ST SPV1040太阳能电池充电解决方案
ST公司的SPV1040是嵌入了MPPT的高效太阳能电池充电器,输入电压0.3V到5.5V,内部集成140 mΩ同步整流器, 120 mΩ功率开关,100kHz固定PWM频率,占空比有MPPT算法来控制,输出电压具有稳压,过流和超温保护,主要用在智能手机和GPS系统,无线手机,小型电器和传感器,手持媒体播放器(PMP),数码相机,玩具和手持保健设备.本文介绍了SPV1040主要特性, 方框图,典型应用电路,输出并联和串联连接图,以及太阳能电池充电器STEVAL-ISV006V2电路图和材料清单与PCB布局图.
High efficiency solar battery charger with embedded MPPT
The SPV1040 is a high efficiency, low power and low voltage monolithic step-up converter that operates over a 0.3 V to 5.5 V input voltage range which allows providing power supply to products using even down to one photovoltaic cell or fuel cells where the capability of handling low input voltages is of utmost importance.
Despite the variation of several conditions over the day (like irradiation, dirt, temperature, etc.) the SPV1040 allows to achieve the maximum efficiency in terms of power harvested from the cells and transferred to the output thanks to the embedded MPPT algorithm.
It employs an input voltage regulation loop, which fixes the charging battery voltage, set with a resistor divider and a maximum output current set with a current sense resistor according to charging current constraints.
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