BQ25070DQCT

1A ，单输入，单节磷酸铁锂电池线性充电器， 50毫安LDO 1A, Single-Input, Single-Cell LiFePO4 Linear Battery Charger with 50mA LDO

The is a highly integrated LiFePO4 linear Battery Charger targeted at space-limited portable applications. It operates from either an USB port or AC Adapter and charges a single-cell LiFePO4 battery with up to 1A of charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated adapters. It has a single power output that charges the battery and powers the system. The charge current is programmable up to 1A using the CTRL input. Additionally, a 4.9V ±10% 50mA LDO is integrated into the IC for supplying low power external circuitry. The LiFePO4 charging algorithm removes the constant voltage mode control usually present in Li-ion battery charge cycles. Instead, the battery is fast charged to the overcharge voltage and then allowed to relax to a lower float charge voltage threshold. The removal of the constant voltage control reduces charge time significantly.

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Single cell LiFePO4 charging algorithm

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Programmable charge current through single input interface

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7% Charge current regulation accuracy

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Thermal regulation and protection

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Soft-start feature to reduce inrush current

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Battery NTC monitoring

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Charging status indication

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Green product and no Sb/Br

Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.