Overview: ISL9222
High Input Voltage Charger The ISL9222 is a cost-effective, fully integrated high input voltage single-cell Li-ion battery charger. The charger uses a CC/CV charge profile required by Li-ion batteries. The charger accepts an input voltage up to 28V but is disabled when the input voltage exceeds the OVP threshold, typically 6.8V, to prevent excessive power dissipation. The 28V rating eliminates the overvoltage protection circuit required in a low input voltage charger.
The charge current is user programmable with an external resistor. When the battery voltage is lower than typically 2.55V, the charger preconditions the battery with typically 20% of the programmed charge current. An internal thermal foldback function protects the charger from any thermal failure.
AN indication pin PPR allows simple interface to a microprocessor or LED. When no adapter is attached or when disabled, the charger draws less than 1µA leakage current from the battery. Ordering Information PART NUMBER
(Note) PART TEMP. PACKAGE MARKING RANGE (°C) (Pb-Free) PKG. DWG. # ISL9222IRTZ-T 22Z -40 to +85 8 Ld 2x3 TDFN L8.2x3A 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 pounds/die attach materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS pliant and patible 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 FN6643 Rev 1.
