微源半导体

概述

The LP4125 is a standalone Boost switching battery charger to charge 2-cell batteries at a fixed 1.2A charge current. The charge voltage is programmable with a resistor connected to VSET pin and GND. The 2-cell switching battery charger operates at 750kHz switching frequency to allow a small size of 2.2µH inductor with low DCR loss.
The LP4125 is available in 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)

1200

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, NTC, VBAT programmable

封装

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
◆ 1.2A fast charge current
◆ 750kHz switching frequency
◆ 2.2uH inductor with low DCR loss
◆ Peak 95% charge efficiency
◆ 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 regulation (VINDPM)
◆ Battery short protection
◆ Cold/hot battery temperature monitoring
◆ Junction temperature thermal regulation(TREG)
◆ Packaging
◆ ESOP-8L
◆ RoHS compliant and halogen free
◆ 100% lead (Pb) free

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