公开(公告)号：US09793815B2

公开(公告)日：2017-10-17

申请号：US14808184

申请日：2015-07-24

Applicant: Dell Products L.P.

Inventor： Wei Cheng Yu ,  Tsung-Cheng Liao ,  Merle Jackson Wood, III ,  Yan Yang ,  Keith J. Kasprzak

IPC: H02M3/335 ,  G06F1/32 ,  G06F1/26 ,  H02M1/32 ,  H02M1/00

CPC classification number: H02M3/33515 ,  G06F1/263 ,  G06F1/3287 ,  H02M1/32 ,  H02M2001/0009

Abstract: In accordance with embodiments of the present disclosure, a switch mode power supply may include a transformer, a controller configured to generate a periodic switching signal, a switching transistor coupled between a sense node and the transformer, primarily configured to prevent or permit current flow in the transformer primary winding in accordance with the switching signal, a sense resistor coupled to the switching transistor at a sense node, and a limit circuit configured to obtain a voltage of the sense node at a particular point of the switching period as an indicator of the primary winding current, detect a duration of a demagnetizing interval, and generate a limit signal, based on the sense node voltage and the demagnetizing interval, indicating a power supply output current exceeding a limit threshold.

公开(公告)号：US12224574B2

公开(公告)日：2025-02-11

申请号：US17510445

申请日：2021-10-26

Applicant: Dell Products L.P.

Inventor： Wei Cheng Yu ,  Merle Jackson Wood, III ,  Geroncio Ong Tan ,  Chi Che Wu

IPC: H02H3/20 ,  G01R31/40 ,  H02H1/00

Abstract: Described are computer implemented methods, a system and a power supply amplifier (PSA) that supports compliance testing of the PSA. The power supplies power to a powered device/information handling system. A voltage of synchronous rectifier (SR) gate is measured and compared to a calculated sense voltage at a sense resistor of the PSA. If the sense voltage is zero, received current of the PSA bypasses a first blocking MOSFET and a second blocking MOSFET for over voltage protection. If the sense voltage is not zero, the received current passes through the first blocking MOSFET.

公开(公告)号：US11789511B2

公开(公告)日：2023-10-17

申请号：US17451968

申请日：2021-10-22

Applicant: Dell Products L.P.

Inventor： Yong-Teng Lin ,  Jui-Chin Fang ,  Chi Che Wu ,  Wei Cheng Yu ,  Geroncio Tan

IPC: G06F1/28 ,  H02J7/00 ,  G01R19/165 ,  G01R19/10

CPC classification number: G06F1/28 ,  G01R19/10 ,  G01R19/1659 ,  H02J7/00032 ,  H02J7/0047 ,  H02J7/00712

Abstract: In one or more embodiments, one or more systems, one or more methods, and/or one or more processes may: send, by a battery management unit (BMU) of a battery of an information handling system (IHS), a request for a first amount of current to an embedded controller (EC) of the IHS; provide, by the EC, the request for the first amount of current to a charger of the IHS; receive, by the charger, the request; provide, by the charger, a second amount of current based at least on the request and based at least on a voltage measurement across a resistor of the charger; determine, by the BMU, a measurement of the second amount of current; provide, by the BMU, the measurement to the EC; determine, by the EC, that the measurement does not match the first amount of current; and provide, by the EC, an alert.

公开(公告)号：US20230268699A1

公开(公告)日：2023-08-24

申请号：US18123189

申请日：2023-03-17

Applicant: DELL PRODUCTS L.P.

Inventor： Wei Cheng Yu ,  Andrew Sultenfuss ,  Chi Che Wu ,  Tsung-Cheng Liao

IPC: H01R24/38 ,  G06F1/26 ,  H01R13/428 ,  H01R31/06 ,  H01R43/20

CPC classification number: H01R24/38 ,  G06F1/26 ,  H01R13/428 ,  H01R31/065 ,  H01R43/20 ,  H01R2103/00

Abstract: The present disclosure provides embodiments of direct current (DC) power connectors and methods to manufacture the same. More specifically, the present disclosure provides a connector plug with improved power capacity and structural rigidity. The connector plug includes an inner body and an outer body coupled to transmit power through the DC power connector, wherein the inner body is concentrically arranged within the outer body, and an insulating barrel that is coupled between the inner body and the outer body to electrically isolate the inner body from the outer body. The inner body and outer body comprise a base metal or metal alloy having an electrical conductivity ranging between 30% International Annealed Copper Standard (IACS) and greater than or equal to 99% IACS. In addition, the inner body, outer body and insulating barrel comprise an interlocking feature, which increases the structural rigidity of the connector plug and prevents disassembly when the inner body, outer body and insulated barrel are assembled together.

公开(公告)号：US20230131113A1

公开(公告)日：2023-04-27

申请号：US17451968

申请日：2021-10-22

Applicant: Dell Products L.P.

Inventor： Yong-Teng Lin ,  Jui-Chin Fang ,  Chi Che Wu ,  Wei Cheng Yu ,  Geroncio Tan

IPC: G06F1/28 ,  H02J7/00 ,  G01R19/10 ,  G01R19/165

Abstract: In one or more embodiments, one or more systems, one or more methods, and/or one or more processes may: send, by a battery management unit (BMU) of a battery of an information handling system (IHS), a request for a first amount of current to an embedded controller (EC) of the IHS; provide, by the EC, the request for the first amount of current to a charger of the IHS; receive, by the charger, the request; provide, by the charger, a second amount of current based at least on the request and based at least on a voltage measurement across a resistor of the charger; determine, by the BMU, a measurement of the second amount of current; provide, by the BMU, the measurement to the EC; determine, by the EC, that the measurement does not match the first amount of current; and provide, by the EC, an alert.

