ZHCS791C March   2012  – July 2015 TPS2378

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and 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  CDB Converter Disable Bar Pin Interface
      3. 7.3.3  CLS Classification
      4. 7.3.4  DEN Detection and Enable
      5. 7.3.5  Internal Pass MOSFET
      6. 7.3.6  T2P Type-2 PSE Indicator
      7. 7.3.7  VDD Supply Voltage
      8. 7.3.8  VSS
      9. 7.3.9  PowerPAD
      10. 7.3.10 Forced, Four-Pair, High Power PoE
    4. 7.4 Device Functional Modes
      1. 7.4.1  PoE Overview
      2. 7.4.2  Threshold Voltages
      3. 7.4.3  PoE Start-up Sequence
      4. 7.4.4  Detection
      5. 7.4.5  Hardware Classification
      6. 7.4.6  Inrush and Start-up
      7. 7.4.7  Maintain Power Signature
      8. 7.4.8  Start-up and Converter Operation
      9. 7.4.9  PD Hotswap Operation
      10. 7.4.10 Start-up and Power Management, CDB and T2P
      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 Resistor, RCLS
        6. 8.2.2.6 APD Pin Divider Network RAPD1, RAPD2
      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. 11器件和文档支持
    1. 11.1 文档支持
      1. 11.1.1 相关文档　
    2. 11.2 社区资源
    3. 11.3 商标
    4. 11.4 静电放电警告
    5. 11.5 Glossary
  12. 12机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

4 修订历史记录

Changes from B Revision (November 2012) to C Revision

  • Added ESD 额定值表，特性 描述 部分，器件功能模式，应用和实施部分，电源相关建议部分，布局部分，器件和文档支持部分以及机械、封装和可订购信息部分Go
  • Deleted Detailed Pin Description section. Go
  • Deleted CBD Pin Interface sectionGo
  • Deleted APD Pin Divider Network, RAPD1, RAPD2 sectionGo

Changes from A Revision (March 2012) to B Revision

  • 已增加应用：强制型、四对、高功率设备 (SLVA625)Go
  • Added Note 1 to the ELECTRICAL CHARACTERISTICS tableGo
  • Added section: Forced, Four-Pair, High Power PoE Go
  • Changed Table 2, From: POWER ≤ 12.95W To: POWER ≤ 13W, From: POWER > 12.95W To POWER > 13W, and PD INPUT POWER (max) From: 12.95 W To 13W Go
  • Changed Table 2, PSE Output Power for 802.3at (Type 2) From: 36W to 30WGo
  • Changed text in the Detection section From: "( ΔV / ΔI ) between 23.75 kΩ and 26.25 kΩ at the PI." To: "( ΔV / ΔI ) between 23.7 kΩ and 26.3 kΩ at the PI." Go
  • Added text to the Startup and Converter Operation section: "Additional loading applied between VVDD and VRTN during the inrush state may prevent successful PD and subsequent converter start up."Go
  • Changed text in the Detection Resistor, RDEN section From: "RDEN between 23.75 kΩ and 26.25 kΩ, or 25 kΩ ± 5%. " To: "RDEN between 23.7 kΩ and 26.3 kΩ, or 25 kΩ ± 5%."Go

Changes from * Revision (March 2012) to A Revision

  • Changed the Inrush termination MAX value From: 100% To: 99%Go
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