What optocoupler can I use to drive a IRF840 Mosfet for LED lights?

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SUMMARY

The discussion focuses on using an optocoupler to drive an IRF840 MOSFET for controlling 220VDC LED lights. The IRF840 is confirmed to be suitable for this application, as it can handle a maximum Source-Drain voltage of 500V. It is emphasized that while an optocoupler can be used, one must ensure that the output specifications of the optocoupler are compatible with the load voltage. Relevant datasheets and application notes are recommended for further guidance.

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  • Understanding of MOSFET operation, specifically the IRF840 model
  • Knowledge of optocoupler functionality and specifications
  • Familiarity with high-voltage DC circuits
  • Ability to read and interpret electronic datasheets
NEXT STEPS
  • Research suitable optocouplers for high-voltage applications
  • Review the IRF840 datasheet for detailed specifications and application notes
  • Learn about designing circuits with optocouplers and MOSFETs
  • Explore safety measures for working with 220VDC circuits
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Electronics enthusiasts, hobbyists, and engineers looking to control high-voltage LED lighting using MOSFETs and optocouplers.

Bartleboom
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Good Morning,
I'm new to electronics. I'm looking for an optocoupler to drive a Mosfet (IRF840). The load is a 220VDC 2A LED lights. It should work like a switch.
Can I use an optocoupler with transistor output? I think I can't because the max voltage between emittor and collector is 70V and my load is 220VDC.
If you have some links or schematic where I can find infos please help me.

Thanks a lot.

Nello
 
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Bartleboom, Welcome to Physics Forums!

Yes, you can use the IRF840 as your switch. Note that Mosfets have three teriminals named Source, Drain, and Gate. The IRF840 is rated to withstand a Maximum of 500 Volts Source-Drain potential difference. If you Google this part number you will find plenty of data sheets in pdf format. Check their applications notes on their last pages for examples.

Sure, you can use an optocoupler to drive the Mosfet. Good idea!

See: www.irf.com/technical-info/appnotes/an-937.pdf
 
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