Overview: ISL9211
Charging System Safety Circuit The ISL9211 is an integrated circuit (IC) optimized to provide a redundant safety protection to a Li-ion battery 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 N-channel MOSFET to remove the power from the charging system to the battery. In addition to the above protected parameters, the IC also monitors its own internal temperature and turns off the N-channel MOSFET when the temperature exceeds +150°C. Together with the battery charger IC and the protection module in a battery pack, the charging system using the ISL9211 has triple-level protection and is two-fault tolerant.
The IC is designed to turn on the internal NFET slowly to avoid inrush current at power up but will turn off the NFET quickly when the input is overvoltage in order to remove the power before any damage occurs. The ISL9211 has a logic flag output to indicate a fault condition.
Typical Application Circuit INPUT VIN C1 OUT C2 ISL6292 BATTERY CHARGER RILIM ISL9211 ILIM VB GND FAULT RVB
BATTERY PACK Ordering Information PART NUMBER TEMP PART RANGE MARKING (°C) PACKAGE PKG. (Pb-Free) DWG. # ISL9211IRU58XZ-T* 15X -40 to +85 8 Ld µTDFN L8.2x2 ISL9211IRU68XZ-T* 16X -40 to +85 8 Ld µTDFN L8.2x2 *Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and NiPdAu plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. DATASHEET FN6658 Rev 4.
