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：US20210194358A1

公开(公告)日：2021-06-24

申请号：US17125571

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

Inventor： Yue JING ,  Sanghwa JUNG ,  David WONG

IPC: H02M3/07 ,  H02M1/36 ,  H02M3/158

Abstract: Certain aspects of the present disclosure generally relate to soft starting a switched-mode power supply (SMPS) circuit operating as a charge pump in a reverse multiply-by-two mode. One example SMPS circuit generally includes a plurality of transistors, a capacitive element coupled to the plurality of transistors, and a current sink coupled between the capacitive element and a reference potential node for the SMPS circuit. For certain aspects, the current sink is configured to be enabled during a first phase of a soft start operation for the SMPS circuit, but is configured to be disabled during a second phase of the soft start operation and during normal operation for the SMPS circuit.