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Because Those resitors and diodes bias the transistors with some initial current flow. So there is a current flow in transistors - because they are initialy biased and in bias circuit (resistors and diodes) - because diodes are polarized in forward direction. When you apply signal change between...
Thanks for all useful tips. I made some changes to my design. Klaus, i did how you said, now my drivers are closer to the mosfets pins. About those resistors i would like to stay with them for now. Maybe in case when i wouldn't need them i could just repleace them with good quality low esl smd...
**broken link removed** this is the link. Yeee i think you may be right. They have a bit different scenario with two different grounds on the chip. The power ground is connected directed to the power ground plane. I missed it. So i will include the switch driver to the power ground. Than...
Thanks, I made some modifications to my project according to your tips and informations that i found in some TI motor power stages design application.
I have few questions. First, is it correct way to split ground in the way that I did it? I have one small connection between power ground and...
High side mosfet driver blows up
I checked that there is no output from the high side output of the controller. After that i replaced controller IC and it worked again. In provious revision i had 100ohm of bootstrap resistor and result was exactly the same. However does it have any meaning ? I...
Hello everyone
I'm playing with some kind of 3 phase motor controller and i have issue with high side mosfet driver. My circuit seems to work well until HV voltage rail will be increased to some level.
When it reaches about 150V the high side drivers are blowing up. I made a tests with no...
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