• TPS56339: Buck converter SW node have a -300mV

  

  Cicely Tang

  Part Number: TPS56339 Tool/software: Hi expert! I'm the FAE Cicely of south China, I have a question about the TPS56339EVM. IN the Buck converter, why the SW voltage is negative 300mV when the Low-Mosfet is on . Thanks very much!

  • 9 months ago
  • Power management
  • Power management forum
Answered

• RE: TPS54308: Switching current to flow under the device

  

  Ryan Hu (BSR-MV)

  Resolved

  Hi Lindsey, Generally speaking, the SW is not allowed to be routed under the IC. GND trace is ok. You can also follow the layout example of TPS56339EVM . This layout is better than the TPS54308.

  • over 5 years ago
  • Power management
  • Power management forum

• RE: WEBENCH® Tools/TPS54302: BURN IC

  

  Ryan Hu (BSR-MV)

  Hi, Over voltage on the input side is highly suspected. Please try to measure the voltage spike on the input cap under different conditions. Schematic of TPS54302 looks ok. On the layout, the 100nF MLCC cap at the input side should be very close to IC…

  • over 4 years ago
  • Power management
  • Power management forum

Didn't find what you are looking for? Post a new question.