A wide input range switching power supply for a circuit protection device includes a rectifier circuit for rectifying an AC line voltage at a supply input, and a switch-mode DC-to-DC converter coupled to the rectifier circuit for providing a low voltage DC power to a load at a supply output. The converter...http://www.google.ca/patents/US6583997?utm_source=gb-gplus-sharePatent US6583997 - Ultra-wide input range switching power supply for circuit protection devices
