Operation
4
SLOU499 – October 2017
Copyright © 2017, Texas Instruments Incorporated
TPA3156D2EVM User’s Guide
2.5
Inputs and Outputs
Make the following input and output connections:
For BTL configuration:
1. Connect audio inputs, either differential or single-ended, to the LIN and RIN RCA phono plugs. To
enable the individual channel shutdown feature, tie RINP and RINN directly to ground (without
capacitors), and OUTPL and OUTNL should work normally.
2. Connect a load (or loads) across the outputs (OUTL+ and OUTL–) and (OUTR+ and OUTR–).
For PBTL configuration:
1. Apply a single input, differential or single ended, to the RIN RCA phono plug and tie LINP and LINN
directly to Ground (without capacitors).
2. 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
1. Verify 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.
lists the settings for a single-ended input with auto recovery, PLIMIT, and BTL (stereo output).
Table 3. TPA3156D2EVM Setting 1 (Stereo Output)
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 sets IN
Set PLIMIT
R4
Change PLMIT voltage value
JP8 (/SD=/FAULT) set to IN
Auto-recovery mode
J11 (MODESEL=L)
Low idle-loss mode
