Help with MOSFET H-bridge

[Haris Shafiq]

I've designed an H-bridge circuit
(https://obrazki.elektroda.pl/4652666800_1375483001.jpg),

kindly help me out if it has any errors?

Q: someone told me to put boost capacitor between gate and source of high side mosfet when u r running high voltage motor, e.g; 48 volts.

Q: some values are not known by me, so if anyone of u can guide it will be much appreciable.

Q: also, if this circuit has any errors, kindly tell me because I've made this type of circuit for the first time and i don't want to burn any hardware before confirming that it's circuit is OK.

thanks.

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http://obrazki.elektroda.pl/9824587900_1375483000.jpg

its another image of circuit, sorry for the bad image quality, i havnt got any good camera :lol:

 

[Tahmid]

Don't put any capacitor between the gate and source of the MOSFET.

You seem to have shorted VB and VS. Remove the short.

Put gate resistors between the IR2110 gate-drive-outputs and the MOSFET gates.

Put 1k resistors between gate and source of each MOSFET.

Remove the resistors and capacitors between the opto-coupler emitter and the gates.

For further information/ideas regarding the IR2110, refer to this: https://tahmidmc.blogspot.com/2013/01/using-high-low-side-driver-ir2110-with.html

Hope this helps.
Tahmid.

 

[Haris Shafiq]

Don't put any capacitor between the gate and source of the MOSFET.

You seem to have shorted VB and VS. Remove the short.

Put gate resistors between the IR2110 gate-drive-outputs and the MOSFET gates.

Put 1k resistors between gate and source of each MOSFET.

Remove the resistors and capacitors between the opto-coupler emitter and the gates.

For further information/ideas regarding the IR2110, refer to this: https://tahmidmc.blogspot.com/2013/01/using-high-low-side-driver-ir2110-with.html

Hope this helps.
Tahmid.

Thanks Tahmid for the reply, but i used resistor and capacitor combination at optocoupler emitter as low pass filter, so that i can prevent shoot thru in the circuit, and shimitt trigger to make it discrete again, is it wrong?

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Vb and Vs are connected the same way as they are connected in your blog, am i missing something?