LTC4002EDD-8.4#PBF

LINEAR TECHNOLOGY  LTC4002EDD-8.4#PBF  芯片, 电池充电控制器, 开关模式, 10DFN

The is a complete Battery Charger Controller for two 8.4V cell Li-ion batteries. With a 500kHz switching frequency, the LTC4002 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, the LTC4002 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.

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High efficiency current mode PWM controller with 500kHz switching frequency

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±1% Charge voltage accuracy

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End-of-charge current detection output

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3 hour charge termination timer

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Constant switching frequency for minimum noise

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±5% Charge current accuracy

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Low 10µA Reverse battery drain current

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Automatic battery recharge

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Automatic shutdown when input supply is removed

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Automatic trickle charging of low voltage batteries

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Battery temperature sensing and charge qualification

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Stable with ceramic output capacitor