基于恒流/恒压方式的锂电池充电保护芯片设计  

Design and implementation of Li-ion battery charger IC based on constant-current/constant-voltage approach

作　　者：胡清琮[1] 陈琛[1] 王菁[1] 张鲁[1] 陈东坡[1] 梁斌[1] 何乐年[1] 

机构地区：[1]浙江大学超大规模集成电路研究所,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2008年第4期632-635,共4页Journal of Zhejiang University：Engineering Science

摘　　要：针对锂电池的充电保护问题,提出了一种基于恒流/恒压充电方式的充电器芯片的设计方法.电路采用电流镜结构为主体,以多控制参数竞争方法对输出PMOS管的栅极进行控制,实现了恒定电流充电、恒定电压充电和高温调节控制模式,以及各模式之间的平稳过渡.芯片采用CSMC公司的0.6μm双层多晶硅双层金属CMOS混合信号模型设计和流片.仿真及测试结果表明,该电路可实现各充电模式及模式之间的平稳过渡,充电完成后电池电压为4.14-4.22 V,满足±1%的精度要求.The design method of a charge circuit based on constant-current/constant-voltage （CC/CV） approach was presented in order to manage the charge process of Li-ion battery. Using current mirror as main structure and controlling the gate voltage of output PMOS transistor through the competence of multiple control parameters, the circuit fulfills the constant-current, constant-voltage and thermal regulation charge modes, and the smooth transitions between them. The chip was implemented using CSMC 0.6 μm 2p2m CMOS mix process. Simulation and test results verified the functions of the circuit to realize the required charge modes and the smooth transitions between them, and the battery voltage after charging was 4.14-4.22 V, fulfilling the accuracy of ±1%.

关 键 词：锂电池 充电保护 恒流/恒压模式 温度保护 

分 类 号：TN432[电子电信—微电子学与固体电子学]