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公开(公告)号：US20210336533A1
公开(公告)日：2021-10-28
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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Patent Agency Ranking
公开(公告)号：US20220103062A1
公开(公告)日：2022-03-31
申请号：US17548754
申请日：2021-12-13
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：US20190006959A1
公开(公告)日：2019-01-03
申请号：US16020431
申请日：2018-06-27
Applicant: STMicroelectronics (Tours) SAS
Inventor： Ghafour BENABDELAZIZ , Cedric REYMOND , David JOUVE
Abstract: A reversible converter includes a first field effect transistor and a second field effect transistor coupled in series between a first terminal and a second terminal for a DC voltage. A first thyristor and a second thyristor are coupled in series between the first and second terminals for the DC voltage. A third thyristor and a fourth thyristor are also coupled in series between the first and second terminals for the DC voltage terminals, but have an opposite connection polarity with respect to the first and second thyristors. A midpoint of connection between the first and second field effect transistors and a common midpoint of connection between the first and second thyristors and the third and fourth thyristors are coupled to AC voltage terminals. Actuation of the transistors and thyristors is controlled in distinct manners to operate the converter in an AC-DC conversion mode and a DC-AC conversion mode.
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公开(公告)号：US20190214985A1
公开(公告)日：2019-07-11
申请号：US16240409
申请日：2019-01-04
Applicant: STMicroelectronics (Tours) SAS
Inventor： Ghafour BENABDELAZIZ , Romain PICHON
IPC: H03K17/725 , H03K17/60
Abstract: A circuit for controlling an anode-gate thyristor includes a first transistor that couples a thyristor gate to a first terminal to receive a potential lower than a potential of a second terminal connected to the thyristor anode. A control terminal of the first transistor is driven by a control signal which is positive with respect to the potential of the first terminal.
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公开(公告)号：US20180152116A1
公开(公告)日：2018-05-31
申请号：US15877854
申请日：2018-01-23
Applicant: STMICROELECTRONICS (TOURS) SAS
Inventor： Ghafour BENABDELAZIZ , Laurent GONTHIER
Abstract: A rectifying circuit including: between a first terminal of application of an AC voltage and a first rectified voltage delivery terminal, at least one first diode; and between a second terminal of application of the AC voltage and a second rectified voltage delivery terminal, at least one first anode-gate thyristor, the anode of the first thyristor being connected to the second rectified voltage delivery terminal; and at least one first stage for controlling the first thyristor, including: a first transistor coupling the thyristor gate to a terminal of delivery of a potential which is negative with respect to the potential of the second rectified voltage delivery terminal; and a second transistor connecting a control terminal of the first transistor to a terminal for delivering a potential which is positive with respect to the potential of the second rectified voltage delivery terminal, the anode of the first thyristor being connected to the common potential of voltages defined by said positive and negative potentials.
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公开(公告)号：US20190006960A1
公开(公告)日：2019-01-03
申请号：US16020413
申请日：2018-06-27
Applicant: STMicroelectronics (Tours) SAS
Inventor： Ghafour BENABDELAZIZ , Cedric REYMOND , David JOUVE
Abstract: A reversible converter includes a first field effect transistor and a second field effect transistor that are coupled in series between a first terminal and a second terminal for a DC voltage. A first triac and a second triac are also coupled in series between the first and second terminals of the DC voltage. Midpoints of the series coupled devices are coupled, through an inductive element, to first and second terminals for an AC voltage. Actuation of the transistors and triacs is controlled in distinct manners to operate the converter in an AC-DC conversion mode and a DC-AC conversion mode.
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