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公开(公告)号：US11462950B2
公开(公告)日：2022-10-04
申请号：US16702372
申请日：2019-12-03
Applicant: Apple Inc.
Inventor： Antoin J. Russell , Bharat K. Patel , Manisha P. Pandya , Zaki Moussaoui
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. The measurement circuitry includes a measurement circuit that is coupled to the output circuit and that measures signals while oscillator circuitry supplies the output circuit with signals at a probe frequency. The measurement circuitry also includes a measurement circuit that is coupled to the output circuit and that measures signals while the oscillator circuitry sweeps signals applied to the output circuit between a first frequency and a second frequency to detect sensitive devices such as radio-frequency identification devices. Impulse response circuitry in the measurement circuitry is used to make inductance and Q factor measurements.
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公开(公告)号：US20210021117A1
公开(公告)日：2021-01-21
申请号：US16983953
申请日：2020-08-03
Applicant: Apple Inc.
Inventor： Paul J. Costa , Bharat K. Patel , Neal V. Cecil , Timur O. Starobinets , Ruenjou Lu , Dane Oleson , Fei Ni
Abstract: Circuits, methods, and apparatus that may provide power supply voltages in a safe and reliable manner that meets safety and regulatory concerns and does not exceed physical limitations of cables and other circuits and components used to provide the power supply voltages. One example may provide a cable having a sufficient number of conductors to provide power without exceeding a maximum current density for the conductors. Another example may provide a cable having more than the sufficient number of conductors in order to provide an amount of redundancy. Current sense circuits may be included for one or more conductors. When an excess current is sensed, a power source in the power supply may be shut down, the power source may be disconnected from one or more conductors, or both events may occur.
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公开(公告)号：US20180337549A1
公开(公告)日：2018-11-22
申请号：US15981814
申请日：2018-05-16
Applicant: Apple Inc.
Inventor： Liang Chen , Andrew Gray , Arunim Kumar , Zachary Strachan Harris , Antoin J. Russell , Bharat K. Patel , Saining Ren , Jerald Polestico Guillermo , Ron Rafer Floresca
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. Oscillator circuitry for supplying signals to the output circuitry while making measurements with the measurement circuitry is coupled to the output circuit using an impedance injection network. The impedance injection network includes an inductor and a resistor coupled in series. Control circuitry opens a transistor in the output circuit when making measurements with the measurement circuitry and closes the transistor when transmitting the wireless power signals.
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公开(公告)号：US20210099076A1
公开(公告)日：2021-04-01
申请号：US16586588
申请日：2019-09-27
Applicant: Apple Inc.
Inventor： InHwan Oh , Bharat K. Patel , Abby Cherian
Abstract: A power converter can include an input boost converter stage having an input configured to receive a rectified AC input voltage and an output configured to deliver a DC bus voltage and a second switching converter stage having an input configured to receive the DC bus voltage and an output configured to deliver a regulated output voltage. The input boost converter may be configured to be operated in a flat current mode to maintain a substantially constant DC bus voltage over a broad range of AC input voltages. The input boost converter may be further configured to be operated in an active blanking mode, wherein operation of the boost converter is prevented during a controlled blanking interval of each cycle of the rectified AC input voltage. The controlled blanking interval may be increased responsive at least in part to an increase in the AC input voltage and/or may be decreased responsive at least in part to a decrease in the AC input voltage.
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公开(公告)号：US20180337557A1
公开(公告)日：2018-11-22
申请号：US15967285
申请日：2018-04-30
Applicant: Apple Inc.
Inventor： Liang Chen , Andrew Gray , Arunim Kumar , Zachary Strachan Harris , Antoin J. Russell , Bharat K. Patel
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using output circuitry that includes an array of wireless power transmitting coils that form a wireless charging surface. During wireless power transmission operations, wireless power signals are transmitted from the array of coils to a wireless power receiving device on the charging surface. Inductance measurement circuitry such as impulse response measurement circuitry and other measurement circuitry is coupled to the output circuitry. Control circuitry in the wireless power transmitting device analyzes signals from the measurement circuitry to produce two-dimensional signal profiles across the wireless charging surface and to compare patterns in these signal profiles to predetermined signal patterns associated with the presence of known power receiving equipment on the wireless charging surface. Based on the analysis, charging parameters may be adjusted or other actions taken.
