800mA Single Chip Li-Ion and Li-Polymer Charger with NTC and High input withstand voltage
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LP4040
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概述
LP4040 is a complete constant-current/ constant voltage linear charger for single cell lithium-ion battery. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor.The LP4040 automatically terminates the charge cycle when the charge current drops below the programmed termination threshold after the final float voltage is reached. When the input supply is removed, the device automatically enters a low current state, dropping the battery drain current to less than 1μA. Other features include charge current monitor, under voltage lockout, automatic recharge, status pins to indicate charging state and the presence of an input voltage and an NTC thermistor input used to monitor battery temperature.
应用
◆ Portable Media Players/Game ◆ Power Bank ◆ Bluetooth Applications ◆ PDA/MID
数据参数
数据参数
最大充电电流(mA)
800
工作电压(V)
4.5~30
过压保护
6
电池电压(V)
4.2/4.35
温度检测
Y
使能控制
-
充满指示
-
充电状态指示
Y
电源状态指示
Y
电池节数
1
产品特征/功能
CTC,High Vin voltage,Low size,OTP
封装
DFN-10（2*2)
特征
特征
◆ Input Voltage up to 30V ◆ Battery Maximum Voltage up to 17V ◆ Input Over Voltage Protection：6V ◆ NTC Thermistor Input for Temperature QualifiedCharging ◆ Short-circuit Protection ◆ Programmable Charge Current up to 800mA ◆ Less Than 1μA Battery Reverse Current ◆ Protection of Reverse Connection of Battery ◆ No MOSFET, Sense Resistor or Blocking DiodeRequired ◆ Constant-Current / Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating ◆ TDFN-10L Package ◆ RoHS Compliant and 100% Lead (Pb)-Free
