NW73401

The NW73401 is a new generation of highly integrated synchronous switch-mode charger, featuring integrated synchronous FETs, high switching frequency and high charging efficiency. With ETA’s proprietary current sense technology, by eliminating external sense resistor, it is capable of delivering charge current up to 4A. Furthermore, it has a very small footprint of 1.7mmx2mm and only requires small external components; therefore, it is ideal for extremely space-limited portable applications powered by 1-cell Li-ion or Li-polymer batteries.

NW73401 also has a feature that in high impedance mode, the IC stops charging and consumes very low current from VBUS, thereby effectively reducing the standby power consumption of upstream power source.

The NW73401’s charge current and termination current can also be programmed by two separated external resistors. A NTC function is also provided to allow flexible thermal charging profiles. A STAT pin provides charging status indications.

NW73401 is available in a small QFNFC1.7x2-20 and QFN4x4-24 package.