IR2110 with parallel MOSFETs

[tux1]

Hello

I'm planning to use parallel MOSFETs to improve the current handling capacity. Can anyone suggest me few tips/documents/circuits to carry out this? I'm driving my MOSFETs using IR2110.

 

[FvM]

The relation between driver current, (total) gate capacitance and switching speed applies for single and multiple transistors as well. In addition, you'll probably use individual gate resistors and for large MOSFETs current booster transistors.

 

[KlausST]

Hi,

look at www.irf.com for application notes.

Good luck

Klaus

 

[tux1]

Thank you

I would like to get some circuits or reference for better understanding.

Regards

 

[tux1]

Hi

I'm just confused if i should have individual drivers associated with each mosfet? Or can i use the gate signal of previous level?

 

[KlausST]

Hi,

I'm just confused if i should have individual drivers associated with each mosfet? Or can i use the gate signal of previous level?

paralleling mosfets with common gate driver increases switching time because of paralleled gate charge...
This causes additional switching loss = heating.

If this is a problem, then you need more driving power, maybe by the use of multiple drivers.

Mind: each fet must have its own gate resistor to mach each other.

Hint: google helps you: search for "international rectifier paralleling mosfets filetypedf"

Klaus

 

[tux1]

Thank you KlausST

That was helpful