公开(公告)号：US11251607B2

公开(公告)日：2022-02-15

申请号：US16212594

申请日：2018-12-06

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Mohamed Amin Bemat ,  Daniel Humphrey ,  Benjamin Wade Dumas

IPC: H02H9/02 ,  H03K17/082

Abstract: An electronic fuse (e-fuse) for controlling input current of a load includes a transistor switch and a transorb device that is coupled in parallel to the transistor switch between a source and a drain of the transistor switch. A circuit comprising the transistor switch and the transorb device in parallel comprises a first end and a second end. The first end of the circuit is coupled to a power bus. The second end of the circuit is coupled to a first node of the load. The e-fuse includes an RC circuit comprising a resistor coupled in series with a first capacitor. The RC circuit is coupled between the power bus at the first end of the circuit and a return. The return is coupled to a second node of the load. The e-fuse includes a second capacitor that is coupled between the return and the second end of the circuit.

公开(公告)号：US10892636B2

公开(公告)日：2021-01-12

申请号：US15941288

申请日：2018-03-30

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Mohamed Amin Bemat ,  Kirk Yates

IPC: H02J9/06 ,  H02J7/00 ,  G06F1/30 ,  H01R107/00 ,  H01R24/62

Abstract: Example implementations relate to plug-in backup energy devices. In some examples, a plug-in backup energy device may comprise a charger, an energy storage device coupled to the charger, and a buck-boost converter coupled to the charger and the energy storage device such that the buck-boost converter maintains a charge of the energy storage device during a no-fault mode of a computing device, and in response to the plug-in backup energy device switching from a normal mode to a power supply mode as a result of the computing device experiencing a fault, regulates a voltage output of the energy storage device to provide energy to the computing device during the fault of the computing device.

公开(公告)号：US20200159304A1

公开(公告)日：2020-05-21

申请号：US16195974

申请日：2018-11-20

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Daniel Humphrey ,  Mohamed Amin Bemat

IPC: G06F1/324 ,  G06F1/30 ,  G06F1/3206

Abstract: A supplemental power supply system of a computing device may determine an occurrence of a transient at a processor of the computing device having a first electrical power supplied by a primary power supply of the computing device different from the supplemental power supply system. A discharging circuitry of the supplemental power supply system may, in response to determining the occurrence of the transient: discharge electrical energy from energy storage of the supplemental power supply system and supply a second electrical power to the processor using the electrical energy discharged from the energy storage.

公开(公告)号：US10658840B2

公开(公告)日：2020-05-19

申请号：US15568460

申请日：2015-07-17

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Daniel Humphrey ,  Michael Delany ,  Mohamed Amin Bemat

IPC: H02J3/06 ,  H02J9/00 ,  H02J1/10 ,  G05F1/44

Abstract: An example system includes a failure detection circuit. The failure detection circuit is to detect a failure of a first power source electrically coupled to a first load. The failure detection circuit is to output a first signal indicating the detection of the failure of the first power source. The system also includes a current regulating circuit. The current regulating circuit is electrically coupled to the failure detection circuit. The current regulating circuit is to electrically couple a second power source to the first load based on the first signal output by the failure detection circuit. The current regulating circuit is to restrict a first current from the second power source.

公开(公告)号：US20190235008A1

公开(公告)日：2019-08-01

申请号：US15881031

申请日：2018-01-26

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Kirk Yates ,  Mohamed Amin Bemat

IPC: G01R31/02 ,  G06F1/26

CPC classification number: G01R31/028 ,  G06F1/26

Abstract: Example implementations relate to performance tests of capacitors. In some examples, a controller may comprise a processing resource to measure a change in voltage of a capacitor of a circuit in response to the controller entering a test mode, determine, based on the measured change in the voltage and an impedance of the circuit, a capacitance of the capacitor, compare the determined capacitance of the capacitor to a predetermined capacitance value, and determine, based on the comparison, a performance of the capacitor.

