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11. 发明申请

US20110216448A1 OVERCURRENT PROTECTION CIRCUIT 有权
标题翻译：过流保护电路
公开(公告)号：US20110216448A1
公开(公告)日：2011-09-08
申请号：US13033984
申请日：2011-02-24
申请人： Takeyoshi HISADA , Nobutomo Takagi , Shigekazu Sugimoto , Fukuo Ishikawa
发明人： Takeyoshi HISADA , Nobutomo Takagi , Shigekazu Sugimoto , Fukuo Ishikawa
IPC分类号： H02H9/02
CPC分类号： H02H9/02
摘要： An overcurrent protection circuit includes a load driver for driving a load, a controller for turning ON and OFF the load driver, a current sensor for measuring a load current flowing through the load, and an add/subtract circuit for performing both an addition operation and a subtraction operation on a previous calculation result or for performing only the subtraction operation on the previous calculation result so as to produce a present calculation result. The addition operation uses an added value depending on the presently measured current. The subtraction operation uses a subtracted value depending on the presently measured current. The controller turns OFF the load driver, when the present calculation result of the add/subtract circuit exceeds a predetermined determination value.
摘要翻译：过电流保护电路包括用于驱动负载的负载驱动器，用于接通和断开负载驱动器的控制器，用于测量流过负载的负载电流的电流传感器，以及用于执行加法运算和加法运算的加/减电路，对先前的计算结果进行减法运算，或仅针对先前计算结果执行减法运算，以产生当前计算结果。添加操作根据当前测量的电流使用附加值。减法运算根据当前测量的电流使用减法值。当加法/减法电路的当前计算结果超过预定的确定值时，控制器关闭负载驱动器。

12. 发明授权

US08315027B2 Switch circuit having overcurrent detection function 有权
标题翻译：开关电路具有过流检测功能
公开(公告)号：US08315027B2
公开(公告)日：2012-11-20
申请号：US12911096
申请日：2010-10-25
申请人： Shigekazu Sugimoto , Kazunori Ozawa , Koichi Watanabe
发明人： Shigekazu Sugimoto , Kazunori Ozawa , Koichi Watanabe
IPC分类号： H02H3/08 , H02H9/02
CPC分类号： H03K17/0822 , H03K2217/0063
摘要： A first overcurrent detecting circuit outputs a first time-up signal when a time period, in which an electric current flowing into the wire harness is greater than the first threshold, reaches a first duration time, which corresponds to a first threshold. A second overcurrent detecting circuit outputs a second time-up signal when a time period, in which an electric current flowing into the wire harness is greater than the second threshold, reaches a second duration time, which corresponds to a second threshold. The second threshold is less than the first threshold. The second duration time is longer than the first duration time. A determination circuit determines that an overcurrent flows into the wire harness and cause a control circuit to deactivate the switching element when inputting at least one of the first and second time-up signals.
摘要翻译：当流入线束的电流大于第一阈值的时间段达到对应于第一阈值的第一持续时间时，第一过电流检测电路输出第一时间上升信号。当流入线束的电流大于第二阈值的时间段达到对应于第二阈值的第二持续时间时，第二过电流检测电路输出第二时间上升信号。第二阈值小于第一阈值。第二个持续时间比第一个持续时间长。确定电路确定当输入第一和第二时间信号中的至少一个时，过电流流入线束并使控制电路停用开关元件。

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