BQ25570 Energy Harvester Boost Charger Board

The BQ25570 Energy Harvester Module is a highly integrated power management solution designed for hobbyists, engineers, and IoT developers building ultra-low-power, self-sustaining systems such as wireless sensor networks, environmental monitors, and remote IoT devices. This module efficiently acquires and manages microwatts to milliwatts of power generated from DC sources such as photovoltaic solar panels and thermoelectric generators, making it ideal for energy harvesting applications.

The boost charger can start operating with an input voltage as low as 330mV, and once active, continues harvesting energy down to 100mV, allowing it to extract usable power from extremely weak energy sources. It also implements programmable maximum power point tracking (MPPT) to optimize the transfer of power into the device, improving overall harvesting efficiency. This raises voltage as low as 0.3V up to 3.3V or 5V through the boost converter while increasing collection efficiency by 30 to 50 percent.

Compatible with rechargeable batteries, supercapacitors, and thin-film batteries, this module is perfect for solar-powered sensors, energy-autonomous devices, and battery-free electronics projects. A valuable addition for any maker exploring sustainable, self-powered embedded systems.

Specification:

• Chip : BQ25570
• Input Voltage : 0.1V to 5.1V
• Output Voltage (BAT/OUT) : 2V to 5.5V
• Boost Start Voltage : 330mV (min)
• Function : Boost Charger + Buck Converter
• Compatible Sources : Solar, Thermoelectric, Piezoelectric