TFA9812_2
© NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
57 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
a. V
P
= 12 V; R
L
= 2
×
6
Ω
; P
o
= 1 W
b. V
P
= 12 V; R
L
= 2
×
8
Ω
; P
o
= 1 W
Fig 18. Total harmonic distortion-plus-noise as a function of frequency
010aaa484
1
10
−
1
10
THD+N
(%)
10
−
2
f (Hz)
10
10
5
10
4
10
2
10
3
010aaa485
1
10
−
1
10
THD+N
(%)
10
−
2
f (Hz)
10
10
5
10
4
10
2
10
3
V
P
= 12 V; P
O
= 1 W
(1) R
L
= 6
Ω
15
µ
H / 680
µ
F
(2) R
L
= 8
Ω
15
µ
H / 680
µ
F
V
P
= 12 V; R
L
= 8
Ω
; f
i
= 1 kHz
(1) 0 dB
(2) 24 dB gain boost
Fig 19. Gain as a function of frequency
Fig 20. Gain as a function of AVOL
010aaa486
−
1
1
3
G
(dB)
−
3
f (Hz)
10
10
5
10
4
10
2
10
3
(1)
(2)
AVOL (V)
0
3
2
1
0.5
1.5
2.5
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−
80
−
100
−
60
−
20
−
40
0
G
(dB)
−
120
(1)
(2)
