SLUSCD1C June   2017  – November 2018 TPS2373

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  APD Auxiliary Power Detect
      2. 7.3.2  PG Power Good (Converter Enable) Pin Interface
      3. 7.3.3  CLSA and CLSB Classification
      4. 7.3.4  DEN Detection and Enable
      5. 7.3.5  Internal Pass MOSFET
      6. 7.3.6  TPH, TPL and BT PSE Type Indicators
      7. 7.3.7  VC_IN, VC_OUT, UVLO_SEL, and Advanced PWM Startup
      8. 7.3.8  AMPS_CTL, MPS_DUTY and Automatic MPS
      9. 7.3.9  VDD Supply Voltage
      10. 7.3.10 VSS
      11. 7.3.11 Exposed Thermal PAD
    4. 7.4 Device Functional Modes
      1. 7.4.1  PoE Overview
      2. 7.4.2  Threshold Voltages
      3. 7.4.3  PoE Startup Sequence
      4. 7.4.4  Detection
      5. 7.4.5  Hardware Classification
      6. 7.4.6  Inrush and Startup
      7. 7.4.7  Maintain Power Signature
      8. 7.4.8  Advanced Startup and Converter Operation
      9. 7.4.9  PD Hotswap Operation
      10. 7.4.10 Startup and Power Management, PG and TPH, TPL, BT
      11. 7.4.11 Adapter ORing
      12. 7.4.12 Using DEN to Disable PoE
      13. 7.4.13 ORing Challenges
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Requirements
        1. 8.2.2.1  Input Bridges and Schottky Diodes
        2. 8.2.2.2  Protection, D1
        3. 8.2.2.3  Capacitor, C1
        4. 8.2.2.4  Detection Resistor, RDEN
        5. 8.2.2.5  Classification Resistors, RCLSA and RCLSB
        6. 8.2.2.6  APD Pin Divider Network RAPD1, RAPD2
        7. 8.2.2.7  Opto-isolators for TPH, TPL and BT
        8. 8.2.2.8  VC Input and Output, CVCIN and CVCOUT
        9. 8.2.2.9  UVLO Select, UVLO_SEL
        10. 8.2.2.10 Automatic MPS and MPS Duty Cycle, RMPS and RMPS_DUTY
        11. 8.2.2.11 Internal Voltage Reference, RREF
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 EMI Containment
    4. 10.4 Thermal Considerations and OTSD
    5. 10.5 ESD
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

4 Revision History

Changes from B Revision (March 2018) to C Revision

Changes from A Revision (October 2017) to B Revision

  • Changed TPS2373-3 typical current limit to 1.85 AGo
  • Deleted the VAPD typical value Go
  • Changed minimum, typical, and maximum values of VAPD rising thresholdGo
  • Added minimum and maximum values of VAPDH in the Electrical Characteristics tableGo
  • Changed current limit nominal value to 1.85 and maximum value to 2.2Go
  • Changed minimum value of inrush termination to 65%Go
  • Changed typical shutdown temperature to 158°CGo
  • Added TPS2373-4 to the title of Figure 11Go
  • Changed Functional Block Diagram imageGo
  • Changed "current limit is changed to 1.8 A" to "current limit is changed to 1.85 A" in Internal Pass MOSFET subsectionGo
  • Added "The VC switch ..." sentence to VC_IN, VC_OUT, UVLO_SEL, and Advanced PWM Setup subsectionGo
  • Changed "~" to "approximately" and "1.8 A" to "1.85 A" in the Advanced Startup and Converter Operation subsectionGo
  • Added reference for guidance on how to handle PoE shutdown conditions to the Advanced Startup and Converter Operation subsectionGo
  • Changed Typical Application CircuitGo
  • Changed "KΩ" to "kΩ" and "1.65 V" to "1.75 V" in Equation 2Go
  • Changed "232 kΩ" to "221 kΩ" in Equation 3Go
  • Added sentence to end of the APD Pin Divider Network RAPD1, RAPD2 subsectionGo
  • Added information to end of the VC Input and Output, CVCIN and CVCOUT subsectionGo
  • Changed equation 7 values in Automatic MPS and MPS Duty Cycle, RMPS and RMPS_DUTYGo
  • Changed TPS2373-3 to ACTIVEGo

Changes from * Revision (June 2017) to A Revision

  • Changed Automatic MPS falling current threshold MIN from 21.5 to 18, MAX from 34.5 to 38 Go