ajw22
Member
- Joined
- Nov 16, 2018
- Messages
- 733
Could it be that the MOSFET was overheating when the opto was Off?
The opto reverse max voltage is about 6V, so if you apply 12V, it cannot block the too high voltage and let current through until the MOSFET gate is at 6V.
This MOSFET at 6V is only partially On, so would heat up.
Not entirely sure about all this reverse bias stuff... it's generally best avoided.
The opto reverse max voltage is about 6V, so if you apply 12V, it cannot block the too high voltage and let current through until the MOSFET gate is at 6V.
This MOSFET at 6V is only partially On, so would heat up.
Not entirely sure about all this reverse bias stuff... it's generally best avoided.