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Setup By Mode
10
1
0.1
0.01
0.001
0.0001
20
200
Figure 10. AIB Input: THD+N vs Frequency
10
1
0.1
0.01
0.001
0.0001
20
200
Figure 12. Molex Input: THD+N vs Frequency
10
1
0.1
0.01
0.001
0.0001
20
200
Figure 14. RCA Input: THD+N vs Frequency
2.4
SE Mode (Four-Speaker Output)
1. Set J6 to H and J5 to H.
2. Remove jumpers J22, J23, J24, and J25.
3. Connect the positive side of the load to the OUTA (J9-RED) terminal and the negative side of the load
to the GND (J11) terminal.
4. Connect the positive side of the load to the OUTB (J9-BLACK) terminal and the negative side of the
load to the GND (J11) terminal.
5. Connect the positive side of the load to the OUTC (J2-RED) terminal and the negative side of the load
to the GND (J20) terminal.
6. Connect the positive side of the load to the OUTD (J2-BLACK) terminal and the negative side of the
load to the GND (J20) terminal.
7. Set both J4 and J19 jumpers position to DIFF.
8. Input configuration:
a. Differential inputs: Set J26, J27, J34, and J35 to RCA.
i. Connect the male RCA jack to the female RCA jack input A/AB (J3-RED) for the OUTA
speaker.
8
TPA3251 Evaluation Module
1 W
50 W
2000
20000
Frequency (Hz)
D011
1 W
50 W
2000
20000
Frequency (%)
D014
1 W
50 W
2000
20000
Frequency (Hz)
D017
Copyright © 2017, Texas Instruments Incorporated
10
1
0.1
0.01
0.001
0.01
0.1
1
Power (W)
Figure 11. AIB Input: THD+N vs Power
10
1
0.1
0.01
0.001
0.01
0.1
1
Power (W)
Figure 13. Molex Input: THD+N vs Power
10
1
0.1
0.01
0.001
0.01
0.1
1
Power (W)
Figure 15. RCA Input: THD+N vs Power
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10
100 200
D002
D002
10
100 200
D005
10
100 200
D008
SLAU751 – November 2017
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