公开(公告)号：US09966770B2

公开(公告)日：2018-05-08

申请号：US15255092

申请日：2016-09-01

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang ,  Pei Yu Chiang

IPC: H02J7/00

CPC classification number: H02J7/0021 ,  H02J7/0045 ,  H02J7/0052 ,  H02J7/007 ,  H02J7/0072 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02J2007/0096

Abstract: A charging apparatus includes a power conversion circuit for charging a battery, and a charging control circuit. The battery has a battery net voltage. The charging control circuit includes a conversion control circuit, a sensing circuit and a determining circuit. The conversion control circuit controls the power conversion circuit to generate plural pairs of DC output voltage levels and DC output current levels, wherein each DC output voltage level and its corresponding DC output current level are a voltage-current pair. The sensing circuit senses the DC output voltage levels and/or the DC output current levels. The determining circuit determines the battery net voltage according to plural voltage-current pairs.

公开(公告)号：US20170310136A1

公开(公告)日：2017-10-26

申请号：US15255092

申请日：2016-09-01

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Wei-Hsu Chang ,  Ta-Yung Yang ,  Pei Yu Chiang

IPC: H02J7/00

CPC classification number: H02J7/0021 ,  H02J7/0045 ,  H02J7/0052 ,  H02J7/007 ,  H02J7/0072 ,  H02J2007/0059 ,  H02J2007/0062 ,  H02J2007/0096

Abstract: A charging apparatus includes a power conversion circuit for charging a battery, and a charging control circuit. The battery has a battery net voltage. The charging control circuit includes a conversion control circuit, a sensing circuit and a determining circuit. The conversion control circuit controls the power conversion circuit to generate plural pairs of DC output voltage levels and DC output current levels, wherein each DC output voltage level and its corresponding DC output current level are a voltage-current pair. The sensing circuit senses the DC output voltage levels and/or the DC output current levels. The determining circuit determines the battery net voltage according to plural voltage-current pairs.