公开(公告)号：US11088531B2

公开(公告)日：2021-08-10

申请号：US16563424

申请日：2019-09-06

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Muhamad Ridzuan Azizan ,  Macwien Krishnamurhti ,  Kow Chee Chong ,  Chen Kok Yeoh

IPC: H02H3/093 ,  H02H3/05 ,  H02H7/18

Abstract: A device, battery and method for spark detection based on transient currents is provided. The battery includes: a cell; an interface; a first protection circuit and a second protection circuit. The first protection circuit comprises a first switch between the cell and the interface. The second protection circuit comprises a second switch between the cell and the interface. The first protection circuit is configured to: measure a load current on the cell; and open the first switch according to a first delay time based on the measurement of the load current. The second protection circuit is configured to: measure a transient current on the cell above the load current; and open the second switch according to a second delay time, lower than the first delay time, based on the measurement of the transient current.

公开(公告)号：US10368167B2

公开(公告)日：2019-07-30

申请号：US15362070

申请日：2016-11-28

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Chen Kok Yeoh ,  Joo Yih See ,  Chin Seng Tan

IPC: H02J7/00 ,  H03F1/02 ,  H03F1/52 ,  H04R3/00 ,  H03F3/183 ,  H04R29/00

Abstract: An apparatus and method for controlling an audio power circuit. The audio power circuit includes an audio amplifier having a power input and a speaker connected to the audio amplifier. The audio power circuit also includes a control circuit configured to be connected to a battery and the power input and to control a supply of power to the power input. The audio power circuit further includes a thermal protection circuit connected between the audio amplifier and the speaker, the thermal protection circuit configured to generate a thermal protection signal and provide the same to the control circuit, wherein the control circuit is further configured to control the supply of power based on the thermal protection signal.

公开(公告)号：US20180152785A1

公开(公告)日：2018-05-31

申请号：US15362070

申请日：2016-11-28

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Chen Kok Yeoh ,  Joo Yih See ,  Chin Seng Tan

IPC: H04R3/00 ,  H02J7/00 ,  H03F1/52 ,  H03F3/183 ,  H03F1/02 ,  H04R29/00

CPC classification number: H04R3/007 ,  H02J7/0029 ,  H02J2007/0039 ,  H03F1/0216 ,  H03F1/52 ,  H03F3/183 ,  H03F2200/447 ,  H03F2200/78 ,  H04R29/001 ,  H04R2499/11

Abstract: An apparatus and method for controlling an audio power circuit. The audio power circuit includes an audio amplifier having a power input and a speaker connected to the audio amplifier. The audio power circuit also includes a control circuit configured to be connected to a battery and the power input and to control a supply of power to the power input. The audio power circuit further includes a thermal protection circuit connected between the audio amplifier and the speaker, the thermal protection circuit configured to generate a thermal protection signal and provide the same to the control circuit, wherein the control circuit is further configured to control the supply of power based on the thermal protection signal.