This document describes a solar battery charger for single-cell Li-ion and Li-Pol batteries based on the SPV1040 and L6924D, capable of up to 5W power output. The SPV1040 is a solar boost converter with embedded maximum power point tracking (MPPT) algorithm, featuring high efficiency, low input voltage, and various protection features. The L6924D is a fully integrated linear charger solution with precise battery voltage regulation and multiple programmable charge modes. It also has temperature control, low battery leakage current, and flexible charge process termination.
The STEVAL-ISV012V1 is a demonstration board designed as an up to 5 W solar battery charger for single-cell Lithium-ion (Li-ion) and Li-Pol batteries. The solution integrates the SPV1040 solar boost converter with embedded maximum power point tracking (MPPT) and the L6924D fully integrated linear charger.
The device handles an input voltage range from 0.3 V to 5.5 V.
The device stops switching if the maximum temperature limit of up to 155 °C is exceeded.
The L6924D in this board is supplied by a 400 mW PV panel.