Industry’s First USB-C Buck-Boost Battery Charger Now Shipping

Industry’s First USB-C Buck-Boost Battery Charger Now Shipping

Intersil Corporation introduced the industry’s first buck-boost battery charger that supports two-way power delivery in ultrabooks, tablets and power banks using the reversible USB Type-C™ connector. The single-chip ISL9237 Narrow VDC (NVDC) battery charger replaces competitive buck and boost two-chip charger solutions, eliminating a charger IC and inductor to reduce customer bill of materials (BOM) costs by up to 40%. The ISL9237 leverages Intersil’s patented R3™ modulation technology for acoustic noise-free operation, excellent light load efficiency and ultra-fast transient response to extend battery run-time.

The USB 3.1-compliant ISL9237 joins the emerging USB-C™ ecosystem as 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 (OTG) with a 5Vout 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 100W over a single cable. 

In charging mode, the ISL9237 takes input power from a wide range of DC power sources -- AC/DC charger adapters, USB power delivery (PD) ports and any travel adapter -- to charge battery packs with up to 3-series cell Li-ion batteries. The ISL9237 can also operate connected to only a battery, an adapter, or both. The ISL9237’s system turbo-mode helps the battery and charger adapter work together to supply the system load when it exceeds the adapter’s capability. In turbo-mode, the ISL9237 quickly turns on the battery BGATE FET to deliver system power. In addition, the ISL9237’s wide 5V to 20V input voltage capability helps boost the USB-C ecosystem to support new power bank products.

More information: Intersil