Texas Instruments TPA3251, User Manual

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Frequency (Hz)
THD
+N
(%)
0.0001
0.001
0.01
0.1
1
10
20 200 2000 20000
D013
1 W
20 W
75 W
Power (W)
THD
+N
(%)
0.01 0.1 1 10 100 200
0.001
0.01
0.1
1
10
D004
Frequency (Hz)
THD
+N
(%)
0.0001
0.001
0.01
0.1
1
10
20 200 2000 20000
D010 D010
1 W
20 W
75 W
Power (W)
THD
+N
(%)
0.01 0.1 1 10 100 200
0.001
0.01
0.1
1
10
D001
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Setup By Mode
5 SLAU751 – November 2017
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Copyright © 2017, Texas Instruments Incorporated
TPA3251 Evaluation Module
2 Setup By Mode
The user can configure the TPA3251EVM for four different output operations. The 2.0 BTL configuration is
the default set up of the TPA3251EVM as described in
Section 1.2 . The remaining three configurations
are 2.1 BTL plus two SE outputs, 0.1 PBTL output, and 4.0 SE outputs.
Table 2. Mode Selection Pins
Mode Pins
Input Mode Output Configuration Description
M2 M1
0 0 2N + 1 2 x BTL Stereo BTL output configuration
0 1 2N-1N + 1 1 x BTL + 2 × SE 2.1 BTL + SE mode
1 0 2N + 1 1 × PBTL Parallel BTL configuration; connect INPUT_C
2.1 BTL Mode (Two-Speaker Output)
This mode is the same as described in Section 1 .
2.1.1 Performance Data (BTL Mode)
All measurements are taken at an audio frequency = 1 kHz, PVDD_X = 36 V, RL = 4
Ω
, fS = 600 kHz,
ROC = 22 k Ω , Output filter: L = 7 μ H, C = 0.68 µF, with AES17 + AUX-0025 measurement filters.
Figure 4. AIB Input: THD+N vs Frequency Figure 5. AIB Input: THD+N vs Power
Figure 6. Molex™ Input: THD+N vs Frequency Figure 7. Molex Input: THD+N vs Power