公开(公告)号：US20230128943A1

公开(公告)日：2023-04-27

申请号：US17510445

申请日：2021-10-26

Applicant: Dell Products L.P.

Inventor： Wei Cheng Yu ,  Merle Jackson Wood, III ,  Geroncio Ong Tan ,  Chi Che Wu

IPC: H02H3/20 ,  H02H1/00 ,  G01R31/40

Abstract: Described are computer implemented methods, a system and a power supply amplifier (PSA) that supports compliance testing of the PSA. The power supplies power to a powered device/information handling system. A voltage of synchronous rectifier (SR) gate is measured and compared to a calculated sense voltage at a sense resistor of the PSA. If the sense voltage is zero, received current of the PSA bypasses a first blocking MOSFET and a second blocking MOSFET for over voltage protection. If the sense voltage is not zero, the received current passes through the first blocking MOSFET.

公开(公告)号：US11442519B1

公开(公告)日：2022-09-13

申请号：US17182779

申请日：2021-02-23

Applicant: DELL PRODUCTS L.P.

Inventor： Wei Cheng Yu ,  Geroncio O. Tan ,  Merle Wood, III ,  Chi Che Wu ,  Tsung-Cheng Liao ,  Wen-Yung Chang

IPC: G06F1/26 ,  H02M3/335 ,  H02M1/32 ,  G05B19/042 ,  G06F13/42 ,  G06F1/28

Abstract: The present disclosure provides various embodiments of an external power supply and methods to enhance the output power delivered by an external power supply to a power consuming load. As described in more detail below, the embodiments disclosed herein enable an external power supply to deliver a higher than maximum output power for short periods of time when ambient temperatures within the external power supply are low. As the ambient temperature increases, the embodiments disclosed herein throttle (or incrementally reduce) the output power delivered by the external power supply until the maximum output power specified for the power supply is reached. Although not strictly limited to such, the external power supply may be a Universal Serial Bus (USB)-enabled AC/DC adapter, and more specifically, a USB Power Deliver (USB-PD) AC/DC adapter, in some embodiments.

公开(公告)号：US09906143B1

公开(公告)日：2018-02-27

申请号：US15282189

申请日：2016-09-30

Applicant: Dell Products L.P.

Inventor： Wei Cheng Yu ,  Tsung Cheng Liao ,  Merle Wood ,  Geroncio O. Tan

IPC: H02M3/335 ,  H02M1/08 ,  H02H7/12 ,  H02H11/00 ,  H02H3/087 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02H3/087 ,  H02H7/1213 ,  H02H11/007 ,  H02M1/08 ,  H02M2001/0009

Abstract: Systems and methods are provided that may be implemented to provide a power supply with automatic overcurrent protection (OCP) point calibration and/or current sense resistor (Rsense) verification. The provided systems and methods may implement auto-calibration techniques on the secondary side of a power supply to achieve a more precise OCP point than is possible with conventional adapter technology, and in one example may implement auto trimming for OCP voltage threshold value.

公开(公告)号：US20180054127A1

公开(公告)日：2018-02-22

申请号：US15785154

申请日：2017-10-16

Applicant: Dell Products L.P.

Inventor： Wei Cheng Yu ,  Tsung-Cheng Liao ,  Merle Jackson Wood, III ,  Yan Yang ,  Keith J. Kasprzak

IPC: H02M3/335 ,  G06F1/32 ,  G06F1/26 ,  H02M1/00 ,  H02M1/32

CPC classification number: H02M3/33515 ,  G06F1/263 ,  G06F1/3287 ,  H02M1/32 ,  H02M2001/0009

Abstract: In accordance with embodiments of the present disclosure, a switch mode power supply may include a transformer, a controller configured to generate a periodic switching signal, a switching transistor coupled between a sense node and the transformer, primarily configured to prevent or permit current flow in the transformer primary winding in accordance with the switching signal, a sense resistor coupled to the switching transistor at a sense node, and a limit circuit configured to obtain a voltage of the sense node at a particular point of the switching period as an indicator of the primary winding current, detect a duration of a demagnetizing interval, and generate a limit signal, based on the sense node voltage and the demagnetizing interval, indicating a power supply output current exceeding a limit threshold.

公开(公告)号：US20170179831A1

公开(公告)日：2017-06-22

申请号：US14973456

申请日：2015-12-17

Applicant: Dell Products L.P.

Inventor： Wei Cheng Yu ,  Tsung-Cheng Liao ,  Wen-Yung Chang ,  Merle Jackson Wood, III ,  Tun-Chieh Liang

IPC: H02M3/335

CPC classification number: H02M3/33569 ,  H02M2001/0022

Abstract: A zero voltage switching method for a flyback converter featuring a transformer with first and second primary windings and corresponding turns ratios, N1 and N2, includes rectifying and filtering an AC signal to produce a primary DC voltage. A voltage level signal indicating whether the primary DC voltage falls within a particular voltage range is generated. The voltage level signal is used to select a particular primary winding from either the first primary winding or the second primary winding. A PWM controller corresponding to the particular primary winding is activated and an output of the particular PWM controller performs zero voltage switching of a gate terminal of the applicable main switching transistor. A duty cycle of the main switching transistor is maintained within a range of approximately 50% to approximately 60% in accordance with the turns ratio and the primary DC voltage to achieve a desired output voltage.