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TIDA-01556

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

Design files

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
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

download Design guide — TIDA-01556
TIDUDJ2.PDF (679 K)

Reference design overview and verified performance test data

download Schematic — TIDA-01556
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

BQ25895 — I2C 1cell 5A buck battery charger with high input voltage and 3.1-A boost with HVDCP enabled

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR4133 — 16 MHz MCU with 16KB FRAM, 2KB SRAM, 10-bit ADC, LCD, UART/SPI/I2C, IR logic, timer

Data sheet: PDF | HTML

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Software

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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