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公开(公告)号：US20140268900A1
公开(公告)日：2014-09-18
申请号：US13854805
申请日：2013-04-01
Applicant: APPLE INC.
Inventor： Yongxuan Hu , Keong W. Kam , Shimon Elkayam , Susan R. Schen
IPC: H02M1/44
CPC classification number: H02M1/44 , H02M3/158 , H02M3/33507
Abstract: A switched-mode power supply with reduced electromagnetic interference (EMI) is described. This switched-mode power supply includes a modulation circuit that continuously frequency modulates a control signal over a bandwidth associated with a spread-spectrum modulation signal. By frequency modulating the control signal in the switched-mode power supply, spectral content associated with a modulated switching signal is spread evenly over the bandwidth, thereby reducing the EMI.
Abstract translation: 描述了具有降低的电磁干扰（EMI）的开关式电源。 该开关式电源包括在与扩频调制信号相关的带宽上连续地对控制信号进行频率调制的调制电路。 通过对开关电源中的控制信号进行频率调制，与调制的开关信号相关联的频谱内容在带宽上均匀分布，从而降低EMI。
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公开(公告)号：US12047088B2
公开(公告)日：2024-07-23
申请号：US17804920
申请日：2022-06-01
Applicant: Apple Inc.
Inventor： Jose V Santos Martinez , Yongxuan Hu , Nileshbhai J Shah
CPC classification number: H03M1/1255 , G06F5/06 , H03M1/123 , H03M1/126 , H03M1/002 , H03M1/12 , H03M1/1265
Abstract: A data processing system can include a first IC including one or more A/D converters that receive analog inputs from one or more sensors and generate corresponding digital data, a second IC including one or more processing elements that operate on the digital data, and communication circuitry, coupled between the one or more A/D converters and processing elements, that includes a packetizer on the first IC that receives samples and sample data from the one or more A/D converters and assembles each sample and corresponding sample data into a packet, a primary physical interface on the first IC that communicates the packet to a secondary physical interface on the second IC, and a de-packetizer that on the second IC that receives the packet, de-packetizes it, and delivers the sample and sample data to the one or more processing elements.
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公开(公告)号：US10355514B2
公开(公告)日：2019-07-16
申请号：US15485078
申请日：2017-04-11
Applicant: Apple Inc.
Inventor： Stephen C. Terry , Nilay D. Jani , Bin Gu , Yongxuan Hu
Abstract: A wireless power transmitting device may transmit power wirelessly to a wireless power receiving device. The wireless power receiving device may be a portable electronic device with an array of wireless power receiving coils that receive wireless power from wireless power transmitting coils in the wireless power transmitting device. Each receiving coil in the array of wireless power receiving coils may be coupled to a respective rectifier. Control circuitry of the wireless power receiving device may be configured to determine which rectifiers to enable for synchronous rectification. The control circuitry may be configured to enable at least one rectifier based on the alternating-current voltages produced by each coil in the array of receiving coils. The control circuitry may also be configured to enable at least one rectifier based on the output current from each rectifier.
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公开(公告)号：US20180062416A1
公开(公告)日：2018-03-01
申请号：US15485078
申请日：2017-04-11
Applicant: Apple Inc.
Inventor： Stephen C. Terry , Nilay D. Jani , Bin Gu , Yongxuan Hu
Abstract: A wireless power transmitting device may transmit power wirelessly to a wireless power receiving device. The wireless power receiving device may be a portable electronic device with an array of wireless power receiving coils that receive wireless power from wireless power transmitting coils in the wireless power transmitting device. Each receiving coil in the array of wireless power receiving coils may be coupled to a respective rectifier. Control circuitry of the wireless power receiving device may be configured to determine which rectifiers to enable for synchronous rectification. The control circuitry may be configured to enable at least one rectifier based on the alternating-current voltages produced by each coil in the array of receiving coils. The control circuitry may also be configured to enable at least one rectifier based on the output current from each rectifier.
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公开(公告)号：US09490644B2
公开(公告)日：2016-11-08
申请号：US14481510
申请日：2014-09-09
Applicant: Apple Inc.
