LM25069MM-2EVAL: slew rate of inrush current

Bin Pan

Part Number: LM25069MM-2EVAL

The inrush current can be limited to below the value set by Rs when insertion time, but I found the inrush current reached the limit value immediately when insert, how can I control the slew rate of inrush current?

over 3 years ago

0 Avishek Pal over 3 years ago

TI__Mastermind 40850 points

Hi Bin,

Thanks for reaching out. However, I am unable to understand your query or issue properly. Please explain in detail preferable using waveforms.

+1 Bin Pan over 3 years ago in reply to Avishek Pal

Prodigy 20 points

Picture 1 is the schematic, picture 2 is the inrush current waveform of VCC_12V when insert. We could see the inrush current is limited to below 12.5A which is set by R8076 in schematic, but the ramp of inrush current is very steep. I want to know if there is way to slow down the ramp of inrush current. TKS!

0 Bin Pan over 3 years ago in reply to Avishek Pal

Prodigy 20 points

0 Avishek Pal over 3 years ago in reply to Bin Pan

TI__Mastermind 40850 points

Please refer to this app note Robust Hot Swap Design (Rev. A) (ti.com).

0 Bin Pan over 3 years ago in reply to Avishek Pal

Prodigy 20 points

Thanks! this document resolved my issue

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LM25069MM-2EVAL: slew rate of inrush current