SLVU452A May   2011  – October 2021 TPS54228

 

  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 Load Transient Response
    7. 4.7 Output Voltage Ripple
    8. 4.8 Input Voltage Ripple
    9. 4.9 Start-Up
  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

The TPS54228EVM-686 is provided with input/output connectors and test points as shown in Table 4-1. A power supply capable of supplying 2 A must be connected to J1 through a pair of 20 AWG wires. The load must be connected to J2 through a pair of 20 AWG wires. The maximum load current capability is 2 A. Wire lengths must be minimized 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. TP8 is used to monitor the output voltage with TP9 as the ground reference.

Table 4-1 Connection and Test Points
Reference Designator Function
J1 VIN (see Table 1-1 for VIN range)
J2 VOUT, 1.05 V at 3 A maximum.
JP1 EN control. Connect EN to OFF to disable, connect EN to ON to enable.
TP1 VIN test point at VIN connector.
TP2 GND test point at VIN.
TP3 EN test point.
TP4 Loop response measurement test point.
TP5 VREG5 test point.
TP6 Switch node test point.
TP7 Analog ground test point.
TP8 Output voltage test point.
TP9 Ground test point at output connector.