Description

The FSA831A is a charger-detection IC w ith an integrated

isolation sw itch for use w ith a micro/mini USB port. The

FSA831A detects battery chargers and is compliant w ith

USB Battery Charging Specification, Rev 1.2 (BC1.2). The

algorithm incorporates Data Contact Detection (DCD), w hich

ensures that the shorter, inner pins of the USB connector are

making contact prior to continuing w ith battery charger

detection. The device determines if a Dedicated Charging

Port (DCP), Charging Dow nstream Port (CDP), or a typical

PC host, called a Standard Dow nstream Port (SDP), is

connected. If a charger is detected, the FSA831A

determines w hether the charger is a DCP or CDP. For SDP

and CDP detection, an internal isolation sw itch is closed to

connect the D+/D- lines of the USB cable to the resident

USB transceiver w ithin the portable device. The FSA831A

conforms to all the constraints for the Dead Battery Provision

(DBP) w ithin the BC1.2 specification, including a 30-minute

timer that cannot exceed 45 minutes, per BC1.2.

Applications

 MP3, Mobile Internet Device (MID), Cell Phone, PDA,

Digital Camera, Notebook and Netbook