SLVSEZ5A July   2020  – December 2020 TPS25814

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  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  Recommended Capacitance
    5. 6.5  Thermal Information
    6. 6.6  Power Supply Characteristics
    7. 6.7  Power Consumption
    8. 6.8  PP_5V Power Switch Characteristics
    9. 6.9  Power Path Supervisory
    10. 6.10 CC Cable Detection Parameters
    11. 6.11 CC VCONN Parameters
    12. 6.12 Thermal Shutdown Characteristics
    13. 6.13 Input/Output (I/O) Characteristics
    14. 6.14 BC1.2 Characteristics
    15. 6.15 I2C Requirements and Characteristics
    16. 6.16 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power Paths
        1. 8.3.1.1 Internal Sourcing Power Paths
          1. 8.3.1.1.1 PP_5V Current Clamping
          2. 8.3.1.1.2 PP_5V Local Overtemperature Shut Down (OTSD)
          3. 8.3.1.1.3 PP_5V OVP
          4. 8.3.1.1.4 PP_5V UVLO
          5. 8.3.1.1.5 PP_5Vx Reverse Current Protection
          6. 8.3.1.1.6 PP_CABLE Current Clamp
          7. 8.3.1.1.7 PP_CABLE Local Overtemperature Shut Down (OTSD)
          8. 8.3.1.1.8 PP_CABLE UVLO
      2. 8.3.2 Cable Plug and Orientation Detection
        1. 8.3.2.1 Configured as a Source
      3. 8.3.3 Overvoltage Protection (CC1, CC2)
      4. 8.3.4 Default Behavior Configuration (ADCIN1, ADCIN2)
      5. 8.3.5 BC 1.2 (USB_P, USB_N)
      6. 8.3.6 Digital Interfaces
        1. 8.3.6.1 Fault Indicators ( FAULT )
        2. 8.3.6.2 Sink Attachment Indicator ( SINK )
        3. 8.3.6.3 Polarity Indicator ( POL )
        4. 8.3.6.4 Power Management ( CHG_HI)
        5. 8.3.6.5 Battery Charging Control (CTL)
        6. 8.3.6.6 Debug Accessory Detection ( DEBUG)
        7. 8.3.6.7 Disable the Port (EN)
        8. 8.3.6.8 I2C Interface
      7. 8.3.7 I2C Interface
        1. 8.3.7.1 I2C Interface Description
        2. 8.3.7.2 I2C Clock Stretching
        3. 8.3.7.3 I2C Address Setting
        4. 8.3.7.4 Unique Address Interface
    4. 8.4 Device Functional Modes
      1. 8.4.1 Pin Strapping to Configure Default Behavior
      2. 8.4.2 Power States
      3. 8.4.3 Schottky for Current Surge Protection
      4. 8.4.4 Thermal Shutdown
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Type C DFP Port Implementation with Embedded Controller
        1. 9.2.1.1 Detailed Design Procedure
          1. 9.2.1.1.1 Type-C Connector VBUS Capacitors
          2. 9.2.1.1.2 VBUS Schottky and TVS Diodes
          3. 9.2.1.1.3 VBUS Snubber Circuit
        2. 9.2.1.2 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 3.3-V Power
      1. 10.1.1 VIN_3V3 Input Switch
    2. 10.2 1.5-V Power
    3. 10.3 Recommended Supply Load Capacitance
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Top TPS25814 Placement and Bottom Component Placement and Layout
    2. 11.2 Layout Example
    3. 11.3 Component Placement
    4. 11.4 Routing and View Placement
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

8.3.2.1 Configured as a Source

When configured as a source, the TPS25814 detects when a cable or a Sink is attached using the CC1 and CC2 pins. When in a disconnected state, the TPS25814 monitors the voltages on these pins to determine what, if anything, is connected. See USB Type-C Specification for more information.

Table 8-1 shows the Cable Detect States for a Source.

Table 8-1 Cable Detect States for a Source
CC1CC2CONNECTION STATERESULTING ACTION
OpenOpenNothing attachedContinue monitoring both CCy pins for attach. Power is not applied to VBUS or VCONN.
RdOpenSink attachedMonitor CC1 for detach. Power is applied to VBUS but not to VCONN (CC2).
OpenRdSink attachedMonitor CC2 for detach. Power is applied to VBUS but not to VCONN (CC1).
RaOpenPowered Cable-No UFP attachedMonitor CC2 for a Sink attach and CC1 for cable detach. Power is not applied to VBUS or VCONN (CC1).
OpenRaPowered Cable-No UFP attachedMonitor CC1 for a Sink attach and CC2 for cable detach. Power is not applied to VBUS or VCONN (CC1).
RaRdPowered Cable-UFP AttachedProvide power on VBUS and VCONN (CC1) then monitor CC2 for a Sink detach. CC1 is not monitored for a detach.
RdRaPowered Cable-UFP attachedProvide power on VBUS and VCONN (CC2) then monitor CC1 for a Sink detach. CC2 is not monitored for a detach.
RdRdDebug Accessory Mode attachedSense either CCy pin for detach.
RaRaAudio Adapter Accessory Mode attachedSense either CCy pin for detach.

When a TPS25814 port is configured as a Source, a current IRpDef is driven out each CCy pin and each pin is monitored for different states. When a Sink is attached to the pin a pull-down resistance of Rd to GND exists. The current IRpDef is then forced across the resistance Rd generating a voltage at the CCy pin. The TPS25814 applies IRpDef until it closes the switch from PP5V to VBUS, at which time it may change to IRp1.5A or IRp3.0A.

When the CCy pin is connected to an active cable VCONN input, the pull-down resistance is different (Ra). In this case the voltage on the CCy pin will be lower and the TPS25814 recognizes it as an active cable.

The voltage on CCy is monitored to detect a disconnection depending upon which Rp current source is active. When a connection has been recognized and the voltage on CCy subsequently rises above the disconnect threshold for tCC, the system registers a disconnection.