Texas Instruments TPA005D02 - Manual (Page 44)

TPA005D02 Class D EVM Measured Characteristics
3-30 Details
3.6 TPA005D02 Class D EVM Measured Characteristics
The TPA005D02 Class D Stereo Audio Power Amplifier EVM was tested using
an Audio Precision 2322, a 5-V regulated DC power supply, the TI PNP Audio
Power Amplifier Evaluation Platform set up as described in Chapter 2, and 4-W
speaker loads. The results are shown in Figures 3–22 through 3–25. The
TPA005D02 class D EVM exhibits slightly less harmonic distortion at high
power levels when used in the stand-alone mode.
The EVM has a flat response over the audio frequency band, as shown in
Figure 3–22. Both channels track closely; however, the response will change
slightly with the tolerance of the filter components. The lower and upper
frequency corners can be adjusted to extend frequency response as
described in sections 3.2.3.1 and 3.2.3.2.
Figure 3–22. Frequency Response
27
26
24
23
22
16
25
10 20 100 1k
V
oltage
Amplification – dB
f – Frequency – Hz
VOLTAGE AMPLIFICATION
vs
FREQUENCY
10k 20k
21
20
18
17
19
VDD = 5 V
RL = 4 Ω
Left Channel
Right Channel