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    UNIVERSAL POWER ADAPTER
    12.
    发明申请
    UNIVERSAL POWER ADAPTER 审中-公开
    通用电源适配器

    公开(公告)号：US20150069956A1

    公开(公告)日：2015-03-12

    申请号：US14481493

    申请日：2014-09-09

    Applicant: Apple Inc.

    Inventor： Yongxuan Hu ,  Shimon Elkayam ,  Collin E. Connors ,  Liyu Yang

    IPC: H02J7/00

    CPC classification number: H02J7/0052 ,  H02J7/0004 ,  H02J7/0065 ,  H02J7/007 ,  H02J2007/0059 ,  H02M3/1582

    Abstract: A charger circuit includes an interface connector that may be coupled to a power adapter that provides an input signal having an input voltage, and a buck-boost converter circuit that may be coupled to a battery having a charging voltage. At a given time, the buck-boost converter circuit operates in a mode in a group of modes based on a control signal, where the group of modes may include at least a buck mode and a boost mode. In particular, the charger circuit includes control logic that generates the control signal based on the charging voltage and a charging capability of the power adapter. Thus, if the charging voltage suitably exceeds the input voltage, the buck-boost converter circuit may operate in the boost mode. However, if the charging voltage is approximately less than or equal to the input voltage, the buck-boost converter circuit may operate in the buck mode.

    Abstract translation: 充电器电路包括可以耦合到提供具有输入电压的输入信号的电源适配器的接口连接器，以及可以耦合到具有充电电压的电池的降压 - 升压转换器电路。 在给定时间，降压 - 升压转换器电路基于控制信号以一组模式工作，其中该组模式可以至少包括降压模式和升压模式。 特别地，充电器电路包括基于充电电压和电源适配器的充电能力产生控制信号的控制逻辑。 因此，如果充电电压适当地超过输入电压，则降压 - 升压转换器电路可以在升压模式下操作。 然而，如果充电电压大致小于或等于输入电压，则降压 - 升压转换器电路可以在降压模式下工作。

    Detection circuit for keyboard cable
    13.
    发明授权
    Detection circuit for keyboard cable 有权
    键盘电缆检测电路

    公开(公告)号：US08928246B2

    公开(公告)日：2015-01-06

    申请号：US13659885

    申请日：2012-10-24

    Applicant: Apple Inc.

    Inventor： Alejandro Lara Ascorra ,  Brad Lee Patton ,  Shimon Elkayam

    IPC: G05F1/00

    CPC classification number: H05B33/0842

    Abstract: One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an EEPROM to hardware registers prior to regular operation. A second method also transfers data from an EEPROM to registers. However, hardware registers can be overwritten with data accepted from a control bus, prior to regular operation. A keyboard driver IC can detect the presence or absence of a cable to an LED. If the cable is absent, the driver IC will not supply power for the LED. One embodiment of a keyboard and display backlight control system can be configured to allow substantially independent operation.

    Abstract translation: 显示器背光驱动器集成电路的一个实施例可被配置为以至少两种不同的方式进行操作。 第一种方法是在正常操作之前将数据从EEPROM传输到硬件寄存器。 第二种方法还将数据从EEPROM传输到寄存器。 但是，在正常操作之前，硬件寄存器可以被从控制总线接受的数据覆盖。 键盘驱动器IC可以检测到LED的电缆的存在或不存在。 如果电缆不存在，驱动器IC将不会为LED供电。 键盘和显示器背光控制系统的一个实施例可以被配置为允许基本独立的操作。

    Reconfigurable compensator with large-signal stabilizing network
    15.
    发明授权
    Reconfigurable compensator with large-signal stabilizing network 有权
    具有大信号稳定网络的可重构补偿器

    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。

    CHARGING A BATTERY IN A PORTABLE ELECTRONIC DEVICE
    16.
    发明申请
    CHARGING A BATTERY IN A PORTABLE ELECTRONIC DEVICE 审中-公开
    在便携式电子设备中充电电池

    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。

    ELECTROMAGNETIC SHIELDING FOR WIRELESS POWER TRANSFER SYSTEMS
    18.
    发明申请
    ELECTROMAGNETIC SHIELDING FOR WIRELESS POWER TRANSFER SYSTEMS 审中-公开

    公开(公告)号：US20180090974A1

    公开(公告)日：2018-03-29

    申请号：US15701224

    申请日：2017-09-11

    Applicant: Apple Inc.

    Inventor： Shimon Elkayam ,  Brandon R. Garbus ,  Christopher S. Graham ,  Karl Ruben F. Larsson

    IPC: H02J7/02 ,  H02J50/10 ,  H02J50/70 ,  H02J50/40

    CPC classification number: H02J7/025 ,  H01F38/14 ,  H02J50/10 ,  H02J50/40 ,  H02J50/70

    Abstract: Embodiments describe electromagnetic shielding for wireless charging systems. A wireless charging system includes a transmitter coil configured to generate a magnetic flux, a receiver coil positioned coaxial with the transmitter coil to receive the generated magnetic flux, where electrical interaction between the transmitter coil and the receiver coil generates electric fields, a transmitter shield positioned between the transmitter coil and the receiver coil to intercept some of the electric fields directed away from the transmitter coil and allow the magnetic flux to pass through the transmitter shield, and a receiver shield positioned between the transmitter shield and the receiver coil to intercept some of the electric fields directed away from the receiver coil and allow the magnetic flux to pass through the receiver shield.

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