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UCC21732: UCC21732 gate driver to control a full bridge inverter

Biruk Damitie
Prodigy 200 points
Part Number: UCC21732

Tool/software:

Hello Experts,

I was trying to use one gate driver for one leg (one high-side and one low-side MOSFET) and another gate driver for the second leg (one high-side and one low-side MOSFET). But I realized that UCC21732 is a single channel gate driver, meaning it can drive one MOSFET (either high-side or low-side) at a time). 

So, I'm considering using the UCC21732 gate driver to control a full bridge inverter. Given that the UCC21732 is a single-channel gate driver, is it suitable for this application? If not, are there any alternative configurations or additional components that could be used to reduce the number of required gate drivers while still achieving reliable control of the full bridge inverter?

Best regards,
Biruk

  • 0
    TI__Expert 8065 points

    Hi Biruk,

    Thanks for your interest with UCC21732. As you noticed that it is a single channel gate driver, you need 4 of these drivers for a full bridge inverter. There are no other options while using the single channel driver.

    But we have dual channel isolate gate drivers, if you need to control 2 FETs in a leg (high side and low side)

    Thanks

    Sasi

  • 0 in reply to Sasikala Thangam
    Prodigy 200 points

    Hi Sasi,

    Thank you for your quick reply.

    1. Did you mean that using the UCC21732 gate driver in parallel for a full bridge inverter is not possible?

    2. Could you tell me the dual channel gate driver that is equivalent to UCC21732??


    ~Biruk


  • 0 in reply to Biruk Damitie
    TI__Expert 8065 points

    Hi Biruk,

    Can you please share your application requirement, do you need all the UCC21732 device capability in a dual channel driver? (at present our current dual channel drivers, don't have 10A drive strength and also doesn't have the advanced features like DESAT/ CLMP.

    If all such features are needed, then you need to plan single channel drivers only and you need 1 for HS, and 1 for LS for each leg. Hope it explains.

    you can use UCC21732 for parallel operation, but not sure how you plan in the full bridge.