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公开(公告)号：US20210273562A1
公开(公告)日：2021-09-02
申请号：US16805577
申请日：2020-02-28
Applicant: Apple Inc.
Inventor： Erhan Ozalevli , Yanhui Xie , Dharmesh C. Bhagatwala
Abstract: Embodiments relate to a switching regulator having a dual mode control. The switching regulator includes an error amplifier configured to receive an output voltage of a power source, and to generate an error voltage based on a difference between the output voltage of the power source and a reference voltage. The switching regulator additionally includes a PFM controller configured to receive the error voltage from the error amplifier, and to generate a clock signal having a switching frequency based on a difference between the error voltage and a modulation voltage. Moreover, the switching regulator includes a PWM controller configured to receive the clock signal and an error signal determined based on a load current sensed at an output of the power source, and to generate a control signal to control the power source.
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公开(公告)号：US10859603B1
公开(公告)日：2020-12-08
申请号：US16734017
申请日：2020-01-03
Applicant: Apple Inc.
Inventor： Erhan Ozalevli , Evaldo M. Miranda, Jr. , Behzad Mohtashemi
IPC: H03K17/082 , G01R15/14 , H03F3/45
Abstract: Embodiments relate to sensing a current provided by a power supply circuit. The current sensing circuit includes a sense transistor for sensing the current provided by a main transistor, a driver for controlling a bias provided to the sense transistor and the main transistor, and a sense resistor for converting the sensed current to a voltage value. Moreover, the current sensing circuit includes a controller that modifies at least one of: (a) a resistance of the main transistor by adjusting the bias voltage provided by the driver, (b) a gain ratio between a load current and a sensing current by adjusting a number of individual devices that are active in the sense transistor, and (c) a resistance of the sense resistor.
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公开(公告)号：US11588455B2
公开(公告)日：2023-02-21
申请号：US17204873
申请日：2021-03-17
Applicant: Apple Inc.
Inventor： Erhan Ozalevli
Abstract: An amplifier circuit includes multiple transistors, a set of input routing circuits, and a set of output routing circuits. Each output routing circuit corresponds to an input routing circuit. Each input routing circuit and its corresponding output routing circuit are controlled by one or more control signals. Each input routing circuit is configured to selectively connect each transistor of a transistor pair to a first input terminal of the amplifier circuit, a second input terminal of the amplifier circuit, or a third input terminal of the amplifier based on a value of the one or more control signals. Each output routing circuit is configured to selectively connect each transistor of the transistor pair to a first output terminal of the amplifier circuit, a second output terminal of the amplifier circuit, or a calibration circuit based on the value of the one or more control signals.
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公开(公告)号：US11342842B2
公开(公告)日：2022-05-24
申请号：US16805577
申请日：2020-02-28
Applicant: Apple Inc.
Inventor： Erhan Ozalevli , Yanhui Xie , Dharmesh C. Bhagatwala
Abstract: Embodiments relate to a switching regulator having a dual mode control. The switching regulator includes an error amplifier configured to receive an output voltage of a power source, and to generate an error voltage based on a difference between the output voltage of the power source and a reference voltage. The switching regulator additionally includes a PFM controller configured to receive the error voltage from the error amplifier, and to generate a clock signal having a switching frequency based on a difference between the error voltage and a modulation voltage. Moreover, the switching regulator includes a PWM controller configured to receive the clock signal and an error signal determined based on a load current sensed at an output of the power source, and to generate a control signal to control the power source.
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公开(公告)号：US11237191B2
公开(公告)日：2022-02-01
申请号：US17092158
申请日：2020-11-06
Applicant: Apple Inc.
Inventor： Erhan Ozalevli , Evaldo M. Miranda, Jr. , Behzad Mohtashemi
IPC: G01R15/14 , H03K17/082 , H03F3/45
Abstract: Embodiments relate to sensing a current provided by a power supply circuit. The current sensing circuit includes a sense transistor for sensing the current provided by a main transistor, a driver for controlling a bias provided to the sense transistor and the main transistor, and a sense resistor for converting the sensed current to a voltage value. Moreover, the current sensing circuit includes a controller that modifies at least one of: (a) a resistance of the main transistor by adjusting the bias voltage provided by the driver, (b) a gain ratio between a load current and a sensing current by adjusting a number of individual devices that are active in the sense transistor, and (c) a resistance of the sense resistor.
