公开(公告)号：US20190252896A1

公开(公告)日：2019-08-15

申请号：US16167392

申请日：2018-10-22

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Tsung-Han Lee ,  Shun-Yu Huang ,  Chun-Kai Chang

IPC: H02J7/00

Abstract: A charging circuit includes a power conversion circuit, an inductor, and at least one conversion capacitor. The power conversion circuit includes a conversion switch circuit and a conversion control circuit. The conversion switch circuit includes an upper switch, a lower switch, and at least one auxiliary switch. In a switching conversion mode, the conversion control circuit operates the conversion switch circuit to switch the inductor to plural voltage levels repetitively for converting an input power to a charging power to charge a battery by switching power conversion. In a capacitive conversion mode, the conversion control circuit operates the conversion switch circuit to switch the conversion capacitor between two of voltage division nodes periodically for converting the input power to the charging power by capacitive power conversion.

公开(公告)号：US10714944B2

公开(公告)日：2020-07-14

申请号：US16167392

申请日：2018-10-22

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Jen Huang ,  Tsung-Han Lee ,  Shun-Yu Huang ,  Chun-Kai Chang

IPC: H02J7/00 ,  H02M3/00 ,  H02J7/02

Abstract: A charging circuit includes a power conversion circuit, an inductor, and at least one conversion capacitor. The power conversion circuit includes a conversion switch circuit and a conversion control circuit. The conversion switch circuit includes an upper switch, a lower switch, and at least one auxiliary switch. In a switching conversion mode, the conversion control circuit operates the conversion switch circuit to switch the inductor to plural voltage levels repetitively for converting an input power to a charging power to charge a battery by switching power conversion. In a capacitive conversion mode, the conversion control circuit operates the conversion switch circuit to switch the conversion capacitor between two of voltage division nodes periodically for converting the input power to the charging power by capacitive power conversion.