TIBQ25504
Overview
The BQ25504 is an ultra-low power harvest management IC designed to efficiently acquire and manage energy from high-impedance sources like solar cells and thermal electric generators. It features a highly efficient boost converter that can start with an input voltage as low as 130mV, making it ideal for systems that must operate from milliwatts of power. The device manages energy storage in batteries or supercapacitors while providing over-voltage and under-voltage protection.
Why Choose This Part
The BQ25504 excels with an extremely low quiescent current of 330nA, ensuring that more harvested energy goes to the storage element rather than the IC itself. Its wide supply voltage range of 2.5V to 5.25V and integrated Maximum Power Point Tracking (MPPT) logic allow for optimized energy extraction across varying environmental conditions.
Applications
Key Specifications
Getting Started
Engineers should begin with the BQ25504EVM-674 evaluation module to test harvesting efficiency with specific transducers. Use the external resistor programmable features to set the MPPT sampling ratios and battery protection thresholds. Ensure that the storage capacitor or battery is connected before applying input power to the harvester to prevent unregulated voltage spikes.
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