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

3.3 Single-Ended (SE) Output (4.0) Operation

Configure the EVM as follows for 4 single-ended operations:

Table 7. SE 4.0 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 – 4XSE
J6 1 to 2 M2 – 4XSE
J22 OUT OUTA CAP SHUNT
J23 OUT 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 2 to 3 INA/B DIFF INPUT
J19 2 to 3 INC/D DIFF INPUT
  • Set J6 to H and J5 to H.
  • Connect speaker/power resistor (2–4 Ω) positive terminal to OUTA and remove jumper J22.
  • Connect speaker/power resistor (2–4 Ω) positive terminal to OUTB and remove jumper J23.
  • Connect speaker/power resistor (2–4 Ω) positive terminal to OUTC and remove jumper J24.
  • Connect speaker/power resistor (2–4 Ω) positive terminal to OUTD and remove jumper J25.
  • Set both J4 and J19 jumpers position to DIFF.
  • Connect input to female RCA jack input A/AB (RED) for OUTA speaker.
  • Connect input to female RCA jack input B (YELLOW) for OUTB speaker.
  • Connect input to female RCA jack input C/CD (WHITE) for OUTC speaker.
  • Connect input to female RCA jack input D (BLACK) for OUTD speaker.

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NOTE

The performance of the TPA3255EVM/TPA3255DDV is dependent on the power supply. Design the power supply with margins that can deliver the needed power. In low-frequency applications additional bulk capacitance may be needed. Replacing the bulk capacitors on the TPA3255EVM with more capacitance may be necessary, depending on the power supply used.