2003 Mar 20
22
Philips Semiconductors
Objective specification
2
×
25 W class-D power amplifier
TDA8922
16.12 Curves measured in reference design
The curves illustrated in Figs 20 and 21 are measured with
a specified load impedance. Spread in Z
L
(e.g. due to the
frequency characteristics of the loudspeaker) can trigger
the maximum current protection circuit; see Section 16.6.
The curves illustrated in Figs 30 and 31 show the effects
of supply pumping when only one single-ended channel is
driven with a low frequency signal; see Section 16.7.
handbook, halfpage
MGX324
Po (W)
10
−
2
10
−
1
1
10
10
2
THD
+
N
(%)
10
2
10
1
10
−
1
10
−
2
10
−
3
(1)
(2)
(3)
Fig.12 THD + N as a function of output power.
2
×
8
Ω
SE; V
P
=
±
20 V.
(1) 10 kHz.
(2) 1 kHz.
(3) 100 Hz.
handbook, halfpage
MGX327
fi (Hz)
10
10
2
10
3
10
4
10
5
THD
+
N
(%)
10
2
10
1
10
−
1
10
−
2
10
−
3
(1)
(2)
Fig.13 THD + N as a function of input frequency.
2
×
8
Ω
SE; V
P
=
±
20 V.
(1) P
o
= 10 W.
(2) P
o
= 1 W.
