It uses an I²C interface for programmable charge current control, with a maximum charge current of 1.55A and a maximum battery pack voltage of 4.44V. This is the part to reach for when you need a compact, host-controlled charger for a single-cell Li-Ion pack in a space-constrained design.
1.55A charge current — sizing the charge path
The 1.55A maximum charge current sets the charge time for a typical 1000 mAh to 2000 mAh single-cell pack at roughly one hour to two hours, depending on termination. The I²C interface lets the host adjust the current on the fly for thermal management or USB input current limiting. Keep the PCB trace from the charger output to the battery connector wide enough for 1.55A continuous — 20 mils minimum on 1 oz copper, or use a short, direct route with a via stitch to an inner plane.