公开(公告)号：US10177588B2

公开(公告)日：2019-01-08

申请号：US15598956

申请日：2017-05-18

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Tsung-Wei Huang ,  Shui-Mu Lin ,  Wei-Jen Huang ,  Hsien-Chih She ,  Teng-Cheng Chen

IPC: H02J7/00 ,  H02M3/06 ,  H02M3/07 ,  H02J7/02 ,  H02J7/10

Abstract: A charging circuit for providing a charging current to a battery includes a power delivery unit and a capacitive power conversion circuit. The power delivery unit converts an input power to a DC output voltage and current, and regulates the DC output current to a predetermined output current level. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches coupled to one or more capacitors, and a conversion control circuit which operates the plural conversion switches in plural conversion periods to connect the one or more capacitors between a pair of nodes selected from plural voltage division nodes, the DC output voltage, and a ground node periodically, so that the level of the charging current is scaled-up of the predetermined output current level.

公开(公告)号：US20180083456A1

公开(公告)日：2018-03-22

申请号：US15598956

申请日：2017-05-18

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Tsung-Wei Huang ,  Shui-Mu Lin ,  Wei-Jen Huang ,  Hsien-Chih She ,  Teng-Cheng Chen

IPC: H02J7/00 ,  H02M3/06

CPC classification number: H02J7/007 ,  H02J7/02 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02J2007/10 ,  H02M3/06 ,  H02M3/07

Abstract: A charging circuit for providing a charging current to a battery includes a power delivery unit and a capacitive power conversion circuit. The power delivery unit converts an input power to a DC output voltage and current, and regulates the DC output current to a predetermined output current level. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches coupled to one or more capacitors, and a conversion control circuit which operates the plural conversion switches in plural conversion periods to connect the one or more capacitors between a pair of nodes selected from plural voltage division nodes, the DC output voltage, and a ground node periodically, so that the level of the charging current is scaled-up of the predetermined output current level.