Using TPA3251D2EVM in Different Output Configurations
3.2
PBTL (0.1) Output Operation
Configure the EVM as follows for PBTL operations:
•
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.
3.3
Single-Ended (SE) Output (4.0) Operation
Configure the EVM as follows for 4 single-ended operations:
•
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 TPA3251D2EVM/TPA3251D2DDV 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 TPA3251D2EVM with 3300 µF or more capacitance may be necessary,
depending on the power supply used.
8
TPA3251D2EVM
SLVUAG8A – September 2015 – Revised October 2015
Copyright © 2015, Texas Instruments Incorporated