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[SOLVED] Build Dead time for Mosfet

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azadfalah

azadfalah

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Hello friends, I hope you're fine

I have a PWM 50hz on CLowSide
I want to turn on MOSFET 2 after than Mosfet 1 turn off, and Turn Off Mosfet 2 before than Mosfet 1 turn on
Is the following schematic correct?
Are they overlapping?

Untitled.png


Thanks
 
Last edited:

You have no dead time. Use another gate driver that includes all options you need, not an obsolete one.
 
thanks for your response
I can not using gate driver like IR2104
Can you guide me to this method By TLP250
 

Here are 2 options for you to implement the dead time generation.

Option 1:
Dead time option 1.png

4 passive components + 1 logic gate IC = 5 components
Drawback: about 8ns (if SNx4HC02 used) of propagation delay due to the buffering of the NOR gates.

Option 2:
Dead time Option 2.png

4 passive components + 2 diodes + 1 logic gate IC = 7 components
Advantage: no propagation delay (assuming ultra fast diode)
Drawback: more components
 
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