Datasheet4U Logo Datasheet4U.com

ISL6257 Datasheet Highly Integrated Narrow Vdc Battery Charger

Manufacturer: Intersil (now Renesas)

Overview: ® ISL6257 Data Sheet January 17, 2007 FN9288.2 Highly Integrated Narrow VDC Battery Charger for Notebook puters 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. The constant output voltage can be selected for 2, 3 and 4 series Li-Ion cells with ±0.5% accuracy over temperature. It can also be programmed between 4.2V + 5% per cell and 4.2V - 5% per cell to optimize battery capacity. When supplying the load and battery charger simultaneously, the input current limit for the AC adapter is programmable to within ±3% accuracy to avoid overloading the AC adapter and to allow the system to make efficient use of available adapter power for charging. It also has a wide range of programmable charging current. The ISL6257 automatically transitions from regulating current mode to regulating voltage mode.

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.

More Datasheets from Intersil (now Renesas)

Part Number Description
ISL6217 Precision Multi-Phase Buck PWM Controller
ISL6219 Microprocessor CORE Voltage Regulator
ISL6226 Advanced PWM and Linear Power Controller for Portable Applications
ISL6232 High Efficiency System Power Supply Controller
ISL6235 Advanced Triple PWM Only Mode and Dual Linear Power Controller
ISL6244 Multi-Phase PWM Controller
ISL6247 A Mobile Multi-Phase PWM Controller
ISL6263 5-Bit VID Single-Phase Voltage Regulator
ISL6263B 5-Bit VID Single-Phase Voltage Regulator
ISL6265 Multi-Output Controller

ISL6257 Distributor