Harvest energy from piezo elements and store it in super capacitorDesigned by ceech in Slovenia
APPLICATIONS Piezoelectric Energy Harvesting Electro-Mechanical Energy Harvesting Low Power Battery Charging Wireless HVAC Sensors Mobile Asset Tracking Tire Pressure Sensors Battery Replacement f...Read More…
The board is an ultralow quiescent current power supply designed specifically for energy harvesting and/or low current step-down applications. It is designed to interface directly to a piezoelectric or alternative A/C power source, rectify a voltage waveform and store harvested energy on an external capacitor, bleed off any excess power via an internal shunt regulator, and maintain a regulated output voltage by means of a nanopower high efficiency synchronous buck regulator. A storage capacitor provides power when the input voltage source is unavailable.
A/C unrectified source from piezo can be connected at PZ1 and PZ2 inputs. Alternative, DC voltage (14V-20V) source connects to Vin and GND input pins.
The board has selectable power outputs. Output voltage level is selected on the two solder jumpers where the following combination is used:
1+3 Vout = 3.45V
2+3 Vout = 4.1V
1+4 Vout = 4.5V
2+4 Vout = 5V
In the above example 4.5V is selected.
Power Good Comparator
A power good comparator produces a logic high referenced to VOUT on the PGOOD pin the first time the converter reaches the sleep threshold of the programmed VOUT, signaling that the output is in regulation. The PGOOD pin will remain high until VOUT falls to 92% of the desired regulated voltage.
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