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LMR14050: Could you kindly help to check the below schematic, and give some advice about it.

Lian Wu
Genius 5250 points
Part Number: LMR14050

Dears:

Could you kindly help to check the below schematic, and give some advice about it.

  • 0
    TI__Mastermind 27295 points
    Hi Luck,

    What's load current?
    Pls use 4.7uH for 4V2 and 5V conversion, is input 24V for POE 12Vout? inductor should be 8.2uH for this coversion, and output ceramic cap voltage rating should be >=25V.

    Also suggest to add 4.7ohm in series with Cboot for all conversions.

    feel free to send me email at andy.chen@ti.com for further help.
  • 0 in reply to Andy Chen
    Genius 5250 points
    Hi Andy：
    The output of 4.2V and 5V's load current is fewer 5A.
    The output of 12V's load current is about 3A.
    And I have another query about the design's output is 12V. If the Input voltage is 12V, is there any influence about the design?
    Pls. kindly help to give some advice.
  • 0 in reply to Lian Wu
    TI__Mastermind 27295 points
    Hi Luck,

    The actual output voltage maybe 11V for 12Vin to 12Vout /3A conversion. is it OK for your application? then 2.2uH is OK if input is stable 12V