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LM51770: Usage with external driver

Nicolas Murguizur
Prodigy 210 points
Part Number: LM51770


Tool/software:

Hi,

I want to use the logic level outputs and use an external driver because I want to use standard level MOSFETs.

What should I do with the unused driver pins?

Regards

  • +1
    TI__Guru 67130 points

    Hello Nicolas,

    You need to use LO1 and LO2 for the drivers of the low side FETs. The digital outputs HO1_LL and HO2_LL are for the high-side MOSFET drivers only.

    SW1 and SW2 need to be connected to the switch nodes and the capacitors to HB1 and HB2 need to still be there and connected like in the above picture.

    VCC and PGND need to be connected like in the above picture.

    Best regards,
    Brigitte