USB-C battery charger supports two-way power delivery

The single-chip ISL9237 is a buck-boost battery charger that supports two-way power delivery in ultrabooks, tablets and power banks using the reversible USB Type-C connector. The narrow Vdc battery charger replaces competitive buck and boost two-chip charger solutions, eliminating a charger IC and inductor to reduce customer BoM costs by up to 40%. In charging mode, the ISL9237 takes input power from a wide range of dc power sources including ac/dc charger adapters, USB power delivery ports and any travel adapter. It allows trickle charging of depleted batteries.

The USB 3.1-compliant ISL9237 is the first battery charger capable of providing buck-mode, buck-boost-mode, and boost-mode for 1-to-3 cell Li-ion batteries. It also supports USB On-The-Go with a 5 Vout reverse buck-mode, and reduces traditional two-stage charging to a single-stage buck-boost for improved efficiency. The USB Type-C interface connection enables delivery of data, video and power up to 100 W over a single cable. Watch a video on the ISL9237 solution.