发明申请
- 专利标题： POWER SOURCE VOLTAGE PROTECTIVE DEVICE AND POWER SOURCE VOLTAGE PROTECTION METHOD
- 专利标题（中）： 电源电压保护装置和电源电压保护方法
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申请号： US13075340申请日： 2011-03-30
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公开(公告)号： US20110242709A1公开(公告)日： 2011-10-06
- 发明人: Atsushi Ikeda , Nobuchika Ochi
- 申请人： Atsushi Ikeda , Nobuchika Ochi
- 申请人地址： JP Tokyo
- 专利权人： HONDA MOTOR CO., LTD.
- 当前专利权人： HONDA MOTOR CO., LTD.
- 当前专利权人地址： JP Tokyo
- 优先权： JP2010-081178 20100331
- 主分类号： H02H9/00
- IPC分类号： H02H9/00
摘要：
A microcomputer 10 is equipped with a CPU 13 and an AD converter 15. The AD converter 15 is supplied with the same power source voltage as the CPU 13, and converts a reference voltage Vref into digital data using the received power source voltage and outputs the digital data as a conversion value. The CPU 13 detects a state of the power source voltage by calculating a voltage variation of a power source voltage for ordinary operation on the basis of a first conversion value obtained by AD-converting the reference voltage Vref by the AD converter 15 in a state that a standard power source voltage Vcc including no voltage variation is supplied to the AD converter 15 and a second conversion value obtained by AD-converting the reference voltage Vref by the AD converter 15 in a state that the power source voltage for ordinary operation is supplied to the AD converter 15.
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