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Patent Agency Ranking
公开(公告)号：US20210305955A1
公开(公告)日：2021-09-30
申请号：US17204873
申请日：2021-03-17
Applicant: Apple Inc.
Inventor： Erhan Ozalevli
IPC: H03F3/45
Abstract: An amplifier circuit includes multiple transistors, a set of input routing circuits, and a set of output routing circuits. Each output routing circuit corresponds to an input routing circuit. Each input routing circuit and its corresponding output routing circuit are controlled by one or more control signals. Each input routing circuit is configured to selectively connect each transistor of a transistor pair to a first input terminal of the amplifier circuit, a second input terminal of the amplifier circuit, or a third input terminal of the amplifier based on a value of the one or more control signals. Each output routing circuit is configured to selectively connect each transistor of the transistor pair to a first output terminal of the amplifier circuit, a second output terminal of the amplifier circuit, or a calibration circuit based on the value of the one or more control signals.
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公开(公告)号：US11863058B2
公开(公告)日：2024-01-02
申请号：US17484941
申请日：2021-09-24
Applicant: Apple Inc.
Inventor： Erhan Ozalevli
CPC classification number: H02M1/0032 , H02M1/0009 , H02M1/0025 , H02M3/158
Abstract: A power converter circuit is disclosed. In one embodiment, the power converter includes a switching circuit coupled to an input power supply node and a regulated power supply node via an inductor, wherein the switching circuit is configured to source respective charge current to the regulated power supply node during a plurality of active cycles. The power converter further includes a control circuit configured to determine, for a particular active cycle, an average inductor current. The control circuit is further configured to perform a comparison of the average inductor current to a threshold value. Based on results of the comparison, the control circuit is configured to deactivate the switching circuit for a different active cycle subsequent to the particular active cycle. Two methods are disclosed to identify mode transitions, depending on conditions such as minimum time on and discontinuous current mode.
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公开(公告)号：US11609250B2
公开(公告)日：2023-03-21
申请号：US17033555
申请日：2020-09-25
Applicant: Apple Inc.
Inventor： Erhan Ozalevli
IPC: G01R19/165 , G01R21/133 , H03M3/04 , H02M3/04
Abstract: Embodiments relate to a power monitoring circuit. The power monitoring circuit includes a divider circuit that generates a reference voltage that is inversely proportional to a regulator voltage. Moreover, the power monitoring circuit includes an integrator that generates an integrator voltage by integrating one or more regulator currents. The power monitoring circuit additionally includes a comparator for comparing the output of the divider circuit and the output of the integrator. The comparator of the power monitoring circuit generates an output signal in response to the integrator voltage being larger than the reference voltage.
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公开(公告)号：US20220099713A1
公开(公告)日：2022-03-31
申请号：US17033555
申请日：2020-09-25
Applicant: Apple Inc.
Inventor： Erhan Ozalevli
IPC: G01R19/165 , G01R21/133
Abstract: Embodiments relate to a power monitoring circuit. The power monitoring circuit includes a divider circuit that generates a reference voltage that is inversely proportional to a regulator voltage. Moreover, the power monitoring circuit includes an integrator that generates an integrator voltage by integrating one or more regulator currents. The power monitoring circuit additionally includes a comparator for comparing the output of the divider circuit and the output of the integrator. The comparator of the power monitoring circuit generates an output signal in response to the integrator voltage being larger than the reference voltage.
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公开(公告)号：US10512130B1
公开(公告)日：2019-12-17
申请号：US16265401
申请日：2019-02-01
Applicant: Apple Inc.
Inventor： Erhan Ozalevli , Behzad Mohtashemi
Abstract: LED backlight circuits for a display and methods for operating the circuits are disclosed. The LED backlight circuit includes a set of drivers and a set of LED strings. A driver can be capable of coupling to any of the LED strings at a given time. Examples of the disclosure can include different configurations of drivers. In some instances, the driver may include an auxiliary transistor that allows the driver to settle before being switched to control a respective LED string. In some examples, the driver can include switches and an idle transistor that can be operated such that a low current path through the driver can exist when the driver is not coupled to a LED string.
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