Multifunction drive circuit for lithiumion batteries based on SCM
LI Xia, XV Junming
(School of Electronic Information, Hangzhou Dianzi University, Hangzhou 310018, China)
Abstract: In order to solve the problems of functional unity and intelligent in lowpower portable lighting system, the SCM control technology was investigated. The application methods of the four circuit structure were analyzed, including the lithiumion battery charging circuit, LED driver circuit, mobile power driver circuit, and MCU control circuit. A method was presented to base on microprocessor controlled lithiumion battery multifunction drive circuit design methods. The whole performance was evaluated on the drive circuit with lighting, emergency lights, SOS signal functions, both for mobile phones and other digital devices to charge or standby power supply function, the sample of 8.4W portable LED drivers was tested. The experimental results show that the drive circuit has many advantages, such as charging circuit stability, functional diversification, very small line regulation, and which can work stable.
Key words: lithium ion battery; ATting13A; LED driver; single chip microcomputer(SCM)