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3. TECHNICAL BRIEF
Trickle Charging
Trickle Charging of the main battery, enabled through SBI control and powered from V
DD,
is provided by
the PM7540 IC, The trickle charger is on-chip programmable current source that supplies current from
V
DD
to pin (VBAT). Trickle charging can be used for lithium-ion and nickelbased batteries, with its
performance specified below (3.2V). The charging current is set to 80mA.
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Parameter Min Typ Max Unit
Trickle Current 60 80 100 mA
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