公开(公告)号：US20210135574A1

公开(公告)日：2021-05-06

申请号：US17089102

申请日：2020-11-04

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Helene Esch ,  Mathilde Sie

IPC: H02M3/158 ,  H02M1/088

Abstract: In an embodiment, a voltage converter includes: a first transistor coupled between an internal node and a first node receiving a supply voltage; a second transistor coupled between the internal node and a second node receiving a reference voltage; an inductance coupled between the internal node and an output node; a first circuit controlling the first and second transistors; and a second circuit configured to detect, when the first and second transistors are in the off state, when the voltage of the internal node is equal to the voltage of the output node, to condition a switching to the on state of the first transistor.

公开(公告)号：US11750095B2

公开(公告)日：2023-09-05

申请号：US17078284

申请日：2020-10-23

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Helene Esch ,  Mathilde Sie ,  David Chesneau ,  Eric Feltrin

IPC: H02M3/158 ,  H02M1/08 ,  H02M1/00 ,  H02M3/156

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M1/0022 ,  H02M3/156

Abstract: In an embodiment, a voltage converter includes: a first transistor coupled between a first rail configured to receive a supply voltage and a first node; and an inductance coupled between the first node and a second node configured to deliver an output voltage, wherein, at each operating cycle of the converter, the first transistor is maintained in the on state for a first time period proportional to the inverse of a voltage difference between the supply voltage and the output voltage.

公开(公告)号：US20220360172A1

公开(公告)日：2022-11-10

申请号：US17661361

申请日：2022-04-29

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Helene Esch ,  Alexandre Meillereux

IPC: H02M3/158

Abstract: The present disclosure relates to a switched-mode Power Supply Buck Converter comprising: a switch connected between a node receiving a supply potential and an internal node; another switch connected between the internal node and a node receiving a reference potential; an inductive element coupling the internal node to an output node; and a control circuit controlling the switches so that current pulses in the inductive element have a maximum value selected from among at least a first value and a second value based on an average current drawn at the output node.

公开(公告)号：US20210126535A1

公开(公告)日：2021-04-29

申请号：US17078284

申请日：2020-10-23

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Helene Esch ,  Mathilde Sie ,  David Chesneau ,  Eric Feltrin

IPC: H02M3/158 ,  H02M1/08

Abstract: In an embodiment, a voltage converter includes: a first transistor coupled between a first rail configured to receive a supply voltage and a first node; and an inductance coupled between the first node and a second node configured to deliver an output voltage, wherein, at each operating cycle of the converter, the first transistor is maintained in the on state for a first time period proportional to the inverse of a voltage difference between the supply voltage and the output voltage.

公开(公告)号：US12107499B2

公开(公告)日：2024-10-01

申请号：US17661361

申请日：2022-04-29

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Helene Esch ,  Alexandre Meillereux

IPC: H02M3/158

CPC classification number: H02M3/158

Abstract: The present disclosure relates to a switched-mode Power Supply Buck Converter comprising: a switch connected between a node receiving a supply potential and an internal node; another switch connected between the internal node and a node receiving a reference potential; an inductive element coupling the internal node to an output node; and a control circuit controlling the switches so that current pulses in the inductive element have a maximum value selected from among at least a first value and a second value based on an average current drawn at the output node.

公开(公告)号：US11616440B2

公开(公告)日：2023-03-28

申请号：US17089102

申请日：2020-11-04

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Helene Esch ,  Mathilde Sie

IPC: H02M3/158 ,  H02M1/088

Abstract: In an embodiment, a voltage converter includes: a first transistor coupled between an internal node and a first node receiving a supply voltage; a second transistor coupled between the internal node and a second node receiving a reference voltage; an inductance coupled between the internal node and an output node; a first circuit controlling the first and second transistors; and a second circuit configured to detect, when the first and second transistors are in the off state, when the voltage of the internal node is equal to the voltage of the output node, to condition a switching to the on state of the first transistor.

公开(公告)号：US11539356B2

公开(公告)日：2022-12-27

申请号：US17078317

申请日：2020-10-23

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Helene Esch ,  David Chesneau

IPC: H03K5/24 ,  G05F1/56 ,  G05F3/24 ,  H02M3/158 ,  H02M3/335 ,  H03K17/082 ,  H03K17/687 ,  H03K19/00 ,  H02M3/00

Abstract: In an embodiment, a voltage comparator includes: a first switch having a conduction terminal coupled to an internal node that is coupled to an output of the voltage comparator; a current source; a capacitor; and a second switch connected in parallel with the capacitor, wherein the current source, the capacitor, and the first switch are coupled in series.

公开(公告)号：US11011983B2

公开(公告)日：2021-05-18

申请号：US16570660

申请日：2019-09-13

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： David Chesneau ,  Francois Amiard ,  Helene Esch

IPC: H02M3/157 ,  H02M1/08 ,  H02M1/00

Abstract: A method can be used for regulating a pulse-width modulation signal that is driving a voltage-buck switched-mode voltage regulator. The method includes comparing an input voltage of the switched-mode voltage regulator with a threshold voltage. The frequency of the pulse-width modulation signal is decreased when the input voltage is lower than the threshold voltage. The frequency is not decreased when the input voltage is not lower than the threshold voltage.

公开(公告)号：US11575306B2

公开(公告)日：2023-02-07

申请号：US17242955

申请日：2021-04-28

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： David Chesneau ,  Francois Amiard ,  Helene Esch

IPC: H02M1/08 ,  H02M3/157 ,  H02M1/00

Abstract: A method for increasing performance of a voltage-buck switched-mode voltage regulator includes generating a first pulse-width modulation signal based on a clock signal, decreasing a frequency of the clock signal to form a modified clock signal, passing the modified clock signal to a digital modulation circuit as a regulated clock signal; and generating a second pulse-width modulation signal based on the regulated clock signal using the digital modulation circuit. The first pulse-width modulation signal includes a period T1 and an off duration D2 corresponding to a first duty cycle. The off duration D2 is an intrinsic pulse-width modulation signal generation latency. The second pulse-width modulation signal includes a period T2 and the off duration D2. The decreased frequency of the modified clock signal causes T2 to be greater than T1 such that a second duty cycle of the second pulse-width modulation signal is increased relative to the first duty cycle.

公开(公告)号：US11171565B2

公开(公告)日：2021-11-09

申请号：US16584147

申请日：2019-09-26

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： David Chesneau ,  Helene Esch ,  Francois Amiard

IPC: H02M3/158 ,  H03F1/02

Abstract: In an embodiment, A device includes an operational amplifier and a feedback loop. The feedback loop is coupled between a first input of the operational amplifier and an output of the operational amplifier. The feedback loop is controllable according to a saturation of the operational amplifier. In one example, the device is incorporated in a microcontroller.