NXP Semiconductors TFA9812 - Manual (Page 58)

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
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−
60
− 40
− 80
− 20
0
SVRR
(dB)
− 100
f i (Hz)
10 10 5 10 4 10 2 10 3
(1)
(2)
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70
80
60
90
100
S/N
(dB)
50
P o (W/channel)
10
− 2 10 2 10 10
− 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)
0 600 480 240 360 120
010aaa490
10
15
5
20
25
P o
(W/chan.)
0
(1)
(2)
(3)
time (s)
0 600 480 240 360 120
010aaa491
10
15
5
20
25
P o
(W/chan.)
0
(1)
(2)
(3)