SLUAAV6 September   2024 TPS56837 , TPS56837H

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 USB Type-C Power Delivery Introduction
    2. 1.2 TPS56837HA Introduction
    3. 1.3 Block Diagram of TPS56837HA in USB Type-C Power Delivery Application
  5. 2PD Controller GPIO to Configure TPS56837HA Dynamically Output Change
    1. 2.1 Typical Application
    2. 2.2 Test Results
      1. 2.2.1 Dynamically Change Waveforms
      2. 2.2.2 Efficiency Curves
      3. 2.2.3 Thermal Pictures
  6. 3PD Controller Dedicated FB Pin to Control TPS56837HA Dynamic Output Change
    1. 3.1 FB Current Injection PD Controller
    2. 3.2 Rfb Integrated PD Controller
  7. 4Summary
  8. 5References

1.3 Block Diagram of TPS56837HA in USB Type-C Power Delivery Application

Figure 1-3 shows the block diagram of using TPS56837HA with PD controller to implement USB Type-C power design.

  • AC/DC output or Vin: the AC/DC output or Vin can be fixed voltage or can be controlled by PD controller to output needed voltage.
  • Bypass: PD controller can control the bypass on or off to directly bypass input to output so as to improve whole system efficiency.

    To avoid the output discharge causing power loss during bypass application, TPS56837HA does not support output discharge feature. This is the only difference between TPS56837HA and TPS56837H (support output discharge).

  • TPS56837HA and PD controller:
    • GPIO control output dynamically change: using PD controller GPIO signal to switch DC/DC feedback resistor configuration to dynamically change output voltage. Section 2 introduces the schematic and bench test results.
    • FB control output dynamically change: this design require PD controller has the ability to control DC/DC FB feature, for example, the PD controller has dedicated FB pin which can connect to DC/DC FB pin to dynamically change output voltage with PD firmware.
    • The following chapter introduces the details.
    TPS56837HA in USB Type-C Power Delivery Application Block DiagramFigure 1-3 TPS56837HA in USB Type-C Power Delivery Application Block Diagram