Texas Instruments TPA3129D2EVM, User Manual, Page: 4 / 14

Operation
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4 SLOU470 – September 2017
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TPA3129D2 Evaluation Module
2.5 Inputs and Outputs
Make the following input and output connections:
1. Connect audio inputs, either differential or single-ended, to the LIN and RIN RCA phono plugs for BTL
operation. To enable the individual channel shutdown feature, tie RINP and RINN directly to GND
(without capacitors) and OUTPL and OUTNL should be working normally in BTL configuration. For
PBTL operation, apply a single input, differential or single-ended, to the RIN RCA phono plug and tie
LINP and LINN directly to GND (without capacitors).
2. For a BTL configuration, connect a load across the outputs (OUTL+ and OUTL–) and (OUTR+ and
OUTR–). For PBTL configuration, connect a single load from one of the left speaker jacks to one of the
right speaker jacks, depending on how the filters are loaded.
2.6 Power Up
When powering up the EVM, use the following steps:
1. Verify the correct voltage and input polarity and turn the external power supplies ON. The EVM should
begin operation.
2. Adjust the audio source for the correct volume.
2.7 Recommended Settings
This section contains the recommended settings for stereo, single-channel, and mono output.
Table 3 lists the settings for a single-ended input with auto recovery, Plimit, and BTL (stereo output).
Table 3. TPA3129D2EVM Setting 1
Setting Description
J6 (RIN) R channel audio input
J9 (LIN) L channel audio input
JP1 (GNDR+) and JP3 (GNDR–), set to OUT R channel on
JP4 (GNDL+) and JP6 (GNDL–), set to OUT L channel on
JP2 (RGND), set to IN Single-ended input (R channel)
JP5 (LGND), set to IN Single-ended input (L channel)
JP7, set to IN Set PLIMIT
R4 Change PLIMIT voltage value
JP8 (SD = FAULT), set to IN Auto-recovery mode
J11 (MODESEL = L) Low idle-loss mode
Table 4 lists the settings for a single-ended input with auto recovery, Plimit, and BTL (single-channel
output).
Table 4. TPA3129D2EVM Setting 2
Setting Description
J6 (RIN) No audio input
J9 (LIN) L channel audio input
JP1 (GNDR+) and JP3 (GNDR–), set to IN R channel off
JP4 (GNDL+) and JP6 (GNDL–), set to OUT L channel on
JP5 (LGND), set to IN Single-ended input (L channel)
JP7, set to IN Set PLIMIT
R4 Change PLIMIT voltage value
JP8 (SD = FAULT), set to IN Auto-recovery mode
J11 (MODESEL = L) Low idle-loss mode