LG GD510 - Charging Circuit

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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
GD510 Operational Description Revision A
LG Electronics 41/113 LGE Property
3.12.2. Microphone circuit
Figure 18 Microphone circuit
3.13. Charging circuit
BQ25045 accepts one power input from a USB (Universal Serial Bus) port or desktop cradle.
The BQ25045 features maximum voltages for the cradle and the USB inputs respectively. Due to the
30V rating for the cradle input, low-cost, large output tolerance adapters can be used safely
.
Figure 19 Charging circuit
0
0
42
C
C227
39pF
0.022uFC225
0.022uFC226 L201 0.1uH
L202 0.1uH
EVLC14S02050
VA201
MIC201
SPU0410HR5H-PB
4
3
2
1
P
G1
G2
O
C228
39pF
39pF
C229
0.1uH
L203
10u
C231
VMIC_P
VMIC_N
MAIN_MIC_P
MAIN_MIC_N
MIC
1uF
C401
1uF
C409
R405
1.2Kohms
130K
R411
3.3Kohms
R406
C411
1uF
100Kohms
R407
100Kohms
R408R409
DNI
BQ25040
U402
5 6
74
83
92
101
11
PGND
IN BAT
ISET _PG
VSS1 CHG
LDO VSS2
EN_SETIFULL
130K
R410
V_BUS
VIO_2V62
VBAT
VIO_2V62
VIO_2V62
_PPR
_CHG_EN
CHG_EOC
RPWRON_EN
RPWRON
(60mA)
1%
1%
(450mA)
Single Charging IC for uUSB