公开(公告)号：US20190089191A1

公开(公告)日：2019-03-21

申请号：US15710916

申请日：2017-09-21

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Mark Isagani Bello Rivera ,  Stephen Airey ,  Mohamed Amin Bemat ,  David P. Mohr ,  Daniel Humphrey

IPC: H02J9/06 ,  G06F1/30 ,  H02J7/00 ,  H02J7/34

Abstract: Examples herein relate to a power supply system for a server. The system comprises a primary source, a power interface and a direct current (DC) energy supply chargeable by the primary source through the power interface. The primary source to power the server through the power interface and in the event of failure of the primary source, the DC energy supply powers the server through the power interface. The DC energy supply is located inside the server on a cool side of the server.

公开(公告)号：US20190006839A1

公开(公告)日：2019-01-03

申请号：US16063363

申请日：2015-12-18

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Daniel Humphrey ,  Howard Leverenz ,  Michael Delany ,  Mohamed Amin Bemat

IPC: H02H9/00 ,  G01R27/26 ,  G06F1/26 ,  H03K17/16 ,  H03K17/22

Abstract: Example implementations relate to a variable soft start device. For example, in an implementation, the variable soft start device may set the capacitance of a variable capacitance circuit connected to a soft start pin of the electronic fuse. The variable soft start device may read a power-good signal from the electronic fuse and determine the capacitance to set according to the power-good signal.

公开(公告)号：US20180175740A1

公开(公告)日：2018-06-21

申请号：US15383346

申请日：2016-12-19

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Daniel Humphrey ,  Mohamed Amin Bemat

IPC: H02M7/04 ,  H02M1/42 ,  H02M1/36

CPC classification number: H02M3/1584 ,  H02M1/36 ,  H02M1/4208 ,  H02M1/4225 ,  H02M3/1582 ,  H02M2001/325 ,  H02M2001/4291 ,  H02M2003/071 ,  H02M2003/1586

Abstract: An example device in accordance with an aspect of the present disclosure includes a first converter to selectively convert a first input signal to a first output signal, and a second converter to selectively convert a second input signal to a second output signal. A controller is to control switches of the first and second converters based on the input signals and output signals, and based on operating the first and second converters exclusively with respect to each other such that a total of first and second duty cycles does not exceed one.

公开(公告)号：US20220006287A1

公开(公告)日：2022-01-06

申请号：US16919371

申请日：2020-07-02

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Mohamed Amin Bemat ,  Kailash Kishore Mirpuri ,  Daniel Humphrey

IPC: H02H9/02 ,  H02H1/00 ,  H02H9/00

Abstract: Examples described herein relate to a power management system. The power management system may include an input power filter coupled between a common power bus having a first voltage level and a load. The input power filter may include a variable impedance circuit coupled to an input capacitor. Further, the power management system may include a bus voltage controller coupled to the input power filter to detect a transient event causing a surge in a load current drawn by the load and to alter an impedance of the variable impedance circuit to limit an input current flowing via the variable impedance circuit, thereby maintaining voltage on the common power bus within a predefined range from the first voltage level.

公开(公告)号：US20220004240A1

公开(公告)日：2022-01-06

申请号：US16919349

申请日：2020-07-02

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Mohamed Amin Bemat ,  Daniel Humphrey

IPC: G06F1/30

Abstract: Examples described herein relate to a system controller for tracking a characteristic system energy of a computing system. The system controller may retrieve the characteristic system energy of the computing system from a voltage regulator (VR). The VR may include a VR controller, one or more phase converters, and an output capacitor coupled to a load to provide an operating voltage to the load. The characteristic system energy is related to a sum of capacitances comprising a capacitance of the output capacitor and a capacitance of the load and is determined by the VR controller based on a voltage at the output capacitor and a charging current or a discharging current of the output capacitor via the one or more phase converters. Further, the system controller may determine whether to initiate a corrective action for the VR based on a comparison between the characteristic system energy and a threshold value.