SLVUBO2B April   2019  – December 2020 TPS23758

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Electrical Specifications
  4. 3Description
  5. 4Schematic
  6. 5General Configuration and Description
    1. 5.1 Physical Access
  7. 6TPS23758EVM-080 Performance Data
    1. 6.1 Startup to PSE and DCDC Startup
    2. 6.2 Transient Response
    3. 6.3 Efficiency
    4. 6.4 Load Regulation
    5. 6.5 Recovery from VOUT Short
    6. 6.6 Slew Rate Adjust
  8. 7EVM Assembly Drawings and Layout Guidelines
    1. 7.1 PCB Drawings
    2. 7.2 Layout Guidelines
    3. 7.3 EMI Containment
  9. 8Bill of Materials
  10. 9Revision History

5.1 Physical Access

Table 5-1 lists the EVM connector functionality. Table 5-2 describes the test point availability and jumper functionality.

Table 5-1 Connector Functionality
ConnectorLabelDescription
J1PWR+DATAPoE input; connect to PSE power and data source.
J2DATAEthernet data passthrough; connect to downstream Ethernet device.
J3OutputOutput connector to load.
J4Adapter InputDC-to-DC converter input bypassing the PoE converter; connect a 12-V adapter.
J5LEDJump J4 to visually indicate the output voltage.
J6FREQJump to 'Fixed' for fixed frequency. Jump to 'Dither' to enable spread spectrum dithering.
Table 5-2 Test Points
Test PointLabelDescription
TP1BSBob Smith termination
TP2VREGBias winding
TP3VCCSwitching supply voltage
TP4VPDInput voltage
TP5VOUTOutput voltage
TP6, TP10PGNDPrimary ground
TP7GNDSecondary ground
TP8VDDDC-DC converter input
TP9RSNSCurrent sense voltage
TP11SSTSoft start and hiccup timer
TP12VSSPoE input return ground
TP13FBFeedback loop