Tool/software:
Hello TI team,
I am working on creating calculation for the use of LM5157-Q1, however, I did not find any document reference to calculate the power loss on the IC, and only the calculation tool is depicting a extreme value above 1W around 9W but this power loss will be at the output of the IC.
Could you please share any reference to verify this value?
Hello Moritz,
I appreciate your quickly response let me share some comments about the share appnote:
*Page 7 and 8 are depicting some equations, but I think, could some of them be omitted?
I mean, the LM5157QRTERQ1 IC contains internally the mosfet, and datasheet is not providing all the data related to this component so the power loss calculation for Pic is calculate as follows:
but the gate charge of the mosfet is not shared on datasheet, I would be ablle to calculate but even the capacitance of the mosfet is not shared as well.
I could use this formula to math the power loss over the IC using the PQ formula:
but, one more time, I notice that I need the tr and tf value and these values are not share on datasheet, would I have to estimate or something like that?
Let me know if I am wrong, because normally to calculate some values to know the power loss, values from the mosfet specifically are needed.
