Only For Training And Service Purposes - LG CT815 Service Manual

3. TECHNICAL BRIEF
Trickle Charging
Trickle Charging of the main battery, enabled through SBI control and powered from VDD, is provided
by the PM7540 IC, The trickle charger is on-chip programmable current source that supplies current
from VDD 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.
Parameter
Trickle Current
LGE Internal Use Only
Min Typ
60 80
Input Power
Managemen
- 40 -
Max Unit
100 mA
PM7540
t
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Only for training and service purposes