Part Number:BQ25570
Dear Texas Instruments Employees and forum users,
I am working on triboelectric nanogenerators for energy harvesting and would like to measure the output of our prototypes in an automated way.
For now, we track the voltage output of the prototype that is plugged in series with analogue load resistances and measure the voltage drop across the resistances with an oscope. This helps us to track the maximum power point (MPP) of the prototype and determine the internal impedance of the devices. The authors of all scientific papers (see attached graphs as an example, source:advances.sciencemag.org/.../e1700015) we have screened perform this MPP tracking manually.
However, this just takes very long, which is why I would like to ask for your assistance in finding an automated solution. I am sure many Universities located in the US or China and also companies would be happy to have such a solution. We are in particular interested in the resistance range of 1-10MOhm and below. Digital potentiometers usually do not have a maximum resistance above 1MOhm and also have high manufacturing tolerances. The energy harvesters output an voltage of around 700V and a current of around 10-50 µA.
It would also be very helpful if you could recommend me a power management IC that is capable of rectifying, down-stepping and charging a battery/capacitor bank with a voltage in the microcontroller range.
Thanks in advance and best regards,
Marco