TPA3255EVM Setup
7
SLOU441 – July 2016
Copyright © 2016, Texas Instruments Incorporated
TPA3255EVM
3.3
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
and
for stereo
BTL
operation:
Table 3. Stereo BTL Default Jumper States
Jumper
Setting
Comment
J29
IN
PVDD to 15-V BUCK
J31
IN
12-V LDO to 12-V TERM
J32
IN
3.3-V LDO to 3.3-V TERM
J33
IN
3.3-V LDO to 3.3-V TERM
J21
IN
CSTART SE
J16
3 to 4
MASTER MODE
J5
2 to 3
M1 – BTL
J6
2 to 3
M2 – BTL
J22
IN
OUTA CAP SHUNT
J23
IN
OUTB CAP SHUNT
J24
IN
OUTC CAP SHUNT
J25
IN
OUTD CAP SHUNT
J26
2 to 3
INC SELECT
J27
2 to 3
IND SELECT
J7
OUT
PBTL SELECT INC
J8
OUT
PBTL SELECT IND
J10
OUT
INC/D DIFF INPUT
J12
OUT
INC/D DIFF INPUT
J4
1 to 2
INA/B SE INPUT
J19
1 to 2
INC/D SE INPUT
•
Set
S1
to the
RESET
position.
•
Set power supply to 51 V (14–53.5-V range) and current to 10 A (5–14-A range). Do not power up until
all connections are completed.
•
Connect power supply to TPA3255 EVM positive terminal to PVDD (
RED
) and negative terminal to
GND (
BLACK
).
•
Connect
left
channel speaker/power resistor load (4–8
Ω
) to TPA3255 EVM positive output terminal to
OUTA (
RED
) and AP analog input channel A positive terminal.
•
Connect
left
channel speaker/power resistor load (4–8
Ω
) to TPA3255 EVM negative output terminal to
OUTB (
BLACK
) and AP analog input channel A negative terminal.
•
Connect
right
channel speaker/power resistor load (4–8
Ω
) to TPA3255 EVM positive output terminal
to OUTC (
RED
) and AP analog input channel B positive terminal.
•
Connect
right
channel speaker/power resistor load (4–8
Ω
) to TPA3255 EVM negative output terminal
to OUTD (
BLACK
) and AP analog input channel B negative terminal.
•
Be careful not to mix up PVDD, OUTA, 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 A/AB (
RED
) and AP channel B XLR to RCA male jacks to female RCA jacks input C/CD (
WHITE
)
and set
J4
and
J19
jumper positions to SE.
•
For
differential stereo inputs,
connect positive RCA male jacks to female RCA jacks input A/AB
(
RED
) and input C/CD (
WHITE
) and connect negative RCA male jacks to female RCA jacks input B
(
BLUE
) and input D (
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 and12-V LEDs
(
GREEN
) will illuminate.
