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ISL6258A Datasheet Narrow Vdc Regulator/charger

Manufacturer: Intersil (now Renesas)

Overview: ISL6258, ISL6258A To request the full datasheet, please visit www.intersil.com/products/ISL6258 or ISL6258A Data Sheet December 11, 2007 FN6571.1 Narrow VDC Regulator/Charger with SMBus Interface The ISL6258, ISL6258A are a highly integrated Narrow VDC system voltage regulator and battery charger controller. Operating parameters are programmable over the System Management Bus (SMBus). The ISL6258, ISL6258A 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 ISL6258, ISL6258A 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 ISL6258, ISL6258A can charge two to four series connected Lithium-ion cells, at up to 8A charge current. The ISL6258 has default settings for 2-cell systems and ISL6258A 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 ISL6258, ISL6258A 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 available via SMBus. The ISL6258, ISL6258A also provide two analog outputs that indicate the adapter current and battery discharge current with 4% accuracy.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Key Features

  • ±0.5% System Voltage Accuracy (-10°C to +100°C).
  • ±3% Accurate Input Current Limit.
  • ±3% Accurate Battery Charge Current Limit.
  • Switching frequency can be reduced via SMBus for higher efficiency at light load conditions.
  • Trickle Charge System for Deeply Discharged Batteries - Automatic Trickle Charge Current (256mA) - Holds Minimum Voltage to System.
  • SMBus 2 Wire Serial Interface.
  • Battery Short Circuit Protection.
  • Fast System.

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