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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 as "Charging Lithium Batteries with a Nonstandard Termination Voltage".

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