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Mosfet driver ir2112 circuit high side is not working

Wasif

Sep 29, 2017
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Sep 29, 2017
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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
 

Alec_t

Jul 7, 2015
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The mistake is that you haven't provided anywhere near enough information. We're not clairvoyant. A schematic would be helpful.
 

Wasif

Sep 29, 2017
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Sep 29, 2017
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vcc is 12v
vd =5v
cap = 1uf
i am giving pulses to obtain output but Ho is constant 5 v

upload_2017-9-29_22-8-42.png
 

Alec_t

Jul 7, 2015
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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

Apr 24, 2015
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Agree, you need the rest of the H bridge for results.
M.
 

Wasif

Sep 29, 2017
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Sep 29, 2017
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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.
 

Wasif

Sep 29, 2017
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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

Sep 29, 2017
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Sep 29, 2017
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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

Apr 24, 2015
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There is not alot of difference the ir2110 has a little better output drive current as well as being somewhat faster.
M.
 
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