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Original question:

Recommendation for gate driver

Gate driver for Cuk Converter

Carlo
Expert 7715 points
Other Parts Discussed in Thread: LM5155

Hi team,


Good day.

Our customer is looking for a gate driver with spice model available to be used for Cuk Converter. Here are the requirements:
Vcc = 30 to 60V
Channels = 1
Switch Type = MOSFET
Driver Topology = Low side
Output = 1kW, 45V

I have checked our product list, however, it seems that the maximum input supply of our gate drivers is up to 40V only. Looking into our reference designs for Cuk Converter, supply is within 40V only.

http://www.ti.com/tool/PMP30487

https://www.ti.com/tool/PMP8639


Do you have any recommendations for this?


Thank you in advance for your help.

Regards,
Carlo

  • 0
    TI__Guru**** 189399 points

    Hi, Carlo,

    The parts used in the PMPs you referenced aren't gate drivers, they are controllers made by a different group.

    Let me re-assign your post to that group for comment.

  • 0 in reply to Don Dapkus
    TI__Guru 68675 points

    Hi Carlo.

    1kW sounds excessive for a Cuk converter.  Anyway, most of our boost controllers can implement a Cuk.  However, this 1kW makes our controlles' internal drive insufficient.  You should employ an external driver, either consisting of discrete driver like two FETs in totem pole, or a driver IC like the LM51xx type, along with our boost controllers like the LM5155 for the PWM control. 

    Hope this clarifies.

    Thanks,

    Youhao Xi, Applications Engineering

  • 0 in reply to Youhao Xi
    TI__Expert 7715 points

     Hi Youhao,

    From my understanding, since the  LM5155 has an internal PWM, does it mean that I don't need to set a PWM to drive the gate while using this IC?

    Regards,
    Carlo

  • 0 in reply to Carlo
    TI__Guru 68675 points

    Hi Carlo,

    If I understand you correctly:  The LM5155 will handle the PWM, and you need to use the GATE pin signal of the LM5155 as the input signal to your external driver. 

    Thanks,

    Youhao