Quick Start (Btl Mode) - Texas Instruments TPA3251 User Manual

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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
Figure 2 and Figure 3
Figure 2. EVM Board (Top 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).
SLAU751 – November 2017
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show both sides of the EVM board.
Copyright © 2017, Texas Instruments Incorporated
Quick Start (BTL Mode)
Figure 3. EVM Board (Bottom Side)
TPA3251 Evaluation Module
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