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)
8
28
50
0
10
20
30
40
12
P
o
(W)
16
20
24
V
CC
(V)
mce491
0
20
P
o
(W)
10
0
2
4
6
8
4
P
tot
(W)
8
12
16
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
