BQ25570 Boost Power Converter Module Ultra Low Power DC-DC Energy Harvesting Charger with MPPT Solar and Thermal Generator Input Li-ion Battery Protection Programmable Buck Output for Sensor Networks

Product Description:

The BQ25570 Boost Power Converter Energy Collector Module is designed to harvest and manage low-power energy from high-output-impedance DC sources. It combines a boost charging circuit for energy storage with a regulated buck output for low-power systems, including wireless sensor networks and monitoring applications.

Core Selling Points:

Efficiently extracts microwatts to milliwatts of power from photovoltaic solar sources, thermal electric generators, and other energy harvesters without collapsing the input source. Supports continuous energy harvesting from VIN as low as 100 mV and provides a 330 mV cold-start voltage. Integrated battery management helps prevent rechargeable batteries from overcharging or being depleted beyond safe limits. Programmable maximum power point tracking supports optimal energy extraction. The buck output offers efficiency up to 93% and supports peak output current up to 110 mA typical. Programmable output flags can warn microcontrollers of pending power loss and help enable or disable system loads. Full operating quiescent current is 488 nA typical, with ship mode drawing less than 5 nA from the battery.

Technical Specifications:

Model: BQ25570. Product type: Boost power converter, energy collector, boost charging, and buck conversion module. Energy storage support: Rechargeable Li-ion batteries, thin-film batteries, super-capacitors, or conventional capacitors. Charging and protection: Internally set undervoltage level, user-programmable overvoltage levels, and battery-good indication. Output: Programmable step-down regulated buck output. Output flag: Programmable threshold and hysteresis. Input regulation: Prevents high-impedance input sources from collapsing. MPPT: Programmable maximum power point tracking. Cold-start voltage: VIN 330 mV. Continuous energy harvesting: VIN as low as 100 mV. Buck efficiency: Up to 93%. Peak output current: Up to 110 mA typical. Full operating quiescent current: 488 nA typical. Ship mode battery current: Less than 5 nA.

Before Purchase:

This module is intended for low-power energy harvesting applications using high-output-impedance DC sources, such as photovoltaic solar panels, thermal electric generators, and piezoelectric generators. Confirm that the planned energy source can provide the stated cold-start and continuous-harvesting input conditions. Review the required battery or capacitor type, programmable voltage settings, buck output requirements, and system load before purchase.