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TFA9843AJ_1 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary data sheet Rev. 01 — 28 April 2006 9 of 19
Philips Semiconductors
TFA9843AJ
20 W stereo power amplifier with volume control
THD = 10 %; R
L
= 4 Ω; f = 1 kHz V
CC
= 18 V; R
L
= 4 Ω
Fig 7. Output power as a function of supply voltage Fig 8. Total power dissipation as a function of channel
output power per channel (worst case, both
channels driven)
828
50
0
10
20
30
40
12
P
o
(W)
16 20 24
V
CC
(V)
mce491
020
P
o
(W)
10
0
2
4
6
8
4
P
tot
(W)
81216
mce507
V
CC
= 18 V; R
L
= 4 Ω V
CC
= 18 V; Z
S
= 0 Ω; V
ripple
= 300 mV (RMS); a
bandpass filter of 20 Hz to 22 kHz has been applied;
inputs short-circuited.
Fig 9. Channel separation as a function of frequency
(no bandpass filter applied)
Fig 10. Supply voltage ripple rejection as a function of
frequency
−100
0
−80
−60
−40
−20
mce495
10
α
cs
(dB)
f (Hz)
10
2
10
3
10
4
10
5
−80
−60
−40
−20
0
mce497
10
SVRR
(dB)
f (Hz)
10
2
10
3
10
4
10
5