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ISL9519C

Intersil
Part Number ISL9519C
Manufacturer Intersil
Description Narrow VDC Regulator/Charger
Published Oct 12, 2014
Detailed Description Narrow VDC Regulator/Charger with SMBus Interface and Internal Switching FETs ISL9519C The ISL9519C is a highly integrat...
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ISL9519C
ISL9519C


Overview
Narrow VDC Regulator/Charger with SMBus Interface and Internal Switching FETs ISL9519C The ISL9519C is a highly integrated Narrow VDC system voltage regulator and battery charger controller.
Operating parameters are programmable over the System Management Bus (SMBus).
The ISL9519C is 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 ISL9519C also includes a patented 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 and variable switching frequency for enhanced light load efficiency and AC-adapter boosting prevention.
The ISL9519C can charge one, two or three series connected Lithium-ion cells, at up to 8A charge current.
Default settings for 1-, 2- or 3-cell operation at power-up are selected by an external pin.
Integrated MOSFETs, drivers and bootstrap diode result in fewer components and smaller implementation area.
Low offset current-sense amplifiers provide high accuracy.
The ISL9519C provides an open drain digital output that indicates the presence of the AC-adapter.
The ISL9519C also provides an analog output that indicates the adapter current.
Features • ±0.
5% System Voltage Accuracy (-10°C to +100°C) • ±3% Accurate Input Current Limit • ±3% Accurate Battery Charge Current Limit • Variable Switching Frequency at Light Load Conditions for Higher Efficiency • Fixed Frequency Operation at Higher Loads - Fixed Frequency Mode can be Forced by an External Pin • Trickle Charge System for Deeply Discharged Batteries - Automatic Trickle Charge Current (256mA) - Holds Minimum Voltage to System • SMBus 2-Wire Serial Interface • Default System Voltage Values for 1-Cell, 2-Cell or 3-Cell Operation Selected by...


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