I am designing a flyback converter circuit using the LT8302 flyback converter IC. Now, the efficiency of this chip is approx 85% as shown from the datasheet and the screenshot -
The value of 85% is an approx. Ofcourse, it depends on the load current and such. Now, this IC has an internal MOSFET for the switching controlling. The Rds of the MOSFET is 80mOhms. Now, when it is said that the efficiency is 85%, I understand it means approx 85% of the input power is able to be transferred to the output.
But, does this also include the power dissipated in the MOSFET as well ? And the power transferred ,does this mean the power transferred to the primary of the transformer or to the secondary ?
Because, the flyback transformer can add/introduce its own inefficiencies, right ?