Timeline for Why do I get such high values when calculating the power dissipation of MOSFET in boost-converter circuit?
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| Jun 15, 2020 at 6:44 | answer | added | Warren Hill | timeline score: 1 | |
| Jun 14, 2020 at 17:02 | vote | accept | skudo | ||
| Jun 14, 2020 at 16:40 | comment | added | user16324 | What is the saturation current of those inductors? Also note, not all the 12V appears across the MOSFET : its ON resistance is 0.27 not 1.8 ohms. | |
| Jun 14, 2020 at 16:38 | history | edited | skudo | CC BY-SA 4.0 |
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| Jun 14, 2020 at 16:34 | comment | added | D.A.S. | You need basic understanding of L/R= T time constant for R= DCR of coil just like T=RC for R=ESR | |
| Jun 14, 2020 at 16:34 | answer | added | Andy aka | timeline score: 2 | |
| Jun 14, 2020 at 16:33 | comment | added | skudo | alright then. I'll look into this much more as it really seems like I didn't understand almost anything :P. Thank you | |
| Jun 14, 2020 at 16:33 | comment | added | The Photon | 2nd hint: what you calculated as \$R_{mean}\$ is not the mean resistance of the inductor. | |
| Jun 14, 2020 at 16:32 | comment | added | The Photon | First you call \$R_{mean}\$ the "mean resistance of the inductor" and then you assume that any heat generated in this resistance heats up the MOSFET. That doesn't make any sense. Think about where this current actually goes. Hint: You have left a couple things out of your schematic that are necessary for the boost converter to work. | |
| Jun 14, 2020 at 16:31 | comment | added | skudo | okay, I already thought that I didn't understand this correctly. Why is the diode&Capacitor needed for these calculations? I don't see the reason for them | |
| Jun 14, 2020 at 16:26 | comment | added | D.A.S. | Too many missing/wrong assumptions, specs. Ron, DCR, Rca needed, missing diodes, caps, layout. try TI.com and create a login to webBench Ps design. | |
| Jun 14, 2020 at 16:11 | review | First posts | |||
| Jun 16, 2020 at 6:30 | |||||
| Jun 14, 2020 at 16:11 | history | asked | skudo | CC BY-SA 4.0 |