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公开(公告)号：US20240235391A1
公开(公告)日：2024-07-11
申请号：US18153057
申请日：2023-01-11
Applicant: Apple Inc.
Inventor： Victor Zyuban , Jay B. Fletcher , Hao Zhou
IPC: H02M3/158
CPC classification number: H02M3/158
Abstract: A power management circuit for computer systems includes a power converter circuit that generates different voltage levels at different time periods. Multiple voltage regulator circuits are coupled to the output of the power converter circuit and to respective local power supply nodes. Switch devices are used to bypass the voltage regulator circuits during corresponding ones of the different time periods.
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公开(公告)号：US20240069621A1
公开(公告)日：2024-02-29
申请号：US17823949
申请日：2022-08-31
Applicant: Apple Inc.
Inventor： Shawn Searles , Sanjay Pant , Ludmil N. Nikolov , Tiago Filipe Galhoz Patrao , Enrico Zanetti , Hao Zhou , Vincenzo Bisogno
IPC: G06F1/3296 , H02M1/00 , H02M3/157
CPC classification number: G06F1/3296 , H02M1/0006 , H02M1/0025 , H02M1/007 , H02M3/157
Abstract: A power delivery system included in a computer system using multiple power converter circuits to generate respective voltage levels on multiple power supply nodes. The power delivery system includes a step-down power converter circuit that generates a voltage level for use by host and follower power converter circuits. The host power converter circuit generates an external demand current that is shared by multiple follower power converter circuits to regulate the voltage level on the multiple power supply nodes. The power delivery system can be scaled to different platforms of the computer system by adjusting the number of follower power converter circuits.
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公开(公告)号：US20230353048A1
公开(公告)日：2023-11-02
申请号：US17661509
申请日：2022-04-29
Applicant: Apple Inc.
Inventor： Jay B. Fletcher , Nathan F. Hanagami , Sanjay Pant , Hao Zhou , Shawn Searles
Abstract: A voltage regulator circuit included in a computer system may employ a control circuit and a switch array that includes multiple switch circuits. Different groups of switch circuits that include respective groups of switch devices are coupled between an input power supply node and corresponding regulated power supply nodes. To maintain desired respective voltages on the regulated power supply nodes, the control circuit compares the voltages of the regulated power supply nodes to corresponding reference voltages and, based on results of the comparisons, opens and closes various ones of the switch devices included in the different groups of switch circuits.
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公开(公告)号：US20230188035A1
公开(公告)日：2023-06-15
申请号：US17644521
申请日：2021-12-15
Applicant: Apple Inc.
Inventor： Jonathan F. Bolus , Alberto Alessandro Angelo Puggelli , Fabio Gozzini , Hao Zhou
CPC classification number: H02M3/158 , H02M1/0009
Abstract: A power converter is disclosed. The power converter includes a switching circuit configured to source current to a switch node that is coupled, via an inductor, to a regulated power supply node. A DC resistance sensing circuit includes a first filter and a second filters. The first filter circuit is configured to filter a voltage level of a first terminal of the inductor to generate a first filtered signal, while the second filter circuit is configured to filter a voltage level of a second terminal of the inductor to generate a second filtered signal. A control circuit is configured to adjust the operation of the switching circuit using a voltage level of the regulated power supply node, the first filtered signal, and the second filtered signal.
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公开(公告)号：US20220399810A1
公开(公告)日：2022-12-15
申请号：US17343459
申请日：2021-06-09
Applicant: Apple Inc.
Inventor： Hao Zhou , Sarfraz Shaikh , Jay B. Fletcher , Sanjay Pant , Mark A. Yoshimoto , Vincenzo Bisogno , Shawn Searles
Abstract: A power management circuit included in a computer system regulates a voltage level of a power supply node used by other circuits in the computer system. The power management circuit includes a control circuit and multiple phase circuits coupled to the regulated power supply node via corresponding inductors. The control circuit selectively activates particular ones of the multiple phase circuits allowing them source respective currents to the regulated power supply node. The control circuit also selectively activates particular ones of other phase circuits that are external to the power management circuit and coupled to the regulated power supply node via their own corresponding inductors. Once activated, the external phase circuits source respective currents to the regulated power supply node via their corresponding inductors.
