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The rechargeable Li-Ion/Li-Poly batteries are widely
used in today’s portable Consumer Electronics (CE).
Commonly seen Li-Poly batteries are Li-Ion Polymer
batteries that use a solid polymer separator and share
the same charge algorithm with Li-Ion batteries. Thus,
Li-Ion batteries will represent both Li-Ion and Li-Poly
batteries in this application note. Because of the
growing features and the increasing size of the display
in a portable electronic product, the battery usage is
also modifying. The daily battery charging frequency
increases, and it becomes important to operate a
device while charging its battery.
The traditional method to design a battery-powered
system is to connect the system load directly on the
battery. The system load continuously discharges the
Li-Ion battery and costs a battery’s life cycle. In order to
maximize the life cycle of Li-Ion batteries, it is
recommended to terminate the charge properly and
power the system from the input power supply, when it
AN1260
Li-Ion/Li-Poly Battery Charge and System Load Sharing
Management Design Guide With MCP73871
is available. To prevent overcharging Li-Ion batteries,
Author: Brian Chu
an elapse timer is usually required as a secondary
Microchip Technology Inc.
method to turn off the battery charge activities, before
a proper termination condition is met. Minimum current

关键词： MCP73871   锂电池充电   电池充电