LM5118: Power Dissipation calculation of LM5118MH

Thirupathi Thummala

Part Number: LM5118

Tool/software:

Hi Team,

Can you suggest a method to calculate the power dissipation of the LM5118MH during both operation and no-load conditions?

Thanks & Regards

Thirupathi T

0 Thirupathi Thummala 6 months ago

snvu065a-314KHz.xlsm
attached design sheet for your reference.

0 Stefan Schauer 6 months ago in reply to Thirupathi Thummala

Hi Thirupathi,

the main dissipation is drive by the lossed due to driving the MOSFET.

So you need to calculate the current into the MOSFET Gate signals.

- With that you can get the losses in the internal gate driver

- get the loss in the LDO

Best regards,

Stefan

Power management forum