Timeline for MOSFET driver blows out in half-bridge DC motor PWM controller
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
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| Oct 18, 2023 at 16:41 | history | edited | JYelton | CC BY-SA 4.0 |
Removed stuff that's better suited for a forum (this is not a forum)
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| Jun 4, 2023 at 13:27 | history | edited | winny | CC BY-SA 4.0 |
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| Jun 4, 2023 at 13:10 | answer | added | Solmyr999 | timeline score: 1 | |
| Apr 16, 2023 at 12:24 | comment | added | greybeard | The power side of your late addition schematic urgently needs a GND connection. (I'd find an additional polarity indication reassuring with "your batteries".) | |
| Apr 16, 2023 at 12:20 | history | edited | Solmyr999 | CC BY-SA 4.0 |
added 1055 characters in body
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| Apr 15, 2023 at 16:11 | vote | accept | Solmyr999 | ||
| Apr 15, 2023 at 11:26 | comment | added | winny | Please not that 100 % duty cycle will not be possible with a bootstrap. Actual limit depends on several things, but if you need above say 90 %, you need a dedicated floating supply for your high side MOSFET. Having your driver on a perf board with cable connections to your MOSFETs is simply not going to work. You need a dedicated PCB with strong ground plane and very short traces. | |
| Apr 15, 2023 at 11:22 | history | edited | winny | CC BY-SA 4.0 |
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| Apr 15, 2023 at 8:47 | answer | added | Edin Fifić | timeline score: 4 | |
| Apr 15, 2023 at 8:46 | comment | added | Solmyr999 | @EdinFifić Thank you for your time! I've redone my MOSFET schematic because I screwed it the first time (please check my edit). It now represents my actual layout. | |
| Apr 15, 2023 at 8:41 | comment | added | Edin Fifić | @Solmyr999 I am preparing my answer, took me a long time, will post it now, but I have more to add, so come back around to check it. I will let you know here when it's completed, but at least you will have most of the answer now. | |
| Apr 15, 2023 at 8:38 | history | edited | Solmyr999 | CC BY-SA 4.0 |
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| Apr 15, 2023 at 8:23 | comment | added | Solmyr999 | I noticed the fet heatsinks getting slightly warm but I thought this might be normal for them to heat up. So, do you think the driver blowing up might be due to me wanting to reach 100% duty cycle ? | |
| Apr 14, 2023 at 20:12 | comment | added | Bryan | Thank you for choosing a mosfet driver with built in dead time, however be mindful that this configuration requires the duty cycle never hit 100% or the high side bootstrap supply will become discharged and the high side fet will not be fully enhanced. With typical layouts this would blow the high side fet, however your layout is different and may survive. | |
| Apr 14, 2023 at 17:03 | comment | added | jsotola | the battery symbol does not match the polarity labels in the schematic diagram ... the long bar is the positive end of the battery | |
| Apr 14, 2023 at 16:59 | comment | added | arnisz | "Drive Mosfet" is reverse polarity. The other is correct. At least if you only look at drain and source. Otherwise strange orientation of the polarities. Deviating from norms and conventions leads to irritation and error. | |
| Apr 14, 2023 at 16:17 | answer | added | Andy aka | timeline score: 1 | |
| Apr 14, 2023 at 16:09 | history | asked | Solmyr999 | CC BY-SA 4.0 |