公开(公告)号：US20190222136A1

公开(公告)日：2019-07-18

申请号：US16362939

申请日：2019-03-25

Applicant: STMicroelectronics (Tours) SAS ,  STMicroelectronics S.r.l.

Inventor： Laurent GONTHIER ,  Roberto LAROSA ,  Giulio ZOPPI

IPC: H02M7/06 ,  G05B19/10 ,  H02M1/08 ,  H02M7/162 ,  H02M1/36

Abstract: An AC/DC converter includes a first terminal and a second terminal to receive an AC voltage and a third terminal and a fourth terminal to deliver a DC voltage. A rectifying bridge is provided in the converter. A controllable switching or rectifying element has a control terminal configured to receive a control current. A first switch is coupled between a supply voltage and the control terminal to inject the control current. A second switch is coupled between the control terminal and a reference voltage to extract the control current. The first and second switches are selectively actuated by a control circuit.

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

IPC: H02M1/42 ,  H02M7/155 ,  H02M7/217

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.

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

IPC: H02M7/06 ,  H02M1/08 ,  H02M1/32 ,  H02M1/42 ,  H02M1/36

CPC classification number: H02M7/06 ,  H02M1/08 ,  H02M1/32 ,  H02M1/36 ,  H02M1/42 ,  H02M7/1623

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.

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

IPC: H02M1/42 ,  H02M7/217 ,  H02M7/155

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.