ROHM — BD71631QWZ Battery Charger IC

The BD71631QWZ from ROHM is a linear battery charger IC which is compatible with not only single-cell lithium-ion batteries, but also all solid, semi-solid and other new rechargeable battery types that call for low-voltage charging.

This broad compatibility results from the ability to set the BD71631QWZ’s charging voltage between 2.0 V and 4.7 V simply by changing an external resistor. The charge current and termination current can also be set by external resistors. The freedom to configure current and voltage characteristics makes it easy to re-use circuit designs based on the BD71631QWZ across multiple products that use different batteries.

Space saving is another benefit of the BD71631QWZ. The battery charger IC benefits from proprietary package technology to produce a thin, compact 1.8 mm x 2.4 mm x 0.4 mm form factor. This gives a mounting height 60% smaller, and a footprint 50% smaller, than those of standard battery chargers supplied in a 3.0 mm x 3.0 mm x 1.0 mm package. This makes the BD71631QWZ particularly suitable for wearable devices and for IoT devices equipped with ultra-thin sheet-like rechargeable batteries.