Fast-charge wireless power receivers cut power loss

The bq51020 and bq51021 5-W wireless power receivers allow consumers to charge their Qi-compliant mobile phones, tablets, power banks and other electronics faster, cooler and more efficiently compared to other available wireless power solutions. The single-chip receivers feature a programmable output voltage up to 8 V and adjustable output voltage that help reduce power loss by as much as 50%, compared to existing solutions. The bq51021 features an I² C interface that allows system designers to implement foreign object detection and has a pad-detect feature that makes aligning the receiver with the charger easier.

The wireless power receivers achieve up to 96% power efficiency, and reduces temperature rise by 35% compared to other solutions. The devices provide rectification, regulation, and digital control and communications to support the Qi 1.1 specification. The chip measures 3.6- x 2.9- x 0.5-mm with a solution size of 75 mm² and does not need an inductor.