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TFA9812_2 © NXP B.V. 2009. All rights reserved.
Preliminary data sheet Rev. 02 — 22 January 2009 54 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
14.4.3 I
2
S master mode and Legacy control mode
Fig 15. Simplified application diagram for I
2
S master mode and Legacy control mode
TFA9812
ADSEL1/PLIM1
OUT1N
OUT1N
BOOT2P
OUT2P
OUT2P
V
DDP
V
DDP
OUT1P
OUT1P
BOOT1P
OUT2N
OUT2N
ADSEL2/PLIM2
XTALIN
XTALOUT
V
DDA(3V3)
STABA
REFA
V
DDA
TEST1
V
SS1
STAB2
V
SSP2
V
SSP2
BOOT2N
CSEL
24 dB GAIN
ENABLE
AVOL
POWERUP
CDELAY
DIAG
STAB1
V
SSP1
V
SSP1
BOOT1N
SCL/SFOR
SDA/MS
V
DDD(3V3)
STABD
REFD
TEST2
DATA
WS
BCK
MCLK
V
SS2
EXPOSED DIE PADDLE
36
37
38
39
40
41
42
43
44
45
46
47
48
35 34 33 32 31 30 29 28 27 26 25
ENABLE
DC-VOLUME CONTROL
POWERUP
DIAGNOSTIC
C
DELAY
1 nF
C
STAB
100 nF
I
2
S DATA
I
2
S WS
I
2
S BCK
I
2
S MLCK (optional)
V
DDD
C
vddd
100 nF
C
STABD
1 µF
C
VDDA
100 nF
3.3 V VPA
C
STAB
100 nF
C
VPA
100 nF
C
STAB
100 nF
12 3 4 56 789 101112
010aaa478
C
BOOT
15 nF
C
SN
470 pF
C
SN
470 pF
C
LC
680 nF
C
LC
680 nF
C
BOOT
15 nF
R
SN
10 Ω
R
SN
10 Ω
C
LC
680 nF
C
LC
680 nF
Lic
S2F2
S1 F1
15 µH
24
23
22
21
20
19
18
17
16
15
14
13
C
VDDP
C
VDDP
VP
OUT1
+
−
6 Ω to 8 Ω
OUT2
+
−
6 Ω to 8 Ω
C
BOOT
15 nF
C
BOOT
15 nF
F2 S2
F1S1
15 µH
Lic
R
SN
10 Ω
R
SN
10 Ω
C
SN
470 pF
C
SN
470 pF
POWER IN
V
P
= 8 V to 20 V
GND
C
VDDP
220 µF / 25 V
R
VDDA
10 Ω
VPA
VP
100 nF
100 nF
R
STABA
1 kΩ
XTALL
C
XTALL
18 pF
C
XTALL
18 pF
3.3 V