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公开(公告)号：US20220302826A1
公开(公告)日：2022-09-22
申请号：US17203567
申请日：2021-03-16
Applicant: Apple Inc.
Inventor： Bogdan-Eugen Matei , Cristian Grecu , Fabio Ongaro , Giovanni Saccomanno , Siarhei Meliukh , Yesim Inam
IPC: H02M3/07
Abstract: A dual-stage boost converter is disclosed. The boost converter includes a charge pump and a boost stage. The charge pump is coupled between an input voltage source and the boost stage. The charge pump is coupled to receive the input voltage and configured to generate an intermediate voltage that is greater than the input voltage received from the input voltage source. The boost stage includes an inductor coupled to receive the intermediate voltage and is configured to generate an output voltage that is greater than or equal to the intermediate voltage.
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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：US11152846B2
公开(公告)日：2021-10-19
申请号：US16743443
申请日：2020-01-15
Applicant: Apple Inc.
Inventor： Bogdan-Eugen Matei , Alessandro S. Molari , Angelo Bassi , Fabio Ongaro , Giovanni Saccomanno
Abstract: A DC-DC converter providing adaptive peak current control is disclosed. A DC-DC converter includes an inductor having first and second terminals coupled to a voltage source and a transistor, respectively. The DC-DC circuit further includes a control circuit configured to control activation of the transistor. A first control block of the control circuit controls the transistor (and thus the inductor peak current) using pulse frequency modulation (PFM). A second control block controls the transistor using pulse width modulation (PWM) and PFM. In a first mode of operation, the control circuit activates the transistor, using PFM, such that the peak-to-peak current through the inductor has a fixed value. In a second mode of operation, the control circuit activates the transistor such that the peak-to-peak current through the inductor is modulated, using both PWM and PFM.
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公开(公告)号：US10924012B1
公开(公告)日：2021-02-16
申请号：US16585261
申请日：2019-09-27
Applicant: Apple Inc.
Inventor： Yesim Inam , Miguel A. Dos Santos , Fabio Ongaro
IPC: H02M3/156
Abstract: A power converter circuit that includes a switch node coupled to a regulated power supply node via an inductor may, during a charge cycle, source current to the switch node, and source a bypass current to the regulated power supply node using a regulator control signal. A control circuit may initiate the charge cycle using a first reference voltage level and a sensed inductor current, and generate the regulator control signal using a second reference voltage level and a voltage level of the regulated power supply node.
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公开(公告)号：US10256728B1
公开(公告)日：2019-04-09
申请号：US15850407
申请日：2017-12-21
Applicant: Apple Inc.
Inventor： Michael Couleur , Fabio Ongaro , Nikola Jovanovic , Frank Trautmann
Abstract: An apparatus includes a plurality of pulse control circuits and a control circuit. A given pulse control circuit of the plurality of pulse control circuits may source a current pulse to the output power signal based on a comparison of a particular feedback signal of a plurality of feedback signals and a target voltage signal. The control circuit may offset a voltage level of each feedback signal of a first subset of the plurality of feedback signals. The first subset may exclude a first feedback signal. In response to a determination that a period of time has ended, the control circuit may offset a voltage level of each feedback signal of a second subset of the plurality of feedback signals. The second subset may include the first feedback signal and exclude a second feedback signal.
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Patent Agency Ranking
公开(公告)号：US12273977B2
公开(公告)日：2025-04-08
申请号：US18338916
申请日：2023-06-21
Applicant: Apple Inc.
Inventor： Cristian Grecu , Nicola Rasera , Bogdan-Eugen Matei , Fabio Ongaro
IPC: H05B45/30 , G05F1/575 , H03M7/16 , H05B45/34 , H05B45/397
Abstract: A high current, low dropout driver circuit is disclosed. The circuit includes a decoder configured to decode a plurality of control bits to generate a plurality of control signals, and a current source having a plurality of devices. The current source is configured to activate at least a subset of the plurality of devices using the control signals to provide a load current to a load circuit, such as a light-emitting diode (LED), using activated ones of the plurality of devices and a control voltage. A control circuit is configured to generate the control voltage based on the load current and a reference current.
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公开(公告)号：US20240431001A1
公开(公告)日：2024-12-26
申请号：US18338916
申请日：2023-06-21
Applicant: Apple Inc.
Inventor： Cristian Grecu , Nicola Rasera , Bogdan-Eugen Matei , Fabio Ongaro
IPC: H05B45/397 , G05F1/575 , H05B45/34
Abstract: A high current, low dropout driver circuit is disclosed. The circuit includes a decoder configured to decode a plurality of control bits to generate a plurality of control signals, and a current source having a plurality of devices. The current source is configured to activate at least a subset of the plurality of devices using the control signals to provide a load current to a load circuit, such as a light-emitting diode (LED), using activated ones of the plurality of devices and a control voltage. A control circuit is configured to generate the control voltage based on the load current and a reference current.
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公开(公告)号：US20210257911A1
公开(公告)日：2021-08-19
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
IPC: H02M3/158
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：US11038413B2
公开(公告)日：2021-06-15
申请号：US16566784
申请日：2019-09-10
Applicant: Apple Inc.
Inventor： Giovanni Saccomanno , Bogdan-Eugen Matei , Fabio Ongaro
Abstract: A power converter circuit that includes a switch node coupled to a regulated power supply node via an inductor may, in response an assertion of a control signal, source current to the regulated power supply node. In response to initiating a charge cycle, a control circuit may assert the control signal. During an assertion of the control signal, the control circuit may adjust a slope of a transition of the control signal using a voltage level of the switch node.
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公开(公告)号：US10425009B2
公开(公告)日：2019-09-24
申请号：US16113832
申请日：2018-08-27
Applicant: Apple Inc.
Inventor： Michael Couleur , Fabio Ongaro , Dashun Xue
IPC: H02M3/158
Abstract: A regulator circuit that employs coupled inductors with on-time modulation is disclosed. The regulator circuit includes a driver circuit coupled via first and second inductors to a power supply node of a load circuit, and may charge the power supply node via the first inductor for a first charging period, and charge the power supply node via the second inductor for a second charging period. A control circuit may determine durations of the first and second charging periods using respective pluralities of currents.
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