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公开(公告)号：US09935560B2
公开(公告)日：2018-04-03
申请号：US14856686
申请日：2015-09-17
Applicant: STMICROELECTRONICS S.r.l.
Inventor： Andrea Agnes , Christian Beia
CPC classification number: H02M7/06 , G05F3/24 , G06F1/266 , H02M3/07 , H02M7/217 , H04L12/10 , H04L12/40045
Abstract: An electronic device includes a rectifier bridge that includes an input configured to be coupled to power over Ethernet (PoE) power sourcing equipment (PSE), and an output. A transistor is configured to selectively couple the output with a load. The electronic device includes a maintain power signature (MPS) device, and a control circuit. The control circuit is to maintain the transistor on when a load current is above a threshold, source current from the rectifier bridge to the MPS device when the load current is below the threshold, and switch the transistor to a diode configuration when the load current is below the threshold.
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Patent Agency Ranking
公开(公告)号：US11646733B2
公开(公告)日：2023-05-09
申请号：US17355427
申请日：2021-06-23
Applicant: STMicroelectronics S.r.l.
Inventor： Andrea Agnes
IPC: H03K17/687 , H02J7/00 , H02M3/158 , H03K17/16
CPC classification number: H03K17/6872 , H02J7/007 , H02M3/158 , H03K17/167
Abstract: In an embodiment, a digital output driver circuit comprises an output stage having first and second transistors. A drive stage is configured to drive control terminals of the first and second transistors and comprising switching circuitry and current generator circuitry. In a first configuration, the driver circuit is configured to connect a control terminal of the second transistor to the reference node to turn off the second transistor; and connect a first capacitance to the current generator circuitry and to a control terminal of the first transistor to turn on the first transistor. In a second configuration, the driver circuit is configured to turn off the first transistor and connect the control terminal of the second transistor to the current generator circuitry and to the second capacitance to turn on the second transistor.
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公开(公告)号：US20210067157A1
公开(公告)日：2021-03-04
申请号：US16983596
申请日：2020-08-03
Applicant: STMicroelectronics S.r.l.
Inventor： Andrea Agnes
IPC: H03K17/687 , H03K17/16 , H02J7/00 , H02M3/158
Abstract: In an embodiment, a digital output driver circuit comprises an output stage having first and second transistors. A drive stage is configured to drive control terminals of the first and second transistors and comprising switching circuitry and current generator circuitry. In a first configuration, the driver circuit is configured to connect a control terminal of the second transistor to the reference node to turn off the second transistor; and connect a first capacitance to the current generator circuitry and to a control terminal of the first transistor to turn on the first transistor. In a second configuration, the driver circuit is configured to turn off the first transistor and connect the control terminal of the second transistor to the current generator circuitry and to the second capacitance to turn on the second transistor.
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公开(公告)号：US10333423B2
公开(公告)日：2019-06-25
申请号：US15940644
申请日：2018-03-29
Applicant: STMicroelectronics S.r.l.
Inventor： Andrea Agnes , Christian Beia
Abstract: An electronic device includes a rectifier bridge that includes an input configured to be coupled to power over Ethernet (PoE) power sourcing equipment (PSE), and an output. A transistor is configured to selectively couple the output with a load. The electronic device includes a maintain power signature (MPS) device, and a control circuit. The control circuit is to maintain the transistor on when a load current is above a threshold, source current from the rectifier bridge to the MPS device when the load current is below the threshold, and switch the transistor to a diode configuration when the load current is below the threshold.
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公开(公告)号：US20210328587A1
公开(公告)日：2021-10-21
申请号：US17355427
申请日：2021-06-23
Applicant: STMicroelectronics S.r.l.
Inventor： Andrea Agnes
IPC: H03K17/687 , H02J7/00 , H02M3/158 , H03K17/16
Abstract: In an embodiment, a digital output driver circuit comprises an output stage having first and second transistors. A drive stage is configured to drive control terminals of the first and second transistors and comprising switching circuitry and current generator circuitry. In a first configuration, the driver circuit is configured to connect a control terminal of the second transistor to the reference node to turn off the second transistor; and connect a first capacitance to the current generator circuitry and to a control terminal of the first transistor to turn on the first transistor. In a second configuration, the driver circuit is configured to turn off the first transistor and connect the control terminal of the second transistor to the current generator circuitry and to the second capacitance to turn on the second transistor.
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公开(公告)号：US11075629B2
公开(公告)日：2021-07-27
申请号：US16983596
申请日：2020-08-03
Applicant: STMicroelectronics S.r.l.
Inventor： Andrea Agnes
IPC: H03K17/687 , H02J7/00 , H02M3/158 , H03K17/16
Abstract: In an embodiment, a digital output driver circuit comprises an output stage having first and second transistors. A drive stage is configured to drive control terminals of the first and second transistors and comprising switching circuitry and current generator circuitry. In a first configuration, the driver circuit is configured to connect a control terminal of the second transistor to the reference node to turn off the second transistor; and connect a first capacitance to the current generator circuitry and to a control terminal of the first transistor to turn on the first transistor. In a second configuration, the driver circuit is configured to turn off the first transistor and connect the control terminal of the second transistor to the current generator circuitry and to the second capacitance to turn on the second transistor.
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