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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
3.5.3 Charging Part
The charging block in AB2010 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.2-5-6) shows the
schematic of charging part.
Fig. 3-5-6. 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.2-5-7)
Fig. 3-5-7 Battery Block Indication
`
4.2000~3.864
100~63(%)
4.2000~3.864
62~39(%)
4.2000~3.864
38~6(%)
4.2000~3.864
6~0(%)
Charging
Route as a differential pair
Discharging
USB charging path
VDD_REF
P7
VDD_SPKR
VBAT_D
E2
VBUS
VDD_AUDIO
P13
VDD_AUXO
P3
P6
VDD_BEAR
G1
TRICKLE
F2
G2
F1
J2
DCIO_INT
FGSENSEN
J13
H3
CHREG
CHSENSEN
H2
CHSENSEP
H1
C4
DAC_CLK
C5
DAC_DAT
DAC_STR
B5
DCIO
VBAT
C343
KDS221E RTK
D303
3
A1_C2
2
A2
1
C1
47p
R311
VBAT_D
1u
D1
D2
D3
D4
G1
G2
S1
S2
SIA911DJ
Q302
VBAT_D
C344
C334
22p
R319
C340
VBAT
R315
0.1
2012
1/4W
1%
VBUS
0
R313
33u
C335
VDDC_2V65
USFB13L
D302
VDD_REF
R314
0
BDATA
CHS-
VBUS
CHS+
CHREG
DCIO_INT
OTP
RF_CTRL_CLK
RF_CTRL_DATA
RF_CTRL_STR_1
DCIO_INT
TRICKLE
CHREG
CHS-
CHS+
VBUS
VBAT_D
E2
VBUS
TRICKLE
F2
G2
F1
J2
DCIO_INT
FGSENSEN
J13
H3
CHREG
CHSENSEN
H2
CHSENSEP
H1
C5
DAC_DAT
DCIO
VBAT
47p
C325
R311
1u
VBAT_D
USFB13L
D302
R314
0
VBUS
OTP
FGS-
RF_CTRL_DATA
DCIO_INT
TRICKLE
CHREG
CHS-
CHS+
VBUS
U301
AB3100