This is a simple energy harvesting chip demo board, the chip is ADI's adp5090. It can harvest low-voltage, low-power (from 16 uW to 200 mW, voltage 0.38 V to 3.3 V) energy into rechargeable batteries. The undervoltage and overvoltage protection value can be adjusted by adjusting the resistor value, so that the chip can charge a variety of secondary batteries. The efficient mppt function balances the transmission power of the energy source and battery, ensuring the maximum utilization of energy while enabling the system to operate reliably for a long time. The humanized backup battery design is the strongest backing for the load circuit.
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