Texas Instruments APA100 Manuale Utente Scaricare il pdf (Pagina 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

01020304050607080

− System Output Stage Efficiency − %

P

O

− Output Power − W

f = 1 kHz,

R

L

= 4 ,

T

C

= 755C

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