JAJSUD6 April   2024 TPS23881B

PRODUCTION DATA  

1.   1
2. 1 特長
3. 2 アプリケーション
4. 3 概要
5. 4 Device Comparison Table
6. 5 Pin Configuration and Functions
   1. 5.1 Detailed Pin Description
7. 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
8. 7 Parameter Measurement Information
   1. 7.1 Timing Diagrams
9. 8 Detailed Description
   1. 8.1 Overview
      1. 8.1.1 Operating Modes
         1. 8.1.1.1 Auto
         2. 8.1.1.2 Semiauto
         3. 8.1.1.3 Manual and Diagnostic
         4. 8.1.1.4 Power Off
      2. 8.1.2 PoE Compliance Terminology
      3. 8.1.3 Channel versus Port Terminology
      4. 8.1.4 Requested Class versus Assigned Class
      5. 8.1.5 Power Allocation and Power Demotion
      6. 8.1.6 Programmable SRAM
   2. 8.2 Functional Block Diagram
   3. 8.3 Feature Description
      1. 8.3.1 Port Remapping
      2. 8.3.2 Port Power Priority
      3. 8.3.3 Analog-to-Digital Converters (ADC)
      4. 8.3.4 I2C Watchdog
      5. 8.3.5 Current Foldback Protection
   4. 8.4 Device Functional Modes
      1. 8.4.1 Detection
      2. 8.4.2 Connection Check
      3. 8.4.3 Classification
      4. 8.4.4 DC Disconnect
   5. 8.5 I2C Programming
      1. 8.5.1 I2C Serial Interface
   6. 8.6 Register Maps
      1. 8.6.1 Complete Register Set
      2. 8.6.2 Detailed Register Descriptions
         1. 8.6.2.1  INTERRUPT Register
         2. 8.6.2.2  INTERRUPT MASK Register
         3. 8.6.2.3  POWER EVENT Register
         4. 8.6.2.4  DETECTION EVENT Register
         5. 8.6.2.5  FAULT EVENT Register
         6. 8.6.2.6  START/ILIM EVENT Register
         7. 8.6.2.7  SUPPLY and FAULT EVENT Register
            1. 8.6.2.7.1 Detected SRAM Faults and "Safe Mode"
         8. 8.6.2.8  CHANNEL 1 DISCOVERY Register
         9. 8.6.2.9  CHANNEL 2 DISCOVERY Register
         10. 8.6.2.10 CHANNEL 3 DISCOVERY Register
         11. 8.6.2.11 CHANNEL 4 DISCOVERY Register
         12. 8.6.2.12 POWER STATUS Register
         13. 8.6.2.13 PIN STATUS Register
         14. 8.6.2.14 OPERATING MODE Register
         15. 8.6.2.15 DISCONNECT ENABLE Register
         16. 8.6.2.16 DETECT/CLASS ENABLE Register
         17. 8.6.2.17 Power Priority / 2Pair PCUT Disable Register Name
         18. 8.6.2.18 TIMING CONFIGURATION Register
         19. 8.6.2.19 GENERAL MASK Register
         20. 8.6.2.20 DETECT/CLASS RESTART Register
         21. 8.6.2.21 POWER ENABLE Register
         22. 8.6.2.22 RESET Register
         23. 8.6.2.23 ID Register
         24. 8.6.2.24 Connection Check and Auto Class Status Register
         25. 8.6.2.25 2-Pair Police Ch-1 Configuration Register
         26. 8.6.2.26 2-Pair Police Ch-2 Configuration Register
         27. 8.6.2.27 2-Pair Police Ch-3 Configuration Register
         28. 8.6.2.28 2-Pair Police Ch-4 Configuration Register
         29. 8.6.2.29 Capacitance (Legacy PD) Detection
         30. 8.6.2.30 Power-on Fault Register
         31. 8.6.2.31 PORT RE-MAPPING Register
         32. 8.6.2.32 Channels 1 and 2 Multi Bit Priority Register
         33. 8.6.2.33 Channels 3 and 4 Multi Bit Priority Register
         34. 8.6.2.34 4-Pair Wired and Port Power Allocation Register
         35. 8.6.2.35 4-Pair Police Ch-1 and 2 Configuration Register
