Filter
Top Products
TFA9812_2 © NXP B.V. 2009. All rights reserved.
Preliminary data sheet Rev. 02 — 22 January 2009 58 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
V
P
= 12 V; V
ripple
= 500 mV (RMS) reference to ground;
No input signal
(1) R
L
= 8 Ω
(2) R
L
= 6 Ω
V
P
= 15 V; 20 kHz AES17 filter
(1) R
L
= 2 × 8 Ω
(2) R
L
= 2 × 6 Ω
Fig 21. SVRR as a function of frequency Fig 22. S/N ratio as a function of output power
010aaa488
−60
−40
−80
−20
0
SVRR
(dB)
−100
f
i
(Hz)
10 10
5
10
4
10
2
10
3
(1)
(2)
010aaa489
70
80
60
90
100
S/N
(dB)
50
P
o
(W/channel)
10
−2
10
2
1010
−1
1
(1)
(2)
a. V
P
= 15 V; R
L
= 2 × 6 Ω BTL; f
i
= 1 kHz b. V
P
= 20 V; R
L
= 2 × 8 Ω BTL; f
i
= 1 kHz
(1) T
act(th_fold)
= 125 °C
(2) T
act(th_fold)
= 105 °C
(3) T
act(th_fold)
= 90 °C
Fig 23. Output power as a function of time
time (s)
0 600480240 360120
010aaa490
10
15
5
20
25
P
o
(W/chan.)
0
(1)
(2)
(3)
time (s)
0 600480240 360120
010aaa491
10
15
5
20
25
P
o
(W/chan.)
0
(1)
(2)
(3)