AN10436 PHILIPS [NXP Semiconductors], AN10436 Datasheet - Page 47

• Manufacturer Part Number: AN10436
• Description: TDA8932B/33(B) Class-D audio amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
AN10436_1
Application note
Fig 47. S/N ratio as a function of output power
Fig 49. Efficiency as a function of output power
(dB)
S/N
(%)
po
120
100
R
(1) 2 × 4 Ω SE @ V
(2) 2 × 8 Ω SE @ V
f
(1) 2 × 4 Ω SE @ V
(2) 2 × 8 Ω SE @ V
Remark: ηpo = (2 · P
i
80
40
80
60
40
20
i
= 1 kHz
0
10
0
= 0 Ω
0
2
10
5
1
P
P
P
P
= 22 V
= 30 V
= 22 V
= 30 V
o
) / (2 · P
10
1
o
+ P)
(2)
(1)
10
P
15
P
o
o
(W/channel)
(W/channel)
001aad778
001aad780
(2)
(1)
Rev. 01 — 12 December 2007
10
20
2
Fig 48. Channel separation as a function of frequency
Fig 50. Power dissipation as a function of output power
(dB)
(W)
P
cs
100
P
(1) = 2 × 4 Ω SE @ V
(2) = 2 × 8 Ω SE @ V
3.0
2.0
1.0
f
(1) = 2 × 4 Ω SE @ V
(2) = 2 × 8 Ω SE @ V
Remark: Power dissipation in junction only.
20
40
60
80
i
O
0
= 1 kHz
0
10
10
= 1 W, C
2
TDA8932B/33(B) Class-D audio amplifier
(1)
(2)
HVPREF
10
10
(2)
(1)
2
1
= 47 μF
P
P
P
P
= 22 V
= 30 V
= 22 V
= 30 V
10
1
3
AN10436
© NXP B.V. 2007. All rights reserved.
10
10
P
o
4
(W/channel)
001aad781
001aad779
f
i
(Hz)
10
10
2
5
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