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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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 nickel-based batteries, with its performance
specified below (3.2V). The charging current is set to 80mA.
Parameter Min Typ Max Unit
Trickle Current 60 80 100 mA
PM7540
Input Power
Management
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