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Adjusting charging voltage of lithium batteries

Posted: 19 Aug 2011 ?? ?Print Version ?Bookmark and Share

Keywords:Lithium batteries? charging? termination voltage?

Lithium batteries are widely used, and they have settled into a fairly standard productone with a maximum charge voltage of 4.2V 1%. As a result, most of the ICs currently available for charging lithium batteries are designed to charge at 4.2V, with a tight tolerance of 1%.

In the past few years, however, a different lithium-battery technology has reached the market, offering higher power density, accepting much higher charge and discharge rates than standard batteries, and featuring various charge-termination voltages. This design idea modifies the application circuit of a standard, high-end IC charger to provide a different termination voltage and higher current rate, while maintaining all the charger's original features.

View the PDF document for more information.

Originally published by Maxim Integrated Products at www.maxim-ic.com as "Charging Lithium Batteries with a Nonstandard Termination Voltage".





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