Filter
Top Products
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
010aaa496
1
2
3
P
(W)
0
P
o
(W/channel)
10
−2
10
2
1010
−1
1
(1) (2)
P
o
(W/channel)
0108462
010aaa497
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
010aaa498
−60
−40
−80
−20
0
α
cs
(dB)
−100
f (Hz)
10 10
5
10
4
10
2
10
3
(1)
(2)