LTC4002EDD-8.4#PBF

LTC4002 is a complete battery charger controller. With a 500KHz switching frequency, It provides a small, simple and efficient solution to fast charge Li-Ion batteries from a wide range of supply voltages. An external sense resistor sets the charge current with ±5% accuracy. An internal resistor divider and precision reference set the final float voltage to 4.2V per cell with ±1% accuracy. When the input supply is removed, this device automatically enters a low current sleep mode, dropping the battery drain current to 10µA. An internal comparator detects the near end-of-charge condition while an internal timer sets the total charge time and terminates the charge cycle. After the charge cycle ends, if the battery voltage drops below 4.05V per cell, a new charge cycle will automatically begin. It is used in application such as portable computers, charging docks, handheld instruments etc.

• Wide input supply range is 8.9V to 22V
• End-of-charge current detection output
• 3hour charge termination timer, automatic battery recharge
• Constant switching frequency for minimum noise
• Automatic shutdown when input supply is removed
• Automatic trickle charging of low voltage batteries
• Battery temperature sensing and charge qualification
• Stable with ceramic output capacitor
• Operating temperature is -40°C to 85°C
• Package style is 10-lead plastic DFN

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