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Original question:

TPS2663: TPS2663 Model not native in PSPICE for TI

TPS26630-33EVM: non-encrypted spice model for tps2663-33EVM

rana moeini
Prodigy 20 points

Part Number: TPS26630-33EVM
Other Parts Discussed in Thread: TPS2663

I need a non-encrypted spice model for tps2663-33EVM? Could yo please share your latest model? Can I use it on LTSpice?

 

In addition, Could you provide the time–current (I–t) curves for TPS2663, rather than the time–power‑dissipation curve? 

  • 0
    Prodigy 20 points

    Have you had a chance to review this?

  • 0 in reply to rana moeini
    TI__Mastermind 47021 points

    Hi Rana,

    Thermal shut-down time depends on the power dissipation not current. That's why we have time vs power.

    You can translate it to current based on your operating voltage. How ever during start-up voltage will be variable too.

    We recommend to use PSPICE for TI for eModel. 

    Thanks 
    Amrit 

  • 0 in reply to Amrit Jit
    Prodigy 20 points

       I tried to run the model but it shows error for library missing... I am not sure why. Could you please guide me where can I find the efuse model? 

    for the application, it;s 48V input voltage . load are 50w static and 2.5 mF . so we have some issue due to inrush current at start but also I need to make some time diagrams for different fault condition . I need working efuse model. 

  • 0 in reply to rana moeini
    TI__Mastermind 47021 points

    Hello Rana,

    On PSPICE model thermal based model won't be accurate or implemented. 

    Have tried increasing the dvdt cap?

    50W + 2.5mF charging current inrush would be too high and eFuse will go into thermal shutdown during start-up.

    You can charge the 2.5mF cap. Can you connect the 50W load when eFuse is fully ON. You can use the PGOOD pin as reference.

    Thanks 
    Amrit 

  • 0 in reply to Amrit Jit
    Prodigy 20 points

    I am using PGood. Do you have working model to share with me?. I am using TPS66230-33

     I use two efuse in parallel.  Please check if the 2x TPS2663 can share the same set for reverse blocking FET? In addition, check if one Rlim can be shared between the 2x TPS2663?  In that case, Rlim value will be reduced by 2x.

     

  • 0 in reply to rana moeini
    TI__Mastermind 47021 points

    Hi Rana,

    for parallel operation you can follow below app-note.

    Parallel Operation of TPS2663 eFuses

    1. reverse current depends on VIN-VOUT level. If VOUT>VIN then eternal FET will turn off. Find datasheet for the threshold value.

    2. RILIM can't be tied up together. It could lead to malfunction. 

    Thanks

    Amrit