Inventor： Arthur H. Chang , Yongxuan Hu , Shimon Elkayam
IPC: H02J7/00
CPC classification number: H02J7/0052 , H02J7/0004 , H02J7/0065 , H02J7/007 , H02J2007/0059 , H02M3/1582
Abstract: During operation, the DC converter and a DC battery charger controller in a charger circuit transitions from a first error signal to a second error signal for use in charging a battery, wherein the first error signal and the second error signal, respectively, correspond to feedback sources in a plurality of feedback sources with a plurality of feedback sources. Then, the DC converter and a DC battery charger controller selects a gain and an impedance to ground of a damping circuit based on the selected second error signal, where the damping circuit applies the gain and the impedance to ground to the second error signal. Moreover, the DC converter and a DC battery charger controller selects one or more clamping voltages of a voltage-clamping circuit based on the selected second error signal, where the voltage-clamping circuit applies the one or more clamping voltages to an output from the damping circuit.
Abstract translation: 在操作期间，充电器电路中的DC转换器和DC电池充电器控制器从第一误差信号转换到用于对电池充电的第二误差信号，其中第一误差信号和第二误差信号分别对应于反馈 具有多个反馈源的多个反馈源中的源。 然后，DC转换器和DC电池充电器控制器基于所选择的第二误差信号选择阻尼电路的增益和接地阻抗，其中阻尼电路将增益和对地的阻抗施加到第二误差信号。 此外，DC转换器和DC电池充电器控制器基于所选择的第二误差信号选择钳位电路的一个或多个钳位电压，其中钳位电路将一个或多个钳位电压施加到来自阻尼的输出 电路。
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Patent Agency Ranking
公开(公告)号：US09484758B2
公开(公告)日：2016-11-01
申请号：US13801817
申请日：2013-03-13
Applicant: Apple Inc.
Inventor： Bin Chen , Mao Ye , Yongxuan Hu
CPC classification number: H02J7/0052 , G05F3/08 , H02J7/0065 , H02M3/1582 , H02M3/1588 , H02M3/285 , H02M2001/0006 , H02M2001/0032 , H03K2217/0063 , H03K2217/0081 , Y02B40/90 , Y02B70/1466 , Y02B70/16 , Y02T90/127
Abstract: The disclosed embodiments provide a synchronous switching converter that converts a DC input voltage into a DC output voltage. This synchronous switching converter includes a high-side switching MOSFET coupled between an input node and a first node. The converter also includes a low-side switching MOSFET coupled between the first node and a ground node and is in series with the high-side switching MOSFET. This converter additionally includes a bootstrap capacitor coupled to the high-side switching MOSFET to provide turn-on voltage for the high-side switching MOSFET. Furthermore, the converter includes a main refresh circuit coupled to the bootstrap capacitor and is configured to refresh the bootstrap capacitor during a first operating mode of the synchronous switching converter. Moreover, the converter includes an auxiliary refresh circuit coupled to the main refresh circuit and the bootstrap capacitor and is configured to refresh the bootstrap capacitor during a second operating mode of the converter.
Abstract translation: 所公开的实施例提供将DC输入电压转换为DC输出电压的同步开关转换器。 该同步开关转换器包括耦合在输入节点和第一节点之间的高侧开关MOSFET。 该转换器还包括耦合在第一节点和接地节点之间并与高侧开关MOSFET串联的低侧开关MOSFET。 该转换器还包括耦合到高侧开关MOSFET的自举电容器，以为高侧开关MOSFET提供导通电压。 此外，转换器包括耦合到自举电容器的主刷新电路，并且被配置为在同步开关转换器的第一操作模式期间刷新自举电容器。 此外，转换器包括耦合到主刷新电路和自举电容器的辅助刷新电路，并且被配置为在转换器的第二操作模式期间刷新自举电容器。
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公开(公告)号：US20140253051A1
公开(公告)日：2014-09-11
申请号：US13801241
申请日：2013-03-13
Applicant: APPLE INC.
