公开(公告)号：US20250112553A1

公开(公告)日：2025-04-03

申请号：US18480340

申请日：2023-10-03

Applicant: STMicroelectronics International N.V.

Inventor： Claudio Bona ,  Kien Beng Tan

IPC: H02M3/158 ,  H02J7/00 ,  H02M1/00

Abstract: According to an embodiment, a method of operating an M-level buck converter in a battery charging circuit is provided. The M-level buck converter includes 2×N×(M−1) number of transistors. M and N are greater than one. The method includes operating the M-level buck converter in a first mode of the battery charging circuit corresponding to a high-current charge mode. The method further includes operating the M-level buck converter in a second mode of the battery charging circuit corresponding to a low-current charge mode. In the first mode, 2×N×(M−1) number of transistors are switched ON and OFF. In the second mode, 2×(M−1) number of transistors are switched ON and OFF and 2×N×(M−1)−2×(M−1) number of transistors are fully deactivated.

公开(公告)号：US12008200B1

公开(公告)日：2024-06-11

申请号：US18169000

申请日：2023-02-14

Applicant: STMicroelectronics International N.V.

Inventor： Kien Beng Tan

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/04184 ,  G06F3/0446

Abstract: A method for operating a touch sensing panel includes a touchscreen controller determining a first plurality of excitation signals in accordance with a first plurality of codes, wherein a sum of the first plurality of codes is a sequence of numbers having a same absolute value and signs alternating between adjacent numbers in the sequence of numbers. The method further includes the touchscreen controller transmitting each of the first plurality of excitation signals to a respective transmitting (TX) touch sensor of the touch sensing panel simultaneously during a first time frame. The method further includes the touchscreen controller determining touch strengths in accordance with a first plurality of output signals received by a plurality of receiving (RX) touch sensors of the touch sensing panel during the first time frame.