SLOU441 July   2016 TPA3255

 

  1.   TPA3255EVM
    1.     Trademarks
    2. 1 Hardware Overview
      1. 1.1 TPA3255EVM Features
      2. 1.2 TPA3255EVM Frequency Adjust
      3. 1.3 TPA3255EVM Single-Ended and Differential Input
      4. 1.4 TPA3255EVM Clip Overtemperature and Fault Indicators
    3. 2 TPA3255EVM Setup
      1. 2.1 TPA3255EVM Setup
      2. 2.2 Hardware Requirements
      3. 2.3 Hardware Default Setup BTL (2.0)
    4. 3 Using TPA3255EVM in Different Output Configurations
      1. 3.1 BTL Plus Two SE (2.1) Operation
      2. 3.2 PBTL (0.1) Output Operation
      3. 3.3 Single-Ended (SE) Output (4.0) Operation
    5. 4 Board Layouts, Bill of Materials, and Schematic
      1. 4.1 TPA3255EVM Board Layouts
      2. 4.2 TPA3255EVM Board Dimension
      3. 4.3 Bill of Materials
      4. 4.4 TPA3255EVM Schematics

3.1 BTL Plus Two SE (2.1) Operation

Configure the EVM as follows for 2 SE + 1 BTL operation:

Table 5. 2 SE + 1 BTL Default Jumper States

Jumper Setting Comment
J29 IN PVDD to 15-V BUCK
J31 IN 12-V LDO to 12-V TERM
J32 IN 3.3-V LDO to 3.3-V TERM
J33 IN 3.3-V LDO to 3.3-V TERM
J21 IN CSTART SE
J16 3 to 4 MASTER MODE
J5 1 to 2 M1 – 2XSE + BTL
J6 2 to 3 M2 - 2XSE + BTL
J22 IN OUTA CAP SHUNT
J23 IN OUTB CAP SHUNT
J24 OUT OUTC CAP SHUNT
J25 OUT OUTD CAP SHUNT
J26 2 to 3 INC SELECT
J27 2 to 3 IND SELECT
J7 OUT PBTL SELECT INC
J8 OUT PBTL SELECT IND
J10 OUT INC/D DIFF INPUT
J12 OUT INC/D DIFF INPUT
J4 1 to 2 INA/B SE INPUT
J19 1 to 2 INC/D SE INPUT
  • 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.
  • Connect right (stereo) channel input to female RCA jack input D (BLACK) for OUTD speaker.
  • For single-ended subwoofer (mono) input, connect RCA male jack to female RCA jack input A/AB (RED) and set J4 jumper positions to SE.
  • For differential subwoofer (mono) inputs, connect positive RCA male jack to female RCA jack input A/AB (RED) and connect negative RCA male jack to female RCA jack input B (YELLOW) 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.