isl9519r

DATASHEET
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Narrow VDC Regulator/Charger with SMBus Interface
ISL9519R
Features
The ISL9519R is a highly integrated Narrow VDC system voltage
regulator and battery charger controller. Operating parameters
are programmable over the System Management Bus (SMBus).
The ISL9519R 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 ISL9519R 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 ISL9519R 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 MOSFET
drivers and bootstrap diode result in fewer components and
smaller implementation area. Low offset current-sense
amplifiers provide high accuracy.
• ±0.5% System Voltage Accuracy (-10°C to +100°C)
The ISL9519R provides an open drain digital output that
indicates the presence of the AC-adapter. The ISL9519R also
provides an analog output that indicates the adapter current.
• Fast System-Load Transient Response
Related Literature
• ±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 an External Pin
• Adapter In-rush FET Control
• Adapter Isolation FET Control
• Battery Short Circuit Protection
• Monitor Outputs
- Adapter Current (2.5% Accuracy)
- AC-adapter Present Indicator
• See AN1562, “ISL9519EVAL1Z Evaluation Board Setup
Procedure” for applications with adapter voltage > 7V
• 11-Bit Max System Voltage Setting
• See AN1570, “ISL9519TQFNEVAL2Z Evaluation Board Setup
Procedure” for applications with adapter voltage > 5V
• 6-Bit Charge Current Setting
- Over 8A Battery Charger Current
Applications
• 7-Bit Min System Voltage Setting
• Notebook Computers
• 6-Bit Adapter Current Setting
- Over 8A Adapter Current
• Tablet PCs
• +4.5V to +22V Adapter Voltage Range
• Portable Equipment with Rechargeable Batteries
• Pb-Free (RoHS Compliant)
May 27, 2011
FN7836.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL9519R
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FN7836.0
May 27, 2011