The device is designed to efficiently extract microwatts (µW) to milliwatts (mW) of power generated from a variety of high output impedance DC sources like photovoltaic (solar) or thermal electric generators (TEG) without collapsing those sources. The battery management features ensure that a rechargeable battery is not overcharged by this extracted power, or depleted beyond safe limits by a system load.
In addition to the highly efficient boosting charger, the bq25570 integrates a highly efficient, nano- power buck converter for providing a second power rail to systems such as wireless sensor networks.
Ultra Low Power DC-DC Boost Charger
Settings calculator link: https://github.com/ceech/BQ25570
Schematic Storage On the board there is a LiR 2032 socket. There are also two sockets for optional 2.7V super capacitors.
Dimensions of the board are: 38mm x 44mm
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