公开(公告)号：US12062913B2

公开(公告)日：2024-08-13

申请号：US17874840

申请日：2022-07-27

申请人： SANYO DENKI CO., LTD.

发明人： Takashi Kataoka ,  Noriaki Kasuga ,  Masaki Miyashita

IPC分类号： H02J3/00 ,  G01R19/165 ,  G01R19/22 ,  G01R19/252

CPC分类号： H02J3/0012 ,  G01R19/16547 ,  G01R19/16571 ,  G01R19/22 ,  G01R19/252

摘要： An input power monitoring circuit includes a rectifier circuit, a divided voltage generator circuit, a divided voltage comparator circuit, a switching circuit, and a computing device. The divided voltage comparator circuit is configured in such a manner that polarity of an output signal that is outputted from a first comparator upon a first rectified divided voltage exceeding a first comparison voltage is opposite to polarity of an output signal that is outputted from a second comparator upon a second rectified divided voltage exceeding a second comparison voltage. Output terminals of the first and second comparators are connected to each other. A connection point between the output terminals of the first and second comparators is connected to an input terminal of the switching circuit. The computing device measures frequency of a pulse signal outputted from the switching circuit, and determines the voltage state of input power based on the measured frequency.