Texas Instruments APA100 - Manual (Page 39)

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
0 10 20 30 40 50 60 70 80
− System Output Stage Efficiency − %
h
P
O
− Output Power − W
f = 1 kHz,
R
L
= 4 W ,
T
C
= 75 5 C