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