         36. 8.6.2.36 4-Pair Police Ch-3 and 4 Configuration Register
         37. 8.6.2.37 TEMPERATURE Register
         38. 8.6.2.38 4-Pair Fault Configuration Register
         39. 8.6.2.39 INPUT VOLTAGE Register
         40. 8.6.2.40 CHANNEL 1 CURRENT Register
         41. 8.6.2.41 CHANNEL 2 CURRENT Register
         42. 8.6.2.42 CHANNEL 3 CURRENT Register
         43. 8.6.2.43 CHANNEL 4 CURRENT Register
         44. 8.6.2.44 CHANNEL 1 VOLTAGE Register
         45. 8.6.2.45 CHANNEL 2 VOLTAGE Register
         46. 8.6.2.46 CHANNEL 3 VOLTAGE Register
         47. 8.6.2.47 CHANNEL 4 VOLTAGE Register
         48. 8.6.2.48 2x FOLDBACK SELECTION Register
         49. 8.6.2.49 FIRMWARE REVISION Register
         50. 8.6.2.50 I2C WATCHDOG Register
         51. 8.6.2.51 DEVICE ID Register
         52. 8.6.2.52 CHANNEL 1 DETECT RESISTANCE Register
         53. 8.6.2.53 CHANNEL 2 DETECT RESISTANCE Register
         54. 8.6.2.54 CHANNEL 3 DETECT RESISTANCE Register
         55. 8.6.2.55 CHANNEL 4 DETECT RESISTANCE Register
         56. 8.6.2.56 CHANNEL 1 DETECT CAPACITANCE Register
         57. 8.6.2.57 CHANNEL 2 DETECT CAPACITANCE Register
         58. 8.6.2.58 CHANNEL 3 DETECT CAPACITANCE Register
         59. 8.6.2.59 CHANNEL 4 DETECT CAPACITANCE Register
         60. 8.6.2.60 CHANNEL 1 ASSIGNED CLASS Register
         61. 8.6.2.61 CHANNEL 2 ASSIGNED CLASS Register
         62. 8.6.2.62 CHANNEL 3 ASSIGNED CLASS Register
         63. 8.6.2.63 CHANNEL 4 ASSIGNED CLASS Register
         64. 8.6.2.64 AUTO CLASS CONTROL Register
         65. 8.6.2.65 CHANNEL 1 AUTO CLASS POWER Register
         66. 8.6.2.66 CHANNEL 2 AUTO CLASS POWER Register
         67. 8.6.2.67 CHANNEL 3 AUTO CLASS POWER Register
         68. 8.6.2.68 CHANNEL 4 AUTO CLASS POWER Register
         69. 8.6.2.69 ALTERNATIVE FOLDBACK Register
         70. 8.6.2.70 SRAM CONTROL Register
             1. 8.6.2.70.1 SRAM START ADDRESS (LSB) Register
             2. 8.6.2.70.2 SRAM START ADDRESS (MSB) Register
10. 9 Application and Implementation
    1. 9.1 Application Information
       1. 9.1.1 Introduction to PoE
          1. 9.1.1.1 2-Pair Versus 4-Pair Power and the New IEEE802.3bt Standard
    2. 9.2 Typical Application
       1. 9.2.1 Design Requirements
       2. 9.2.2 Detailed Design Procedure
          1. 9.2.2.1 Connections on Unused Channels
          2. 9.2.2.2 Power Pin Bypass Capacitors
          3. 9.2.2.3 Per Port Components
          4. 9.2.2.4 System Level Components (not Shown in the Schematic Diagrams)
       3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
       1. 9.3.1 VDD
       2. 9.3.2 VPWR
    4. 9.4 Layout
       1. 9.4.1 Layout Guidelines
          1. 9.4.1.1 Kelvin Current Sensing Resistors
       2. 9.4.2 Layout Example
          1. 9.4.2.1 Component Placement and Routing Guidelines
             1. 9.4.2.1.1 Power Pin Bypass Capacitors
             2. 9.4.2.1.2 Per-Port Components
11. 10Device and Documentation Support
    1. 10.1 Documentation Support
       1. 10.1.1 Related Documentation
    2. 10.2 ドキュメントの更新通知を受け取る方法
    3. 10.3 サポート・リソース
    4. 10.4 Trademarks
    5. 10.5 静電気放電に関する注意事項
    6. 10.6 用語集
12. 11Revision History
13. 12Mechanical, Packaging, and Orderable Information