SLVUBX0A July   2021  – January 2022 TPSM8A28 , TPSM8A29

 

  1.   Trademarks
  2. 1Introduction
  3. 2Description
  4. 3Getting Started With the TPSM8A29EVM
    1. 3.1 J1 - Input Voltage Supply Connector
    2. 3.2 J4 and J7 - Positive and Negative Output Connectors
    3. 3.3 J2 - Enable Header
    4. 3.4 J5 - Switching Frequency and Operating Mode
    5. 3.5 J6 - Output Voltage Selection Header
  5. 4Test Point Description
    1. 4.1 TP12 - SS/REF_IN
    2. 4.2 TP14 - VCC
  6. 5Test Setup and Results
    1. 5.1 Startup Procedure
    2. 5.2 Efficiency
    3. 5.3 Load Regulation
    4. 5.4 Line Regulation
    5. 5.5 Output Voltage Ripple
    6. 5.6 Startup and Shutdown
    7. 5.7 Load Transient
    8. 5.8 Bode Plot
  7. 6TPSM8A29EVM Schematic
  8. 7TPSM8A29EVM PCB Layers
  9. 8TPSM8A29EVM Bill of Materials
  10. 9Revision History

3.1 J1 - Input Voltage Supply Connector

The connector J1 is used to connect the DC input voltage supply to the EVM. The positive connection of the input supply is connected to J1-1 (J1, pin 1), and the negative connection of the input supply is connected to J1-2. This is indicated by the silkscreen markings on the EVM. This connector is designed to accept a wire size of 14 AWG - 22 AWG. To minimize voltage drops across the input voltage supply cable, wire lengths should be minimized, and a heavier gauge wire should be favored over a lighter gauge. TI recommends using 18 AWG or greater.

For power supplies that support remote sensing, the positive sense point is connected to TP4 (VIN_SNS+), and the negative sense point is connected to TPS (VIN_SNS-).