Hello
I use the BQ25505evm board to evaluate the BQ25505 for my actual application. It is a sensor node with one battery(LiFePo4) that is calculated to be never empty and the load should always directly be connected to the load. At the input there is a small solar cell.
So I thought, that I connect the load and the Battery to the VBAT_SEC output. But a bit confuses me is what I need to do with VSTORE..?
When I just connect the (fully loaded) battery to VBAT_SEC the BQ25505 is in cold_start mode an can only hardly exit it. Why is then VSTORE not supplied by the battery? Do I really need to manually load the capacitor at the VSTORE output that it exits cold_start mode, even if I don't need VSTORE else? How could i do that more elegant?
Thank you for your response.
Best regards,
Simon