BQ25071DQCR Texas Instruments 电池管理 1A, Sng-input LiFePO4 Lin Bat Char

1 Features 3 Description

1• Single Cell LiFePO The bq25071 is a highly integrated, linear, LiFePO4

4 Charging Algorithm

battery charger targeted at space-limited portable

• 30V Input Rating, With 10.5 V Overvoltage applications. It accepts power from either a USB port

Protection (OVP) or AC adapter and charges a single-cell LiFePO4

• 50mA Integrated Low Dropout Linear Regulator battery with up to 1 A of charge current. The 30 V

(LDO) input rating with 10.5 V input overvoltage protection

supports low-cost unregulated adapters. • Programmable Charge Current Through ISET and

EN Terminals The bq25071 has a single power output that

• 7% Charge Current Regulation Accuracy simultaneously charges the battery and powers the

system. The input current is programmable from 100

• Thermal Regulation and Protection mA up to 1 A using the ISET input or configurable for

• Soft-Start Feature to Reduce Inrush Current USB500. There is also a 4.9 V ±10% 50 mA LDO

• Battery NTC Monitoring integrated into the IC for supplying low power

external circuitry. • Charging Status Indication

The LiFePO4 charging algorithm removes the current

2 Applications taper typically seen as part of the constant voltage

mode control used in Li-Ion battery charge cycles

• Smart Phones which reduces charge time significantly. Instead, the

• Mobile Phones battery is fast charged to the overcharge voltage and

• Portable Media Players then allowed to relax to a lower float charge voltage

threshold. The charger integrates the power stage • Low Power Handheld Devices