Datasheet > ETA4256

ETA4256

更新时间： 2024-11-08 17:01:03

品牌	Logo	应用领域
钰泰 - ETA		/
页数	文件大小	规格书
7页	390K
描述
1.2A Linear 4.2V Charger

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ETA4256 数据手册

ETA4256

1.2A/40V Fully Integrated Linear Charger for 1 Cell Li-ion Battery

DESCRIPTION

FEATURES

ETA4256 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 ETA4256 ideal for portable applications. No external sense

resistor or blocking diode is necessary for the ETA4256. Build-in

thermal feedback mechanism regulates the charge current to

control the die temperature during high power operation or at

elevated ambient temperature. The ETA4256 has a pre-charge

function for trickle charging deeply discharged batteries. 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 1/5 of the programmed value. The ETA4256

keeps monitoring the battery voltage and enables a new charge

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



40V input standoff voltage

Input over voltage protection

4.2V charge termination voltage

2.6V trickle charge threshold

Charge current programmable, up to 1.2A

400nA BAT current when no charging

Soft-start limits in-rush current

DFN3x3-10

APPLICATIONS



E-cigarette

Toys

Bluetooth applications

Li-ion battery powered devices

ETA4256 is in an DFN3x3-10 package.

TYPICAL APPLICATION

BAT

ISET

BAT

CBAT

STAT

CIN

RNTC1

RNTC2

STDBY

NTC

RISET

CSS

nEN

IBF

GND

RIBF

PART No.

PACKAGE

TOP MARK

ETA4256

YWW2L

Pcs/Reel

ORDERING INFORMATION

ETA4256D3K

DFN3x3-10

5000

www.etasolution.com

Powering Minds of the Smart

12 3 4 5 6 7

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