LM5113: LM5113 and EPC2020 in synchronous boost

Part Number: LM5113

Hi,

I am designing an synchronous DC-DC boost converter 12 to 30V for LED applications. Can I use a LM5113 to drive a upper GAN?

Below my concepcion of converter:

1 Reply

  • Hello Piotr,

    Thanks for your question. I have reviewed your schematic, and it looks fine. The driver is able to drive the high side FET, and the two FETs can be controlled independently. Since the high side driver uses boot strap structure, please make sure that your boot strap capacitor C11 is selected properly according to the equation below. Also please have the bootstrap capacitor as close as possible to the IC since this will be part of the HS gate drive loop. 

    In addition, as a general recommendation, I would suggest for you to use LMG1205. This part is pin to pin compatible to the BGA LM5113, it has the same specifications and the advantage of  increased reliability.

    Hope this addresses your questions and please let me know if you need anything else.

    Thanks and regards,

    Lixing Fu