I haven't built a DCOI (dual complementary opto-isolator) MOSFET driver in a while.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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Could you get away with using one opto-isolator and on the collector circuit use a pull-up to 5 volts for a high on the gate and low when the opto is on ?
Where can I buy your Arduino nano PWM solar light control?
Thank you, very educational, I actually understood that completely.
Hey Julian, why not using the tlp250 or hpcl3120 opto-fet/igbt drivers instead?
So Julian, this is 1/4 part of the Muppet 2 project, right?
would perfboard with the legs used as wires not have been easier?
Nice video, but better check that the digital I/O is not tristated at boot leaving both opto's on !
Hello Julian,
I was just wondering if these optos can supply the current needed to drive a MOSFET at high frequencies.
I've read the datasheet, the absolute maximum collector current is only 50mA, so the pulsed current can't be more than 100mA. Correct me if I'm wrong.
Thanks.
I alwys use a Dremel clone to cut tracks on pcbs. 😉
I think this is one of your best videos yet. I will definitely be doing this.
You will not be able to drive the mosfet at high frequency with this circuit. Depending on Load (Gate to Source resistance) the max frequency can be very low at most a few kHz not possible to get to hundred’s of kHz that you probably want. You may damage the mosfets if you try to increase the frequency since they will start operating in the non linear region.
Look at the frequency response on that PC817
julian, you should consider adding a resistor/zener in front of the 4 LEDs as a spike in input voltage may cause the output to go boom