- 46 -
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. Technical Brief
3.13.1. Audio amplifier
Audio amplifier sub system IC is an audio power amplifier capable of delivering 1.2 W of continuous
average power into a mono 8
Ω
load, 50mW per channel of continuous average power into stereo 32
Ω
single-ended (SE) loads. The MAX9877 features a 32-step digital volume control and ten distinct output
modes. The digital volume control, output modes (mono/SE/OCL) are programmed through a two-wire
I2C interface that allows flexibility in routing and mixing audio channels.
Figure 18. Audio amplifier PMIC
0
R235
R211
2.2
C200
1U
VBAT
R218
2.2
27P
C211
VBAT
MAX9877AEWP_TG45
U200
4
C
3
D
B4
D4
C3
B3
B5
B2
D5
C2
C1
D2
D1
A2
A1
A5
A4
5
C
1
B
3
A
S
S
V
D
D
V
D
D
V
P
C1N
C1P
HPR
HPL
INA2
INA1
INB2
INB1
OUT+
BIAS
OUT-
SDA
SCL
RXIN+
RXIN-
D
N
G
D
N
G
P
1U
C225
2.2U
C230
1U
C231
R240
0
R241
0
C238
1U
1U
C247
C249
2.2U
1U
C255
C258
1U
C259
27P
BB_SND_R
SDA
SCL
BB_SND_L
EAR_P
EAR_N
SPK_RCV_N
SPK_RCV_P
FM_SND_L
FM_SND_R
HSO_R
HSO_L
Содержание AR140B
Страница 1: ...Service Manual Model GD310 Internal Use Only Service Manual GD310 Date November 2009 Issue 1 0 ...
Страница 127: ... 128 LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 145: ... 146 LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...