TFA9812_2
© NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
60 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
V
P
= 12 V; f
i
= 1 kHz; Power dissipation in junction only
(1) R
L
= 2
×
6
Ω
(2) R
L
= 2
×
8
Ω
V
P
= 12 V; f
i
= 1 kHz;
η
po
= (2
×
P
o
) / (2
×
P
o
+ P
d
)
(1) R
L
= 2
×
6
Ω
(2) R
L
= 2
×
8
Ω
Fig 25. Power dissipation as a function of output
power
Fig 26. Efficiency as a function of output power
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1
2
3
P
(W)
0
P
o
(W/channel)
10
−
2
10
2
10
10
−
1
1
(1)
(2)
P
o
(W/channel)
0
10
8
4
6
2
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40
60
20
80
100
η
PO
(%)
0
(1)
(2)
V
P
= 12 V; P
O
= 1 W
(1) R
L
= 2
×
6
Ω
(2) R
L
= 2
×
8
Ω
Fig 27. Channel separation as a function of frequency
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−
60
−
40
−
80
−
20
0
α
cs
(dB)
−
100
f (Hz)
10
10
5
10
4
10
2
10
3
(1)
(2)
