Overview: ISL9212B
Charging System Safety Circuit The ISL9212B 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 +140°C. Together with the battery charger IC and the protection module in a battery pack, the charging system using the ISL9212B 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 ISL9212B has a logic warning output to indicate the fault and an enable input to allow the system to remove the input power. Ordering Information PART NUMBER TEMP. PART RANGE MARKING (°C) PACKAGE PKG. DWG. # ISL9212BIRZ* 2BZ (Note) -40 to +85 12 Ld 4x3 TDFN L12.4x3A (Pb-free) ISL9212EVAL1 ISL9212B Evaluation Board *Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are 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. Typical Application Circuit INPUT VIN C1 OUT ISL6292 BATTERY
CHARGER RILIM ISL9212B ILIM VB EN GND WRN RVB + BATTERY PACK DATASHEET FN6399 Rev 0.
