Setup By Mode; Molex™ Input: Thd+N Vs Frequency; Molex Input: Thd+N Vs Power; Aib Input: Thd+N Vs Frequency - Texas Instruments TPA3251 User Manual

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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
are 2.1 BTL plus two SE outputs, 0.1 PBTL output, and 4.0 SE outputs.
Mode Pins
M2 M1
0 0
0 1
1 0
2.1 BTL Mode (Two-Speaker Output)
This mode is the same as described in
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 kΩ, Output filter: L = 7 μH, C = 0.68 µF, with AES17 + AUX-0025 measurement filters.
10
1
0.1
0.01
0.001
0.0001
20 200
Figure 4. AIB Input: THD+N vs Frequency
10
1
0.1
0.01
0.001
0.0001
20 200
Figure 6. Molex™ Input: THD+N vs Frequency
SLAU751 – November 2017
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Table 2. Mode Selection Pins
Input Mode Output Configuration
2N + 1 2 x BTL
2N-1N + 1 1 x BTL + 2 × SE
2N + 1 1 × PBTL
Section
1 W
20 W
75 W
2000 20000
Frequency (Hz)
D010 D010
1 W
20 W
75 W
2000 20000
Frequency (Hz)
D013
Copyright © 2017, Texas Instruments Incorporated
Section 1.2. The remaining three configurations
Description
Stereo BTL output configuration
2.1 BTL + SE mode
Parallel BTL configuration; connect INPUT_C
1.
10
1
0.1
0.01
0.001
0.01 0.1
Figure 5. AIB Input: THD+N vs Power
10
1
0.1
0.01
0.001
0.01 0.1
Figure 7. Molex Input: THD+N vs Power
Setup By Mode
1 10 100 200
Power (W)
D001
1 10 100 200
Power (W)
D004
TPA3251 Evaluation Module
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