TFA9812_2
© NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
6 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
shows the block diagram of the TFA9812. For a detailed description of the audio
signal path see
.
7.
Pinning information
7.1 Pinning
Fig 2.
Pin configuration, transparent top view
Table 3.
Pinning description TFA9812
Pin
Symbol
Type
Description
1
XTALIN
I
Crystal oscillator input
2
XTALOUT
O
Crystal oscillator output
3
V
DDA(3V3)
P
Analog supply voltage (3.3 V)
4
STABA
O
1.8 V analog stabilizer output
5
REFA
P
Analog reference voltage
6
V
DDA
P
Analog supply voltage (8 V to 20 V)
7
TEST1
I
Test signal input 1. For test purposes only (connect to V
SS
)
8
V
SS1
P
PCB ground reference
9
STAB2
O
Decoupling of internal 11 V regulator for channel 2 drivers
10
V
SSP2
P
Negative power supply voltage for channel 1 and channel 2
11
V
SSP2
P
Negative power supply voltage for channel 1 and channel 2
12
BOOT2N
O
Bootstrap high-side driver negative PWM output channel 2
13
OUT2N
O
Negative PWM output channel 2
010aaa218
TFA9812HN
BOOT1N
V
SSP2
BOOT2N
V
SSP1
V
SSP2
V
SSP1
STAB2
STAB1
V
SS1
DIAG
TEST1
CDELAY
V
DDA
POWERUP
REFA
AVOL
STABA
ENABLE
V
DDA(3V3)
GAIN
XTALOUT
CSEL
XTALIN
ADSEL2/PLIM2
OUT2N
OUT2N
BOOT1P
OUT2P
OUT1P
V
DDP
V
DDP
OUT1P
OUT1P
BOOT1P
OUT1N
OUT1N
V
SS2
MCLK
BCK
WS
DATA
TEST2
REFD
STABD
V
DDD(3V3)
SDA/MS
SCL/SFOR
ADSEL1/PLIM1
12
25
11
26
10
27
9
28
8
29
7
30
6
31
5
32
4
33
3
34
2
35
1
36
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
terminal 1
index area
Transparent top view
