-
公开(公告)号：US20190341796A1
公开(公告)日：2019-11-07
申请号：US16125611
申请日：2018-09-07
Applicant: Apple Inc.
Inventor： Bin Gu , Yongxuan Hu , Stephen C. Terry , Di Zhao , Ruchi J. Parikh , Michael D. Black , Weiyun Chen
Abstract: An electronic device may receive or provide power using bidirectional wired and wireless power converters. A bypass path may be included to bypass the battery charger and to allow direct power transfers from a connector of the electronic device to the wireless power converter or from the wireless power converter to the connector of the electronic device. Current limiting and regulation circuitry may also be included.
-
公开(公告)号：US12191685B2
公开(公告)日：2025-01-07
申请号：US17447488
申请日：2021-09-13
Applicant: Apple Inc.
Inventor： Weiyun Chen , Di Zhao
Abstract: A battery powered electronic device can include a wireless power system configured to receive power from a wireless power transmitter, a converter coupled to the wireless power system that converts a voltage from the wireless power system to a battery charging voltage, a battery comprising at least two cells, a power management unit that delivers power from one or more of the at least two cells to one or more subsystems of the electronic device, and a plurality of switching devices connecting the at least two cells, the converter, and the power management unit. The plurality of switching devices can be arranged so that a first switching configuration connects the cells in series for charging from the converter and a second switching configuration connects the cells in parallel for delivering power to the power management unit.
-
公开(公告)号：US10998776B2
公开(公告)日：2021-05-04
申请号：US16748467
申请日：2020-01-21
Applicant: Apple Inc.
Inventor： Weiyun Chen , Stephen C. Terry
Abstract: A wireless power receiving device has a coil that receives wireless power signals from a wireless power transmitting device and has a rectifier that produces direct-current power across rectifier output terminals using the received wireless power signals. A load in the wireless power receiving device receives a direct-current output voltage from the rectifier output terminals. In-band communications are supported in which an amplitude-shift keying communications scheme or other communications scheme is used by a data transmitter in the wireless power receiving device to transmit in-band data through the coil. In-band data is transmitted by modulating one or more transistors that are coupled to the coil and other wireless power receiving circuitry in series with one or more capacitors and is transmitted by modulating current flow through a ballast transistor or other adjustable load that is coupled across the rectifier output terminals.
-
公开(公告)号：US20180219402A1
公开(公告)日：2018-08-02
申请号：US15812894
申请日：2017-11-14
Applicant: Apple Inc.
Inventor： Weiyun Chen
IPC: H02J7/02 , H02J50/10 , H02M7/5395
CPC classification number: H02J7/025 , H02J50/10 , H02J50/40 , H02J50/90 , H02M7/5395
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using a wireless power transmitting coil. The wireless power receiving device has a rectifier and a wireless power receiving coil that receives wireless power signals. The rectifier supplies an output power to a battery charger integrated circuit. The wireless power transmitting device measures input power supplied to an inverter. The inverter supplies drive signals to the wireless power transmitting coil with a duty cycle. The transmitting device uses information on the input power, output power, and a power level demanded by the battery charger integrated circuit to make duty cycle adjustments. The duty cycle adjustments are used to identify a duty cycle setting at which the input power is minimized while the power demanded by the battery charger integrated circuit is satisfied by the output power.
-
公开(公告)号：US20230006450A1
公开(公告)日：2023-01-05
申请号：US17447488
申请日：2021-09-13
Applicant: Apple Inc.
Inventor： Weiyun Chen , Di Zhao
Abstract: A battery powered electronic device can include a wireless power system configured to receive power from a wireless power transmitter, a converter coupled to the wireless power system that converts a voltage from the wireless power system to a battery charging voltage, a battery comprising at least two cells, a power management unit that delivers power from one or more of the at least two cells to one or more subsystems of the electronic device, and a plurality of switching devices connecting the at least two cells, the converter, and the power management unit. The plurality of switching devices can be arranged so that a first switching configuration connects the cells in series for charging from the converter and a second switching configuration connects the cells in parallel for delivering power to the power management unit.
