PHOTO VOLTAGE RELAY

摘要

The power MOSFET is controlled by illuminating a signal photovoltaic generator which produces an output current which charges the gate capacitance of the power MOSFET to turn on the device. A sensing impedance which may be a diode, MOSFET or other component is connected between the photovoltalic generator and the gate of the power MOSFET. The sensing impedance in the disclosed embodiment is a diode. The sensing impedance forces the power MOSFET gate voltage instantaneously to follow the photo-voltalic generator output voltage.