Texas Instruments TPA3251, User Manual

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Hardware Configuration
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12 SLAU751 – November 2017
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TPA3251 Evaluation Module
NOTE: The SE input settings on the TPA3251EVM must only be used for channels with output
configuration BTL or PBTL, not SE. For SE output configuration, the user must set either
jumper J4 or J19 (or both) for that channel to the DIFF position so that the input signal INx is
mapped directly to OUTx.
3.5 Input Connectors
The TPA3251EVM supports three different input connectors. J3, J14, J15, and J18 are RCA connectors;
J10 and J12 are Molex connectors; and J28 is the AIB connector with J30 being the AIB alignment
connection.
Table 9 shows the AIB pinout in detail.
Table 9. AIB Connector (J28) Pinout
Pin
No.
Function Description
Audio EVM Input
or Output
1 Amp Out A Speaker-level output from audio class-D EVM (SE or one side of BTL) O
2 Amp Out B Speaker-level output from audio class-D EVM (SE or one side of BTL) O
3 PVDD
PVDD voltage supply from audio Class-D EVM (variable voltage depending
on Class-D EVM use)
O
4 GND Ground reference between audio plug-in module and audio class-D EVM
5 NC
6 NC
7 3.3 V 3.3-V supply from EVM; used for powering audio plug-in module O
8 3.3 V 3.3-V supply from EVM; used for powering audio plug-in module O
9 12 V 12-V supply from EVM; used for powering audio plug-in module O
10 EN and Reset Assert enable and reset control for audio class-D EVM (active low) I
11 Analog IN_A Analog audio input A (analog in EVM), Master I
2
S bus (digital in EVM) I
12 NC
13 Analog IN_B Analog audio input B (analog in EVM), bit clock I
2
S bus (digital in EVM) I
14 CLIP_OTW
Clipping detection, overtemperature warning, or both from audio class-D EVM
(active low)
O
15 Analog IN_C Analog audio input C (analog in EVM), frame clock I
2
S bus (digital in EVM) I
16 FAULT Fault detection from audio Class-D EVM (active low) O
17 Analog IN_D Analog audio Input D (analog in EVM), data in I
2
S bus (digital in EVM) I
18 NC
19 NC
20 NC
21 GND Ground reference between audio plug-in module and audio class-D EVM
22 GND Ground reference between audio plug-in module and audio class-D EVM
23 NC
24 NC
25 NC
26 NC
27 Amp Out C Speaker-level output from audio class-D EVM (SE or one side of BTL) O
28 Amp Out D Speaker-level output from audio class-D EVM (SE or one side of BTL) O