Use the following steps when connecting and configuring the board for BTL MODE:
1. Ensure the power supply is OFF. Connect the power supply positive terminal to J1 PVDD (red) and negative
terminal to J1 GND (black).
2. Connect the left channel speaker, power resistor load (3–8 Ω) to the TPA3223EVM positive output terminal
(J9 OUT1+ (red)) and other side of the speaker, power resistor to the TPA3223EVM negative output terminal
(J9 OUT1– (black)).
3. Connect the right channel speaker, power resistor load (3–8 Ω) to the TPA3223EVM positive output terminal
(J2 OUT2+ (red)) and other side of the speaker, power resistor to the TPA3223EVM negative output terminal
(J2 OUT2– (black)).
4. Check to make sure that the power supply is connected to J1 only and speakers are connected to J9 or J2
only, as their colors are the same.
5. Input Configuration:
a.
Differential Inputs:
connect one differential XLR audio input to each DIFF IN1 (J14) and DIFF IN2
(J15). Install jumpers J10, J11, J20, and J21 to position 1:2 which is labeled as
RCA
or
XLR
. Jumpers
J4 and J12 must be uninstalled for DIFF input.
b.
Single-Ended Inputs:
connect one single-ended RCA audio input to IN1P (J3) and IN2P (J18). Install
jumpers J10, J11, J20, and J21 to position 1:2 which is labeled as
RCA
or
XLR
. Jumpers J4 and J12
must be installed for SE input.
c.
Audio Interface Board Input:
Install jumpers J10, J11, J20, and J21 to position 2:3 which is labeled as
AIB
. Jumpers J4 and J12 must be installed for SE input from the AIB or uninstalled for DIFF input from
the AIB.
6. Ensure that RESET S1 and MUTE S2 are in the lower positions of RESET and MUTE, respectively.
7. Check
for all jumper and switch configurations
Table 1-1. Jumper and Switch Configurations (BTL Mode)
Component
Component Description
Configuration for BTL
J23
Gain/CLKSYNC Select
MSTR (Primary) 20 dB
J24
N/A
IN
J4, J12
Input DIFF/SE Select
OUT = DIFF IN, IN = DIFF IN
J10, J11, J20, J21
AIB Input Select
Position 1:2 for XLR/RCA, Position 2:3
for AIB
J6
HEAD/AD Mode Select
IN
J7, J8
PBTL/BTL Select
OUT
S1
RESET Control
RESET
S2
MUTE Control
MUTE
J13
Auto Retry
OUT
J29
PVDD-IN
IN
J26
12V-IN
IN
J5
5V-IN
IN
J27
3.3V-IN
IN
J17
OSC Output
No Connection
J16
FREQ_ADJ
Position 3:4 MASTER (Primary)
MODE
1.3 Power-Up
Ensure that required connections and configurations have been checked. The TPA3223EVM board can now be
powered on.
1. Enable the power supply at 12 V to 45 V and ensure that LED D5 illuminates. LEDs D2 and D4 must not be
illuminated.
2. Bring the EVM out of RESET state by switching RESET (S1) to NORMAL. You can see the FAULT LED (D4)
blink once quickly, then remain unilluminated.
3. Bring the EVM out of MUTE state by switching MUTE (S2) to NORMAL.
Quick Start (BTL MODE)
SLAU874 – OCTOBER 2022
TPA3223 Evaluation Module
5
Copyright © 2022 Texas Instruments Incorporated