公开(公告)号：US20200287465A1

公开(公告)日：2020-09-10

申请号：US16295449

申请日：2019-03-07

Applicant: QUALCOMM Incorporated

Inventor： Yikai WANG ,  Joseph Dale RUTKOWSKI

IPC: H02M3/335 ,  H02M1/14 ,  H03K4/62

Abstract: Certain aspects of the present disclosure generally relate to a switch mode power supply (SMPS). The SMPS generally includes at least one switch, an inductive element coupled to the at least one switch, and control circuitry, the control circuitry being configured to control the at least one switch, during each switching cycle of a plurality switching cycles of the SMPS, to transfer charge from an input voltage (Vin) node of the SMPS to the inductive element during an on-time of the switching cycle and transfer the charge to an output voltage (Vout) node of the SMPS during an off-time of the switching cycle. The on-time may be set based on a duty ratio of the SMPS, the duty ratio representing a ratio between a voltage at the Vin node and a voltage at the Vout node, the on-time being fixed depending on the duty ratio of the SMPS.

公开(公告)号：US20190334345A1

公开(公告)日：2019-10-31

申请号：US15962524

申请日：2018-04-25

Applicant: QUALCOMM Incorporated

Inventor： Yikai WANG ,  Joseph RUTKOWSKI

IPC: H02H9/04 ,  H03K17/22 ,  H03K5/06 ,  G01R19/165 ,  H03F1/30

Abstract: Certain aspects of the present disclosure provide a voltage transient detection circuit. The circuit generally includes a first switch having a first terminal coupled to an input signal source node, and a second switch having a first terminal coupled to the input signal source node. The apparatus includes a first shunt capacitive element coupled to a second terminal of the first switch, a second shunt capacitive element coupled to a second terminal of the second switch, a differential circuit having a first input coupled to the second terminal of the first switch, a second input coupled to the second terminal of the second switch, and an output coupled to an output node of the voltage transient detection circuit. For certain aspects, the apparatus also includes a first current source (selectively) coupled to the first shunt capacitive element and a second current source (selectively) coupled to the second shunt capacitive element.

公开(公告)号：US20250015702A1

公开(公告)日：2025-01-09

申请号：US18894666

申请日：2024-09-24

Applicant: QUALCOMM Incorporated

Inventor： Joseph Dale RUTKOWSKI ,  Yikai WANG ,  Navankur BEOHAR

IPC: H02M1/00 ,  H02M3/158

Abstract: Certain aspects of the present disclosure generally relate to electronic circuits and, more particularly, to a power supply circuit and techniques for voltage regulation. One example method for voltage regulation is performed by a switched-mode power supply (SMPS). The method generally includes charging a first capacitive element during a first discharge phase of the SMPS having a first voltage rail and a second voltage rail, the first voltage rail being separate from the second voltage rail. Charging the first capacitive element may include directing a first current to flow from the second voltage rail to a reference potential node through the first capacitive element. In some aspects, the method also includes generating an output voltage at the output node during a first charge phase by directing a second current to flow from the first voltage rail to an inductive element of the SMPS through the first capacitive element.

公开(公告)号：US20230283163A1

公开(公告)日：2023-09-07

申请号：US17653678

申请日：2022-03-07

Applicant: QUALCOMM Incorporated

Inventor： Joseph Dale RUTKOWSKI ,  Yikai WANG ,  Navankur BEOHAR

IPC: H02M1/00 ,  H02M3/158

CPC classification number: H02M1/0095 ,  H02M3/1582

Abstract: Certain aspects of the present disclosure generally relate to electronic circuits and, more particularly, to a power supply circuit and techniques for voltage regulation. One example method for voltage regulation is performed by a switched-mode power supply (SMPS). The method generally includes charging a first capacitive element during a first discharge phase of the SMPS having a first voltage rail and a second voltage rail, the first voltage rail being separate from the second voltage rail. Charging the first capacitive element may include directing a first current to flow from the second voltage rail to a reference potential node through the first capacitive element. In some aspects, the method also includes generating an output voltage at the output node during a first charge phase by directing a second current to flow from the first voltage rail to an inductive element of the SMPS through the first capacitive element.

公开(公告)号：US20200073425A1

公开(公告)日：2020-03-05

申请号：US16554082

申请日：2019-08-28

Applicant: QUALCOMM Incorporated

Inventor： Yikai WANG ,  Sivaprasad EMBANATH ,  Joseph Dale RUTKOWSKI

IPC: G05F1/575 ,  G05F1/565

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for switching between modes of a multi-mode power supply circuit. One example power supply circuit generally includes a switched-mode power supply (SMPS) circuit, a voltage regulator circuit having an input coupled to an output of the SMPS circuit, the voltage regulator circuit being configured to be selectively enabled, a first voltage divider selectively coupled to the output of the SMPS circuit and selectively coupled to an output of the voltage regulator circuit, and a second voltage divider coupled to the output of the voltage regulator circuit.