Hi All,
I am looking to a control method which switches Gallium Nitride devices when the voltage across the FET reaches zero. I need therefore to sample the voltage across the FET switches and pass it to my DSP. There are some issues - the voltage across the switch can be up to 600V, and my DSP must be isolated. I wondered, what is the best way to do this? My topology is an active clamp flyback. I was thinking a simple capacative divider followed by a digital isolator, with the hot side connected to the HV and the other connecting the DSP low voltage singal.
Frequency is above 200kHz - will this affect the best solution at all?
Is there a better way?
I am looking to a control method which switches Gallium Nitride devices when the voltage across the FET reaches zero. I need therefore to sample the voltage across the FET switches and pass it to my DSP. There are some issues - the voltage across the switch can be up to 600V, and my DSP must be isolated. I wondered, what is the best way to do this? My topology is an active clamp flyback. I was thinking a simple capacative divider followed by a digital isolator, with the hot side connected to the HV and the other connecting the DSP low voltage singal.
Frequency is above 200kHz - will this affect the best solution at all?
Is there a better way?