DATASHEET
ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D
Li-ion Battery Charger FN9252
Rev 3.00
September 30, 2016 The ISL9205, ISL9205A, ISL9205B, ISL9205C, and ISL9205D
are integrated single-cell Li-ion or Li-polymer chargers capable
of operating at an input voltage as low as 2.5V. The low
operating voltage allows the charger to work with a variety of
AC adapters. Features The ISL9205 family operates as a linear charger when the AC
adapter is a voltage source. The battery is charged in a
standard Li-ion charge profile, i.e., a Constant Current phase
followed by a Constant Voltage phase (CC/CV). The charge
current during the Constant Current phase is determined by
the external resistor connected to the IREF pin. When the
adapter output is a current-limited voltage source and the
current limit is smaller than the programmed constant current
of the IC, the ISL9205 operates as a pulse charger where the
charge current is determined by the current limit of the AC
adapter during the Constant Current phase. The ISL9205
operates in a linear mode during the constant voltage phase in
both adapter cases. Low component count and cost The ISL9205 family incorporates Thermaguard, which protects
the IC against over-temperature. If the die temperature rises
above a typical value of +100В°C, the thermal foldback …