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3.3
Hardware Default Setup BTL (2.0)
BTL (2.0) default hardware setup is as follows:
•
Remove the EVM from the ESD bag.
•
Check that jumpers are in their default state as shown in
operation:
Jumper
J29
J31
J32
J33
J21
J16
J5
J6
J22
J23
J24
J25
J26
J27
J7
J8
J10
J12
J4
J19
•
Set S1 to the RESET position.
•
Set power supply to 51 V (14–53.5-V range) and current to 10 A (5–14-A range). Do not power up until
all connections are completed.
•
Connect power supply to TPA3255 EVM positive terminal to PVDD (RED) and negative terminal to
GND (BLACK).
•
Connect left channel speaker/power resistor load (4–8 Ω) to TPA3255 EVM positive output terminal to
OUTA (RED) and AP analog input channel A positive terminal.
•
Connect left channel speaker/power resistor load (4–8 Ω) to TPA3255 EVM negative output terminal to
OUTB (BLACK) and AP analog input channel A negative terminal.
•
Connect right channel speaker/power resistor load (4–8 Ω) to TPA3255 EVM positive output terminal
to OUTC (RED) and AP analog input channel B positive terminal.
•
Connect right channel speaker/power resistor load (4–8 Ω) to TPA3255 EVM negative output terminal
to OUTD (BLACK) and AP analog input channel B negative terminal.
•
Be careful not to mix up PVDD, OUTA, and OUTB terminals, since the colors are the same (RED).
•
For single-ended stereo inputs, connect AP channel A XLR to RCA male jacks to female RCA jacks
input A/AB (RED) and AP channel B XLR to RCA male jacks to female RCA jacks input C/CD (WHITE)
and set J4 and J19 jumper positions to SE.
•
For differential stereo inputs, connect positive RCA male jacks to female RCA jacks input A/AB
(RED) and input C/CD (WHITE) and connect negative RCA male jacks to female RCA jacks input B
(BLUE) and input D (BLACK) and set J4 and J19 jumper positions to DIFF.
•
Power up power supply once all the connections are made correctly and the 3.3-V and12-V LEDs
(GREEN) will illuminate.
SLOU441 – July 2016
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Table 3. Stereo BTL Default Jumper States
Setting
IN
IN
IN
IN
IN
3 to 4
2 to 3
2 to 3
IN
IN
IN
IN
2 to 3
2 to 3
OUT
OUT
OUT
OUT
1 to 2
1 to 2
Copyright © 2016, Texas Instruments Incorporated
Figure 1
and
Table 3
for stereo BTL
Comment
PVDD to 15-V BUCK
12-V LDO to 12-V TERM
3.3-V LDO to 3.3-V TERM
3.3-V LDO to 3.3-V TERM
CSTART SE
MASTER MODE
M1 – BTL
M2 – BTL
OUTA CAP SHUNT
OUTB CAP SHUNT
OUTC CAP SHUNT
OUTD CAP SHUNT
INC SELECT
IND SELECT
PBTL SELECT INC
PBTL SELECT IND
INC/D DIFF INPUT
INC/D DIFF INPUT
INA/B SE INPUT
INC/D SE INPUT
TPA3255EVM Setup
7
TPA3255EVM
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