中图分类号： TN22 文献标识码： A DOI：10.16157/j.issn.0258-7998.200299 中文引用格式： 杜培德，李晓露，朱文锦，等. 一种模拟3 V锂电池供电的DC-DC设计[J].电子技术应用，2020，46(9)：47-50. 英文引用格式： Du Peide，Li Xiaolu，Zhu Wenjin，et al. DC-DC design of simulating 3 V lithium battery power supply[J]. Application of Electronic Technique，2020，46(9)：47-50.
DC-DC design of simulating 3 V lithium battery power supply
Du Peide，Li Xiaolu，Zhu Wenjin，Zhou Shengtao，Chu Zhujun，Li Yaqing
North Night Vision Technology Co.，Ltd.，Kunming 650217，China
Abstract： The image intensifier is usually powered by 3 V lithium batteries, as the battery voltage dropping, the change or adjustment of DC bias point may lead the internal high-voltage power supply output to be abnormal, which may cause the image tube to flicker, extinguish or highlight. Generally, the power supply characteristics of image intensifier is verified using a DC power supply with "Battery Simulating Function". This equipment has high power, multi functions and high price. The image intensifier needs little power, if the equipment is used, the utilization of the equipment will be so low that cause high cost of R&D. Based on the constant current source controlling LDO output, a DC-DC circuit which could simulate charging and discharging of 1.4 V~3.4 V batteries was designed. Software simulation and actual test results verified the output voltage can rise or fall linearly, and the rate could be adjusted in tens of milliseconds to hours. The function of simulating battery power supply is achieved. This circuit has low cost and its improved circuit can also be used for DC sweep analysis of power products in other applications.
Key words : simulating battery power supply; constant current source control; DC sweep analysis; image intensifier