公开(公告)号：US20180115025A1

公开(公告)日：2018-04-26

申请号：US15628109

申请日：2017-06-20

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Tsung-Wei Huang ,  Yu-Huei Lee ,  Chun-Jen Shih ,  Ruei-Hong Peng

IPC: H01M10/44 ,  H02J7/00 ,  G05F1/40

CPC classification number: H01M10/443 ,  G05F1/40 ,  H01M10/44 ,  H02J7/0052 ,  H02J7/0065 ,  H02J7/008 ,  H02J7/0091 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02M3/1588 ,  H02M2003/1586 ,  Y02B40/90 ,  Y02B70/1466

Abstract: A charger circuit for providing a charging power to a battery includes a power delivery unit and a power conversion circuit. The power conversion circuit includes at least one conversion switch coupled to an inductor, a front stage switch conducting a DC power generated by the power delivery unit to generate a mid-stage power, and a direct charging switch. In a switching charging mode, the conversion switch converts the mid-stage power to the charging current onto a charging node. In a direct charging mode, the power delivery unit regulates the DC current, and the front stage switch and the direct charging switch conduct the DC current onto the charging node. The body diodes of the front stage switch and the direct charging switch are reversely coupled, and the body diodes of the front stage switch and the conversion switch are reversely coupled, for blocking the parasitic body current.

公开(公告)号：US10177420B2

公开(公告)日：2019-01-08

申请号：US15628109

申请日：2017-06-20

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Tsung-Wei Huang ,  Yu-Huei Lee ,  Chun-Jen Shih ,  Ruei-Hong Peng

IPC: H02J7/04 ,  H02J7/16 ,  H01M10/44 ,  H02J7/00 ,  G05F1/40 ,  H02M3/158

Abstract: A charger circuit for providing a charging power to a battery includes a power delivery unit and a power conversion circuit. The power conversion circuit includes at least one conversion switch coupled to an inductor, a front stage switch conducting a DC power generated by the power delivery unit to generate a mid-stage power, and a direct charging switch. In a switching charging mode, the conversion switch converts the mid-stage power to the charging current onto a charging node. In a direct charging mode, the power delivery unit regulates the DC current, and the front stage switch and the direct charging switch conduct the DC current onto the charging node. The body diodes of the front stage switch and the direct charging switch are reversely coupled, and the body diodes of the front stage switch and the conversion switch are reversely coupled, for blocking the parasitic body current.