The LT3650 is a single-cell Li-Ion battery charger that can be powered directly from high voltage automotive and industrial supplies. The device features a 1MHz switching frequency that allows the use of small inductors, and is housed in a tiny 3mm × 3mm DFN12-pin package. The IC has built-in reverse current protection, which blocks current flow from the battery back to the input supply if that supply is disabled or discharged to ground, so a single-cell LT3650 charger does not require an external blocking diode on the input supply.
The Linear Technology LT3650 is a standalone monolithic switching battery charger designed to charge single-cell or two-cell Lithium-Ion batteries directly from high voltage automotive and industrial supplies up to 40V. It eliminates the need for an external DC/DC step-down converter by accepting input voltages as high as 40V while providing charge currents of up to 2A.
The IC can withstand input voltages as high as 40V without damage.
The charger provides charge currents as high as 2A.
Most Li-Ion batteries charge fully in three hours.