微源半导体

概述

The LP4121 is a standalone Boost switching battery charger to charge 2-cellbatteries at up to 2A charge current. The 2-cell switching battery charger operates at 1.3MHz switching frequency to allow a small size of 1µH inductor with low DCR loss.
The LP4121 is available in DFN3x3-10L package and ESOP-8L package.

应用

◆ 2-cell battery charger
◆ BT speaker
◆ Portable printers
◆ Toys

数据参数

最大充电电流(mA)

2000

工作电压(V)

4.5-20

过压保护(V)

7.5

电池电压(V)

8.2/8.3/8.4/8.6/8.7

温度检测

Y

使能控制

-

充电状态指示

Y

充满状态指示

-

PG

-

充电类型

Boost Charger

电池节数

2

产品特征/功能

High charge efficiency, 1.3MHz SW freqeucny and small 1uH inductor, NTC, VBAT/ICHG programmable

封装

DFN-10/ESOP8

特征

◆ Easy-to-use standalone 2-cell synchronous Boost switching charger
◆ Proprietary charge current control
◆ 4.5V to 6.2V input voltage operation
◆ 20V absolute maximum input voltage rating
◆ Charge voltages:8.2V/8.3V18.4V/8.6V/8.7V
◆ 0.35A-2.0A maximum fast charge current
◆ 1.3MHz switching frequency
◆ 1uH inductor for low DCR loss and small footprint
◆ 93% charge efficiency at 1A charge
◆ Support Precharge, Constant Current (CC) charge,Constant Voltage(CV)charge, charge termination and recharge
◆ Battery short circuit protection
◆ Resistor programmable charge voltage
◆ Resistor programmable charge current
◆ High charge accuracy
◆ +/-0.75% charge voltage regulation
◆ -+/-7.5% switching charge current regulation
◆ Protections
◆ Cycle-by-cycle current limit protection
◆ Input voltage requlation (VINDPM)
◆ Battery short protection
◆ Cold/hot battery temperature monitoring(For LP4121QVF only)
◆ Junction temperature thermal regulation(TREG)
◆ Packaging
◆ DFN3x3-10Lor ESOP-8L
◆ RoHS compliant and halogen free
◆ 100% lead (Pb) free

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