公开(公告)号：US20190120905A1

公开(公告)日：2019-04-25

申请号：US15789663

申请日：2017-10-20

Applicant: QUALCOMM Incorporated

Inventor： David WONG ,  Neal HOROVITZ ,  Ta-Tung YEN ,  Sanghwa JUNG ,  Cheong KUN ,  Kin Siu FUNG

IPC: G01R31/36 ,  H02J7/02 ,  H03K5/24 ,  H02J50/10 ,  H02J7/04

CPC classification number: H02J7/025 ,  G01R31/3648 ,  G01R31/382 ,  H02J7/04 ,  H02J50/10 ,  H02M3/158 ,  H03K5/24

Abstract: Enhanced reverse boosting detection in a wireless charging scheme is disclosed. In some implementations, a minimum mid-level input voltage regulation (VMID_MIN regulation) loop is provided to regulate an input voltage from a wirelessly coupled power source when a mid-level of the input voltage falls below a predetermined threshold. The input voltage is provided to a buck converter within a wireless charging receiver. An input missing poller signal generator is provided to generate an input missing poller (IMP) signal if the VMID_MIN regulation loop becomes active and the buck converter has entered a discontinuous mode.

公开(公告)号：US20180331564A1

公开(公告)日：2018-11-15

申请号：US15712770

申请日：2017-09-22

Applicant: QUALCOMM Incorporated

Inventor： Chunping SONG ,  Jialei XU ,  Stuart PULLEN ,  Steve HAWLEY ,  Neal HOROVITZ ,  Shashank Prakash MANE

IPC: H02J7/16 ,  H02J7/00

CPC classification number: H02J7/163 ,  G01R19/0092 ,  H02J7/0013 ,  H02J7/0024 ,  H02J7/0052 ,  H02J7/022 ,  H02J2007/0059 ,  H02J2007/0062

Abstract: Certain aspects of the present disclosure generally relate to reducing the size of parallel charging circuits for charging a battery in a portable device, while still effectively providing input current sensing and reverse current blocking capabilities. One example battery charging circuit generally includes: (1) a first charging circuit comprising a first charging output connectable to a battery and a first converter to provide power to the first charging output; and (2) a second charging circuit comprising a second charging output connectable to the battery, a second converter to provide power to the second charging output, a first transistor coupled between an output of the second converter and the second charging output, and a current-sensing circuit coupled to the output of the second converter to sense a current through the first transistor.