- 59 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL DESCRIPTION
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.
Table. 3-5-4. Trickle charging spec
Parameter
Min Typ Max Unit
Trickle current 30 40 60 mA
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.
Fig. 3-5-7. CCCV charging method
To Next Page
Loading...
