学术
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4．5V电源电压下，充电器实现了涓流充电电流80mA，恒流充电电流800mA，及恒定电压4．2V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。[著者文摘]
文章出处:
《微电子学》-2008年38卷1期 -111-115页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1004-3365（2008）01-0111-05
A Linear Li-Ion Battery Charger Based on Multiple Amplifier
WANG Song-lin, MU Zai-xin, LAI Xin-quan, DAI Guo-ding （Institute of Electronic CAD, Xidian University, Xi＇an, Shanxi 710071, P. R. China）
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.[著者文摘]
Key words:
Li-ion battery; Charger; Constant current; Constant voltage
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