Intersil ISL9209IRZ

Description
The ISL9209 is an integrated circuit (IC) designed to provide redundant safety protection for Li-ion batteries from charging system failures. It monitors input voltage, battery voltage, and charge current. When any of these parameters exceed their limits, the IC deactivates an internal P-channel MOSFET to disconnect power from the charging system. Additionally, the IC monitors its internal temperature and turns off the P-channel MOSFET if the temperature exceeds 140°C.

Features
Integrated protection circuit for three protected variables
High accuracy protection thresholds
User-programmable over-current protection threshold
Input over-voltage protection in less than 1μs
High immunity to false triggering under transients
Warning output to indicate fault occurrence
Enable input to allow system to remove input power
Easy to use
Thermal enhanced TDFN package
Pb-Free Plus Anneal available (RoHS compliant)

Applications
Cell phones
Digital still cameras
PDAs and smart phones
Portable instruments
Desktop chargers