®
ISL9518, ISL9518A
Data Sheet December 8, 2008 FN6775.0
www.DataSheet4U.com
Narrow VDC Regulator/Charger with SMBus ...
®
ISL9518, ISL9518A
Data Sheet December 8, 2008 FN6775.0
www.DataSheet4U.com
Narrow VDC Regulator/Charger with SMBus Interface
The ISL9518, ISL9518A are highly integrated Narrow VDC system
voltage regulators and battery charger controllers. Operating parameters are programmable over the System Management Bus (SMBus). The ISL9518, ISL9518A are designed for applications where the system power source is either the battery pack or the output of the regulator/charger. This makes the max
voltage to the system equal to the max battery
voltage instead of the max adapter
voltage. The ISL9518, ISL9518A also include a system to control trickle charging deeply discharged batteries while maintaining system
voltage at a user defined minimum. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation for enhanced light load efficiency and AC-adapter boosting prevention. The ISL9518, ISL9518A can charge two to four series connected Lithium-ion cells, at up to 8A charge current. The ISL9518 has default settings for 2-cell systems and the ISL9518A has default settings for 3-cell systems. Integrated
MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense
amplifiers provide high accuracy. The ISL9518, ISL9518A provide two open drain digital outputs that indicate the presence of the AC adapter and trickle charge state. Trickle charge state and AC adapter present indicators are also...