TFA9812_2
© NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
3 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
4.
Quick reference data
[1]
I
P
is the current through the analog supply voltage (V
DDA
) pin added to the current through the power supply
voltage (V
DDP
) pin.
Table 1.
Quick reference table
Unless specified otherwise, V
DDA
= V
DDP
= 12 V, V
SSP1
= V
SSP2
= 0 V, V
DDA(3V3)
= V
DDD(3V3)
= 3.3 V,
V
SS1
= V
SS2
= REFD = REFA = 0 V, T
amb
= 25
°
C, R
L
= 8
Ω
, f
i
= 1 kHz, f
s
= 44.1 kHz, f
sw
= 400 kHz,
24-bit I
2
S input data, MCLK clock mode, typical application diagram (
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
General
V
DDA
analog supply
voltage
8
12
20
V
V
DDP
power supply
voltage
8
12
20
V
V
DDA(3V3)
analog supply
voltage (3.3 V)
3.0
3.3
3.6
V
V
DDD(3V3)
digital supply
voltage (3.3 V)
3.0
3.3
3.6
V
I
P
supply current
soft mute mode, with load,
filter and snubbers
connected
-
38
45
mA
sleep mode
-
160
270
µ
A
I
DDA(3V3)
analog supply
current (3.3 V)
operating mode
I
2
S slave mode
-
2
4
mA
I
2
S master mode
-
4
6
mA
sleep mode
V
DDA
= V
DDP
= 12 V
-
120
-
µ
A
V
DDA
= V
DDP
= 1 V
-
40
70
µ
A
I
DDD(3V3)
digital supply
current (3.3 V)
operating mode
I
2
S slave mode
-
15
25
mA
I
2
S master mode
-
25
40
mA
sleep mode;
DATA = WS = BCK =
MCLK = 0 V
-
4
30
µ
A
P
o(RMS)
RMS output power Continuous time output power per channel; THD = 10 %;
R
L
= 8
Ω
V
DDA
= V
DDP
= 12 V
-
8.3
-
W
V
DDA
= V
DDP
= 13.5 V
-
10
-
W
V
DDA
= V
DDP
= 15 V
-
12
-
W
Short time (
≤
10 s) output power per channel; THD = 10 %;
R
L
= 8
Ω
V
DDA
= V
DDP
= 17 V
-
15
-
W
η
po
output power
efficiency
R
L
= 8
Ω
; P
o(RMS)
= 8.3 W
-
88
-
%
