Using TPA3250D2EVM in Different Output Configurations
3
Using TPA3250D2EVM in Different Output Configurations
The TPA3250D2EVM can be configured for four different output operations. The 2.0 BTL configuration is
the default set up of the TPA3250D2EVM described in
. The remaining three configurations are
2.1 BTL plus two single-ended (SE) outputs, 0.1 PBTL output, and 4.0 single-ended (SE) outputs.
Table 3. Mode Selection Pins
Mode Pins
Input Mode
Output Configuration
Description
M2
M1
0
0
2N + 1
2 × BTL
Stereo BTL output configuration
0
1
2N/1N + 1
1 × BTL + 2 × SE
2.1 BTL + SE mode
Paralleled BTL configuration. Connect INPUT_C and INPUT_D to
1
0
2N + 1
1 × PBTL
GND.
1
1
1N + 1
4 × SE
Single-ended output configuration
3.1
BTL Plus Two SE (2.1) Operation
Configure the EVM as follows for 2 SE + 1 BTL operation:
•
Set
J6
to L and
J5
to H.
•
Connect left (stereo) speaker/power resistor load (4–8
Ω
) positive terminal to OUTC and remove
jumper
J24
.
•
Connect right (stereo) speaker/power resistor load (4–8
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 (
YELLOW
) for OUTC speaker.
•
Connect
right
(stereo) channel input to female RCA jack input D/CD (
RED
) for OUTD speaker.
•
For
single-ended subwoofer (mono) input
, connect RCA male jack to female RCA jack input B/AB
(
WHITE
) and set
J4
jumper positions to SE.
•
For
differential subwoofer (mono) inputs
, connect positive RCA male jack to female RCA jack input
B/AB (
WHITE
) and connect negative RCA male jack to female RCA jack input A (
BLACK
) and set
J4
jumper positions to DIFF.
NOTE:
OUTC
and
OUTD
are the single-ended output channels and
OUTA
and
OUTB
are the BTL
channel for 2.1 operations.
3.2
PBTL (0.1) Output Operation
Configure the EVM as follows for PBTL operations:
•
Set
J6
to H and
J5
to L.
•
Connect speaker/power resistor (2–4
Ω
) positive terminal to OUTA and OUTC (OUT A and C shorted).
•
Connect speaker/power resistor (2–4
Ω
) negative terminal to OUTB and OUTD (OUT B and D
shorted).
•
Install PBTL jumpers
J7
and
J8
(pulls input C and input D to GND).
•
For
single-ended mono input
, connect RCA male jack to female RCA jack input B/AB (
WHITE
) and
set
J4
jumper positions to SE.
•
For
differential mono inputs
, connect positive RCA male jack to female RCA jack input B/AB
(
WHITE
) and connect negative RCA male jack to female RCA jack input A (
BLACK
) and set
J4
jumper
position to DIFF.
7
SLVUAM9 – December 2015
TPA3250D2EVM
Copyright © 2015, Texas Instruments Incorporated
