SLVU578A December   2011  – September 2021 TPS54428

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Setpoint
    2. 3.2 Output Filter and Closed-Loop Response
  5. 4Test Setup and Results
    1. 4.1  Input/Output Connections
    2. 4.2  Start-Up Procedure
    3. 4.3  Efficiency
    4. 4.4  Load Regulation
    5. 4.5  Line Regulation
    6. 4.6  Frequency
    7. 4.7  Load Transient Response
    8. 4.8  Output Voltage Ripple
    9. 4.9  Input Voltage Ripple
    10. 4.10 Start-Up and Shut-Down
  6. 5Board Layout
    1. 5.1 Layout
  7. 6Schematic, Bill of Materials, and Reference
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
    3. 6.3 Reference
  8. 7Revision History

4.1 Input/Output Connections

Table 4-1 shows the input/output connectors and test points of TPS54428EVM-052. Connect a power supply capable of supplying 2 A to J1 through a pair of 20 AWG wires. Connect the load to J2 through a pair of 20 AWG wires. The maximum load current capability is 4 A. Minimize wire lengths to reduce losses in the wires. Test point TP1 provides a place to monitor the input voltages (VIN) with TP2 providing a convenient ground reference. Use TP8 to monitor the output voltage with TP9 as the ground reference.

Table 4-1 Connection and Test Points
REFERENCE DESIGNATORFUNCTION
J1VIN (See Table 1-1 for VIN range.)
J2VOUT, 1.05 V at 4 A maximum
JP1EN control. Connect EN to OFF to disable, connect EN to ON to enable
TP1VIN test point at VIN connector
TP2GND test point at VIN
TP3EN test point
TP4Loop response measurement test point
TP5VREG5 test point
TP6Switch node test point
TP7Analog ground test point
TP8Output voltage test point
TP9Ground test point at output connector