Texas Instruments TPA3251, User Manual

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Frequency (Hz)
THD
+N
(%)
0.001
0.01
0.1
1
10
50
20 200 2000 20000
D018
1 W
10 W
30 W
Power (W)
THD
+N
(%)
0.01 0.1 1 10 100
0.001
0.01
0.1
1
10
D009
Frequency (Hz)
THD
+N
(%)
0.001
0.01
0.1
1
10
50
20 200 2000 20000
D015
1 W
10 W
30 W
Power (W)
THD
+N
(%)
0.01 0.1 1 10 100
0.001
0.01
0.1
1
10
D006 D006
Frequency (Hz)
THD
+N
(%)
0.001
0.01
0.1
1
10
50
20 200 2000 20000
D012
1 W
10 W
30 W
Power (W)
THD
+N
(%)
0.01 0.1 1 10 100
0.001
0.01
0.1
1
10
D003
Hardware Configuration
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10 SLAU751 – November 2017
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TPA3251 Evaluation Module
Figure 16. AIB Input: THD+N vs Frequency Figure 17. AIB Input: THD+N vs Power
Figure 18. Molex Input: THD+N vs Frequency Figure 19. Molex Input: THD+N vs Power
Figure 20. RCA Input: THD+N vs Frequency Figure 21. RCA Input THD+N vs Power
3 Hardware Configuration
3.1 Indicator Overview (OTW_CLIP and FAULT)
The TPA3251EVM is equipped with LED indicators that illuminate when the FAULT or CLIP_OTW pin (or
both) goes low. See
Table 6 and TPA3251 175-W Stereo, 350-W Mono PurePath™ Ultra-HD Analog-
Input Class-D Amplifier for more details on which events trigger the pins to go low.
Table 6. Fault and Clip Overtemperature Status
FAULT OTW_CLIP Description
0 0
Overtemperature (OTE), overload (OLP), or undervoltage (UVP) junction temperature higher than
125°C (overtemperature warning)
0 0 OLP or UVP; junction temperature higher than 125°C (overtemperature warning)
0 1 OLP or UVP; junction temperature lower than 125°C
1 0 Junction temperature higher than 125°C (overtemperature warning)
1 1 Junction temperature lower than 125°C and no OLP or UVP faults (normal operation)