公开(公告)号：US20180331624A1

公开(公告)日：2018-11-15

申请号：US15973787

申请日：2018-05-08

Applicant: QUALCOMM Incorporated

Inventor： Stuart PULLEN ,  Michael BUI ,  Chunping SONG ,  Jialei XU

IPC: H02M3/158 ,  H02M1/088

CPC classification number: H02M3/158 ,  H02M1/088 ,  H02M3/156 ,  H02M3/1588 ,  H02M2001/0009

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.

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.

公开(公告)号：US20250088105A1

公开(公告)日：2025-03-13

申请号：US18465019

申请日：2023-09-11

Applicant: QUALCOMM Incorporated

Inventor： Sanghwa JUNG ,  Stuart PULLEN

IPC: H02M3/158 ,  H02M3/157

Abstract: Certain aspects of the present disclosure generally relate to techniques for operating a three-level buck converter. An example method for operating the three-level buck converter may include: identifying a voltage value based on an input voltage of the three-level buck converter; determining an emulated current for an inductive element of the three-level buck converter based on an expression having a variable associated with a voltage across a flying capacitive element of the three-level buck converter, wherein determining the emulated current comprises assuming the variable to have the voltage value; comparing the emulated current to a threshold; and controlling at least one transistor of the three-level buck converter based on the comparison.

公开(公告)号：US20190379270A1

公开(公告)日：2019-12-12

申请号：US16004536

申请日：2018-06-11

Applicant: QUALCOMM Incorporated

Inventor： Stuart PULLEN ,  Michael BUI ,  Steve HAWLEY ,  Chunping SONG

IPC: H02M1/00 ,  H02M3/158 ,  G11C27/02 ,  G01R31/40 ,  G01R19/00

Abstract: Methods and apparatus for current sensing and error correction in a switched-mode power supply composed of a high-side transistor coupled to a low-side transistor are described. One example method generally includes capturing a current associated with the low-side transistor at a first time corresponding to the low-side transistor turning off; capturing a current associated with the high-side transistor at a second time corresponding to a first delay after the high-side transistor turns on; capturing the current associated with the high-side transistor at a third time corresponding to the high-side transistor turning off; and applying a first correction current to a current-summing node of the current-sensing circuit for a first interval based on the first delay, wherein the first correction current is based on the captured current associated with the low-side transistor at the first time and on the captured current associated with the high-side transistor at the second time.

公开(公告)号：US20170222464A1

公开(公告)日：2017-08-03

申请号：US15273517

申请日：2016-09-22

Applicant: QUALCOMM Incorporated

Inventor： Stuart PULLEN ,  Steve HAWLEY ,  Thomas O'BRIEN

IPC: H02J7/00

CPC classification number: H02J7/0072 ,  G06F1/26 ,  G06F1/263 ,  G06F1/266 ,  H02J1/10 ,  H02J7/0052 ,  H02J7/0063 ,  H02J7/0068 ,  H02J7/025 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02J2007/0067 ,  H02M3/1584

Abstract: A multi-phase (e.g., dual-phase) concurrent configuration of a power management component supports higher current levels to peripheral devices while maintaining acceptable thermal limits. A dual-phase integrated circuit (IC) having a first input/output (I/O) port coupled to a battery and a second I/O port coupled to an adapter and a peripheral device implements the configuration. The dual phase IC includes a dual-phase voltage regulator that selectively provide power (i) from the first I/O port to the second I/O port to provide power to the peripheral device or (ii) from the second I/O port to the first I/O port to provide power to the battery. A controller activates a boost phase to power the second I/O port in response to detecting a demand current of the peripheral device exceeds a maximum current available from the adapter.

公开(公告)号：US20170222463A1

公开(公告)日：2017-08-03

申请号：US15270847

申请日：2016-09-20

Applicant: QUALCOMM Incorporated

Inventor： Stuart PULLEN ,  Steve HAWLEY ,  Thomas O'BRIEN

IPC: H02J7/00

CPC classification number: H02J7/0072 ,  H02J7/0052 ,  H02J7/04 ,  H02J7/045 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02M1/32 ,  H02M3/1588 ,  H02M2001/0045 ,  H02M2001/0048 ,  H03K7/08 ,  Y02B40/90 ,  Y02B70/1466 ,  Y02B70/1491

Abstract: A battery charging implementation improves the charging time (e.g., deliver a maximum or improved charge while minimizing or reducing power loss on the mobile device) by regulating a charging device duty cycle (e.g., buck duty cycle) of a switching regulator/converter (e.g., buck regulator) to a narrow range. An input voltage of a battery charging circuit is dynamically adjusted to maintain a duty cycle within a predetermined range. A battery is then charged in accordance with an output voltage of the battery charging circuit resulting from the adjusted duty cycle.