SLVU491A November   2011  – October 2021 TPS54294

 

  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
      1. 4.3.1 Efficiency of Converter 1
      2. 4.3.2 Efficiency of Converter 2
    4. 4.4 Load Regulation
      1. 4.4.1 Load Regulation of Converter 1
      2. 4.4.2 Load Regulation of Converter 2
    5. 4.5 Line Regulation
      1. 4.5.1 Line Regulation Converter 1
      2. 4.5.2 Line Regulation Converter 2
    6. 4.6 Load Transient Response
      1. 4.6.1 Load Transient Response Converter 1
      2. 4.6.2 Load Transient Response Converter 2
    7. 4.7 Output Voltage Ripple
      1. 4.7.1 Output Voltage Ripple Converter 1
      2. 4.7.2 Output Voltage Ripple Converter 2
    8. 4.8 Input Voltage Ripple
    9. 4.9 Start-Up and Shutdown
      1. 4.9.1 Start-Up and Shutdown Converter 1
      2. 4.9.2 Start-Up and Shutdown Converter 2
  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 TPS54294EVM is provided with input/output connectors and test points as shown in Table 4-1. A power supply capable of supplying 4 A must be connected to J1 through a pair of 20 AWG wires. The loads must be connected to J3 and/or J2 through a pair of 20 AWG wires. The maximum load current capability is 2 times 2 A. Wire lengths must be minimized to reduce losses in the wires. Test point TP1 provides a place to monitor the input voltage (VIN) with TP7 providing a convenient ground reference. TP4 and TP3 are used to monitor the output voltages with TP5 and TP6 as the ground references.

Table 4-1 Connection and Test Points
Reference DesignatorFunction
J1VIN (see Table 1-1 for VIN range)
J2VOUT2, 3.3 V at 2 A maximum
J3VOUT1, 1.2 V at 2 A maximum
J4EN1 control. Connect EN1 to off to disable converter 1; connect EN1 to on to enable converter 1.
J5EN2 control. Connect EN2 to off to disable converter 2; connect EN2 to on to enable converter 2.
JP1Jumper to give the possibility to use another input voltage for converter 2.
TP1VIN test point at VIN connector
TP2VIN2 test point after JP1.
TP3Output voltage test point for converter 2.
TP4Output voltage test point for converter 1.
TP5, TP6, TP7Ground test points at input and output connectors.
TP8EN2 test point.
TP9EN1 test point.
TP10Switch node test point of converter 1.
TP11Switch node test point of converter 2.
TP12VREG5 test point.
TP13PG1 test point.
TP14PG2 test point.
TP15Analog ground test point.