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Efficiency
5-5
Measured Results
5.3 Efficiency
The APA100 is a highly efficient class-D audio power amplifier. The efficiency
is greater than 85% efficient with 4- or 8-Ω load. The efficiency plot is shown
in Figure 5−7.
Figure 5−7. APA100 Efficiency vs Output Power With 4-W Load
100
90
80
70
60
50
40
30
20
10
0
01020304050607080
− System Output Stage Efficiency − %h
P
O
− Output Power − W
f = 1 kHz,
R
L
= 4 W,
T
C
= 755C