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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
3.5.3 Charging Part
The charging block in AB3000 processes the charging operation by using VBAT voltage. It
is enabled or disabled by the assertion/negation of the external signal DCIO. Part of the
charging block are activated and deactivated depending on the level of VBAT. (Figure 3-5-
6) shows the schematic of charging part.
Figure 3-5-6. Charging Part
When VBAT is below a certain value, 3.2V, a current generator take care of initial charging
of the CHSENSE+ node and internal trickle charge signal is active. This part of the charging
block is powered on and active when DCIO is asserted. The DCIO signal is asserted when
its voltage is above the voltage at VBAT. As soon as generator is turned off and all parts of
the charging block are functional and active.
Battery block indication as shown in (Figure 3-5-7)
Figure 3-5-7 Battery Block Indication
4.17 ~3.74 (V) 3.73 ~3.55 (V) 3.54 ~3.44 (V) 3.43 ~3.2 (V)
100~41 (%) 40~13 (%) 12~4 (%) 3~0(%)
03-
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