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LMG1020: short pulses using lower voltage at power stage

REDWAN BIJOY
Prodigy 20 points
Part Number: LMG1020

HI,

I would like to use this driver for my senior design project. For an application, I saw that the voltage at Vbus is 70V.

I would like to know if it's possible to get short pulses using lower voltage at Vbus and use different MOSFET. 

Thanks,

Redwan

  • 0
    TI__Expert 3225 points

    Hi Redwan,

    Sure you can do it. LMG1020 is just a low side FET driver. Please feel free to use it for other MOSFETs, DC bus voltage and pulse width. The 70V DC bus voltage was just for the LiDAR application that with certain loop inductance and targeted current pulse, you have to achieve this voltage with a 1ns pulse. However, with varied pulse width and loop design, you can achieve desired current level with different DC voltage.

    Thanks and regards,

    Lixing

  • 0 in reply to Lixing Fu
    Prodigy 20 points
    Hi Lixing,

    Thanks for your reply. I am also using LiDAR technique for my project and trying achieve ns pulse. So, is it possible to get that desired pulses by using different DC voltage?

    Best Regards,

    Redwan
  • 0 in reply to REDWAN BIJOY
    TI__Expert 3225 points
    Hi Redwan,

    The DC bus voltage such as 70V we are talking about here is typically for the whole power loop. The driver itself can just have 5V supply. This 5V is used to drive the gate of your FET, and you can apply whatever DC bus voltage you prefer. And yes, for the same amount of current that you wanted to achieve, you can use varied DC bus voltage and different pulse width to realize it.

    Thanks and regards,
    Lixing