基于DS2712的USB接口镍氢电池充电器设计

摘要

随着USB接口的广泛应用,将其作为小功率消费类电子产品的电池充电电源十分便利,而新产品的不断涌现和USB接口标准的不断进步使电池充电器设计面临着新的机遇与挑战.在此回顾了USB接口和镍氢电池的特性,对比了基于线性稳压源和开关电源原理设计的充电器之间的差异,设计了一种以DS2712为充电控制器,使用USB接口作为电源的镍氢电池充电器.在此设计的USB接口镍氢电池充电器经硬件验证,实现了对一节镍氢电池的快速智能充电功能,充电过程稳定可靠.%Along with the wide application of USB interface, which is very convenient to be used as a battery charging power of the low power consumption electronic products, the battery charger design is facing new opportunities and challenges because of the emergence of new products and the progress of the USB interface standards. The characteristics of the USB interface and the Ni-MH batteries are reviewed in this paper. The differenc between the chargers designed on the basis of the principle of the linear regulator and switch power supply was compared. A Ni-MH battery charger with the USB interface as the power supply and DS2712 as the charging controller was designed. The Ni-MH battery charger with USB interface realized the quick smart charging function which was validated by the hardware. Its charging process is stable and reliable.