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3. TECHNICAL BRIEF
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3.6 Audio
KE800 Audio signal flow diagram as following diagram
3.6.1. 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 8Ω bridged-tied load(BTL) with 1% THD+N, 35mW per channel of continuous
average power into stereo 32Ω 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.
Figure 3-8 Audio signal flow diagram
Figure 3-9 Audio amplifier Sub-system IC
C244
220n
C248
0.068u
0.068u
C239
R220
4.7K
2V85_IO2
47p
C238
100K
R219
C233
0.1u
1u
C232
MONO-
17
23
22
MONO_IN-
25
PGND
19
RHP3D1
24
RHP3D2
8
RIN
5
ROUT
11
SCL
10
SDA
VDD1
3
VDD2
16
VOC
2
21
CBYPASS
4
GND1
GND2
12
GND3
20
I2CSPI_SEL
14
7
I2CSPI_VDD
ID_ENB
13
LHP3D1
18
1
LHP3D2
9
LIN
LOUT
6
MONO+
15
U209
LM4946SQX
1u
R223
4.7K
VBAT
C235
2.2u
C247
0.1u
C231
220n
C245
C237
C230
47p
4.7u
C236
1u
AMP_IN_L
AMP_IN_R
SPK_P
BBP_SND_L
BBP_SND_R
HS_OUT_L
HS_OUT_R
SPK_N
SCL
SDA
FM_BBP_SEL
AMP_IN_R
Содержание Chocolate KE800
Страница 1: ...Service Manual Model KE800 Service Manual KE800 Date January 2007 Issue 1 0 ...
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Страница 26: ...4 Trouble Shooting 27 Touch pad driver LDO LCD connector Charge pump IC Figure 4 4 Sub PCB Top ...
Страница 82: ...6 SW Download 83 KE800 KE800P40 7 V10g 9 Download complete ...
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Страница 96: ... 97 8 PCB LAYOUT ...
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Страница 109: ... 110 9 CALIBRATION 9 2 Calibration procedure 9 2 1 Turn on the Phone 9 2 2 Execute HK_24 exe 9 2 3 Click SETTING Menu ...
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Страница 141: ...Note ...
Страница 142: ...Note ...