Oring control using low voltage device for high voltage DC rack
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United States of America Patent
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Aug 13, 2019
Grant Date -
Jun 14, 2018
app pub date -
Dec 12, 2016
filing date -
Dec 12, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A protection circuits for server racks may include an Oring circuit having a first MOSFET, a first diode, and first and second comparators. Each of the first and second comparators supports a maximum voltage difference that is less than an operational voltage of the power supply. The protection circuit also includes a clamping circuit having a second MOSFET and a second diode. Each of the first and second comparators is configured to compare voltage at the first MOSFET with voltage at the second MOSFET. The first comparator is configured to switch the first MOSFET to an off condition using the comparison, and the second comparator is configured to switch the first MOSFET to an on condition using the comparison. The second MOSFET is configured to clamp a node of each of the first and second comparators to below the maximum in the event of a short at the power supply.
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