Datasheet > ETA4049

ETA4049

更新时间： 2024-09-18 17:01:47

品牌	Logo	应用领域
钰泰 - ETA		/
页数	文件大小	规格书
8页	486K
描述
1A Linear 4.2V Charger

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ETA4049 数据手册

ETA4049

30V Input Standoff, 1A Fully Integrated Linear Charger for

1 Cell Li-ion Battery

DESCRIPTION

FEATURES

ETA4049 is a single cell, fully integrated constant current

(CC)/constant voltage (CV) Li-ion battery charger. Its

compact package with minimum external components

requirement makes the ETA4049 ideal for portable

applications. No external sense resistor or blocking diode is

necessary for the ETA4049. Build-in thermal feedback

mechanism regulates the charge current to control the die

temperature during high power operation or at elevated

ambient temperature. The ETA4049 has the function of pre-

charge, which can charge the deeply discharged batteries

by trickle. The fast charge current can be programmed by

an external resistor. CV regulation mode is automatically

enabled once the battery’s charging curve reaches the

constant voltage portion. The output current then decays

and is finally terminated once the charge current drops to

the current threshold set by RIBF. The ETA4049 keeps

monitoring the battery voltage and enables a new charge

cycle once the voltage drops by 200mV below the CV value.

ETA4049 is in a DFN3x3-10 package.



30V Input Standoff Voltage

4.2V Charge Termination Voltage

2.6V Trickle Charge Threshold

Input Over Voltage Protection

Charge Current Programmable, up to 1A

400nA BAT Current when No Charging

Soft-start Limits in-rush Current

DFN3x3-10 Package

RoHS Compliant

APPLICATIONS



E-cigarette

Toys

Bluetooth Applications

Li-ion Battery Powered Devices

TYPICAL APPLICATION

VIN

BAT

NTC

VBAT/VSYS

1.5K

Li+

Battery

STAT

2.2uF

RNTC

RISET

4.7uF

1.5K

ETA4049

STDBY

ISET

IBF

nEN

TMR

RIBF

GND

CTMR

PART No.

PACKAGE

TOP MARK

ETA4049

YWW2L

Pcs/Reel

ORDERING INFORMATION

ETA4049D3K

DFN3x3-10

5000

www.etasolution.com

Empower, Transcend, Achieve!

12 3 4 5 6 7 8

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