公开(公告)号：US20150069958A1

公开(公告)日：2015-03-12

申请号：US14481524

申请日：2014-09-09

Applicant: Apple Inc.

Inventor： Liyu Yang ,  Yongxuan Hu ,  Shimon Elkayam

IPC: H02J7/00

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

Abstract: A charging circuit includes an interface connector that may be coupled to a power adapter that provides an input voltage, and a buck-boost charging circuit that receives the input voltage and may be coupled to and may provide an output signal to a battery having a charging voltage. For a given input voltage and a given charging voltage, the buck-boost charging circuit operates in one of a group of modes based on a control signal, where the group of modes comprises: a buck mode, a boost mode and a buck-boost mode. In particular, the charging circuit includes control logic that generates the control signal based on the charging voltage and the input voltage. Thus, the buck-boost charging circuit may operate over a continuous range of input voltages and charging voltages.

Abstract translation: 充电电路包括可以耦合到提供输入电压的电源适配器的接口连接器，以及接收输入电压的降压 - 升压充电电路，并且可以耦合到并且可以向具有充电的电池提供输出信号 电压。 对于给定的输入电压和给定的充电电压，降压 - 升压充电电路基于控制信号工作在一组模式中，其中模式组包括降压模式，升压模式和降压 - 升压 模式。 特别地，充电电路包括基于充电电压和输入电压产生控制信号的控制逻辑。 因此，降压 - 升压充电电路可以在连续的输入电压和充电电压范围内工作。

公开(公告)号：US20150069957A1

公开(公告)日：2015-03-12

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。

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。

公开(公告)号：US20130278171A1

公开(公告)日：2013-10-24

申请号：US13659888

申请日：2012-10-24

Applicant: APPLE INC.

Inventor： Alejandro Lara Ascorra ,  Shimon Elkayam ,  Asif Hussain ,  Brad Lee Patton ,  Steven J. Sfarzo ,  Eric G. Smith

IPC: H05B37/02

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。

公开(公告)号：US20130278170A1

公开(公告)日：2013-10-24

申请号：US13659885

申请日：2012-10-24

Applicant: APPLE INC.

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

IPC: H05B37/02

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。