AN10436 PHILIPS [NXP Semiconductors], AN10436 Datasheet - Page 51

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

NXP Semiconductors
AN10436_1
Application note
Fig 58. S/N ratio as a function of output power
Fig 60. Efficiency as a function of output power
(dB)
S/N
(%)
po
120
100
R
(1) 4 Ω BTL @ V
(2) 8 Ω BTL @ V
f
(1) 4 Ω BTL @ V
(2) 8 Ω BTL @ V
Remark: η
i
80
40
80
60
40
20
i
= 1 kHz
0
10
0
= 0 Ω
0
2
po
(1)
(2)
10
= (P
1
P
P
P
P
o
10
= 12 V
= 22 V
= 12 V
= 22 V
) / (P
o
+ P)
1
(2)
(1)
20
10
P
o
P
001aae118
001aae119
(W)
o
(W)
Rev. 01 — 12 December 2007
10
30
2
Fig 59. Maximum output power as a function of supply
Fig 61. Power dissipation as a function of output power
(W)
(W)
P
P
o
f
(1) 4 Ω BTL @ THD+N = 10 %
(2) 4 Ω BTL @ THD+N = 0.5 %
(3) 8 Ω BTL @ THD+N = 10 %
(4) 8 Ω BTL @ THD+N = 0.5 %
voltage
3.0
2.0
1.0
f
(1) 4 Ω BTL @ V
(2) 8 Ω BTL @ V
Remark: Power dissipation in junction only
i
i
70
60
50
40
30
20
10
= 1 kHz
0
= 1 kHz
0
10
10
2
TDA8932B/33(B) Class-D audio amplifier
14
10
(2)
(1)
1
(1)
(2)
P
P
18
= 12 V
= 22 V
22
1
(3)
(4)
26
AN10436
© NXP B.V. 2007. All rights reserved.
10
P
30
001aae120
001aaf893
o
V
(W)
P
(V)
10
34
2
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