BQ25505 is an Ultra-Low-Power Harvester Power Management IC with Boost Charger and Autonomous Power Multiplexer

This post sponsored by Texas Instruments.

BQ25505 by Texas Instruments is designed to efficiently extract the microwatts (µW) to miliwatts (mW) of power generated from a variety of DC energy-harvesting, high-impedance sources without collapsing them.

Sources may be photovoltaic (solar) or thermal electric generators (TEGs). The battery-management features of the BQ25505 device ensure that a secondary rechargeable battery is not overcharged by extracted power. Voltage is neither 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. The boost charger has a cold-start voltage of VIN ≥ 330 mV, as well as continuous energy harvesting from input sources as low as 100 mV. Energy may be stored to rechargeable Li-Ion batteries, thin-film batteries, super capacitors, or conventional capacitors. BQ25505 features a battery-good output flag with programmable threshold and hysteresis. It may be used to enable or disable system loads and warn attached microcontrollers of pending power loss. Device applications include energy harvesters, solar chargers, thermal electric generator harvesters, wireless sensor networks, environmental monitoring, bridge and structural health monitoring, smart building controls, portable and wearable health items, and entertainment system remote controls.

By: Rachel Kalina

For more information about this product, click here.
For detailed information about the tool mentioned above, click here.
To request a sample, click here.
To download a datasheet, click here.

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