Patent ID: 8446050
Filing Date: 2013-05-21
Classification: H02M,H03K

Abstract:
1. A solid-state alternating current (AC) power switch circuit for connection between an AC input and an AC load, the solid-state AC power switch comprising: a first solid-state switch connected to block a first half-cycle of the AC input when OFF, a first bias resistor connected in parallel with the first solid-state switch; a second solid-state switch connected in series with the first solid state switch to block a second half-cycle of the AC input when OFF; a second bias resistor connected in parallel with the second solid-state switch; a zero-cross detector circuit for monitoring the AC input to determine zero-crossings associated with the monitored AC input; a controller for turning ON the first solid-state switch and the second solid-state switch according to a turn-on sequence in which the first transistor is turned ON first during a detected zero-crossing window associated with the first solid-state switch and the second transistor is turned ON subsequently during a detected zero-crossing window of the second solid-state switch.