公开(公告)号：US10069423B2

公开(公告)日：2018-09-04

申请号：US15208333

申请日：2016-07-12

Applicant: Apple Inc.

Inventor： Asif Hussain ,  Nicholas A. Sims

IPC: H02M3/335 ,  H02M1/44 ,  H02M3/28 ,  H02M1/00 ,  H02M3/158

Abstract: A power supply with reduced electromagnetic interference (EMI) is described. This power supply includes cascaded stages with switched-mode power-supply circuits that are switched synchronously during operation by switching signals that have a common fundamental frequency. EMI associated with the power supply is reduced by establishing a phase shift between the switching signals in at least two of the stages.

公开(公告)号：US09977475B2

公开(公告)日：2018-05-22

申请号：US14831682

申请日：2015-08-20

Applicant: Apple Inc.

Inventor： InHwan Oh ,  Marco Soldano ,  Nicholas A. Sims ,  Manisha P. Pandya ,  Bogdan T. Bucheru

IPC: H02H3/20 ,  H02H9/04 ,  G06F1/26

CPC classification number: G06F1/26

Abstract: An electronic device has an I/O port, a bus connector and a transistor that is connected between the I/O port and a communications contact of the bus connector. A control circuit is connected to the transistor to maintain a gate voltage of the transistor independent of power supply voltage on a power supply contact of the connector. Other embodiments are also described and claimed.

公开(公告)号：US09866016B2

公开(公告)日：2018-01-09

申请号：US14793601

申请日：2015-07-07

Applicant: Apple Inc.

Inventor： Jeffrey J. Terlizzi ,  Nicholas A. Sims

IPC: H02J1/00 ,  H02J1/08 ,  H02J1/14 ,  H02J7/00 ,  H02J7/04 ,  H02J9/00

CPC classification number: H02J1/00 ,  H02J1/08 ,  H02J1/14 ,  H02J7/0027 ,  H02J7/0036 ,  H02J7/045 ,  H02J9/005 ,  H02J2007/0062 ,  Y10T307/414

Abstract: Power converters are provided that convert alternating current (AC) power to direct current (DC) power. A power converter may have multiple ports. Each port may have an associated connector with multiple power and data terminals. When an electronic device is connected to a given port, the electronic device draws DC power from the power converter. To ensure that the capacity of the power converter is not exceeded when multiple devices are connected to the ports of the power converter, the power converter may actively monitor its ports for active loads. Load detection circuitry can determine what number of ports are active. Control circuitry can compute a per-port available DC power level based on the number of active ports and can provide this information to connected devices.

公开(公告)号：US09391524B2

公开(公告)日：2016-07-12

申请号：US13720811

申请日：2012-12-19

Applicant: Apple Inc.

Inventor： InHwan Oh ,  Nicholas A. Sims

IPC: H02M3/335 ,  H02M1/42 ,  H02M7/217

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M1/14 ,  H02M1/4241 ,  H02M1/4258 ,  H02M1/44 ,  H02M7/217 ,  Y02B70/126 ,  Y02B70/1441

Abstract: The disclosed embodiments provide an AC/DC power converter that converts an AC input voltage into a DC output voltage. This AC/DC power converter includes an input rectifier stage which rectifies an AC input voltage into a first rectified voltage. The AC/DC power converter also includes a switching resonant stage which is directly coupled to the output of the input rectifier stage. The switching resonant stage converts the rectified voltage into a first high frequency AC voltage of a first amplitude. This AC/DC power converter additionally includes a transformer which is coupled to the output of the switching resonant stage and is configured to down-convert the first high frequency AC voltage into a second high frequency AC voltage of a second amplitude. Furthermore, the AC/DC power converter includes an output rectifier stage which is coupled to the output of the transformer, wherein the output rectifier stage rectifies the second high frequency AC voltage into a DC output voltage.

Abstract translation: 所公开的实施例提供将AC输入电压转换为DC输出电压的AC / DC功率转换器。 该AC / DC电力转换器包括将AC输入电压整流为第一整流电压的输入整流级。 AC / DC功率转换器还包括直接耦合到输入整流级的输出的开关谐振级。 开关谐振级将整流电压转换为第一幅度的第一高频AC电压。 该AC / DC功率转换器还包括耦合到开关谐振级的输出的变压器，并且被配置为将第一高频AC电压下变频为第二幅度的第二高频AC电压。 此外，AC / DC功率转换器包括耦合到变压器的输出的输出整流器级，其中输出整流器级将第二高频AC电压整流为DC输出电压。

公开(公告)号：US20130242621A1

公开(公告)日：2013-09-19

申请号：US13705476

申请日：2012-12-05

Applicant: APPLE INC.

Inventor： Asif Hussain ,  Nicholas A. Sims

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M1/44 ,  H02M3/1584 ,  H02M3/285 ,  H02M3/33515 ,  H02M3/33561 ,  H02M2001/007 ,  H02M2001/008 ,  H02M2001/009

Abstract: A power supply with reduced electromagnetic interference (EMI) is described. This power supply includes cascaded stages with switched-mode power-supply circuits that are switched synchronously during operation by switching signals that have a common fundamental frequency. EMI associated with the power supply is reduced by establishing a phase shift between the switching signals in at least two of the stages.

Abstract translation: 描述了具有降低的电磁干扰（EMI）的电源。 该电源包括级联级，其中开关模式电源电路在操作期间通过切换具有共同基频的信号同步地切换。 通过在至少两个级中的开关信号之间建立相移来减小与电源相关联的EMI。