SLUAAT3 November   2023 TPS56837

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Why Soft Start is Needed
  5. 2Soft Start Principle
    1. 2.1 General Principle
    2. 2.2 Internal and External Soft Start
  6. 3Behaviors Related to Soft Start of TPS56837
    1. 3.1 Soft Start Sequence
    2. 3.2 Soft Start Discharge
    3. 3.3 UVP Hiccup Time
  7. 4How to Co-Lay TPS56837 and TPS56637
    1. 4.1 Pinout Differences of TPS56837 and TPS56637
    2. 4.2 Co-lay Guidance TPS56837 and TPS56637
  8. 5Summary
  9. 6References

4.2 Co-lay Guidance TPS56837 and TPS56637

TPS56837 can both leave SS pin floating with default 1.8-ms soft start time and connect external capacitor with desired soft start time. TPS56637 NC pin must not be connected and TPS56637 has default internal soft start time 2 ms.

So, TPS56837 and TPS56637 can directly change to each other by using TPS56837 default internal soft start. TPS56837 and TPS56637 can co-lay if longer soft start time of TPS56837 is needed. A place for external soft start capacitor is added and left at NC for TPS56637. Figure 4-2 shows co-lay guidance of TPS56837 and TPS56637 with external soft start capacitor.

GUID-20231121-SS0I-C18D-LLTX-RS02CXG08X6M-low.svgFigure 4-2 Co-lay Guidance