The bq25505 device is specifically designed to efficiently extract the microwatts (µW) to miliwatts (mW) of power generated from a variety of DC energy harvesting, high-impedance sources like photovoltaic (solar) or thermal electric generators (TEGs) without collapsing those sources. The battery-management features of the bq25505 ensure that a secondary rechargeable battery is not overcharged by this extracted power, with voltage boosted, nor depleted beyond safe limits by a system load. The integrated multiplexer gate drivers autonomously switch the system load to a primary nonrechargeable battery if the secondary battery voltage falls below the user-defined VBAT_OK threshold.
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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)|