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so what to do now ?it should be working at any pulse duration.This type of "hi side" driver can not be on 100"% of the time. Start off at 50% to see if it is working.
I think 90 to 95% of the time is maximum.
You need to replace the bootstrap circuit with an active voltage multiplier. A Villard Cascade etc.so what to do now ?it should be working at any pulse duration.
That driver way never built for 100%.so what to do now ?it should be working at any pulse duration.
pwm will be changed from 0-90% with constant frequency 100KhzWhat you have will do: all the time off through 90% on. It will not reach all the time on.
What frequency will you be running? See MrT's pictures.
What voltage? What current? Is the load inductive or resistive?
It makes a difference.
You said "it should be working at any pulse duration."but i didn't mention that i need 100% of duty cycle .
In MrT's last picture (100%) "there is no pulses" and in his first picture (0%) there is no pulses.but i didn't mention that i need 100% of duty cycle . i need portion of duty , the problem is that the output was 100% , there were not pulses
It should work fine from 0-90%.pwm will be changed from 0-90% with constant frequency 100Khz
the load for now is resistive i will upgrade to full buck converter
input voltage is ranging from 14-17 v