SLVAFG6B December   2022  – November 2024 TPS25762-Q1 , TPS25763-Q1 , TPS25772-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Terms and Abbreviations
  5. 2 SPM Engine Overview
  6. 3Multi-Port Power Allocation Policy
    1. 3.1 Assured Capacity Policy
    2. 3.2 Shared Capacity Policy
      1. 3.2.1 Fair Share Power Policy
        1. 3.2.1.1 Blind Sink Support
    3. 3.3 Hybrid Mode
  7. 4Power Foldback Policy
    1. 4.1 Thermal Foldback Operation
    2. 4.2 Engine On/Off Transition Management
      1. 4.2.1 Engine On/Off Power Foldback Operation Example
  8. 5Multi-Port Power Allocation Policy Examples
    1. 5.1 Assured Capacity Policy Example
    2. 5.2 Fair Share Power Policy Example
      1. 5.2.1 FSP Policy Example – Blind Sink Support
      2. 5.2.2 FSP Policy Example – Blind Sink Support With Max Power
    3. 5.3 Hybrid Mode Example
  9. 6References
  10. 7Revision History

3 Multi-Port Power Allocation Policy

The SPM Engine, which contains the Multi-port Power Allocation Policy, is configurable using the TPS257XX-Q1-GUI. The following parameters are configured per system requirements for correct SPM operations.

Table 3-1 SPM Engine Parameters
SPM Engine Parameters Description
System Max Power Total system power capacity that is allocated to all ports
Port Max Power Maximum VBUS power for each port. Power contract is limited to the maximum value configured in this parameter
Port Min Power Minimum VBUS power for each port. Minimum power configured in this parameter is designed for each port.

The SPM Engine parameters can be configured from the GUI's Advanced Configuration View menu. Refer to the TPS257xx-Q1 GUI Configuration Guide for more information. Figure 3-1 shows the GUI's SPM power parameter configuration in the Advanced Configuration view.

SPM Engine Configurable Parameters – Advanced Configuration Figure 3-1 SPM Engine Configurable Parameters – Advanced Configuration