Mosfet driver not outputing properly

[MrHeckles]

Hi guys. I have constructed this circuit.

Everything seems to work as expected, except for one small problem. The high output of both the IR2184 drivers is not high enough.

I ran into this problem with an earlier circuit (also posted) and was helped to solve it by decoupling the driver between Vcc and Ground. However this has not fixed the problem in this case.

The low output is fine, and is turning on the lowside mosfets well. However the high output is only putting out about 1v to the highside mosfet gates.

The PWM generator is running at about 25kHz.

Any suggestions?

Please.

 

[audioguru2]

EEK! A fuzzy Jpg. Please attach schematics as clear GIF or PNG file types.

The Vb pins are dynamic and opposite each other. Download this pic to be clearer. This way should work:

View attachment 38094

 

[MrHeckles]

Heh heh, okay no more fuzzies from me.

Thanks audioguru I'll give it a try.

BTW, where in Canada do you reside?

 

[audioguru2]

I live here somewhere:

View attachment 38096

 

[MrHeckles]

On a boat?

 

[audioguru2]

On a boat?

I'm joking.
My wifey and I frequently go to the walkway there to walk our dog. Some of the boats are huge and very expensive. ;D

 

[MrHeckles]

Super yachts aye?

Made the changes you suggested. Works a treat now.

Many thanks

 

[audioguru2]

Horray, you fixed it! ;D

View attachment 38098