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[jayce3390]

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[kishore2k4]

Re: Driver for MOSFET

Hello,

I am a novice in analog.
Could you tell me if the component EL7457 from intersil is able to drive the IRF7380 from International Rectifier?

I give datasheets in attached files.

It depends on the switching frequency and rise/fall time requirements which depend on the MOSFET to be driven. In this case EL7457 can drive your IRF7380's happily.

 

[FvM]

Driver for MOSFET

If I simply say yes (it's correct without doubt), what's the next question?

 

[jayce3390]

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[kishore2k4]

Re: Driver for MOSFET

Even if there is 70 Volts on the MOSFET drain?

It will work in theory but 70 Volts on a 80 Volt MOSFET is not good for reliability reasons. When you are switching high currents with a fast gate-drive then the MOSFET inductances will cause high voltage spikes and may damage them.

You should consider going through one of the many application notes for MOSFET gate drivers.

 

[FvM]

Re: Driver for MOSFET

When you are switching high currents with a fast gate-drive then the MOSFET inductances will cause high voltage spikes and may damage them.

A modern FET as IRF7380 with integrated zener clamp shouldn't be damaged by voltage spikes.
But depending on the spike energy (respectively leakage inductance level), excessive loses may be observed.

 

[kishore2k4]

Re: Driver for MOSFET

When you are switching high currents with a fast gate-drive then the MOSFET inductances will cause high voltage spikes and may damage them.

A modern FET as IRF7380 with integrated zener clamp shouldn't be damaged by voltage spikes.
But depending on the spike energy (respectively leakage inductance level), excessive loses may be observed.

Thank you for the note. I didn't notice the built-in zener diode clamp.