adapter that supports USB Power Delivery (PD) Programmable Power Supply (PPS) specifications to reduce losses over the charging cable as well as reduce losses and the temperature rise in the smart phone. The bq25970 is the first switched-capacitor charger from TI that is capable of delivering up to 8A of charge current to a battery.

Features
  • High efficiency charging 96.6% at 6A
  • Full system example for USB PD PPS voltage and current control
  • Software flow chart for phone and wall adapter
  • bq25890 for precharge, taper charge and termination
  • bq25970 for 6A charging with 3A cable current
  • TUSB422 USB PD controller for communication with smart wall adapter

See the Important Notice and Disclaimer covering reference designs and other TI resources.

What's Included

Not Included
  • Smart wall adapter not included
  • EV2400 USB to I2C adapter not included


  



Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ25890  1-cell, 5-A, battery charger Maxcharge™ tech for high input voltageand adjustable boost with D+/D-  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules
BQ25970  1-cell, 8-A, switched cap battery charger with integrated protection and external OVP support  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules
TS3USB221  High-Speed USB 2.0 (480 Mbps) 1:2 Multiplexer/Demultiplexer Switch With Single Enable  USB ICs  Sample & Buy View Design Kits & Evaluation Modules
TUSB422  USB PD TCPCi Port Controller  USB ICs  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ25890 Download Download
BQ25970 Download -
TS3USB221 Download Download
Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1556 25 Sep 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1226 02 Jan 2018
ZIP 3059 02 Jan 2018
PDF 3414 02 Jan 2018
PDF 504 02 Jan 2018
PDF 48 02 Jan 2018
PDF 376 02 Jan 2018
Related Tools & Software

Software development (1)

Name Part Number Software Type
Battery Management Studio (bqStudio) Software  BQSTUDIO  Application software & framework 


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