SLUAAT5 December 2023 BQ25756
Most super capacitors can be discharged down to 0 V and recharged to the maximum voltage with the manufacturer recommended charge current. For a super capacitor, trickle charge and pre-charge phase is not required. As a result, the supercapacitor can charge in two phases.
Phase 1 – Constant current:
Charging starts with the full fast charge current and the capacitor voltage increases to the regulation voltage setting.
Phase 2 – Constant voltage:
Once the capacitor voltage reaches the regulation voltage, the charge current is tapered down to zero and the capacitor voltage is held at the regulation voltage.