TPA3250D2EVM Setup
2.3
Hardware Default Setup BTL (2.0)
BTL (2.0) default hardware setup is as follows:
•
Remove the EVM from the ESD bag.
•
Check that jumpers are in their default state as shown in
for stereo
BTL
operation:
–
J4 and J19
pin 1-pin 2 position
(SE Input)
–
J5 and J6
pin 2-pin 3 position
(2 BTL Output)
–
J7, J8, J17, and J21
out
–
J16
pin 3-pin 4 position
(Master Mode)
–
J22, J23, J24 and J25
in
(BTL Outputs)
•
Set
S1
to the
RESET
position.
•
Set power supply to 36 V (18- to 38-V range) and current to 10 A (5- to 14-A range). Do not power up
until all connections are completed.
•
Connect power supply to TPA3250D2 EVM positive terminal to PVDD (
RED
) and negative terminal to
GND (
BLACK
).
•
Connect
left
channel speaker/power resistor load (4–8
Ω
) to TPA3250D2 EVM positive output terminal
to OUTA (
BLACK
) and AP analog input channel A positive terminal.
•
Connect
left
channel speaker/power resistor load (4–8
Ω
) to TPA3250D2 EVM negative output
terminal to OUTB (
RED
) and AP analog input channel A negative terminal.
•
Connect
right
channel speaker/power resistor load (4–8
Ω
) to TPA3250D2 EVM positive output
terminal to OUTC (
BLACK
) and AP analog input channel B positive terminal.
•
Connect
right
channel speaker/power resistor load (4–8
Ω
) to TPA3250D2 EVM negative output
terminal to OUTD (
RED
) and AP analog input channel B negative terminal.
•
Be careful not to mix up PVDD and OUTD and OUTB terminals, since the colors are the same (
RED
).
•
For
single-ended stereo inputs
, connect AP channel A XLR to RCA male jacks to female RCA jacks
input D/CD (
RED
) and AP channel B XLR to RCA male jacks to female RCA jacks input B/AB (
WHITE
)
and set
J4
and
J19
jumper positions to SE.
•
For
differential stereo inputs,
connect positive RCA male jacks to female RCA jacks input D/CD
(
RED
) and input B/AB (
WHITE
) and connect negative RCA male jacks to female RCA jacks input C
(
YELLOW
) and input A (
BLACK
) and set
J4
and
J19
jumper positions to DIFF.
•
Power up power supply once all the connections are made correctly and the 3.3-V LED (
GREEN
) will
illuminate.
•
Set
S1
to the
NORMAL
position.
•
CLIP_OTWz (
ORANGE
) and FAULTz (
RED
) LEDs should be off, if the audio source is off.
NOTE:
J3/J10
and
J18/J15
can be used for differential inputs to INA/INB and INC/IND, respectively.
Using a smart phone/tablet/PC with headphone to RCA cable, audio streaming via headphone jack can
begin once the EVM is powered up correctly with jumpers in their default state. Start the media player of
your choice and enjoy the enhanced audio performance TPA3250D2 provides as a quick check of the
setup.
6
TPA3250D2EVM
SLVUAM9 – December 2015
Copyright © 2015, Texas Instruments Incorporated