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Patent Agency Ranking
公开(公告)号：US09825481B2
公开(公告)日：2017-11-21
申请号：US13648131
申请日：2012-10-09
Applicant: Apple Inc.
Inventor： Kisun Lee , Bharat K. Patel , Abby Cherian
CPC classification number: H02J7/022 , H02J9/005 , H02M3/335 , H02M3/337 , H02M2001/0032 , Y02B70/16 , Y10T307/858
Abstract: The disclosed embodiments provide a system that facilitates operation of a power adapter in hiccup mode. The system includes a bleeding mechanism that reduces a hiccup time of the hiccup mode by increasing a leakage current of the power adapter. The system also includes an activation mechanism that activates the bleeding mechanism upon detecting a voltage drop associated with the hiccup mode.
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公开(公告)号：US20250038650A1
公开(公告)日：2025-01-30
申请号：US18360347
申请日：2023-07-27
Applicant: Apple Inc.
Inventor： Yantao Song , Abby Cherian , Qianlai Zhu , Joselito D. Parayno , Bharat K. Patel
Abstract: A power supply can include a bulk capacitor that receives a DC bus voltage; one or more DC-DC converters that convert the DC bus voltage to a DC output voltage; an inrush current limiting circuit that includes a resistor coupled in series with the bulk capacitor so as to limit an inrush current to the bulk capacitor; and a solid-state switching device that selectively bypasses the resistor once the bulk capacitor is charged; and control circuitry that operates the solid-state switching device to selectively bypass the resistor once the bulk capacitor is charged. The inrush current limiting circuit can further include a relay responsive to the control circuitry that selectively bypasses the resistor under high load conditions once the bulk capacitor is charged; and the control circuitry can further operate the solid-state switching device to selectively bypass the resistor once the bulk capacitor is charged under low load conditions.
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公开(公告)号：US10734799B2
公开(公告)日：2020-08-04
申请号：US15506698
申请日：2014-08-29
Applicant: Apple Inc.
Inventor： Paul J. Costa , Bharat K. Patel , Neal V. Cecil , Timur O. Starobinets , Ruenjou Lu , Dane Oleson , Fei Ni
Abstract: Circuits, methods, and apparatus that may provide power supply voltages in a safe and reliable manner that meets safety and regulatory concerns and does not exceed physical limitations of cables and other circuits and components used to provide the power supply voltages. One example may provide a cable having a sufficient number of conductors to provide power without exceeding a maximum current density for the conductors. Another example may provide a cable having more than the sufficient number of conductors in order to provide an amount of redundancy. Current sense circuits may be included for one or more conductors. When an excess current is sensed, a power source in the power supply may be shut down, the power source may be disconnected from one or more conductors, or both events may occur.
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公开(公告)号：US10320241B2
公开(公告)日：2019-06-11
申请号：US15967285
申请日：2018-04-30
Applicant: Apple Inc.
Inventor： Liang Chen , Andrew Gray , Arunim Kumar , Zachary Strachan Harris , Antoin J. Russell , Bharat K. Patel
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using output circuitry that includes an array of wireless power transmitting coils that form a wireless charging surface. During wireless power transmission operations, wireless power signals are transmitted from the array of coils to a wireless power receiving device on the charging surface. Inductance measurement circuitry such as impulse response measurement circuitry and other measurement circuitry is coupled to the output circuitry. Control circuitry in the wireless power transmitting device analyzes signals from the measurement circuitry to produce two-dimensional signal profiles across the wireless charging surface and to compare patterns in these signal profiles to predetermined signal patterns associated with the presence of known power receiving equipment on the wireless charging surface. Based on the analysis, charging parameters may be adjusted or other actions taken.
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公开(公告)号：US20180219430A1
公开(公告)日：2018-08-02
申请号：US15804145
申请日：2017-11-06
Applicant: Apple Inc.
Inventor： Antoin J. Russell , Bharat K. Patel , Manisha P. Pandya , Zaki Moussaoui
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. The measurement circuitry includes a measurement circuit that is coupled to the output circuit and that measures signals while oscillator circuitry supplies the output circuit with signals at a probe frequency. The measurement circuitry also includes a measurement circuit that is coupled to the output circuit and that measures signals while the oscillator circuitry sweeps signals applied to the output circuit between a first frequency and a second frequency to detect sensitive devices such as radio-frequency identification devices. Impulse response circuitry in the measurement circuitry is used to make inductance and Q factor measurements.
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