NXP Semiconductors TFA9812 Fig 21. SVRR as a function of frequency Fig 22. S/N ratio as a function of output power, Fig 23. Output power as a function of time, a. VP = 15 V; RL = 2 6 BTL; fi = 1 kHz b. VP = 20 V; RL = 2 8 BTL; fi = 1 kHz

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 I2S input
VP = 12 V; Vripple = 500 mV (RMS) reference to ground;
No input signal
(1) RL = 8 Ω
(2) RL = 6 Ω
VP = 15 V; 20 kHz AES17 filter
(1) RL = 2 × 8 Ω
(2) RL = 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
fi (Hz)
10 105
104 102103
(1)
(2)
010aaa489
70
80
60
90
100
S/N
(dB)
50
Po (W/channel)
10−2102
1010−11
(1)
(2)
a. VP = 15 V; RL = 2 × 6 Ω BTL; fi = 1 kHz b. VP = 20 V; RL = 2 × 8 Ω BTL; fi = 1 kHz
(1) Tact(th_fold) = 125 °C
(2) Tact(th_fold) = 105 °C
(3) Tact(th_fold) = 90 °C
Fig 23. Output power as a function of time
time (s)
0 600480240 360120
010aaa490
10
15
5
20
25
Po
(W/chan.)
0
(1)
(2)
(3)
time (s)
0 600480240 360120
010aaa491
10
15
5
20
25
Po
(W/chan.)
0
(1)
(2)
(3)