Setup By Mode
7
SLAU751 – November 2017
Copyright © 2017, Texas Instruments Incorporated
TPA3251 Evaluation Module
2.3.1
Connections and Board Configuration
1. Set J6 to H and J5 to L.
2. Connect the positive side of the load to
OUTA (
J9-
RED)
and
OUTC (
J2-
RED)
terminals (OUTA and
OUTC shorted).
3. Connect the negative side of the load to
OUTB (
J9-
BLACK)
and
OUTD (
J2-
BLACK)
terminals (OUTB
and OUTD shorted).
4. Install PBTL jumpers J7 and J8 (pulls input C and input D to GND).
5. Input configuration:
a. SE inputs: Connect the RCA male jack to the female RCA jack input A/AB
(
J3-
RED)
and set the J4
jumper positions to SE. Set J26, J27, J34, and J35 to RCA.
b. Differential inputs: 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)
. Set
the
J4
jumper position to DIFF, and set J26, J27, J34, and J35 to RCA.
c. AIB input: Set J26, J27, J34, and J35 to AIB.
(1)
INA and INB are the inputs for PBTL, and INC and IND are grounded
for PBTL operation.
Table 4. Jumper Configuration (PBTL Mode)
Jumper
Setting
Comment
(1)
J29
IN
PVDD to 15-V BUCK
J32
IN
12-V LDO to 12-V TERM
J33
IN
3.3-V LDO to 3.3-V TERM
J36
IN
12-V LDO to GVDD
J16
3 to 4
MASTER MODE 600kHz
J22
IN
OUTA CAP SHUNT
J23
IN
OUTB CAP SHUNT
J24
IN
OUTC CAP SHUNT
J25
IN
OUTD CAP SHUNT
J5
2 to 3
M1 – L
J6
1 to 2
M2 – H
J7
IN
PBTL SELECT INC – GND
J8
IN
PBTL SELECT IND – GND
J4
1 to 2
INA/B SE INPUT
J19
1 to 2
INC/D SE INPUT
J26
1 to 2
INC-SEL RCA
J27
1 to 2
IND-SEL RCA
J34
1 to 2
INA-SEL RCA
J35
1 to 2
INB-SEL RCA
J21
OUT
C_START
2.3.2
Performance Data (PBTL Mode)
All measurements are taken at an audio frequency = 1 kHz, PVDD_X = 36 V, RL = 4
Ω
, fS = 600 kHz,
ROC = 22 k
Ω
, Output filter: L = 7
μ
H, C = 0.68 µF, with AES17 + AUX-0025 measurement filters.
