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

1.3 TPA3255EVM Single-Ended and Differential Input

The TPA3255EVM supports both differential and single-ended inputs. For single-ended inputs, J4 and/or J19 jumpers are set to the SE position, so that the TPA3255EVM uses the NE5532 to convert the single-ended input signal to differential to properly drive the differential inputs of the TPA3255. The input RCA jack, J3, is used to provide INA inputs and RCA jack J14 is used to provide INB inputs. RCA jack J18 is used to provide INC inputs and RCA jack J15 is used to provide IND inputs with differential inputs.

For differential input operation, J4 and/or J19 jumpers are set to the DIFF position, and the TPA3255EVM uses the NE5532 to buffer the differential input signal to the differential inputs of the TPA3255. The input RCA jack, J3, is used to provide INA, RCA jack J14 provides INB, RCA jack J18 provides INC, and RCA jack J15 provides IND with differential inputs.

NOTE

Single-ended input settings on the TPA3255EVM should only be used for channels with output configuration BTL or PBTL, not SE. For SE output configuration J4 and/or J19 jumpers for that channel must be set to the DIFF position, so the input signal INx is mapped directly to OUTx.