I'm trying to work out a way to switch between two sets of MOSFETs driven by a single SMPS controller.
I've looked at MOSFET drivers and analog switches, but haven't found anything that can do it. One problem is there can't be much additional impedance inline with the gate drivers. Also, there's an amount of current demand involved.
The inactive MOSFETs have to be isolated from the driver so I need a switch that floats both sides similar to a relay. The switches need to be transparent to the gate drivers. I don't want to use an actual relay for size and reliability considerations.
With no power or ground reference, I don't know of a way to bias a transistor so I'm stuck there. Is there a relatively simple circuit that will allow me to emulate a relay in a manner that both sides of the switch float?
I've looked at MOSFET drivers and analog switches, but haven't found anything that can do it. One problem is there can't be much additional impedance inline with the gate drivers. Also, there's an amount of current demand involved.
The inactive MOSFETs have to be isolated from the driver so I need a switch that floats both sides similar to a relay. The switches need to be transparent to the gate drivers. I don't want to use an actual relay for size and reliability considerations.
With no power or ground reference, I don't know of a way to bias a transistor so I'm stuck there. Is there a relatively simple circuit that will allow me to emulate a relay in a manner that both sides of the switch float?