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optocouple suggestion?

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qwertyqwq

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salut a tout !

I'm looking for a optocoupler ,which can turn on and turn of about 30kHz . There will be a mosfet at its output. Opto's supply voltage will around 12-24V. Also switching signal is from opamp's output, so signal current will be low. Any suggestion please ???
 
yes, switching time is 0.5uS which would be usable up to about 500khz
 
That MOSFET has a large gate input capacitance of 12,000pF and requires the transfer of 236nC of charge to turn it on and off, so you will need a low-impedance gate driver at the output of the opto to operate at 30kHz.
For example,, to achieve a rise/fall time of 1us will require a driver that can source and sink 230mA of current during that transition time.
 
That MOSFET has a large gate input capacitance of 12,000pF and requires the transfer of 236nC of charge to turn it on and off, so you will need a low-impedance gate driver at the output of the opto to operate at 30kHz.
For example,, to achieve a rise/fall time of 1us will require a driver that can source and sink 230mA of current during that transition time.


Hmm.
What about a mosfet driver like a ir2110 for output of the optocoupler ?
 
What about a mosfet driver like a ir2110 for output of the optocoupler ?
That should work, but it is both a high-side and low-side driver.
You might be able to find a cheaper low-side only driver.
 
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