公开(公告)号：US10027107B2

公开(公告)日：2018-07-17

申请号：US15091100

申请日：2016-04-05

Applicant: Apple Inc.

Inventor： Robert M. Proie ,  Salvatore Reddiconto

IPC: H02H3/18 ,  H02H3/20 ,  H02H9/02 ,  H01L27/06 ,  H02H3/00

Abstract: A host electronic device may be coupled to an accessory electronic device. The host device and the accessory device may be connected via power supply lines and user data lines. If the host and accessory devices are improperly connected or if the accessory device is exposed to an incorrect voltage environment, the internal circuitry on the accessory device can be damaged. The accessory device may therefore include a reverse voltage protection circuit that can help prevent a large amount of current from inadvertently flowing into the accessory device. The protection circuit may include a low-side-enabled reverse current protection switch coupled between the external and internal ground terminals and also a single low-drop switch coupled to each of the user data lines. The low-drop switch will be activated whenever the voltage at the external ground terminal exceeds the voltage at the data line to help deactivate low-side-enabled reverse current protection switch.

公开(公告)号：US10732661B1

公开(公告)日：2020-08-04

申请号：US16569589

申请日：2019-09-12

Applicant: Apple Inc.

Inventor： Gregory B. Arndt ,  Salvatore Reddiconto

IPC: G05F3/26 ,  G05F3/30 ,  G05F3/22

Abstract: Aspects of the subject technology relate to a circuit for reducing random-telegraph noise in bandgap circuits. The circuit includes a number of diodes coupled in parallel at their respective first nodes to a ground potential. A number of switches are coupled to respective second nodes of the diodes. The circuit further includes a first resistor and a resistor voltage divider. The first node of the first resistor is coupled to a first node of a current source, and the first node of the resistor voltage divider is coupled to the first node of the current source. The switches are used to implement cyclic switching of the diodes in response to a train of pulses. An output voltage of the circuit is derived between a mid-node of the resistor voltage divider and a second node of the first resistor.

公开(公告)号：US10284089B2

公开(公告)日：2019-05-07

申请号：US15452411

申请日：2017-03-07

Applicant: Apple Inc.

Inventor： Salvatore Reddiconto ,  Dong Yang

IPC: H02M3/155 ,  H02M3/158 ,  H02M1/14

Abstract: According to some embodiments, a bi-directional converter is configured to operate in a boost mode or a buck mode. The bi-directional converter includes a hysteresis control unit that includes a comparator that can be configured to determine whether the reference voltage has a positive slope or a negative slope in conjunction with the bi-directional converter operating in boost mode or buck mode. In addition, the comparator is configured to compare a fractional load voltage to a reference voltage so that the output load voltage corresponds to the waveform shape of the reference voltage.

公开(公告)号：US20170288392A1

公开(公告)日：2017-10-05

申请号：US15091100

申请日：2016-04-05

Applicant: Apple Inc.

Inventor： Robert M. Proie ,  Salvatore Reddiconto

IPC: H02H3/20 ,  H01L27/06 ,  H02H9/02

CPC classification number: H02H3/20 ,  G06F1/266 ,  H01L27/0635 ,  H02H3/003 ,  H02H3/18 ,  H02H9/02 ,  H02H11/003

Abstract: A host electronic device may be coupled to an accessory electronic device. The host device and the accessory device may be connected via power supply lines and user data lines. If the host and accessory devices are improperly connected or if the accessory device is exposed to an incorrect voltage environment, the internal circuitry on the accessory device can be damaged. The accessory device may therefore include a reverse voltage protection circuit that can help prevent a large amount of current from inadvertently flowing into the accessory device. The protection circuit may include a low-side-enabled reverse current protection switch coupled between the external and internal ground terminals and also a single low-drop switch coupled to each of the user data lines. The low-drop switch will be activated whenever the voltage at the external ground terminal exceeds the voltage at the data line to help deactivate low-side-enabled reverse current protection switch.

公开(公告)号：US20160093921A1

公开(公告)日：2016-03-31

申请号：US14804121

申请日：2015-07-20

Applicant: Apple Inc.

Inventor： Karthik Kadirvel ,  Soundararajan Manthiri ,  Salvatore Reddiconto ,  Liquan Tan

IPC: H01M10/42 ,  H01M2/34 ,  H01M10/48 ,  H01M2/30 ,  H02J7/00 ,  G01R31/36

CPC classification number: H01M10/425 ,  G01R31/3835 ,  G01R31/396 ,  H01M2/30 ,  H01M2/34 ,  H01M10/48 ,  H01M2010/4271 ,  H01M2200/00 ,  H02J7/0021 ,  H02J7/0026 ,  H02J7/0031 ,  H02J7/0052 ,  H02J2007/0059

Abstract: A battery system has positive and negative pack terminals, and positive and negative sense terminals. An electrochemical cell assembly has positive and negative cell terminals. An electrically conductive power path has a positive leg that connects the positive cell terminal to the positive pack terminal, and a negative leg that connects the negative cell terminal to the negative pack terminal. A power switch circuit is connected in the power path. An electrically conductive sense path separate from the power path has a positive leg that connects the positive cell terminal to the positive sense terminal, and a negative leg that connects to the negative sense terminal. A sense switch circuit is connected in the sense path. Other embodiments are also described and claimed.

Abstract translation: 电池系统具有正负极端子，正极和负极端子。 电化学电池组件具有正和负电池端子。 导电功率路径具有将正极端子连接到正极端子的正极腿和将负极端子连接到负极端子的负极腿。 电源开关电路连接在电源通路中。 与功率路径分离的导电感测通路具有将正极端子连接到正极端子的正极腿和连接到负极端子的负极腿。 感测开关电路连接在感测路径中。 还描述和要求保护其他实施例。