Open Source Lipo Battery Charger with USB C Power DeliveryDesigned by ARK Electronics in United States of America
LiPow Features Charges and balances 2s-4s packs (single cell charging possible in future) USB type C input Supports charging up to 60W from USB PD power supplies or any other USB C port with PD so...Read More…
Everything runs automatically and will charge up to the max capability of the connected USB PD power supply if the max current output limit exceeds the input power supply. Lower current limits can be programmed as well.
Charging current is decided by the USB PD Source capability. First, it checks the available voltages from the source, then selects the voltage that will result in the highest efficiency for the regulator based on the number of cells. For instance, using a 30W supply with a 20V 1.5A (30W) capability and a 4s Lipo battery at 15.0V. The charging current will be 30W/15.0V=2A. As the battery voltage increases, the max charging current will decrease. 30W/16.0V=1.875A.
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