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3. TECHNICAL BRIEF
3.12.2 Microphone circuit
3.13 Charging circuit
ISL9221 accepts two power inputs, normally one from a USB (Universal Serial Bus) port and the other
from a desktop cradle.
The ISL9221 features 28V and 7V maximum voltages for the cradle and the USB inputs respectively.
Due to the 28V rating for the cradle input, low-cost, large output tolerance adapters can be used
safely.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
G3
4
6
G4
OUT
1
5
PWR
MIC100
SPM0204LE5-QB
2
G1
G2
3
MAIN_MIC_P
VMIC_P
MAIN_MIC_N
MAIN_MIC_N
(1%)
(1%)
(1%)
2V62_VIO
R219
100K
R222
100K
VCHG
6
IMIN
IUSB
7
IVDC
9
13
PGND
10
USB_BYP
VDC
1
VDC_BYP
12
2
VUSB
_CHG
4
_EN
5
3
_PPR
ISL9221
U204
BAT
11
8
GND
R224
16K
2V62_VIO
R225
18K
10K
R223
1u
C256
VUSB_USB
VBAT
100K
R220
C257
1u
_PPR
CHG_EN
_EOC
OVP_VUSB
OVP_VCHG
Figure 18 Microphone circuit
Figure 19 Charging circuit
Содержание KF350
Страница 1: ...Service Manual Model KF350 Service Manual KF350 Date October 2008 Issue 1 0 Internal Use Only ...
Страница 127: ... 128 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 174: ...Note ...
Страница 175: ...Note ...