公开(公告)号：US11557964B2

公开(公告)日：2023-01-17

申请号：US17334642

申请日：2021-05-28

Applicant: Qualcomm Incorporated

Inventor： Stuart Pullen ,  Jialei Xu ,  Chunping Song ,  Ta-Tung Yen

IPC: G05F1/10 ,  G05F3/02 ,  H02M3/07 ,  H03K3/037 ,  G06F1/12 ,  H03K5/24 ,  H02M1/14

Abstract: An apparatus is disclosed for operating a charge pump in a high-efficiency low-ripple burst mode. In an example aspect, the apparatus includes a charge pump with a flying capacitor, a switching circuit, and a burst-mode controller. The switching circuit is coupled to the flying capacitor and configured to selectively: be in a burst configuration to charge and discharge the flying capacitor based on a clock signal; or be in a pulse-skipping configuration. The burst-mode controller is coupled to the switching circuit and configured to trigger the switching circuit to transition from the pulse-skipping configuration to the burst configuration at a time that occurs between rising edges of the clock signal. The burst-mode controller is also configured to cause charging of the flying capacitor to occur for approximately half a period of the clock signal responsive to triggering the switching circuit to transition from the pulse-skipping configuration to the burst configuration.

公开(公告)号：US20210376719A1

公开(公告)日：2021-12-02

申请号：US17334642

申请日：2021-05-28

Applicant: Qualcomm Incorporated

Inventor： Stuart Pullen ,  Jialei Xu ,  Chunping Song ,  Ta-Tung Yen

IPC: H02M3/07 ,  H03K3/037 ,  H02M1/14 ,  H03K5/24 ,  G06F1/12

Abstract: An apparatus is disclosed for operating a charge pump in a high-efficiency low-ripple burst mode. In an example aspect, the apparatus includes a charge pump with a flying capacitor, a switching circuit, and a burst-mode controller. The switching circuit is coupled to the flying capacitor and configured to selectively: be in a burst configuration to charge and discharge the flying capacitor based on a clock signal; or be in a pulse-skipping configuration. The burst-mode controller is coupled to the switching circuit and configured to trigger the switching circuit to transition from the pulse-skipping configuration to the burst configuration at a time that occurs between rising edges of the clock signal. The burst-mode controller is also configured to cause charging of the flying capacitor to occur for approximately half a period of the clock signal responsive to triggering the switching circuit to transition from the pulse-skipping configuration to the burst configuration.

公开(公告)号：US10523042B2

公开(公告)日：2019-12-31

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: H01M10/44 ,  H01M10/46 ,  H02J7/16 ,  H02J7/00

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.

公开(公告)号：US10270342B2

公开(公告)日：2019-04-23

申请号：US15973787

申请日：2018-05-08

Applicant: QUALCOMM Incorporated

Inventor： Stuart Pullen ,  Michael Bui ,  Chunping Song ,  Jialei Xu

IPC: H02M3/156 ,  H02M3/158 ,  H02M1/088 ,  H02M1/00

Abstract: Certain aspects of the present disclosure provide methods and apparatus for current sensing and error correction, or at least adjustment, for a switching regulator. One example current-sensing circuit generally includes a first amplifier, a buffer, a low-pass filter, a first switch coupled between an output of the first amplifier and an input of the buffer, a second switch coupled between the output of the first amplifier and an input of the low-pass filter, a third switch coupled between an output of the buffer and the input of the low-pass filter, and a fourth switch coupled between the input of the low-pass filter and a reference node for the circuit.