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. RL=4Ω; fi= 1 kHz; 2 layer SO32 application
board (55 mm ×45 mm) without heat sink b. RL=8Ω; fi= 1 kHz; 2 layer SO32 application
board (55 mm ×45 mm) without heat sink
(1) VP=12V
(2) VP= 13.5 V
(3) VP=15V
(1) VP=22V
(2) VP=26V
(3) VP=29V
Fig 32. Output power as a function of time
t (s)
0 600480240 360120
001aaf896
16
8
24
32
0
Po
(W)
(2)
(1)
(3)
t (s)
0 600480240 360120
001aaf899
20
40
60
10
30
50
Po
(W)
0
(2)
(1)
(3)
fi= 1 kHz;
(1) VP= 12 V; RL=4Ω
(2) VP= 22 V; RL=8Ω
fi= 1 kHz; power dissipation in junction only
(1) VP=12V; R
L=4Ω
(2) VP=22V; R
L=8Ω
Fig 33. Output power efficiency as a function of output
power Fig 34. Power dissipation as a function of output power
001aae119
Po (W)
0302010
40
60
20
80
100
ηpo
(%)
0
(2)
(1)
001aae120
1.0
2.0
3.0
P
(W)
0
Po (W)
10−2102
1010−11
(2)
(1)
ηPO
Po