Maximum Power Point Tracking Algorithm for Low Power Solar Battery Charging Reference Design
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

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

Key Document


This reference design is a software implementation of a basic maximum power point tracking algorithm for a single-cell battery charging system using a solar panel input. This design removes the requirement for extra circuitry and complex firmware by using integrated features of the charger to achieve maximized charging current all through a simple I²C-based control scheme.

  • Integrated 7-bit ADC to monitor input voltage, battery voltage, and charge current
  • Adjustable input voltage limit with 100-mV resolution
  • High charge efficiency with 93% at 2A and 91% at 3A
  • Wide input voltage operating range from 3.9V to 14V
  • Integrated reverse blocking FET for solar input protection
  • Input high-impedance mode for open circuit voltage measurement

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


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

TI Devices (2)

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
BQ25895  I2C 1cell 5A buck battery charger with high input voltage and 3.1-A boost with HVDCP enabled  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR4133  16 MHz MCU with 16KB FRAM, 2KB SRAM, 10-bit ADC, LCD, UART/SPI/I2C, IR logic, timer  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ25895 Download Download
MSP430FR4133 Download Download
Download Download
Download -
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 documentation

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

Data sheet (2)
Title Type Size (KB) Date
PDF 2235 09 Dec 2019
PDF 1847 04 May 2018
User guide (3)
Title Type Size (KB) Date
PDF 679 28 Aug 2017
PDF 2265 17 Jan 2017
PDF 2872 24 Nov 2015
Design files (1)
Title Type Size (KB) Date
PDF 74 08 Jan 2018
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
Optimizing Efficiency by Handshaking Adjustable Adapters and Battery Chargers Reference Design  TIDA-03029  Reference design 

Hardware development (2)

Name Part Number Tool Type
MSP430FR4133 LaunchPad™ development kit ;  MSP-EXP430FR4133  Development kit 
BQ25895 Complete Charger Evaluation Module  BQ25895EVM-664  Evaluation board 

Software development (2)

Name Part Number Software Type
Code Composer Studio™ integrated development environment (IDE)  CCSTUDIO  IDE, configuration, compiler or debugger 

Support & training

TI E2E™ forums with technical support from TI engineers

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

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

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles