AN10436 PHILIPS [NXP Semiconductors], AN10436 Datasheet - Page 21
AN10436
Manufacturer Part Number
AN10436
Description
TDA8932B/33(B) Class-D audio amplifier
Manufacturer
PHILIPS [NXP Semiconductors]
Datasheet
1.AN10436.pdf
(55 pages)
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Application note
Fig 12. BTL output power as a function of supply
(W)
P
o
80
60
40
20
0
a. THD+N = 0.5 %
voltage
10
3.1.2 TDA8933(B) output power estimation
20
Remark:
R
Remark:
R
The horizontal parts in the figures indicate the region where current limiting becomes
active, when a level of 4.0 A (minimum) is taken into account. It is recommended to avoid
these regions because current limiting will cause unwanted distortion (see
Figure
TDA8933(B) at THD = 0.5 % and THD = 10 % as a function of supply voltage for SE and
BTL for different load impedances.
s
s
= 0.05 Ω, R
= 0.05 Ω and I
14,
Figure 10
Figure 12
30
Figure
R
L
= 8
ESR
V
6
4
P
001aad770
O(ocp)
(V)
15,
= 0.05 Ω and I
and
and
Rev. 01 — 12 December 2007
Figure
40
= 4.0 A (minimum).
Figure 11
Figure 13
16, and
O(ocp)
are calculated with R
are calculated with R
Fig 13. BTL output power as a function of supply
Figure 17
(W)
P
= 4.0 A (minimum).
o
80
60
40
20
0
b. THD+N = 10 %
voltage
10
TDA8932B/33(B) Class-D audio amplifier
show the estimated output power for the
20
DSon
DSon
= 0.15 Ω (at T
= 0.15 Ω (at T
R
L
30
= 8
6
4
AN10436
© NXP B.V. 2007. All rights reserved.
V
P
001aad771
(V)
j
j
Section
= 25 °C),
= 25 °C),
40
3.2).
21 of 55
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