SLVSIF2 July   2025 TPD4S201

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings—JEDEC Specification
    3. 5.3 ESD Ratings—IEC Specification
    4. 5.4 Recommended Operating Conditions
    5. 5.5 Thermal Information
    6. 5.6 Electrical Characteristics
    7. 5.7 Timing Requirements
    8. 5.8 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 4-Channels of Short-to-VBUS Overvoltage Protection (CC1, CC2, SBU1, SBU2 Pins or CC1, CC2, DP, DM Pins): 28-VDC Tolerant
      2. 6.3.2 CC1, CC2 Overvoltage Protection FETs 600-mA Capable for Passing VCONN Power
      3. 6.3.3 CC Dead Battery Resistors Integrated for Handling the Dead Battery Use Case in Mobile Devices
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 VBIAS Capacitor Selection
        2. 7.2.2.2 Dead Battery Operation
        3. 7.2.2.3 CC Line Capacitance
        4. 7.2.2.4 Additional ESD Protection on CC and SBU Lines
        5. 7.2.2.5 FLT Pin Operation
        6. 7.2.2.6 How to Connect Unused Pins
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

7.2.2.2 Dead Battery Operation

For this application, we want to support 100W dead battery operation. When the device is out of battery, dead battery mode is entered. During dead battery mode, enable the USB PD Controller to receive power and apply the maximum charging conditions of 20V and 5A. The TPS25751 has a built in LDO to supply the TPS25751 power from VBUS in a dead battery condition.

The OVP FETs of the TPD4S201 remain OFF when unpowered to provide protection in dead battery or unpowered situations. However, when the OVP FETs are OFF, this isolates the TPS25751s dead battery resistors from the USB Type-C ports CC pins. A USB Type-C power adapter is required to sense the RD pull-down dead battery resistors on the CC pins to provide power on VBUS. Since the dead battery resistors of the TPS25751 are isolated from the USB Type-C connector CC pins, connect the dead battery resistors of the TPD4S201. Short the RPD_G1 pin to the C_CC1 pin, and short the RPD_G2 pin to the C_CC2 pin.

Once the power adapter sees the dead battery resistors of the TPD4S201, 5V is applied on the VBUS pin. The pin provides power to the TPS25751, turning the PD controller on, and allowing the battery to begin to charge. However, this application requires 100W charging in dead battery mode, so VBUS at 20V and 5A is required. USB PD negotiation is required to accomplish this, so the TPS25751 needs to be able to communicate on the CC pins. To expose the PD controller to the CC lines, turn on the TPD4S201 in dead battery mode. To turn on the device, the TPD4S201 is powered by the internal LDO of the TPS25751, the LDO_3V3 pin. When the TPS25751 receives power on VBUS, the TPD4S201 is turned on simultaneously.

The dead battery resistors of the PD controller also need to be present so the PD controller properly boots up in dead battery operation with the correct voltages on the CC pins.

Once this process has occurred, the TPS25751 can start negotiating with the power adapter through USB PD for higher power levels, allowing 100W operation in dead battery mode.

For more information on the TPD4S201 dead battery operation, see the CC Dead Battery Resistors Integrated for Handling the Dead Battery Use Case in Mobile Devices section of the data sheet.