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TPS65023: Importing PSPICE model

Ivan Soc
Prodigy 30 points
Part Number: TPS65023

Hello,

After importing Pspice model of the TPS65023, there are pins named FPWMDCDC1 and PGOOD that I am not able to correlate to pins names found in datasheets.

Can you tell me how these pins need to be connected in order for this simulation works properly?

Thanks

Ivan

  • 0
    TI__Expert 6700 points

    Hello Ivan,

    Our engineer assigned to this project is out of office until next week. She will respond at that time. Thank you.

    Regards,

    Alex

  • 0
    TI__Genius 11020 points

    Hello Ivan,

    These are actually register bits and not pins. Pull FPWM pin high for forced PWM operation. PGOOD1 is indication that voltage has reached the target window.

    Thanks.

    Regards,

    Tomi Koskela

  • 0 in reply to Tomi Koskela
    Prodigy 30 points

    Hello Tomi, 

    What is wrong with this schematic?

    Thanks

  • 0 in reply to Ivan Soc
    TI__Genius 14730 points

    Hello Ivan,

    Sorry for the delay, the assigned engineer supporting this device will get back to you soon. 

    Regards,

    Ishtiaque Panhwar 

  • 0 in reply to Ivan Soc
    TI__Mastermind 21135 points

    Hi Ivan,

    Take a look at the Schematic Checklist for this device. If you would like a full schematic review, please fill out the "Check if Complete" column and share the finished document with us so we can provide a second pass.

    Just looking at the schematic portion you shared above, I would caution that the VINDCDC1 pin should be connected to the same supply as the VINDCDC2, VINDCDC3, and VCC pins. I'm not sure what your full design looks like, but the 1.5V battery would not support a 3.3V output on another DCDC power rail for example. Also, I believe the VCC pin is monitored for a UVLO threshold of 2.35V according to this section in the datasheet:

    The DCDC1_EN pin is usually connected separately from the input voltage for better sequencing control. You may want to separate the enable from the input so that you can achieve a stable input voltage before switching on the power rail. Switching the rail on before the input voltage is ready might create a power fault.

    Regards,

    James