High line tolerant power conversion device comprising an internal switch for the protection of sub-devices

摘要

A power conversion device (10) rectifies a mains voltage to produce a dc voltage and places the dc voltage on a bus (18). The bus is coupled to an output converter (24) and has a switch (32). The bus voltage is monitored using voltage sensing circuitry (36) and determining whether the voltage on the bus exceeds a threshold. If the voltage exceeds a threshold, the switch is turned off in order to protect downstream devices.