Linear LT3652HV采用太阳能的电池充电方案

Linear 公司的LT3652HV是完整的单片降压电池充电器,工作电压从4.95V到34V,具有恒压/恒流充电特性,最大充电电流可达2A.输入电压可采用太阳能峰值能量跟踪(MPPT),可并行使用以得到更大输出电流,固定频率1MHz,浮充电压精度达0.5%,充电电流精度5%,主要应用在太阳能,遥控监视,手提仪表,12V-24V汽车系统以及采用限流适配器的电池充电.本文介绍了LT3652HV主要特性, 方框图以及多种应用电路.

The LT.3652HV is a complete monolithic step-down battery charger that operates over a 4.95V to 34V input range. The LT3652HV provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A. The charger employs a 3.3V float voltage feedback reference, so any desired battery fl oat voltage up to 18V can be programmed with a resistor divider.

The LT3652HV employs an input voltage regulation loop, which reduces charge current if the input voltage falls below a programmed level, set with a resistor divider. When the LT3652HV is powered by a solar panel, the input regulation loop is used to maintain the panel at peak output power.
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