Charging Circuit - LG GD510 Service Manual

GD510 Operational Description
3.12.2. 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
RPWRON_EN
R410
130K
RPWRON
R411
130K
Copyright © 2009 LG Electronics. Inc. All right reserved.
LG Electronics
Only for training and service purposes
MIC
VMIC_P
C225 0.022uF L202
MAIN_MIC_N
C227
39pF
C226 0.022uF L201
MAIN_MIC_P
C229 C228
39pF 39pF
VMIC_N
Figure 18 Microphone circuit
Single Charging IC for uUSB
V_BUS
1
2
3
4
5
C401 C409
R405 R406
1uF 1uF
1.2Kohms 3.3Kohms
1%
1%
(450mA) (60mA)
Figure 19 Charging circuit
L203
0.1uH
MIC201
0.1uH
1
P
2
G1
3
G2
4
O
SPU0410HR5H-PB
0.1uH
C231
VA201
10u
EVLC14S02050
VIO_2V62 VIO_2V62
R409 R408
DNI 100Kohms
11
PGND
10
IN BAT
9
U402
ISET _PG
BQ25040
8
VSS1 CHG
7
LDO VSS2
6
IFULL EN_SET
- 41 -
41/113
3. Technical brief
Revision A
.
VIO_2V62
VBAT
R407
100Kohms
_PPR
CHG_EOC
_CHG_EN
C411
1uF
LGE Internal Use Only
LGE Property