DATASHEET
ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D
Li-ion Battery Charger
FN9252 Rev 4.00 Dec 20, 2018
The ISL...
DATASHEET
ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D
Li-ion Battery Charger
FN9252 Rev 4.00 Dec 20, 2018
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.
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, that is, 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.
The ISL9205 family incorporates Thermaguard, which protects the IC against over-temperature. If the die temperature rises above a typical value of +100°C, the thermal foldback function reduces the charge current to prevent further temperature rise. The ISL9205 includes an external temperature monitoring function (not available in some package options). A Negative Temperature Coefficient (NTC) ...