NXP Semiconductors TDA8932B, Лист данных продукта

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TDA8932B_3 © NXP B.V. 21 June 2007. All rights reserved.
Product data sheet Rev. 03— 21 June 2007 35 of 48
NXP Semiconductors
TDA8932B
Class-D audio amplifier
a. R
L
= 4
Ω
; f
i
= 1 kHz; 2 layer SO32 application
board (55 mm
×
45 mm) without heat sink
b. R
L
= 8
Ω
; f
i
= 1 kHz; 2 layer SO32 application
board (55 mm
×
45 mm) without heat sink
(1) V
P
= 12 V
(2) V
P
= 13.5 V
(3) V
P
= 15 V
(1) V
P
= 22 V
(2) V
P
= 26 V
(3) V
P
= 29 V
Fig 32. Output power as a function of time
t (s)
0 600 480 240 360 120
001aaf896
16
8
24
32
0
P
o
(W)
(2)
(1)
(3)
t (s)
0 600 480 240 360 120
001aaf899
20
40
60
10
30
50
P
o
(W)
0
(2)
(1)
(3)
f
i
= 1 kHz;
(1) V
P
= 12 V; R
L
= 4
Ω
(2) V
P
= 22 V; R
L
= 8
Ω
f
i
= 1 kHz; power dissipation in junction only
(1) V
P
= 12 V; R
L
= 4
Ω
(2) V
P
= 22 V; R
L
= 8
Ω
Fig 33. Output power efficiency as a function of output
power
Fig 34. Power dissipation as a function of output power
001aae119
P
o
(W)
0 30 20 10
40
60
20
80
100
η
po
(%)
0
(2)
(1)
001aae120
1.0
2.0
3.0
P
(W)
0
P
o
(W)
10
−
2
10
2
10 10
−
1
1
(2)
(1)
η
PO
P
o
P
o
p +
( )
-------------------- =