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Patent Agency Ranking
公开(公告)号：US20220329147A1
公开(公告)日：2022-10-13
申请号：US17229470
申请日：2021-04-13
Applicant: Apple Inc.
Inventor： Yue Wen , Hubert Attah , Wenxun Huang , Hao Zhou
Abstract: A power converter circuit included in a computer system regulates a power supply voltage used by other circuits in the computer system. During operation, the power converter circuit monitors the load current, and, in response to a transient in the load current, switches regulation modes to adapt to the new load conditions. Upon a detection of the end of the transient in the load current, the power converter returns to its original regulation mode.
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17.发明申请公开(公告)号：US20220103074A1
公开(公告)日：2022-03-31
申请号：US17482215
申请日：2021-09-22
Applicant: Apple Inc.
Inventor： Chongli Cai , Hao Zhou , Jay B. Fletcher
IPC: H02M3/158
Abstract: A power converter circuit that includes multiple phase circuits may employ coupled inductors to generate a particular voltage level on a regulated power supply node. Based on a comparison of a voltage level of the regulated power supply node and a reference voltage, the power converter circuit may initiate an active period, during which the phase circuits source respective currents to the regulated power supply node via corresponding coils included in the coupled inductor. After a time period has elapsed following an initiation of the active period, the operation of the phase circuits is adjusted so that the respective currents flowing in the coils of the coupled inductor are out of phase.
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公开(公告)号：US11264900B2
公开(公告)日：2022-03-01
申请号：US16793516
申请日：2020-02-18
Applicant: Apple Inc.
Inventor： Bogdan-Eugen Matei , Alessandro Molari , Fabio Ongaro , Giovanni Saccomanno , Hao Zhou
Abstract: The present disclosure is directed to a pulse frequency modulation (PFM) control method for a boost converter and apparatus for carrying out the method. A boost converter includes an inductor and a transistor coupled thereto. A control circuit is arranged to control the transistor to cause current pulsed to be sourced through the inductor. When operating in a PFM mode, the control circuit may control the timing of pulses such that, at the beginning of a specified time period, current pulses may be sourced with no spacing between successive pulses. After a desired number of pulses have been sourced, no pulses are sourced for the remainder of the specified time period. Nevertheless, the number of pulses sourced over the time period corresponds to a desired average frequency of pulses.
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公开(公告)号：US11128300B1
公开(公告)日：2021-09-21
申请号：US16820659
申请日：2020-03-16
Applicant: Apple Inc.
Inventor： Nathan F. Hanagami , Hao Zhou , Jianbao Wang , Ruopeng Wang , Ludmil N. Nikolov
IPC: H03L5/00 , H03K19/0185 , H03K19/003 , H03K19/017 , H03K19/21 , H03K19/173
Abstract: A level shifter circuit with an intermediate power domain and method for operating the same is disclosed. The level shifter circuit includes an input circuit, an output circuit, and an intermediate circuit. The input circuit is coupled to receive an input signal from a first voltage domain operating according to a first supply voltage, and generates a first intermediate signal. The intermediate circuit receives the first intermediate signal and generates a second intermediate signal. The output circuit receives the intermediate signal and provides an output signal into a second voltage domain operating at a second supply voltage different from the first. A voltage multiplexer is configured to provide one of the first or second supply voltages to the intermediate circuit depending on a state of the input signal.
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公开(公告)号：US20210257912A1
公开(公告)日：2021-08-19
申请号：US16791773
申请日：2020-02-14
Applicant: Apple Inc.
Inventor： Alberto Alessandro Angelo Puggelli , Hubert Attah , Hao Zhou , Shawn Searles
IPC: H02M3/158
Abstract: An apparatus includes a control circuit and a voltage regulator circuit coupled to a regulated power supply node. The voltage regulator circuit is configured to generate a power signal on the regulated power supply node using a reference voltage level. The apparatus further includes a control circuit that is configured to determine an operating mode using results of a comparison of a threshold value and a load current being drawn from the regulated power supply node by a load circuit. The control circuit may be further configured to set, in a first operating mode, the reference voltage level independently of the load current, and set, in a second operating mode, the reference voltage level using the load current.
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