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Implementation of microprocessor-controlled, wide-input-voltage, SMBus smart battery charger

Posted: 27 Jul 2011     Print Version  Bookmark and Share

Keywords:lithium-ion  microprocessor  battery charging 

With the increasing popularity of lithium-ion chemistries in all types of electronics designs, innovative solutions for charging these batteries are becoming essential. For the utmost in system flexibility, a microprocessor can be used to control all aspects of battery charging, including unique charging algorithms to increase the charging rate and lifetime of the cells. This method also allows for higher-voltage battery-pack implementations.

This article describes using a microprocessor to control the power-stage board of a wide-input-voltage DC/DC controller. This solution can support an input voltage of up to 55 V; a battery-charging voltage ranging from 5 to 51 V; and up to 10 A of output current in most cases. Both the hardware and software discussed in this article have been developed and tested by Texas Instruments applications staff to allow customers to quickly prototype the solution.

View the PDF document for more information.





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