| 一种基于复合运放的线性锂离子电池充电器 |
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| 引用本文： | 王松林,牟在鑫,来新泉,代国定.一种基于复合运放的线性锂离子电池充电器[J].微电子学,2008,38(1):111-115. |
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| 作者姓名： | 王松林 牟在鑫 来新泉 代国定 |
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| 作者单位： | 西安电子科技大学,电路CAD研究所,西安,710071 |
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| 摘 要： | 基于复合运放,设计了一款新颖的线性锂离子电池充电器.该充电器根据锂离子电池充电的特性,采用三阶段充电法,即涓流充电(预处理),恒流充电(快充),恒压充电(充满).仿真结果显示,在4.5 V电源电压下,充电器实现了涓流充电电流80 mA,恒流充电电流800 mA,及恒定电压4.2 V的充电过程.另外,设计中利用充电功率管的栅极寄生电容作为充电环路的补偿电容,节省了芯片成本和面积.
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| 关 键 词： | 锂离子电池 充电器 恒定电流 恒定电压 复合运放 线性 锂离子电池充电器 Amplifier Multiple Based Charger Battery 面积 成本 芯片 补偿电容 环路 寄生电容 栅极 充电功率 利用 充电过程 定电压 恒流充电 |
| 文章编号： | 1004-3365（2008）01-0111-05 |
| 收稿时间： | 2007-06-14 |
| 修稿时间： | 2007-08-27 |
A Linear Li-Ion Battery Charger Based on Multiple Amplifier |
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| WANG Song-lin,MU Zai-xin,LAI Xin-quan,DAI Guo-ding.A Linear Li-Ion Battery Charger Based on Multiple Amplifier[J].Microelectronics,2008,38(1):111-115. |
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| Authors: | WANG Song-lin MU Zai-xin LAI Xin-quan DAI Guo-ding |
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| Abstract: | A novel linear Li-ion battery charger based on differential amplifier with multiple inputs was designed. The charger supplies trickle current, large constant current and constant voltage to a Li-ion battery for safety charging. Experimental results show that the charger can provide trickle current of 80 mA, maximum charging current of 800 mA, and charging voltage of 4.2 V at 4. 5 V supply power. In this design, a gate parasitic capacitor for charging power transistor was used as compensating capacitor to save chip size and cost. |
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| Keywords: | Li-ion battery Charger Constant current Constant voltage |
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