10.
Circuit Diagrams and PWB Layouts
Extension Board: Audio amplifier
5
4
3
2
1
D
C
B
A
A
SPKRO-
SPKRO+
AMP_M
U
TE
SPKLO+
SPKLO-
MUTE
AMP_SLEEP
Audio_SLEEP
AUDIO_R
AUDIO_L
+12V_SW
+5V_SW
PROTN
AUDIO_L
5
AUDIO_R
5
AUD_GAIN1
9
AUD_GAIN0
9
AUD_NCDRC1
9
AUD_NCDRC0
9
MUTE
4,5
+12V_SW 4,7,9,11
SPKLO+
7
SPKLO-
7
SPKRO+
7
SPKRO-
7
Audio_SLEEP 9
+5V_SW
1,3,4,9
Limit
9
AGND
AGND
AGND
+3.3AVDD_AMP
+3.3AVDD_AMP
VCC_AMP
VCC_AMP
A9VOUT
+3.3V_ADU
VCC_AMP
+3.3V_ADU
+12V_SW
+3.3V_ADU
VCC_AMP
+5VSB
+3.3V
AGND
AGND
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Approval:
Draw:
No.361,5F.,Fu-Sing 1 Rd.,Gueishan Hsiang, Taoyuan, Taiwan
TechView International Technology Inc.
Tel :+886-3-3287088
Fax:+886-3-3288066
B2A
08.Audio AMP
A4
6
11
Friday, January 09, 2009
<Doc>
Standard Circuit Design
<PCB Name>
<Rev>
1uF < C396 < 4.7uF
LC Filter for 8 ohm
L
+ (34)/46 dB
H
H
H
+ (16)/28 dB
+ (28)/40 dB
Gain0
H
Gain1
+ (22)/34 dB
L
Total Gain
L
L
H
DRC2
DRC1
Non-clip
(Normal)
Mode
H
L
H
H
L
L
L
DRC1
DRC0
Q47
DTC144E
1
3
2
R388
120K/6/NC
+
C206
100uF/25V
R554
0R/6
Q48
DTC144E
1
3
2
R393
47K/6
L52
121A4/8/NC
C195
1uF/6
R390
82K/6/NC
L47
22uH
R368
47K/6
R384
0R/6
R386
200K/6
C191
0.22uF/8
C192
0.1uF/8
+
C212
470uF/16V
C198
220pF/6/NC
L82 121A4/8
C210
0.1uF/6
C189
0.1uF/8
R372
10K/6
U27
YDA148
PVDDREG
1
AVDD
2
INLP
3
INLM
4
VREF
5
INRM
6
INRP
7
AVSS
8
PLIMIT
9
PVDDPR
10
OUTPR1
12
PVSSR
13
OUTMR2
14
OUTMR1
15
PVDDMR
16
SLEEPN
17
PROTN
18
CKOUT
20
MUTEN
19
CKIN
21
NCDRC0
22
NCDRC1
23
GAIN0
24
GAIN1
25
PVDDML
26
OUTML1
27
OUTML2
28
PVSSL
29
OUTPL1
30
OUTPL2
31
PVDDPL
32
OUTPR2
11
HEAT PAD
33
CASE
35
CASE
34
CASE
36
CASE1
37
TP1
L48
22uH
C209
1uF/6
R380
75R/6/NC
C204
1uF/6
C199
1uF/6
R383
NC
R385
82K/6
C207
1uF/6/NC
R382
10K/6
R558
10k/6/NC
L54
121A4/8
L49
22uH
C211
0.1uF/6/NC
+
C203
100uF
/2
5
V
R389
0R/6
R366
0R/6
L46
22uH
R387
10K/6
L55
121A4/8
R397
330R/6F
R374
0R/6/NC
R364
0R/6
R394
200R/6F
Q70
MMBT3904
3
1
2
C214
0.1uF/6
C201
1uF/6
C208
0.1uF/6
C197
0.22uF/8
R376
0R/6/NC
R378
75R/6
R370
10K/6/NC
R392
NC
C200
0.1uF/8
R379
75R/6/NC
R373
10K/6/NC
C194
1uF/6
C215
0
.1
u
F
/6
R391
NC
R559
4.7K/6
R381
75R/6
R369
0R/6
R365
47K/6
R375
0R/6/NC
C205
1uF/6
R377
0R/6/NC
U28
AP1117ELA/TO223
ADJ/GND
1
VOUT
2
VIN
3
OUT
4
C190
1uF/6
C216
0.1uF/6
R396
NC
L50
121A4/8
R395
3.3K/6
R371
10K/6
C196
0.1uF/8
C202
1uF/6
L51
121A4/8
R367
0R/6
C193
220pF/6/NC
+
C213
10uF/50V
1
8
4
3
0_526_090204.ep
s
090204