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UCC24610: UCC24610

Salih Dindar
Prodigy 40 points
Part Number: UCC24610
Other Parts Discussed in Thread: UCC24650, UCC24612

Hi TI team,

Can you share SPICE model for UCC24610? There is .lib files for ucc24650, but there is no UCC24610 pspice model. Thus, we don't establish them to Orcad and don't make sycrnous rectifer flyback converter. There are some models for sycronous rectifier flyback. However, they are not full for making sycronous rectifier flyback. Can you help me? 

 

  • 0
    TI__Mastermind 40580 points

    Hello Salih, 

    Thank you for your interest in the UCC24610 SR controller. 

    Unfortunately, this controller did not have any simulation model generated at all.  
    I suggest that you use a diode model for the secondary rectifier to run your system simulations.  If you set a very low forward voltage drop for the diode (say 50~100mV), you can simulate similar system performance as if there was an SR in place. 

    As an alternative, you may consider using the UCC24612 SR controller in this application, but it only has a SIMPLIS model available ( https://www.ti.com/lit/zip/slum597 ); no PSpice model.  However, you may be able to translate the Simplis model into PSpice.  

    Regards,
    Ulrich

  • 0 in reply to Ulrich Goerke
    Prodigy 40 points

    Hello Ulrich, how to translate SIMPLIS model to Pspice model? I didn't find it.

    Thanks.

  • 0 in reply to Salih Dindar
    TI__Mastermind 40580 points

    Hello Salih, 

    I'm sorry, I don't know if there is a translation program available on the web.  

    Whether there is one or not, I just realized that the Simplis model is encrypted so a translator tool would not be able to convert it anyway. 
    And even if you had a license for Simplis simulator, you would not be able to open the UCC24612 model.  You can run a simulation with it, but you cannot open the device model to see how it works. 

    I suggest that you construct your own SR controller model from primitive generic components available in PSpice.
    In its most rudimentary form, an SR controller just needs to turn on the MOSFET when its Vds < -0.3V and turn it off when the Vds > -0.01V. 
    It can be made from some comparators and a controlled voltage source.   

    Regards,
    Ulrich

  • 0 in reply to Ulrich Goerke
    TI__Mastermind 40580 points

    Hello Salih, 

    To your follow-on question " Hello Ulrich,  if  -0.01V > Vds > -0.3V, what should I do?  Turn off or Turn on? " my reply is: 

    When the SR MOSFET Vds voltage transitions from some high positive voltage, through 0V, to lower than -0.3V, turn on the SR MOSFET. 
    Once the SR MOSFET is on, leave it on until the Vds increases to -0.01V. 
    When Vds increases higher than -0.01V, then turn the MOSFET off.  

    Regards,
    Ulrich

  • 0
    Prodigy 40 points

    Hello Ulrich.

    I made it using controlled voltage source, but there is no power consuming this parts. Moreover, I don't think gate pwm has not noise. We need Pspice Models of component like UCC24610 SR. 

    Regards

    Salih

  • 0 in reply to Salih Dindar
    TI__Mastermind 40580 points

    Hello Salih,

    I am glad that your SR controller model is working. 
    You can estimate controller power loss by measuring the current into your controller circuit with a current probe and multiplying the average of that current with the voltage that powers the SR controller. 

    I don't know when a PSpice model of the UCC24610 can be developed.  This is not on our schedule, and I don't think there are plans to do so in the foreseeable future. 

    Regards,
    Ulrich 

  • 0 in reply to Ulrich Goerke
    Prodigy 40 points

    There is no problem for my circuit with sr control to be calculated by multiplying voltage and current. I wanted to take your opinion. Indeed,  at my circuit, there is a main pwm signal and there are little pwm with nano second values. Thus, how to cope with this problems. 

  • 0 in reply to Salih Dindar
    TI__Mastermind 40580 points

    Hi Salih, 

    I suggest to add a little hysteresis to the SR comparator, so that small variations in drain and source voltages at the trip threshold do not continually toggle the OUT signal.  Maybe start with 5mV of hysteresis, and increase in small increments if some residual toggling still remains.  

    Regards,
    Ulrich