Using TPA3255EVM in Different Output Configurations
11
SLOU441 – July 2016
Copyright © 2016, Texas Instruments Incorporated
TPA3255EVM
4.3
Single-Ended (SE) Output (4.0) Operation
Configure the EVM as follows for 4 single-ended operations:
Table 7. SE 4.0 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
1 to 2
M1 – 4XSE
J6
1 to 2
M2 – 4XSE
J22
OUT
OUTA CAP SHUNT
J23
OUT
OUTB CAP SHUNT
J24
OUT
OUTC CAP SHUNT
J25
OUT
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
2 to 3
INA/B DIFF INPUT
J19
2 to 3
INC/D DIFF INPUT
•
Set
J6
to H and
J5
to H.
•
Connect speaker/power resistor (2–4
Ω
) positive terminal to OUTA and remove jumper
J22
.
•
Connect speaker/power resistor (2–4
Ω
) positive terminal to OUTB and remove jumper
J23
.
•
Connect speaker/power resistor (2–4
Ω
) positive terminal to OUTC and remove jumper
J24
.
•
Connect speaker/power resistor (2–4
Ω
) positive terminal to OUTD and remove jumper
J25
.
•
Set both
J4
and
J19
jumpers position to DIFF.
•
Connect input to female RCA jack input A/AB (
RED
) for OUTA speaker.
•
Connect input to female RCA jack input B (
YELLOW
) for OUTB speaker.
•
Connect input to female RCA jack input C/CD (
WHITE
) for OUTC speaker.
•
Connect input to female RCA jack input D (
BLACK
) for OUTD speaker.
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NOTE:
The performance of the TPA3255EVM/TPA3255DDV is dependent on the power supply.
Design the power supply with margins that can deliver the needed power. In low-frequency
applications additional bulk capacitance may be needed. Replacing the bulk capacitors on
the TPA3255EVM with more capacitance may be necessary, depending on the power supply
used.
