Power supply equipped with an independent overload protection mechanism

摘要

A power supply equipped with an independent overload protection mechanism includes a transformation circuit which consists of a plurality of transformers for transforming AC power to DC power. Each transformer has a front end connecting to a power switch. All the power switches are connected to a pulse-width modulation (PWM) controller. Each power switch and the PWM controller are bridged by a switch circuit which is electrically connected to a protection circuit to monitor whether an electronic device is overloaded. In the overload condition, the protection circuit outputs a protection signal to the switch circuit to stop or suspend the DC power cord from delivering electric power to drive the electronic device at the rear end. Hence an independent overload protection can be achieved.