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TPS54335 Not available in Web Bench tool.

logesh Sekar
Prodigy 60 points


Hi,

I'm not able to find the TPS54335 IC for simulation in the Web-Bench tool. Someone please tell me whether this component is active part or obsolete part? I have also attached the Web Bench Simulation report which i have generated earlier 2 months back.webench_design_4167490_84_67985089_TPS54335_3V3_1A15_85C.pdf

  • 0
    TI__Guru**** 191445 points
    That part is being redesigned. It should release in the next couple weeks.
  • 0 in reply to JohnTucker
    Prodigy 60 points
    why the component is being redesigned? Is there any problem in the performance of the IC? whether any enhancement required in old design?
    Shall i select this component for a new design? Else please suggest me an appropriate part.
  • 0 in reply to logesh Sekar
    TI__Guru**** 191445 points
    Are you currently using TPS54335? If so you should already have received the pertinent details. If this is for a new design, it should be safe to use and I can recommend it. I would not be concerned about webench, I seldom if ever use it. The datasheet equations are rather simple.
  • 0 in reply to JohnTucker
    Prodigy 60 points
    Yes we are currently using TPS54335 in our board. Now we are redesigning the board for next revision with small change in power requirements. Now the current requirement has increased from 1.15A to 1.55A for 3.3V output. For calculating the compensation values I would use Web-Bench tool. Do you have any other tool/spreadsheet tool to calculate the compensation values for the new power requirement?
  • 0 in reply to logesh Sekar
    TI__Guru**** 191445 points
    I personally use and recommend the pspice average model along with the instructions in the datasheet. Let me know if you need assistance with it.
  • 0 in reply to JohnTucker
    Prodigy 60 points
    Can you please tell me what are the compensation values to be chosen for this new power requirement? Please consider the below specifications for choosing the compensation values.

    Input Voltage - 10.8V to 26.4V
    Output Voltage - 3.3V
    Output Current - 1.55A
    Inductor value - 15uH
    Output Capacitance - 44uF

    If possible can you share me the pspice model simulation file?
  • 0 in reply to logesh Sekar
    TI__Guru**** 191445 points
    The pspice model is available on line. You can find it here:

    www.ti.com/.../slvm891

    You should be able to use it to derive your own compensation values. If I have to d it it may be a week or so until I can get to it.
  • 0
    Prodigy 205 points
    John,

    I have the same situation. Using Webench, I designed a multi-output PSU using two TPS54335 Swift devices. Vin = 24V +/-1V , Vout = 5.1V and 3.3V at 0.5A (a month ago). My customer requested we modify the design to for 1AMP output. I can work thru the equations manually but Webench provides credibility to the customer. My questions are:

    1) When will the new part be released and samples available? I need a date.
    2) Where can I find the Errata list on the old part?
    3) When will Webench be updated with the new part so we can use it for future modifications/simulations.
    4) Do you see any reason the TPS54335 (new or old version) can not meet the new input out put specifications? I can not.

    Thank you,

    Mike