ISL9200

Features:

•Fully Integrated Protection Circuit for Three Protection Variables
-User Programmable Overcurrent Protection Threshold
-Input Overvoltage Protection in Less Than 1µs
-Battery Overvoltage Protection
•High Immunity of False Triggering Under Transients
•High Accuracy Protection Thresholds
•Warning Output to Indicate the Occurrence of Faults
•Enable Input
•Thermal Enhanced DFN Package
•Pb-Free Plus Anneal Available (RoHS Compliant)




Application

•Cell Phones
•Digital Still Cameras
•PDAs and Smart Phones
•Portable Instruments
•Desktop Chargers




Pinout






Specifications

Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 to 30V
Output and VB Pin (OUT, VB) (Note 1) . . . . . . . . . . . . ... . .-0.3 to 7V
Other Pins (ILIM, WRN, EN) . . . . . . . . . . . . . . . . . . ... . . -0.3 to 5.5V
ESD Rating
Human Body Model (Per JESD22-A114-B) . . . . . . . ....... . . . . .3000V
Machine Model (Per EIA/JESD22 A115-A) . . . . . . . ........ . . . . . .200V

Description

The ISL9200 is an integrated circuit (IC) optimized to provide a Li-ion battery redundant safety protection from failures of a charging system. The IC monitors the input voltage, the battery voltage, and the charge current. When any of the three parameters exceeds its limit, the IC turns off an internal P-channel MOSFET to remove the power from the charging system. In addition to the above protected parameters, the IC also monitors its own internal temperature and turns off the P-channel MOSFET when the die temperature exceeds 140C. Together with the battery charger IC and the protection module in a battery pack, the charging system using the ISL9200 has triple-level protection and is two-fault tolerant. The IC is designed to turn on the internal PFET slowly to avoid inrush current at power-up but will turn off the PFET quickly when input overvoltage is detected, in order to remove the power before any damage occurs. The ISL9200 has a logic warning output to indicate the fault and an enable input to allow the system to remove the input power.