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公开(公告)号：US11381172B2
公开(公告)日：2022-07-05
申请号：US17065984
申请日：2020-10-08
Applicant: Apple Inc.
Inventor： Michael Couleur , Nicola Rasera , Siarhei Meliukh
Abstract: A control system with a voltage-to-time converter for combined buck-boost converter using a single inductor. The system includes a voltage-to-time converter circuit having first and second inputs coupled to receive first and second voltage signals, respectively. The voltage-to- time converter includes a comparator configured to compare the first voltage signal and the second voltage signal and to generate a comparator output signal at a first level if the first voltage is greater than the second voltage and at a second level if the second voltage is greater than the first voltage. The voltage-to-time converter further includes an output circuit configured to generate first and second output signals based on the comparator output signal. The output circuit is configured to provide a selected one of the first or second output signals at the first level for a duration dependent on a difference between respective voltages of the first and second voltage signals.
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2.发明授权公开(公告)号：US11349396B2
公开(公告)日：2022-05-31
申请号：US16747435
申请日：2020-01-20
Applicant: Apple Inc.
Inventor： Michael Couleur , Shawn Searles , Nikola Jovanovic
Abstract: A method and apparatus for operating a DC-DC converter in an interleaved (or rotating) pulse frequency modulation (PFM) mode is disclosed. A DC-DC converter includes a number of inductor pairs, with each inductor coupled to a corresponding pulse control circuit. During a cycle in which one of the pulse control circuits sources a current pulse through its respectively coupled inductor, a second pulse control circuit coupled to the other inductor of the pair determines if a voltage on its output node (e.g., where it is coupled to its inductor) is less than a threshold voltage. Responsive to determining that the voltage on its output node is less than the threshold, the second pulse control circuit activates a current path through the other inductor of the pair.
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公开(公告)号：US20220158555A1
公开(公告)日：2022-05-19
申请号：US16951678
申请日：2020-11-18
Applicant: Apple Inc.
Inventor： Nikola Jovanovic , Michael Couleur , Siarhei Meliukh
Abstract: A power converter is disclosed. The power converter is configured to provide a regulated output voltage. The power converter includes a first control loop configured to generate a first voltage based on a rate of change of the regulated output voltage. A second control loop is configured to generate a second voltage based on an output current provided by the power converter. An amplifier is configured to generate a third voltage based on the first and second voltages. A control circuit is configured to control the regulated output voltage based on the third voltage.
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4.发明申请公开(公告)号：US20210226536A1
公开(公告)日：2021-07-22
申请号：US16747435
申请日：2020-01-20
Applicant: Apple Inc.
Inventor： Michael Couleur , Shawn Searles , Nikola Jovanovic
Abstract: A method and apparatus for operating a DC-DC converter in an interleaved (or rotating) pulse frequency modulation (PFM) mode is disclosed. A DC-DC converter includes a number of inductor pairs, with each inductor coupled to a corresponding pulse control circuit. During a cycle in which one of the pulse control circuits sources a current pulse through its respectively coupled inductor, a second pulse control circuit coupled to the other inductor of the pair determines if a voltage on its output node (e.g., where it is coupled to its inductor) is less than a threshold voltage. Responsive to determining that the voltage on its output node is less than the threshold, the second pulse control circuit activates a current path through the other inductor of the pair.
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公开(公告)号：US10804803B1
公开(公告)日：2020-10-13
申请号：US16661913
申请日：2019-10-23
Applicant: Apple Inc.
Inventor： Michael Couleur , Nicola Rasera , Siarhei Meliukh
Abstract: A DC-DC converter that provides both buck and boost voltages using a single inductor is disclosed. The DC-DC converter includes an H-bridge circuit having an inductor having first and second terminals, and a number of switches. The switches include a first switch coupled between the second inductor terminal and a boost voltage node, a second switch coupled between the second inductor terminal and a buck voltage node, and a third switch coupled between the first inductor terminal and an input voltage node. A control circuit is coupled to activate the switches in accordance with a number of different phases such that a buck voltage (e.g., less than the input voltage) is provided on the buck voltage node, while a boost voltage (e.g., greater than the input voltage) is provided on the boost voltage node.
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Patent Agency Ranking
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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7.发明授权公开(公告)号：US11594967B2
公开(公告)日：2023-02-28
申请号：US17242012
申请日：2021-04-27
Applicant: Apple Inc.
Inventor： Michael Couleur , Nicola Rasera , Nikola Jovanovic , Pietro Gabriele Gambetta
Abstract: A hysteretic current control switching power converter with a clock-controlled switching frequency is disclosed. A power converter includes a switching circuit including a high side switch and a low side switch coupled to one another at a switching node, with an inductor being coupled between the switching node and a regulated supply voltage node. The power converter further includes a control circuit configured to alternately cause activation of the high side switch and the low side switch, wherein the control circuit is configured to activate the low side switch in response to a first voltage reaching peak threshold value, the first voltage corresponding to a current through the inductor. A ramp voltage circuit is configured to, in response to a clock signal, generate a ramp voltage, wherein the peak threshold value is based on the ramp voltage.
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公开(公告)号：US20210247827A1
公开(公告)日：2021-08-12
申请号：US16784605
申请日：2020-02-07
Applicant: Apple Inc.
Inventor： Michael Couleur , Nicola Rasera , Siarhei Meliukh
Abstract: A power converter circuit that includes a switch circuit, and multiple phase and amplifier circuits, may generate a voltage level on a regulated power supply node of a computer system. The amplifier circuits may generate respective demand currents using a voltage level of the regulated power supply node and a reference voltage. In response to activation of a multi-phase operating mode, the switch circuit may short the outputs of the amplifier circuits to generate a common demand current. The multiple phase circuits may sequentially source current to regulated power supply node using the common demand current.
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公开(公告)号：US20210126539A1
公开(公告)日：2021-04-29
申请号：US17065984
申请日：2020-10-08
Applicant: Apple Inc.
Inventor： Michael Couleur , Nicola Rasera , Siarhei Meliukh
IPC: H02M3/158
Abstract: A DC-DC converter that provides both buck and boost voltages using a single inductor is disclosed. The DC-DC converter includes an H-bridge circuit having an inductor having first and second terminals, and a number of switches. The switches include a first switch coupled between the second inductor terminal and a boost voltage node, a second switch coupled between the second inductor terminal and a buck voltage node, and a third switch coupled between the first inductor terminal and an input voltage node. A control circuit is coupled to activate the switches in accordance with a number of different phases such that a buck voltage (e.g., less than the input voltage) is provided on the buck voltage node, while a boost voltage (e.g., greater than the input voltage) is provided on the boost voltage node.
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公开(公告)号：US10884043B1
公开(公告)日：2021-01-05
申请号：US16517402
申请日：2019-07-19
Applicant: Apple Inc.
Inventor： Michael Couleur , Andrea Acquas , Nikola Jovanovic
Abstract: A power converter circuit included in a computer system may charge and discharge a switch node coupled to a regulated power supply node via an inductor. The power converter circuit may generate a reference clock signal using a system clock signal and a voltage level of the switch node. The reference clock signal may be used to initiate a charge cycle, whose duration may be based on generated ramp signals.
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