SLVSDB5B July   2018  – August 2021 TPS65988

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  Thermal Information
    5. 6.5  Power Supply Requirements and Characteristics
    6. 6.6  Power Consumption Characteristics
    7. 6.7  Power Switch Characteristics
    8. 6.8  Cable Detection Characteristics
    9. 6.9  USB-PD Baseband Signal Requirements and Characteristics
    10. 6.10 BC1.2 Characteristics
    11. 6.11 Thermal Shutdown Characteristics
    12. 6.12 Oscillator Characteristics
    13. 6.13 I/O Characteristics
    14. 6.14 PWM Driver Characteristics
    15. 6.15 I2C Requirements and Characteristics
    16. 6.16 SPI Controller Timing Requirements
    17. 6.17 HPD Timing Requirements
    18. 6.18 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  USB-PD Physical Layer
        1. 8.3.1.1 USB-PD Encoding and Signaling
        2. 8.3.1.2 USB-PD Bi-Phase Marked Coding
        3. 8.3.1.3 USB-PD Transmit (TX) and Receive (Rx) Masks
        4. 8.3.1.4 USB-PD BMC Transmitter
        5. 8.3.1.5 USB-PD BMC Receiver
      2. 8.3.2  Power Management
        1. 8.3.2.1 Power-On And Supervisory Functions
        2. 8.3.2.2 VBUS LDO
        3. 8.3.2.3 Supply Switch Over
      3. 8.3.3  Port Power Switches
        1. 8.3.3.1 PP_HV Power Switch
          1. 8.3.3.1.1 PP_HV Over Current Clamp
          2. 8.3.3.1.2 PP_HV Over Current Protection
          3. 8.3.3.1.3 PP_HV OVP and UVP
          4. 8.3.3.1.4 PP_HV Reverse Current Protection
        2. 8.3.3.2 Schottky for Current Surge Protection
        3. 8.3.3.3 PP_EXT Power Path Control
        4. 8.3.3.4 PP_CABLE Power Switch
          1. 8.3.3.4.1 PP_CABLE Over Current Protection
          2. 8.3.3.4.2 PP_CABLE Input Good Monitor
        5. 8.3.3.5 VBUS Transition to VSAFE5V
        6. 8.3.3.6 VBUS Transition to VSAFE0V
      4. 8.3.4  Cable Plug and Orientation Detection
        1. 8.3.4.1 Configured as a DFP
        2. 8.3.4.2 Configured as a UFP
        3. 8.3.4.3 Configured as a DRP
        4. 8.3.4.4 Fast Role Swap Signaling
      5. 8.3.5  Dead Battery Operation
        1. 8.3.5.1 Dead Battery Advertisement
        2. 8.3.5.2 BUSPOWER (ADCIN1)
      6. 8.3.6  Battery Charger Detection and Advertisement
        1. 8.3.6.1 BC1.2 Data Contact Detect
        2. 8.3.6.2 BC1.2 Primary and Secondary Detection
        3. 8.3.6.3 Charging Downstream Port Advertisement
        4. 8.3.6.4 Dedicated Charging Port Advertisement
        5. 8.3.6.5 2.7V Divider3 Mode Advertisement
        6. 8.3.6.6 1.2V Mode Advertisement
        7. 8.3.6.7 DCP Auto Mode Advertisement
      7. 8.3.7  ADC
      8. 8.3.8  DisplayPort HPD
      9. 8.3.9  Digital Interfaces
        1. 8.3.9.1 General GPIO
        2. 8.3.9.2 I2C
        3. 8.3.9.3 SPI
      10. 8.3.10 PWM Driver
      11. 8.3.11 Digital Core
      12. 8.3.12 I2C Interfaces
        1. 8.3.12.1 I2C Interface Description
        2. 8.3.12.2 I2C Clock Stretching
        3. 8.3.12.3 I2C Address Setting
        4. 8.3.12.4 Unique Address Interface
        5. 8.3.12.5 I2C Pin Address Setting (ADCIN2)
      13. 8.3.13 SPI Controller Interface
      14. 8.3.14 Thermal Shutdown
      15. 8.3.15 Oscillators
    4. 8.4 Device Functional Modes
      1. 8.4.1 Boot
      2. 8.4.2 Power States
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Type-C VBUS Design Considerations
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 External Sink Power Path Options
            1. 9.2.1.2.1.1 Load Switch Power Path
            2. 9.2.1.2.1.2 Discrete Power Path
          2. 9.2.1.2.2 Type-C Connector VBUS Capacitors
          3. 9.2.1.2.3 VBUS Schottky and TVS Diodes
          4. 9.2.1.2.4 VBUS Snubber Circuit
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Dual Port Thunderbolt Notebook with AR Supporting USB PD Charging
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 USB Power Delivery Source Capabilities
        3. 9.2.2.3 USB Power Delivery Sink Capabilities
        4. 9.2.2.4 Supported Data Modes
        5. 9.2.2.5 RESETN
        6. 9.2.2.6 I2C Design Requirements
        7. 9.2.2.7 TS3DS10224 SBU Mux for AUX and LSTX/RX
        8. 9.2.2.8 Thunderbolt Flash Options
      3. 9.2.3 Dual Port USB & Displayport Notebook Supporting PD Charging
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 USB Power Delivery Source Capabilities
        3. 9.2.3.3 USB Power Delivery Sink Capabilities
        4. 9.2.3.4 Supported Data Modes
        5. 9.2.3.5 TUSB1044 Re-Driver GPIO Control
      4. 9.2.4 USB Type-C & PD Monitor/Dock
        1. 9.2.4.1 Design Requirements
        2. 9.2.4.2 Detailed Design Procedure
          1. 9.2.4.2.1 USB Power Delivery Source Capabilities
          2. 9.2.4.2.2 USB and DisplayPort Supported Data Modes
          3. 9.2.4.2.3 TUSB1064 Super Speed Mux GPIO Control
  10. 10Power Supply Recommendations
    1. 10.1 3.3-V Power
      1. 10.1.1 VIN_3V3 Input Switch
      2. 10.1.2 VBUS 3.3-V LDO
    2. 10.2 1.8-V Power
    3. 10.3 Recommended Supply Load Capacitance
  11. 11Layout
    1. 11.1  Layout Guidelines
    2. 11.2  Layout Example
    3. 11.3  Stack-Up and Design Rules
    4. 11.4  Main Component Placement
    5. 11.5  1.4 Super Speed Type-C Connectors
    6. 11.6  Capacitor Placement
    7. 11.7  CC1/2 Capacitors & ADCIN1/2 Resistors
    8. 11.8  CC & SBU Protection Placement
    9. 11.9  CC Routing
    10. 11.10 DRAIN1 and DRAIN2 Pad Pours
    11. 11.11 USB2 Routing for ESD Protection and BC1.2
    12. 11.12 VBUS Routing
    13. 11.13 Completed Layout
    14. 11.14 Power Dissipation
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Firmware Warranty Disclaimer
    2. 12.2 Receiving Notification of Documentation Updates
    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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.12.1 I2C Interface Description

