TPA2000D4

STEREO 2W CLASSD AUDIO POWER AMPLIFIER

WITH STEREO HP AMPLIFIER

SLOS337B − DECEMBER 2000 − REVISED NOVEMBER 2005

6

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TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

Efficiency

vs Output power

2, 3

FFT at 1.5-W Output Power

vs Frequency

4

Supply current

vs Free-air temperature

5

Total harmonic distortion + noise

vs Frequency

6, 7

Total harmonic distortion + noise

vs Output power

8, 9

Class-D gain and phase

vs Frequency

10

Class-D crosstalk

vs Frequency

11

Power dissipation

vs Output power

12

FFT at 1.5-W output power

vs Frequency

13

Supply voltage rejection ratio

vs Frequency

14

Headphone total harmonic distortion + noise

vs Frequency

15, 16, 22

Headphone total harmonic distortion + noise

vs Output power

17

Headphone closed-loop gain and phase

vs Frequency

18

Headphone open-loop gain and phase

vs Frequency

19

Headphone crosstalk

vs Frequency

20, 24

Headphone supply voltage rejection ratio

vs Frequency

21

Headphone total harmonic distortion + noise

vs Output voltage

23

Headphone supply current

vs Output voltage

25

Headphone supply current

vs Output power

26

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 Figure 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 Figure 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