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3. TECHNICAL BRIEF
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3.13.1. Audio amplifier sub system IC with 3D effect
Audio amplifier sub system IC is an audio power amplifier capable of delivering 540mW of
continuous average power into a mono 8ߟ bridged-tied load(BTL) with 1% THD+N, 35mW per
channel of continuous average power into stereo 32ߟ single-ended (SE) loads with 1% THD+N
from a 3.3V Power supply. The LM4946 features a 32-step digital volume control and eight distinct
output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are
programmed through a two-wire I2C interface that allows flexibility in routing and mixing audio
channels.
47p
C316
TP304
220n
C313
R309
100K
VBAT
0.1u
C369
C361
220n
0.01u
C320
2V85_IO2
C310
22p
22p
C311
1u
C357
FB310
FB309
C323
0.068u
4.7u
C304
C306
0.1u
47p
C317
3
VDD2
16
VOC
2
13
LHP3D1
18
1
LHP3D2
9
LIN
LOUT
6
MONO+
15
MONO-
17
23
22
MONO_IN-
25
PGND
19
RHP3D1
24
RHP3D2
8
RIN
5
ROUT
11
SCL
10
SDA
VDD1
U301
LM4946SQX
21
CBYPASS
4
GND1
GND2
12
GND3
20
I2CSPI_SEL
14
7
I2CSPI_VDD
ID_ENB
0.068u
C324
PG05DBTFC
D310
C312
220n
TP303
C362
220n
OUT302
2.2u
C358
D309
PG05DBTFC
OUT301
SNDOUT_R
SNDOUT_L
AMP_IN_L
AMP_IN_R
AMP_OUT_L
AMP_OUT_R
SCL
SDA
Figure 23 Audio amplifier Sub-system IC
0
R327
10
1A
9
1
1B0
2
1B1
8
1S
6
2A
2B0
3
2B1
4
7
2S
GND
5
VCC
FSA2267L10X
U302
100K
R331
2V85_IO2
0
R330
0.01u
C329
AMP_IN_L
AMP_IN_R
SNDOUT_L
SNDOUT_R
FM_L
FM_MAIN
FM_R
Figure 24 Audio signal distribute analog switch
Summary of Contents for KE600
Page 1: ...Date October 2006 Issue 1 0 Service Manual Model KE600 Service Manual KE600 ...
Page 3: ... 4 ...
Page 5: ... 6 ...
Page 53: ...3 TECHNICAL BRIEF 54 3 16 BLUETOOTH Figure 28 BLUETOOTH Functional block diagram ...
Page 69: ...4 PCB layout 70 Figure 45 Main PCB bottom Figure 46 Main PCB bottom placement ...
Page 70: ...4 PCB layout 71 Figure 47 Sub PCB top Figure 48 Sub PCB top placement ...
Page 71: ...4 PCB layout 72 Figure 49 Sub PCB bottom Figure 50 Sub PCB bottom placement ...
Page 89: ...5 Trouble shooting 90 ...
Page 116: ...6 Download S W upgrade 117 6 2 Download program user guide ...
Page 117: ... 118 6 Download S W upgrade ...
Page 118: ... 119 6 Download S W upgrade ...
Page 119: ... 120 6 Download S W upgrade ...
Page 127: ... 128 8 PCB LAYOUT ...
Page 128: ... 129 8 PCB LAYOUT ...
Page 129: ... 130 8 PCB LAYOUT ...
Page 130: ... 131 8 PCB LAYOUT ...
Page 131: ... 132 ...
Page 143: ... 144 ...
Page 145: ... 146 ...
Page 167: ...Note ...
Page 168: ...Note ...