The MEZS7-2SBoostCharger is a complete solution module for charging and balancing two Li-ion or Li-polymer series cells. The solution includes the MP2639C battery charger with integrated FETs, protection features, cell balancing, and LED indicators for battery state of charge.
When input power is present, the MEZS7-2SBoostCharger charges a 2-cell series battery with a 2.5A charge current and ensures the two cells stay balanced.
The MEZS7-2SBoostCharger provides 4 LED drivers to achieve the voltage-based fuel gauge indication.
To guarantee safe operation, the MEZS7-2SBoostCharger has input over-voltage protection, battery over-voltage protection, thermal shutdown, JEITA battery temperature monitoring, and a charge timer to prevent prolonged charging of a dead battery. The solution can also be configured to provide a regulated 5V output back to the USB port in discharge mode, in accordance with USB on the-Go and USB Type-C specifications.