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TPS40210: schematic check

Part Number: TPS40210

Hi Sir,

may we learn and help from you, 

may we know if this TPS40210 the schematic is correct? our condition is 54v to 12v(1.5A) at 0 deg to 85 deg.

if need to modify it , please kindly let us learn.

as following attachment.

IPGS-3810QXT_TPS40210.pdf

  • Hi Sir,

    any idea or suggestion? look forward to your reply, thanks you.

  • Hi Tommy,

    Thank you for designing with the TPS40210.  Not sure why you placed C32 and C86 across the timing capacitor C87.  They should be in parallel with C27 instead IMHO.

    In addition, I would remove C31+R78 because you already have a snubber placed between the MOSFET drain to the input line.  If you wish to use C31+R78, please change the connection from the MSOFET source to GND.  

    I would add one more 10uF (at least reserve the position there) in parallel with CE2, and I would select a smaller inductor for L2, like 0.18uH to 0.47uH, for the secondary LC filter.   You do not need a very large inductance there.

    The rest of the schematic basically looks okay, but you may need to fine tune the circuit by test.  

    Thanks,

    Youhao Xi, Applications Engineering

  • Hi Tommy,

    May I assume the issue is resolved so I can close this thread?  You are welcome to re-open it by following a new post.

    Thanks,

    Youhao