I'm designing a SMPS where the switch is a MOSFET. I want to isolate the gate of the mosfet from its control circuitry, so I started looking into gate drive optocouplers.
The problem is that I only have a 5V supply available to me, and all of the gate drive optocoupler IC's datasheets suggest using 10 - 15 V for Vcc. What will happen if I power it with only 5?
My guess would be that the switching times are slower. This would be OK since my SMPS isn't that advanced...it only switches at about 4kHz.
Any comments would be appreciated, thanks!