-
Patent Agency Ranking
公开(公告)号：US11183864B2
公开(公告)日：2021-11-23
申请号：US16125611
申请日：2018-09-07
Applicant: Apple Inc.
Inventor： Bin Gu , Yongxuan Hu , Stephen C. Terry , Di Zhao , Ruchi J. Parikh , Michael D. Black , Weiyun Chen
Abstract: An electronic device may receive or provide power using bidirectional wired and wireless power converters. A bypass path may be included to bypass the battery charger and to allow direct power transfers from a connector of the electronic device to the wireless power converter or from the wireless power converter to the connector of the electronic device. Current limiting and regulation circuitry may also be included.
-
公开(公告)号：US20200328630A1
公开(公告)日：2020-10-15
申请号：US16748467
申请日：2020-01-21
Applicant: Apple Inc.
Inventor： Weiyun Chen , Stephen C. Terry
Abstract: A wireless power receiving device has a coil that receives wireless power signals from a wireless power transmitting device and has a rectifier that produces direct-current power across rectifier output terminals using the received wireless power signals. A load in the wireless power receiving device receives a direct-current output voltage from the rectifier output terminals. In-band communications are supported in which an amplitude-shift keying communications scheme or other communications scheme is used by a data transmitter in the wireless power receiving device to transmit in-band data through the coil. In-band data is transmitted by modulating one or more transistors that are coupled to the coil and other wireless power receiving circuitry in series with one or more capacitors and is transmitted by modulating current flow through a ballast transistor or other adjustable load that is coupled across the rectifier output terminals.
-
公开(公告)号：US20190074764A1
公开(公告)日：2019-03-07
申请号：US16121205
申请日：2018-09-04
Applicant: Apple Inc.
Inventor： Yongxuan Hu , Weiyun Chen , Stephen C. Terry , Chi Kin Ho , Norah E. Nakibuuka
Abstract: This disclosure describes a system and a method to limit (i.e., regulate) the input power of a power converter as a function of the voltage and/or loading condition of a power-limited source such as a battery. In some embodiments, the power converter may comprise a transconductance amplifier that may produce a sink current to a current mirror, which in turn that may provide an adjusted current limit threshold to the power converter. The power converter may utilize the current limit threshold to perform cycle-by-cycle current limiting, thus regulating the input power drawn from the battery.
-
公开(公告)号：US11095162B1
公开(公告)日：2021-08-17
申请号：US16930162
申请日：2020-07-15
Applicant: Apple Inc.
Inventor： Weiyun Chen , Stephen C. Terry
Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device and wireless power receiving device may include control circuitry that measures operating parameters. During wireless power transmission operations, the wireless power receiving device may periodically send feedback to the wireless power transmitting device such as in-band wireless power adjustment commands requesting that the wireless power transmitting device adjust the amount of power being transmitted from the wireless power transmitting device to the wireless power receiving device. Faster estimates of desired adjustments to the amount of transmitted power can be made by the wireless power transmitting device using real-time measurements of wireless power transmitting device coil current and wireless power transmitting device coil voltage.
-
公开(公告)号：US10938307B2
公开(公告)日：2021-03-02
申请号：US16121205
申请日：2018-09-04
Applicant: Apple Inc.
Inventor： Yongxuan Hu , Weiyun Chen , Stephen C. Terry , Chi Kin Ho , Norah E. Nakibuuka
Abstract: This disclosure describes a system and a method to limit (i.e., regulate) the input power of a power converter as a function of the voltage and/or loading condition of a power-limited source such as a battery. In some embodiments, the power converter may comprise a transconductance amplifier that may produce a sink current to a current mirror, which in turn that may provide an adjusted current limit threshold to the power converter. The power converter may utilize the current limit threshold to perform cycle-by-cycle current limiting, thus regulating the input power drawn from the battery.
-
-
-
-
-
-
-
-
-
Search Results
11
records
(took 0.01 seconds)
