| 摘要 |
PROBLEM TO BE SOLVED: To provide an overvoltage protection circuit for output power supply, which prevents overcurrent from flowing even when some resistors are broken. SOLUTION: This overvoltage protection circuit includes: a shunt regulator 103 formed by connecting a cathode with an output terminal of a rectification circuit 106 and connecting an anode to ground; a plurality of first resistors R1, R2 connected to the cathode and a reference of the shunt regulator 103 in parallel; and a plurality of second resistors R3, R4 connected to the anode and the reference of the shunt regulator 103 in parallel and connected to the first resistors R1, R2 in series. COPYRIGHT: (C)2009,JPO&INPIT
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