IR2110 High side floating supply offset voltage

[ultrasonic]

Hello,

I am using this chip for driving IGBT's. It's datasheet, High side floating supply offset voltage is 500V max. Is it possible to feed IGT's with 700Vdc, or not? I couldnt understand the effect of IGBT's supply voltage on this chip.

Thanks.

 

[alexan_e]

The chip has to generate a gate voltage (using bootstrapping) that is higher than the supply of the high side element, if you apply 700v then Vb will have to become 700v+ which is over the max rating

Alex

 

[ultrasonic]

The chip has to generate a gate voltage (using bootstrapping) that is higher than the supply of the high side element, if you apply 700v then Vb will have to become 700v+ which is over the max rating

Alex

so what can I do for amplftying output voltage? Briefly, I have 300Vpp signal at the output of H-bridge based on IR2110 and IGBTs. I want to get 450V-500V signal. I dont prefer to add a step-up transformer to the output, because I dont know anything of it, and also nobody around me to design it for me. Than I tried to increase IGBT's supply voltage to increase output voltage. But it seems impossible with this bootstrapping, sweety,sometimes lazy,sometimes crazy chip :'(

 

[mtwieg]

They make other versions that are rated up to 1200V, such as the IR2213.

 

[alexan_e]

IR2113 can work with 600v, will this suite you?

 

[ultrasonic]

They make other versions that are rated up to 1200V, such as the IR2213.

thanks for reply. I will look for it in my town.