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公开(公告)号：US09793709B2
公开(公告)日：2017-10-17
申请号：US14497062
申请日：2014-09-25
申请人： The Boeing Company
发明人： Gregory H. Smith , Son T. Vo , Kenneth A. Seidner , Troy Cobb , Shamoon Sikora
CPC分类号： H02H11/00 , H02H3/105 , H02M1/32 , H02M3/156 , H02M2001/0009
摘要： Embodiments described herein provide short circuit detection capabilities for current drivers. One embodiment includes a controller and a current driver. The current driver includes a power switch circuit that couples a supply rail to a high side of a load in response to receiving a drive signal. The current driver further includes a continuity circuit that couples the supply rail to the high side and indicates to the controller whether a first current flow to the high side exceeds a first threshold. The current driver further includes a current sense circuit that couples a low side of the load to ground and indicates to the controller whether a second current flow from the low side exceeds a second threshold. The controller identifies, based on the first current flow, the second current flow, and the drive signal, a plurality of short circuit conditions that may exist at the current driver.
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公开(公告)号：US20160094025A1
公开(公告)日：2016-03-31
申请号：US14497062
申请日：2014-09-25
申请人： The Boeing Company
发明人： Gregory H. Smith , Son T. Vo , Kenneth A. Seidner , Troy Cobb , Shamoon Sikora
CPC分类号： H02H11/00 , H02H3/105 , H02M1/32 , H02M3/156 , H02M2001/0009
摘要： Embodiments described herein provide short circuit detection capabilities for current drivers. One embodiment includes a controller and a current driver. The current driver includes a power switch circuit that couples a supply rail to a high side of a load in response to receiving a drive signal. The current driver further includes a continuity circuit that couples the supply rail to the high side and indicates to the controller whether a first current flow to the high side exceeds a first threshold. The current driver further includes a current sense circuit that couples a low side of the load to ground and indicates to the controller whether a second current flow from the low side exceeds a second threshold. The controller identifies, based on the first current flow, the second current flow, and the drive signal, a plurality of short circuit conditions that may exist at the current driver.
摘要翻译： 本文描述的实施例提供了用于当前驱动器的短路检测能力。 一个实施例包括控制器和当前驱动器。 电流驱动器包括电源开关电路，其响应于接收驱动信号将电源轨耦合到负载的高侧。 电流驱动器还包括连接电路，其将供电轨耦合到高侧，并向控制器指示到高侧的第一电流是否超过第一阈值。 电流驱动器还包括电流感测电路，其将负载的低侧耦合到地，并向控制器指示来自低侧的第二电流是否超过第二阈值。 控制器基于第一电流来识别可能存在于当前驱动器上的多个短路状况的第二电流和驱动信号。
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公开(公告)号：US11309880B2
公开(公告)日：2022-04-19
申请号：US15849648
申请日：2017-12-20
申请人： The Boeing Company
IPC分类号： H03K17/082 , H02H3/10 , F41G7/00 , F42C15/40 , F42D1/05
摘要： Embodiments described herein provides a low-complexity solution and current protection for a current driver that provide current pulses to pyrotechnic initiators. The current drivers include current limiters that prevent high current transients during a current pulse. Further, a duration of the current pulse is controlled based on a thermal limit of the current driver to prevent thermal damage to the current driver. One embodiment comprises an apparatus that includes a control circuit and a current driver. The current driver is electrically couplable to a pyrotechnic initiator. The current driver includes a power switch circuit electrically coupled to a supply rail that supplies a current to a high side of the pyrotechnic initiator in response to receiving a drive signal from the control circuit.
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公开(公告)号：US20190190510A1
公开(公告)日：2019-06-20
申请号：US15849648
申请日：2017-12-20
申请人： The Boeing Company
IPC分类号： H03K17/082 , H02H3/10 , F41G7/00 , F42C15/40 , F42D1/05
CPC分类号： H03K17/0822 , F41G7/007 , F42C15/40 , F42D1/05 , H02H3/105
摘要： Embodiments described herein provides a low-complexity solution and current protection for a current driver that provide current pulses to pyrotechnic initiators. The current drivers include current limiters that prevent high current transients during a current pulse. Further, a duration of the current pulse is controlled based on a thermal limit of the current driver to prevent thermal damage to the current driver. One embodiment comprises an apparatus that includes a control circuit and a current driver. The current driver is electrically couplable to a pyrotechnic initiator. The current driver includes a power switch circuit electrically coupled to a supply rail that supplies a current to a high side of the pyrotechnic initiator in response to receiving a drive signal from the control circuit.
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