TIDA-01556

Maximum Power Point Tracking Algorithm for Low Power Solar Battery Charging Reference Design

TIDA-01556

Design files

Overview

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.

Features
  • 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

Design files & products

Design files

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

TIDUDJ2.PDF (679 K)

Reference design overview and verified performance test data

TIDRVD5.PDF (74 K)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Battery charger ICs

BQ25895I2C 1cell 5A buck battery charger with high input voltage and 3.1-A boost with HVDCP enabled

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430FR413316 MHz MCU with 16KB FRAM, 2KB SRAM, 10-bit ADC, LCD, UART/SPI/I2C, IR logic, timer

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

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Software

Support software

bq25895 Solar Battery Charging MPPT – TIDCEF9.ZIP (167 K)

Technical documentation

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Type Title Date
* Design guide Maximum Power Point Tracking Algorithm for Solar Battery Charging Ref Design Aug. 28, 2017

Related design resources

Hardware development

EVALUATION BOARD
BQ25895EVM-664 BQ25895 Complete Charger Evaluation Module
DEVELOPMENT KIT
MSP-EXP430FR4133 MSP430FR4133 LaunchPad™ development kit ;

Software development

IDE, CONFIGURATION, COMPILER OR DEBUGGER
CCSTUDIO Code Composer Studio™ integrated development environment (IDE)

Reference designs

REFERENCE DESIGN
TIDA-03029 Optimizing Efficiency by Handshaking Adjustable Adapters and Battery Chargers Reference Design

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