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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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.
mA
100
80
60
Trickle Current
Unit
Max
Typ
Min
Parameter
PM7540
Input Power
Managemen
t
Содержание Vodafone GM750
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