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ISL6257 - Highly Integrated Narrow VDC Battery Charger

Key Features

  • ±0.5% Charge Voltage Accuracy (-10°C to +100°C) ±3% Accurate Input Current Limit ±3% Accurate Battery Charge Current Limit ±25% Accurate Battery Trickle Charge Current Limit Programmable Charge Current Limit, Adapter Current Limit and Charge Voltage Fixed 300kHz PWM Synchronous Buck Controller with.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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® ISL6257 Data Sheet January 17, 2007 FN9288.2 Highly Integrated Narrow VDC Battery Charger for Notebook Computers The ISL6257 is a highly integrated battery charger controller for Li-Ion/Li-Ion polymer batteries. ISL6257 is designed for Narrow VDC applications where the system power source is either the battery pack or the regulated output of the charger. This makes the max voltage to the system equal to the max battery voltage instead of the max adapter voltage. Operating at lower system voltage can improve overall efficiency. High efficiency is achieved in the charger with a synchronous buck topology. The low-side MOSFET emulates a diode at light loads to improve the light load efficiency and prevent system bus boosting.