Inventor： Yongxuan Hu , Mao Ye , Shimon Elkayam
IPC: H02J7/00
CPC classification number: H02J7/0077
Abstract: A system and method are described for charging a battery in a portable electronic device wherein the battery is charged using a constant-current, constant-voltage charging process. In described embodiments, a resistance is received for a current loop that includes a charger and the battery. Then, during a constant-current charging phase, a constant current is output from the charger until an output voltage of the charger reaches a target voltage. The target voltage includes a battery target voltage and a compensation voltage based on the received resistance and a charging current. When the output voltage of the charger reaches the target voltage, the charger switches from the constant-current phase to a constant-voltage phase. Then during the constant-voltage phase, the charger outputs the target voltage until the charging current drops below a minimum value at which time the charging process is complete.
Abstract translation: 描述了一种用于对便携式电子设备中的电池充电的系统和方法，其中使用恒流恒压充电过程对电池进行充电。 在所描述的实施例中，对于包括充电器和电池的电流回路接收电阻。 然后，在恒流充电阶段期间，从充电器输出恒定电流，直到充电器的输出电压达到目标电压。 目标电压包括基于所接收的电阻和充电电流的电池目标电压和补偿电压。 当充电器的输出电压达到目标电压时，充电器将从恒流阶段切换到恒定电压阶段。 然后在恒定电压阶段，充电器输出目标电压，直到充电电流下降到最小值，此时充电过程完成。
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18.发明申请公开(公告)号：US20140217959A1
公开(公告)日：2014-08-07
申请号：US13801817
申请日：2013-03-13
Applicant: APPLE INC.
Inventor： Bin Chen , Mao Ye , Yongxuan Hu
CPC classification number: H02J7/0052 , G05F3/08 , H02J7/0065 , H02M3/1582 , H02M3/1588 , H02M3/285 , H02M2001/0006 , H02M2001/0032 , H03K2217/0063 , H03K2217/0081 , Y02B40/90 , Y02B70/1466 , Y02B70/16 , Y02T90/127
Abstract: The disclosed embodiments provide a synchronous switching converter that converts a DC input voltage into a DC output voltage. This synchronous switching converter includes a high-side switching MOSFET coupled between an input node and a first node. The converter also includes a low-side switching MOSFET coupled between the first node and a ground node and is in series with the high-side switching MOSFET. This converter additionally includes a bootstrap capacitor coupled to the high-side switching MOSFET to provide turn-on voltage for the high-side switching MOSFET. Furthermore, the converter includes a main refresh circuit coupled to the bootstrap capacitor and is configured to refresh the bootstrap capacitor during a first operating mode of the synchronous switching converter. Moreover, the converter includes an auxiliary refresh circuit coupled to the main refresh circuit and the bootstrap capacitor and is configured to refresh the bootstrap capacitor during a second operating mode of the converter.
Abstract translation: 所公开的实施例提供将DC输入电压转换为DC输出电压的同步开关转换器。 该同步开关转换器包括耦合在输入节点和第一节点之间的高侧开关MOSFET。 该转换器还包括耦合在第一节点和接地节点之间并与高侧开关MOSFET串联的低侧开关MOSFET。 该转换器还包括耦合到高侧开关MOSFET的自举电容器，以为高侧开关MOSFET提供导通电压。 此外，转换器包括耦合到自举电容器的主刷新电路，并且被配置为在同步开关转换器的第一操作模式期间刷新自举电容器。 此外，转换器包括耦合到主刷新电路和自举电容器的辅助刷新电路，并且被配置为在转换器的第二操作模式期间刷新自举电容器。
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公开(公告)号：US20230198538A1
公开(公告)日：2023-06-22
申请号：US17804920
申请日：2022-06-01
Applicant: Apple Inc.
Inventor： Jose V Santos Martinez , Yongxuan Hu , Nileshbhai J Shah
CPC classification number: H03M1/1255 , H03M1/126 , H03M1/123 , G06F5/06
Abstract: A data processing system can include a first IC including one or more A/D converters that receive analog inputs from one or more sensors and generate corresponding digital data, a second IC including one or more processing elements that operate on the digital data, and communication circuitry, coupled between the one or more A/D converters and processing elements, that includes a packetizer on the first IC that receives samples and sample data from the one or more A/D converters and assembles each sample and corresponding sample data into a packet, a primary physical interface on the first IC that communicates the packet to a secondary physical interface on the second IC, and a de-packetizer that on the second IC that receives the packet, de-packetizes it, and delivers the sample and sample data to the one or more processing elements.
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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.
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