Chapter 214

New charger topology maximizes battery charging speed

Fran Hoffart


The LT1511, a high efficiency 200kHz switching regulator IC in a step-down configuration suitable for charging lithium-ion batteries, is described.


Lithium-ion battery

battery charger



Battery charging in notebook computers and other portable products generally involves compromises. A notebook computer’s AC adapter is usually sized to charge the battery at its maximum rate when the computer is off. In this condition, the computer draws essentially no power, so the full capacity of the adapter can be used for charging the battery. However, when the computer is turned on, charging current is usually reduced to a low rate ...

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