公开(公告)号：US20210351586A1

公开(公告)日：2021-11-11

申请号：US16869620

申请日：2020-05-08

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： MUHAMAD RIDZUAN AZIZAN ,  CHEN KOK YEOH ,  WAI MUN LEE ,  MOHD FAISAL ABDULLAH ,  KOW CHEE CHONG ,  MACWIEN KRISHNAMURTHI

IPC: H02H9/02 ,  H02H1/00 ,  H02H3/08

Abstract: An apparatus and method for providing a selectively reduced voltage to a portable electronic device are disclosed. When a determination is made that an output voltage from a voltage source exceeds a predefined maximum permitted voltage, a plurality of circuitries, including an adaptive active current limiting circuitry, are enabled in order to derive the reduced voltage from the output voltage. The reduced voltage is at least at or below the predefined maximum permitted voltage and is supplied to the portable electronic device by battery circuitry that includes the active current limiting circuitry.

公开(公告)号：US20160191104A1

公开(公告)日：2016-06-30

申请号：US14585281

申请日：2014-12-30

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： CHEN KOK YEOH ,  FRIEDRICH JOSEF BOLLMANN ,  GENG XIANG LEE @ TITUS LEE ,  JOO YIH SEE

IPC: H04B1/40 ,  H03F1/52 ,  H03F3/21 ,  H03F3/183

CPC classification number: H03F3/183 ,  H03F1/52 ,  H03F1/523 ,  H03F3/185 ,  H03F3/21 ,  H03F3/2171 ,  H03F3/68 ,  H03F2200/03 ,  H03F2200/432

Abstract: An intrinsically safe audio power circuit includes redundant electronic fuses disposed between the power input of an audio power amplifier and the battery source of the portable two-way radio device. The electronic fuse circuits are connected in series with each other, and each electronic fuse circuit includes a series switch transistor that can shut off the flow of current between the battery and the audio power amplifier. Each electronic fuse circuit also includes a current sense portion, and when the current through the electronic fuse circuits reaches a current threshold, it will shut off its series switch transistor using an active bias circuit in order to ensure sufficiently rapid shut off.

Abstract translation: 本质安全的音频电源电路包括设置在音频功率放大器的电源输入和便携式双向无线电设备的电池源之间的冗余电子保险丝。 电子熔丝电路彼此串联连接，并且每个电子熔丝电路包括可以截止电池和音频功率放大器之间的电流的串联开关晶体管。 每个电子熔丝电路还包括电流感测部分，并且当通过电子熔丝电路的电流达到电流阈值时，它将使用有源偏置电路来切断其串联开关晶体管，以确保充分快速的切断。

公开(公告)号：US20220399614A1

公开(公告)日：2022-12-15

申请号：US17303961

申请日：2021-06-11

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： MUHAMAD RIDZUAN AZIZAN ,  KOW CHEE CHONG ,  MD REDUAN MD SAAD ,  CHEN KOK YEOH ,  MACWIEN KRISHNAMURTHI

IPC: H01M50/483

Abstract: A battery, method and battery operated portable communication device are provided with protection from excessive current and thermal conditions. A plurality of protection circuits are coupled in series within a common charge/discharge path of the battery. The first protection circuit is configured to block current by opening a switch in response to a voltage drop across the switch and a current sense resistor in the common charge/discharge path. The second protection circuit provides redundancy under conditions where the first switch might fail, where the second switch will block current through the current sense resistor.

公开(公告)号：US20210351600A1

公开(公告)日：2021-11-11

申请号：US16869627

申请日：2020-05-08

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： MUHAMAD RIDZUAN AZIZAN ,  CHEN KOK YEOH ,  WAI MUN LEE ,  MOHD FAISAL ABDULLAH ,  KOW CHEE CHONG ,  MACWIEN KRISHNAMURTHI

IPC: H02J7/00 ,  H01M2/22

Abstract: Battery circuitry forms part of apparatus for connecting a battery power source to a portable electronic device. The battery circuitry is configured to detect a transitioning of an enable signal, caused by actuation of a power switch, from a de-asserted state to an asserted state. In response to detecting the transitioning of the enable signal, the battery circuitry is further configured to open an electrical path within the battery circuitry. The path, when opened, connects the battery power source in a manner that permits powering on of the portable electronic device.