ZHCSH16C November   2017  – August 2019 TPS25820 , TPS25821

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化原理图
  4. 4 修订历史记录
  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 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 USB Type C Basic
      2. 7.1.2 Configuration Channel
      3. 7.1.3 Detecting a Connection
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Configuration Channel Pins CC1 and CC2
      2. 7.3.2 Current Capability Advertisement and VBUS Overload Protection
      3. 7.3.3 FAULT Response
      4. 7.3.4 Thermal Shutdown
      5. 7.3.5 REF
      6. 7.3.6 Plug Polarity Detection
      7. 7.3.7 Sink Attachment Indicator
      8. 7.3.8 Device Enable Control
      9. 7.3.9 Undervoltage Lockout (UVLO)
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Type-C Source Port Implementation without BC 1.2 Support
        1. 8.2.1.1 Design Requirements
          1. 8.2.1.1.1 Input and Output Capacitance Considerations
          2. 8.2.1.1.2 System Level ESD Protection
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Type -C Source Port Implementation with BC 1.2 (DCP Mode) Support
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
      3. 8.2.3 Implementing a USB 3.1 Type-C Charging Port with the TPS25820
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Curves
      4. 8.2.4 Implementing TPS25821 in USB Car Chargers
        1. 8.2.4.1 Design Requirements
        2. 8.2.4.2 Detailed Design Procedure
        3. 8.2.4.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 第三方米6体育平台手机版_好二三四免责声明
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 相关链接
    4. 11.4 接收文档更新通知
    5. 11.5 社区资源
    6. 11.6 商标
    7. 11.7 静电放电警告
    8. 11.8 Glossary
  12. 12机械、封装和可订购信息

7.1.1 USB Type C Basic

For a detailed description of the Type-C spec refer to the USB-IF website to download the latest released version. Some of the basic concepts of the Type-C spec that pertains to understanding the operation of the TPS25820/21 (a Downward Facing Port, DFP device) are described as follows.

USB Type-C removes the need for different plug and receptacle types for host and device functionality. The Type-C receptacle replaces both Type-A and Type-B receptacles since the Type-C cable is plug-able in either direction between host and device. A host-to-device logical relationship is maintained via the configuration channel (CC). Optionally hosts and devices can be either providers or consumers of power when USB PD communication is used to swap roles.

All USB Type-C ports operate in one of below three data modes:

  • Host mode: the port can only be host (also provider of power)
  • Device mode: the port can only be device (also consumer of power)
  • Dual-Role mode: the port can be either host or device

Port types:

  • DFP (Downstream Facing Port): Host, specifically associated with flow of data (Host or Hub) in a USB link
  • Source: Port that asserts Rp (pull-up resistor) on CC pin and provides power on VBUS when attached to a Sink (device). At power-up a DFP is a source.
  • UFP (Upstream Facing Port): Device, specifically associated with flow of data (device) in a USB link
  • Sink: Port that asserts Rd (pull-down) on CC pin and consumes power from VBUS when attached. At power-up a UFP is a sink
  • DRP (Dual-Role Port): Host or Device

Valid Source-to-Sink connections:

  • Table 1 describes valid Source-to-Sink connections
  • Source to Source or Sink to Sink have no function

Table 1. Valid Source-to-Sink Connections

POWER ROLES SOURCE ONLY SINK ONLY DUAL ROLE POWER (DRP)
Source Only Not allowed Allowed Allowed
Sink Only Allowed Not allowed Allowed
Dual Role Power (DRP) Allowed Allowed Allowed
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