Advertisement
www.ti.com
4
Using TPA3255EVM in Different Output Configurations
The TPA3255EVM can be configured for four different output operations. The 2.0 BTL configuration is the
default set up of the TPA3255EVM described in
BTL plus two single-ended (SE) outputs, 0.1 PBTL output, and 4.0 single-ended (SE) outputs.
Mode Pins
Input Mode
M2
M1
0
0
2N + 1
0
1
2N/1N + 1
1
0
2N + 1
1
1
1N + 1
4.1
BTL Plus Two SE (2.1) Operation
Configure the EVM as follows for 2 SE + 1 BTL operation:
Jumper
J29
J31
J32
J33
J21
J16
J5
J6
J22
J23
J24
J25
J26
J27
J7
J8
J10
J12
J4
J19
•
Set J6 to L and J5 to H.
•
Connect left (stereo) speaker/power resistor load (2–4 Ω) positive terminal to OUTC and remove
jumper J24.
•
Connect right (stereo) speaker/power resistor load (2–4 Ω) positive terminal to OUTD and remove
jumper J25.
•
Connect subwoofer (mono) speaker/power resistor load (4–8 Ω) positive terminal to OUTA and
negative terminal to OUTB.
•
Set J19 jumper position to DIFF.
•
Connect left (stereo) channel input to female RCA jack input C/CD (WHITE) for OUTC speaker.
SLOU441 – July 2016
Submit Documentation Feedback
Section
Table 4. Mode Selection Pins
Output Configuration Description
2 × BTL
Stereo BTL output configuration
1 × BTL + 2 × SE
2.1 BTL + SE mode
Paralleled BTL configuration. Connect INPUT_C and INPUT_D to
1 × PBTL
GND.
4 × SE
Single-ended output configuration
Table 5. 2 SE + 1 BTL Default Jumper States
Setting
IN
IN
IN
IN
IN
3 to 4
1 to 2
2 to 3
IN
IN
OUT
OUT
2 to 3
2 to 3
OUT
OUT
OUT
OUT
1 to 2
1 to 2
Copyright © 2016, Texas Instruments Incorporated
Using TPA3255EVM in Different Output Configurations
3.3. The remaining three configurations are 2.1
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 – 2XSE + BTL
M2 - 2XSE + 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
9
TPA3255EVM
Advertisement
