Other Parts Discussed in Thread: BQ25570
Hello,
I have purchased BQ25570 EVM to use as a power booster for RF energy harvesting. I am connecting a RF energy harvesting circuit to BQ25570 EVM and looking at the VSTOR output. The RF circuit is a voltage doubling circuit with 22 stages followed by a storage capacitor.
The issue that I am facing here is that without connecting the BQ25570 EVM, the voltage at the storage capacitor of harvesting circuit goes up to 4V.. But as soon I connect the circuit to BQ25570 EVM, I see that the voltage drops drastically to 300mV at the storage capacitor. I am assuming that there is some kind of load effect that is happening due to which there is drop in voltage. I am not sure reduce this load effect.
I have attached the circuit diagram of my energy harvesting circuit. Any helpful answers are appreciated.
Thank you