LM25118-Q1: Switching losses , conduction and driving losses

noureddine tariba

Prodigy 180 points

Part Number: LM25118-Q1
Other Parts Discussed in Thread: LM25118, LM5176

Hello

How I can evaluate the Switching losses , Conduction and Driving Losses for LM25118

regards

Noureddine

over 8 years ago

0 Vijay86929 over 8 years ago

TI__Genius 11490 points

Hi Tariba,

The switching and conduction losses can be calculated in a similar manner as the any other switcher (see LM5176 datasheet for example). The key differences from a generic switcher is that there will be two different modes. Buck and Buck-Boost modes. Each mode needs its own set of equations. In particular, pay attention to higher ripple in buck-boost mode and an extra diode in both buck and buck-boost modes.

A simpler method is to use the Webench applet on the web.

Another method is to look at the user guide/datasheet curves and estimate from there. The EVM is available on the web and can be used for this purpose as well.

Regards