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公开(公告)号：US12184195B2
公开(公告)日：2024-12-31
申请号：US17736668
申请日：2022-05-04
Applicant: STMICROELECTRONICS LTD
Inventor： Laurent Gonthier
Abstract: The present description concerns a converter comprising an AC-DC conversion stage comprising a first thyristor, a first power supply circuit delivering a first reference voltage between a first node and a second node, and a second power supply circuit delivering a second reference voltage between third and fourth nodes, the cathode of the first thyristor being coupled to the first node of the first power supply circuit by a first switch and being connected to the fourth node, the second power supply circuit comprising a first rectifying element coupled to the second node of the first power supply circuit and coupled to the third node.
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公开(公告)号：US11228239B2
公开(公告)日：2022-01-18
申请号：US16858907
申请日：2020-04-27
Applicant: STMicroelectronics (Tours) SAS , STMicroelectronics LTD
Inventor： Ghafour Benabdelaziz , Laurent Gonthier
Abstract: An AC capacitor is coupled to a totem-pole type PFC circuit. In response to detection of a power input disconnection, the PFC circuit is controlled to discharge the AC capacitor. The PFC circuit includes a resistor and a first MOSFET and a second MOSFET coupled in series between DC output nodes with a common node coupled to the AC capacitor. When the disconnection event is detected, one of the first and second MOSFETs is turned on to discharge the AC capacitor with a current flowing through the resistor and the turned on MOSFET. Furthermore, a thyristor may be simultaneously turned on, with the discharge current flowing through a series coupling of the MOSFET, resistor and thyristor. Disconnection is detected by detecting a zero-crossing failure of an AC power input voltage or lack of input voltage decrease or input current increase in response to MOSFET turn on for a DC input.
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公开(公告)号：US10483869B1
公开(公告)日：2019-11-19
申请号：US16035069
申请日：2018-07-13
Applicant: STMICROELECTRONICS LTD
Inventor： Laurent Gonthier , Kimi Lu , Jack Wang
Abstract: Embodiments are directed to power conversion circuits including a bypass circuit for bypassing an inrush current limiting resistor. In one embodiment, a power conversion circuit is provided that includes a bridge rectifier, a current limiting resistor, a controllable current switching device, and a driver. The current limiting resistor has a first terminal coupled to an output terminal of the bridge rectifier and a second terminal coupled to an electrical ground. The controllable current switching device has conduction terminals coupled in parallel with respect to the current limiting resistor. The driver is coupled between the first terminal of the current limiting resistor and a control terminal of the current switching device, and the driver controls an operation of the current switching device based on a current through the current limiting resistor.
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Patent Agency Ranking
公开(公告)号：US11936288B2
公开(公告)日：2024-03-19
申请号：US17548754
申请日：2021-12-13
Applicant: STMicroelectronics (Tours) SAS , STMicroelectronics LTD
Inventor： Ghafour Benabdelaziz , Laurent Gonthier
CPC classification number: H02M1/4208 , H02M7/1557 , H02M7/217 , H02M1/322
Abstract: An AC capacitor is coupled to a totem-pole type PFC circuit. In response to detection of a power input disconnection, the PFC circuit is controlled to discharge the AC capacitor. The PFC circuit includes a resistor and a first MOSFET and a second MOSFET coupled in series between DC output nodes with a common node coupled to the AC capacitor. When the disconnection event is detected, one of the first and second MOSFETs is turned on to discharge the AC capacitor with a current flowing through the resistor and the turned on MOSFET. Furthermore, a thyristor may be simultaneously turned on, with the discharge current flowing through a series coupling of the MOSFET, resistor and thyristor. Disconnection is detected by detecting a zero-crossing failure of an AC power input voltage or lack of input voltage decrease or input current increase in response to MOSFET turn on for a DC input.
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公开(公告)号：US11515805B2
公开(公告)日：2022-11-29
申请号：US17148246
申请日：2021-01-13
Applicant: STMicroelectronics LTD
Inventor： Laurent Gonthier
Abstract: A capacitive element has its terminals coupled together by two thyristors electrically in antiparallel. The discharge of the capacitive element is controlled by the application of a gate current to one thyristor of the two thyristors which is in a reverse-biased state in response to a voltage stored across the terminals of the capacitive element. The reverse-biased thyristor responds to the applied gate current by passing a leakage current to discharge the stored voltage.
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公开(公告)号：US11271493B2
公开(公告)日：2022-03-08
申请号：US16897672
申请日：2020-06-10
Applicant: STMicroelectronics LTD
Inventor： Laurent Gonthier , Yu Tsao Lin
Abstract: A rectifying bridge has a thyristor coupled in series with a rectifying element between a first rectified output terminal of a rectifying bridge circuit and a second rectified output terminal of the rectifying bridge circuit. A diode is coupled in series with a DC voltage source between a gate of the thyristor and the second rectified output terminal.
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公开(公告)号：US11251696B2
公开(公告)日：2022-02-15
申请号：US16885781
申请日：2020-05-28
Applicant: STMicroelectronics LTD
Inventor： Laurent Gonthier
Abstract: A circuit includes two thyristors coupled in anti-series. An AC capacitor has first and second electrodes respectively coupled to two different electrodes of the two thyristors. The first and second electrodes are coupled to receive an AC voltage. A control circuit detects discontinuance of application of the AC voltage to the AC capacitor and in response thereto simultaneously applies same gate currents to the two thyristors. A current path through the two thyristors (one passing current in forward mode and the other in reverse mode) discharges a residual voltage stored on the AC capacitor.
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公开(公告)号：US11711013B2
公开(公告)日：2023-07-25
申请号：US17568247
申请日：2022-01-04
Applicant: STMicroelectronics LTD
Inventor： Laurent Gonthier
CPC classification number: H02M1/322 , H02M1/0085 , H02M1/08 , H02M7/155 , H02M7/1555
Abstract: A circuit includes two thyristors coupled in anti-series. An AC capacitor has first and second electrodes respectively coupled to two different electrodes of the two thyristors. The first and second electrodes are coupled to receive an AC voltage. A control circuit detects discontinuance of application of the AC voltage to the AC capacitor and in response thereto simultaneously applies same gate currents to the two thyristors. A current path through the two thyristors (one passing current in forward mode and the other in reverse mode) discharges a residual voltage stored on the AC capacitor.
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