Overview: DATASHEET ISL9209C
Charging System Safety Circuit The ISL9209C is an integrated circuit (IC) optimized to provide a redundant safety protection to a Li-ion battery 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 temperature exceeds +140°C. Together with the battery charger IC and the protection module in a battery pack, the charging system using the ISL9209C has triple-level protection and is two-fault tolerant.
The IC is designed to turn on the internal PFET slowly to avoid in-rush current at power-up but will turn off the PFET quickly when the input is overvoltage in order to remove the power before any damage occurs. The ISL9209C 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 PART (Note) MARKING TEMP. RANGE
(°C) PACKAGE (Pb-free) PKG. DWG. # ISL9209CIRZ* 09CZ -40 to +85 12 Ld 4x3 TDFN L12.4x3A *Add “-T” suffix for tape and reel. 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 100% matte tin plate plus anneal (e3 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. Typical Application Circuit INPUT VIN OUT C1 ISL6292 BATTERY
CHARGER RILIM ISL9209C ILIM VB EN GND WRN RVB
BATTERY PACK FN6489 Rev 1.
