CCS demo 45 day limit

[rxpu99]

I have certainly an ldo a pole compensated RC filter at input and pole compensated RC filter at its output. The main problem is the coupling in the industrial environment. You may have also very high amounts of magnetic coupling/noise in the air. You can shield it but it has limitations. The main problem is if you have a noise coupling from the air (not from the input side) you feel safe if this 0.5V coupling adds over 4V supply plus or minus, so you are in the safe region.

I plan to supply 4V to an MCU that is capable of working between 2.5V and 5V.

In this case if any coupling on my input pins does not exceed 1V, my mcu is in the safe region.

My big concern is not the input LDO, but the mosfet driver, because in half bridge there exists a inductive coupling on the center of the bridge and it can reflect to the mcu side. The worst case is not the additive coupling because this can be clipped by the protection diodes, the worst case is the subtractive effect where the trigger pulse of the mosfet could be pulled down so that it triggers false. Pulling down the 5V rail downwards is much harder than the 3.3V line.


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rxpu99,
This is not a general electronics board. Please take
your discussion to edaboard.com or another forum.
This forum is for the CCS C compiler. Asking a question
about the CCS demo is not an entrée to create a large
thread about your hardware design.

- Forum Moderator
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