The TPS65988 support Standard and Fast mode I2C interface. The bidirectional I2C bus consists of the serial clock (SCL) and serial data (SDA) lines. Both lines must be connected to a supply through a pull-up resistor. Data transfer may be initiated only when the bus is not busy.

A master sending a Start condition, a high-to-low transition on the SDA input/output, while the SCL input is high initiates I2C communication. After the Start condition, the device address byte is sent, most significant bit (MSB) first, including the data direction bit (R/W).

After receiving the valid address byte, this device responds with an acknowledge (ACK), a low on the SDA input/output during the high of the ACK-related clock pulse. On the I2C bus, only one data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the high pulse of the clock period as changes in the data line at this time are interpreted as control commands (Start or Stop). The master sends a Stop condition, a low-to-high transition on the SDA input/output while the SCL input is high.

Any number of data bytes can be transferred from the transmitter to receiver between the Start and the Stop conditions. Each byte of eight bits is followed by one ACK bit. The transmitter must release the SDA line before the receiver can send an ACK bit. The device that acknowledges must pull down the SDA line during the ACK clock pulse, so that the SDA line is stable low during the high pulse of the ACK-related clock period. When a slave receiver is addressed, it must generate an ACK after each byte is received. Similarly, the master must generate an ACK after each byte that it receives from the slave transmitter. Setup and hold times must be met to ensure proper operation.

A master receiver signals an end of data to the slave transmitter by not generating an acknowledge (NACK) after the last byte has been clocked out of the slave. The master receiver holding the SDA line high does this. In this event, the transmitter must release the data line to enable the master to generate a Stop condition.

Figure 8-23 shows the start and stop conditions of the transfer. Figure 8-24 shows the SDA and SCL signals for transferring a bit. Figure 8-25 shows a data transfer sequence with the ACK or NACK at the last clock pulse.

GUID-F9CD616E-1D39-4E9F-BEDE-C8FC2CE606AC-low.gifFigure 8-23 I2C Definition of Start and Stop Conditions
GUID-26C8F833-D1D6-4DF6-A2AA-94B5D1464161-low.gifFigure 8-24 I2C Bit Transfer
GUID-BE7E6C3D-DEE7-41B2-AA0C-1002E55AF3E2-low.gifFigure 8-25 I2C Acknowledgment