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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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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. (Fig.3-5-6) shows the schematic of
charging part.
When VBAT is below a certain value, 3.2V, a current generator take care of initial charging of the
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 (Fig.3-5-7)
BATT_GND
route as a differential pair
2012
1/4W
1%
D1
D2
D3
D4
G1
G2
S1
S2
SIA911DJ
Q600
0.1
R611
VBAT_D
H1
VBUS
J1
CHSENSE-
DCIO
F3
G11
FGSENSE-
CHREG
E2
E1
F2
VBAT
0
R610
DCIN_A
47K
R613
DCIN
VBUS
Fig. 3-5-6. Charging Part
Fig. 3-5-7 Battery Block Indication
4.17 ~3.67 (V)
100~40 (%)
3.67 ~3.52 (V)
40~12 (%)
3.52 ~3.4 (V)
12~3 (%)
3.4 ~3.2 (V)
3~0(%)
Z3X-BOX.COM
Содержание KT520
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