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2004 May 05 17
Philips Semiconductors Preliminary specification
Power stage 2 x 10 or 1 x 20 W class-D
audio amplifier
TDA8928J
15.5 Curves measured in reference design
handbook, halfpage
MGX383
10
−2
10
−1
11010
2
THD + N
(%)
10
2
10
1
10
−1
10
−2
10
−3
P
o
(W)
(2)
(1)
(3)
Fig.9 THD + N as function of output power.
2 × 8 Ω SE; V
P
= ±12.5 V.
(1) 6 kHz.
(2) 1 kHz.
(3) 100 Hz.
handbook, halfpage
MGX384
10
10
2
10
3
10
4
10
5
10
2
10
1
10
−1
10
−3
10
−2
f
i
(Hz)
THD + N
(%)
(1)
(2)
Fig.10 THD + N as function of frequency.
2 × 8 Ω SE; V
P
= ±12.5 V.
(1) P
o
=10W.
(2) P
o
=1W.
handbook, halfpage
010
100
0
20
40
60
80
2468
η
(%)
P
o
(W)
MGX385
Fig.11 Efficiency as function of output power.
2 × 8 Ω SE; V
P
= ±12.5 V; f
i
= 1 kHz.
handbook, halfpage
(4)
MGX386
SVRR
(dB)
−60
−50
−30
−40
−20
−10
0
f
i
(Hz)
10
10
2
10
3
10
4
10
5
(2)
(1)
(3)
Fig.12 SVRR as function of frequency.
V
P
= ±12.5 V; V
ripple(p-p)
=2V.
(1) Both supply lines in phase.
(2) One supply line (V
SS
) rippled.
(3) One supply line (V
DD
) rippled.
(4) Both supply lines in antiphase.