Philips TDA8922, Техническое описание

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2003 Mar 20 27
Philips Semiconductors Objective specification
2
×
25 W class-D power amplifier TDA8922
handbook, halfpage
MGX334
2
0
4
8
6
10
(1)
(2)
Po (W)
10
−
2
10
−
1
1 10 10
2
Vripple(p-p)
(V)
Fig.30 Supply voltage ripple as a function of output
power.
3000
µ
F per supply line; f
i
= 10 Hz.
(1) 1
×
4
Ω
SE, V
P
=
±
15 V.
(2) 1
×
8
Ω
SE, V
P
=
±
20 V.
handbook, halfpage
MGX335
Vripple(p-p)
(V)
2
0
4
8
6
10
fi (Hz)
10 10
2
10
3
10
4
(1)
(2)
Fig.31 Supply voltage ripple as a function of input
frequency.
3000
µ
F per supply line.
(1) P
o
= 10 W into 1
×
4
Ω
SE, V
P
=
±
15 V.
(2) P
o
= 10 W into 1
×
8
Ω
SE, V
P
=
±
20 V.
handbook, halfpage
MGX342
100 400 200 500 600
fclk (kHz)
300
THD
+
N
(%)
10
1
10
−
1
10
−
2
10
−
3
(1)
(2)
(3)
Fig.32 THD + N as a function of clock frequency.
V
P
=
±
20 V; P
o
= 1 W into 8
Ω
.
(1) 10 kHz.
(2) 1 kHz.
(3) 100 Hz.
handbook, halfpage
Iq
(mA)
100 400 200 500 600
fclk (kHz)
300
0
150
90
120
30
60
MGX344
Fig.33 Quiescent current as a function of clock
frequency.
V
P
=
±
20 V; R
L
=
∞
.