Mosfet driver IR2104 High out not working

[Alec_t]

Unless the source of the high-side MOSFET is toggled high and low, the bootstrap circuit won't function properly to drive the gate 12V above the source. Is the source toggling?

 

[muhammad anees]

vcc=12v, f=20khz, 1n4007 diode, what to do now?? mean to say what value of capacirtor should we use with 8 and 6 pin

 

[Minder]

Value calculator.
http://www.silabs.com/support/Pages/bootstrap-calculator.aspx
M.

 

[muhammad anees]

thanks i will try, and inform you soon.

 

[muhammad anees]

is there any guy whose use ir2104 for above conditions?? correct value oc Cb??

 

[Maglatron]

Maybe try to get to grips with LTSpice too and download the zzz library http://bordodynov.ltwiki.org/ you can run circuit simulations, it's very good!

 

[Maglatron]

also include deadtime to avoid shoot through

 

[Harald Kapp]

@Maglatron : Old thread from 2016 -> closed