OVERVOLTAGE PROTECTION CIRCUIT, AND ELECTRONIC APPARATUS USING SAID OVERVOLTAGE PROTECTION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide: an overvoltage protection circuit which enables operation under a proper operating voltage no matter what type of adapter an electronic apparatus is electrically connected to; and an electronic apparatus using the overvoltage protection circuit.;SOLUTION: The overvoltage protection circuit comprises a voltage input terminal, a voltage output terminal, a first selection circuit, and a second selection circuit. When an input voltage is lower than a first reference voltage, an operating voltage is provided to an electronic apparatus directly via the first selection circuit. When the input voltage is higher than the first reference voltage, the operating voltage is provided to the electronic apparatus via the second selection circuit.;COPYRIGHT: (C)2013,JPO&INPIT