Operation
4
SLOU486 – August 2019
Copyright © 2019, Texas Instruments Incorporated
TPA3139D2 Evaluation Module
2.5
Inputs and Outputs
Use the following connection instructions for BTL or PBTL configuration:
1. For a BTL configuration, connect loads across the outputs (OUTL+ and OUTL–) and (OUTR+ and
OUTR–).
2. For a 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. Apply a single input, differential or single-
ended, to the RIN RCA phono plug and tie LINP and LINN directly to Ground (without capacitors).
2.6
Power Up
Complete the following steps to power up the EVM board:
1. Select the desired gain and mode of operation through J13 (OUT = 26 dB, IN = 20 dB) and J14 (OUT
= Low Idle Current, IN = BD).
2. Configure the input mode using J6 and J10 (OUT = differential input mode, IN = single-ended input
mode).
3. Verify the correct voltage and input polarity and set the external power supplies to ON. The EVM
should begin operation.
4. Adjust the audio source for the correct volume.
2.7
Recommended Setting
and
list recommended settings for conditions with BTL (stereo output) and PBTL (mono
output), respectively.
•
Single-ended input, auto-recover, BTL (stereo output) (see
•
Single-ended input, auto-recover, PBTL (mono output) (see
Table 3. TPA3139D2EVM Setting 1
Setting
Description
J4 (LIN)
L channel audio input
J9 (RIN)
R channel audio input
J6, set to IN
Single-ended input
J10, set to IN
Single-ended input
J7, set to IN
Able to change PLIMIT value with R6
R6
Change PLIMIT voltage value (setting R6 = 0
Ω
disables the PLIMIT
function)
J12, J15 set to OUT
BTL mode
J14 (MODE SEL), set to
OUT
Low idle current mode
Table 4. TPA3139D2EVM Setting 2
Setting
Description
J4 (LIN)
L-channel audio input
J9 (RIN)
R-channel audio input
J6, set to IN
Single-ended input
J10, set to IN
Single-ended input
J7, set to IN
Able to change PLIMIT value with R6
R6
Change PLIMIT voltage value (setting R6 = 0
Ω
disables the PLIMIT
function)
J12, J15 set to IN
PBTL mode
J14 (MODE SEL), set to
OUT
Low idle current mode
