DATASHEET
ISL78692 FN8692
Rev.1.00
Mar 29, 2017 Li-ion/Li-Polymer Battery Charger
The ISL78692 is an integrated single-cell Li-ion or Li-polymer
battery charger capable of operating with an input voltage
as low as 2.65V (cold crank case). This charger is designed to
work with various types of AC adapters or a USB port. Features The ISL78692 operates as a linear charger when the AC
adapter is a voltage source. The battery is charged in a CC/CV
(constant current/constant voltage) profile. The charge current
is programmable with an external resistor up to 1A. The
ISL78692 can also work with a current-limited adapter to
minimize the thermal dissipation. Reverse battery leakage 700nA The ISL78692 features charge current thermal foldback to
guarantee safe operation when the printed circuit board’s
thermal dissipation is limited due to space constraints.
Additional features include preconditioning of an
over-discharged battery, an NTC thermistor interface for
charging the battery in a safe temperature range and
automatic recharge. The device is specified for operation in
ambient temperatures from -40В°C to +85В°C and is offered in
a 3x3mm thermally enhanced DFN package. Accepts CV and CC types of adapters or USB bus power Complete charger for single-cell Lithium chemistry batteries Integrated power transistor and current sensor 1% initial voltage accuracy Programmable CC current up to 1A Charge current thermal foldback NTC thermistor interface for battery temperature alert Preconditioning trickle charge Guaranteed to operate down to 2.65V after start-up Ambient temperature range: -40°C to +85°C AEC-Q100 qualified Applications Automotive systems Related Literature eCall systems Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)” Backup battery systems Technical Brief TB379 “Thermal Characterization of …