Only For Training And Service Purposes - LG GT500 Service Manual

Trickle charging
When the VBAT is below a certain value, 3.2V, a current generator take care of internal trickle charge signal is
active. The charging current is set to 50mA.
Parameter
Trickle current
Normal charging
When the VBAT voltage is within limits or the internal regulators are turned on, the current source for trickle
charging is turned off and all parts of the charging block are active. The charging method is 'CCCV'.
(Constant Current Constant Voltage)
This charging method is used for Lithium chemistry battery packs. The CCCV method regulates the charge
current and the VBAT voltage. This charging method prevents the battery voltage to go above the charge
set in the CCCV algorithm. (Fig.3-5-8) shows the charging voltage and charging current change.
Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Min
30
Table. 3-5-4. Trickle charging spec
Fig. 3-5-7. CCCV charging method
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3. TECHNICAL DESCRIPTION
Typ Max
40 60
Unit
mA
LGE Internal Use Only