TPA2000D2

2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS291B – MARCH 2000 – REVISED APRIL 2000

5

POST OFFICE BOX 655303

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

η

Efficiency

vs Output power

2, 3

In-band output spectrum

vs Frequency

4

THD+N

Total harmonic distortion plus noise

vs Output power

5 – 7

THD+N

Total harmonic distortion plus noise

vs Frequency

8, 9

test set-up for graphs

The THD+N measurements shown do not use an LC output filter, but use a low pass filter with a cut-off frequency

of 20 kHz so the switching frequency does not dominate the measurement. This is done to ensure that the

THD+N measured is just the audible THD+N. The THD+N measurements are shown at the highest gain for

worst case.

The LC output filter used in the efficiency curves (Figure 2 and 3) is shown in Figure 1.

L1 = L2 = 22

µH (DCR = 110 mΩ,

Part Number = SCD0703T–220 M–S,

Manufacturer = GCI)

C1 = C2 = 1

µF

The ferrite filter used in the efficiency curves (Figure 2 and 3) is shown in Figure 1, where L is a ferrite bead.

L1 = L2 = ferrite bead (part number = 2512067007Y3, manufacturer = Fair-Rite)

C1 = C2 = 1 nF

C2

C1

L1

L2

OUT–

OUT+

Figure 1. Class-D Output Filter