A Fast and Highly Accurate Battery Charger With Accurate Built-In Resistance Detection

被引:15
作者
Jung, Young-Ho [1 ]
Jung, Jae-Hyung [1 ]
Jeong, Hoe-Eung [1 ]
Jung, Jae-Hoon [1 ]
An, Jae-Sung [1 ]
Ahn, Hyun-A. [1 ]
Hong, Seong-Kwan [1 ]
Kwon, Oh-Kyong [1 ]
机构
[1] Hanyang Univ, Seoul 04763, South Korea
关键词
Built-in resistance (BIR); charger; constant-current (CC) mode; constant-voltage (CV) mode; fast charging; CIRCUIT; MODEL;
D O I
10.1109/TPEL.2018.2830747
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This letter proposes a fast and highly accurate battery charger for mobile applications. The proposed battery charger accurately detects the built-in resistance (BIR) and determines the transition point from the constant-current (CC) to constant-voltage (CV) modes. It then maximizes and minimizes the durations of the CC and CV modes, respectively, thus reducing the battery charging time. In addition, the proposed charger accurately controls the charging current (IBAT) by employing an adaptive OFF-time-controlled switching charger. The proposed battery charger was fabricated using a 0.18-mu m standard CMOS process. The measurement results showed that with the use of the accurate BIR detection and adaptive OFF-time-control methods, the proposed charger reduced the total charging time by up to 41.2% and achieved IBAT ripple of 52 mA(p-p).
引用
收藏
页码:10051 / 10054
页数:4
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