TFA9812_2 © NXP B.V. 2009. All rights reserved.
Preliminary data sheet Rev. 02 — 22 January 2009 59 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
(1) Power limiter = 0 dB
(2) Power limiter = −1.5 dB
(3) Power limiter = −3 dB
(4) Power limiter = −4.5 dB
(1) Power limiter = 0 dB
(2) Power limiter = −1.5 dB
(3) Power limiter = −3 dB
(4) Power limiter = −4.5 dB
a. V
P
= 12 V; R
L
= 2 × 6 Ω; f
i
= 1 kHz; THD = 1 % b. V
P
= 12 V; R
L
= 2 × 6 Ω; f
i
= 1 kHz; THD = 10 %
(1) Power limiter = 0 dB
(2) Power limiter = −1.5 dB
(3) Power limiter = −3 dB
(4) Power limiter = −4.5 dB
(1) Power limiter = 0 dB
(2) Power limiter = −1.5 dB
(3) Power limiter = −3 dB
(4) Power limiter = −4.5 dB
c. V
P
= 15 V; R
L
= 2 × 8 Ω; f
i
= 1 kHz; THD = 1 % d. V
P
= 15 V; R
L
= 2 × 8 Ω; f
i
= 1 kHz; THD = 10 %
Fig 24. Output power as a function of supply voltage
010aaa492
V
P
(V)
82016 1812 1410
10
15
5
20
25
P
o
(W/chan.)
0
(1)
(2)
(3)
(4)
010aaa493
V
P
(V)
8201816141210
10
15
5
20
25
P
o
(W/chan.)
0
(1)
(2)
(3)
(4)
010aaa494
V
P
(V)
820161210 14 18
10
15
5
20
25
P
o
(W/chan.)
0
(1)
(2)
(3)
(4)
010aaa495
V
P
(V)
820161210 14 18
10
15
5
20
25
P
o
(W/chan.)
0
(1)
(2)
(3)
(4)
