The bq25570 device is specifically 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, with voltage boosted, 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 (WSN) which have stringent power and operational demands. All the capabilities of bq25570 are packed into a small foot-print 20-lead 3.5-mm x 3.5-mm QFN package (RGR).
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|Number of series cells|
|Charge current (Max) (A)|
|Battery charge voltage (Min) (V)|
|Battery charge voltage (Max) (V)|
|Operating temperature range (C)|
|Package size: mm2:W x L (PKG)|
Over Voltage Protection
Under Voltage Protection
|-40 to 125|
|VQFN | 20|
|20VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 20)|