Smart electronic switch
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United States of America Patent
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Jan 31, 2023
Grant Date -
Mar 18, 2021
app pub date -
Sep 17, 2020
filing date -
Sep 18, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
An electronic fuse circuit includes an electronic switch with a load current path coupled between an output node and a supply node and that connects or disconnects the output node and the supply node in accordance with a drive signal. The circuit includes a control circuit to generate the drive signal based on an input signal. A monitoring circuit is included in the control circuit to receive a current sense signal representing the load current passing through the load current path and to determine a first protection signal based on the current sense signal and a wire parameter. The first protection signal is indicative of whether to disconnect the output node from supply node. The control circuit changes from normal mode to idle mode when the load current is below a given current threshold and another criterion is fulfilled.
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