Quick Start (BTL Mode)
3
SLAU751 – November 2017
Copyright © 2017, Texas Instruments Incorporated
TPA3251 Evaluation Module
1
Quick Start (BTL Mode)
This section describes the necessary hardware, connections, configuration, and steps to quick start the
EVM into bridge-tied load (BTL) mode with stereo audio playing out of two speakers.
1.1
Required Hardware
The EVM requires the following hardware:
•
TPA3251EVM (AMPS030-001) power supply 18-V to 36-V DC, 15 A
•
Two 2-
Ω
to 8-
Ω
, 100-W speakers or resistor loads
•
Four speaker or banana cables
•
RCA input cables
•
Analog output audio source
1.2
Connections and Board Configuration
and
show both sides of the EVM board.
Figure 2. EVM Board (Top Side)
Figure 3. EVM Board (Bottom Side)
The steps for making the connections are as follows:
1. Set S1 to the
RESET
position.
2. Set the power supply to 36 V (18-V to 38-V range) and current to 10 A (5-A to 14-A range).
3. Connect the power supply to the TPA3251EVM positive terminal to PVDD
(
J1-
RED)
and negative
terminal to GND
(
J1-
BLACK)
.
4. Connect the positive side of the
left
channel load to the TPA3251EVM
OUTA (
J9-
RED)
terminal.
5. Connect the negative side of the
left
channel load to the TPA3251EVM
OUTB (
J9-
BLACK)
terminal.
6. Connect the positive side of the
right
channel load to the TPA3251EVM
OUTC (
J2-
RED)
terminal.
7. Connect the negative side of the
right
channel load to the TPA3251EVM
OUTD (
J2-
BLACK)
terminal.
8. Be careful not to mix up PVDD,
OUTA,
and
OUTC
because the colors are the same
(RED)
.
9. Input configuration:
a. Single-ended (SE) inputs: Set J4 and J19 to SE and set J26, J27, J34, and J35 to RCA.
a. Connect the RCA male jack to the female RCA jack input A/AB
(
J3-
RED)
.
b. Connect the RCA male jack to the female RCA jack input C/CD
(
J18-
WHITE)
.
b. Differential inputs: Set J4 and J19 to DIFF and set J26, J27, J34, and J35 to RCA
a. Connect the positive RCA male jack to the female RCA jack input A/AB
(
J3-
RED)
and connect
the negative RCA male jack to the female RCA jack input B
(
J14-
BLACK)
.
