Mosfet driver ir2112 circuit high side is not working

[Wasif]

I am working on grid contected inverter for my final project for this I'm making h bridge but low side of mosfet driver is working properly but there is no output on high side can any one help me with this..

Regards
Wasif

 

[kellys_eye]

can any one help me with this..

...yes, we probably can.

 

[Wasif]

Please tell the mistake

 

[Alec_t]

The mistake is that you haven't provided anywhere near enough information. We're not clairvoyant. A schematic would be helpful.

 

[Wasif]

vcc is 12v
vd =5v
cap = 1uf
i am giving pulses to obtain output but Ho is constant 5 v

 

[Alec_t]

Where's the rest of your circuit? HO won't rise to the correct bootstrapped level unless VS gets pulled up by the upper MOSFET. With the circuit as shown I would expect HO to be pulsed at 12V, not a constant 5V.

 

[Minder]

Agree, you need the rest of the H bridge for results.
M.

 

[Wasif]

thanks for clearing me. i have practically try complete bridge but its not working. that's why i want to separately check the mosfet driver what type and value of bootstrap cap you suggest. and what is the difference between ir2112 and ir2110.

 

[Minder]

what is the difference between ir2112 and ir2110.

About 20c

Tahmid's blog: Using the high-low side driver IR2110 - explanation and plenty of example circuits

https://www.silabs.com/tools/Pages/bootstrap-calculator.aspx
M.

 

[Wasif]

I am using low voltage 24v instead of high voltage 320v on mosfets h bridge will be same for both voltage level or you suggest any changes

 

[Wasif]

Thanks for suggesting a wonderful blog It clear my all concepts about mosfet driver. Please tell me one thing That I have mosfet driver ir2112 instead of ir2110 can I use it?

 

[Minder]

There is not alot of difference the ir2110 has a little better output drive current as well as being somewhat faster.
M.

 

[Wasif]

Thanks