公开(公告)号：US20190386481A1

公开(公告)日：2019-12-19

申请号：US16289836

申请日：2019-03-01

Applicant: QUALCOMM Incorporated

Inventor： Kunhee CHO ,  Hector Ivan OPORTA ,  Zhaohui ZHU ,  Chunping SONG

IPC: H02H7/12 ,  H02M1/32 ,  H02H1/00 ,  G01R19/165

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for providing input current limiting and input over current protection for a power converter, such as a charge pump converter. One example method of power conversion generally includes sensing an average value associated with an input current for a power supply circuit, sensing an instantaneous value associated with the input current for the power supply circuit, limiting the input current when the sensed average value is greater than a first threshold, and activating over current protection for the power supply circuit when the sensed instantaneous value is greater than a second threshold.

公开(公告)号：US20210067041A1

公开(公告)日：2021-03-04

申请号：US16894491

申请日：2020-06-05

Applicant: QUALCOMM Incorporated

Inventor： Kunhee CHO ,  Sanghwa JUNG ,  Zhaohui ZHU ,  Chunping SONG

IPC: H02M3/158

Abstract: An apparatus for generating an output voltage across a load. The apparatus includes a first switching device; a second switching device coupled in series with the first switching device between an upper voltage rail and a lower voltage rail, wherein the upper voltage rail is configured to receive an input voltage; an inductor between a node between the first and second switching device and the load; a sensor configured to generate a control signal related to a current through the inductor; and a controller configured to operate the first and second switching devices to generate the output voltage based on the control signal.

公开(公告)号：US20190115829A1

公开(公告)日：2019-04-18

申请号：US16001073

申请日：2018-06-06

Applicant: QUALCOMM Incorporated

Inventor： Hector Ivan OPORTA ,  Zhaohui ZHU ,  Chunping SONG ,  William RADER

IPC: H02M3/07 ,  H02J7/00 ,  H02J7/02

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for powering up a charge pump converter and providing protection and soft-start circuitry therefor. One example charge pump converter generally includes a first transistor and a second transistor coupled in series between an input voltage node and an output voltage node of the charge pump converter, a first capacitive element having a first terminal coupled to a node between the first and second transistors, and a first switch coupled to the input voltage node, the first switch being configured to selectively enable a first drive circuit having an output coupled to a control terminal of the second transistor.