Using TPA3255EVM in Different Output Configurations
10
SLOU441 – July 2016
Copyright © 2016, Texas Instruments Incorporated
TPA3255EVM
•
Connect
right
(stereo) channel input to female RCA jack input D (
BLACK
) for OUTD speaker.
•
For
single-ended subwoofer (mono) input
, connect RCA male jack to female RCA jack input A/AB
(
RED
) and set
J4
jumper positions to SE.
•
For
differential subwoofer (mono) inputs
, connect positive RCA male jack to female RCA jack input
A/AB (
RED
) and connect negative RCA male jack to female RCA jack input B (
YELLOW
) and set
J4
jumper positions to DIFF.
NOTE:
OUTC
and
OUTD
are the single-ended output channels and
OUTA
and
OUTB
are the BTL
channel for 2.1 operations.
4.2
PBTL (0.1) Output Operation
Configure the EVM as follows for PBTL operations:
Table 6. PBTL 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 – PBTL
J6
1 to 2
M2 – PBTL
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
2 to 3
PBTL SELECT INC – GND
J8
2 to 3
PBTL SELECT IND – GND
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
J6
to H and
J5
to L.
•
Connect speaker/power resistor (2–4
Ω
) positive terminal to OUTA and OUTC (OUT A and C shorted).
•
Connect speaker/power resistor (2–4
Ω
) negative terminal to OUTB and OUTD (OUT B and D
shorted).
•
Install PBTL jumpers
J7
and
J8
(pulls input C and input D to GND).
•
For
single-ended mono input
, connect RCA male jack to female RCA jack input A/AB (
RED
) and set
J4
jumper positions to SE.
•
For
differential mono inputs
, connect positive RCA male jack to female RCA jack input A/AB (
RED
)
and connect negative RCA male jack to female RCA jack input B (
YELLOW
) and set
J4
jumper
position to DIFF.
NOTE:
INA
and
INB
are the inputs for PBTL and
INC
and
IND
are grounded for PBTL operation.
