Datasheet > ETA4040

ETA4040

更新时间： 2024-09-18 17:01:23

品牌	Logo	应用领域
钰泰 - ETA		/
页数	文件大小	规格书
12页	1023K
描述
1A Linear 4.2V Charger

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ETA4040 数据手册

ETA4040

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

1 Cell Li-ion Battery

DESCRIPTION

FEATURES

ETA4040 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 ETA4040 ideal for portable

applications. No external sense resistor or blocking diode



30V Input Standoff Voltage

4.2V Charge Termination Voltage

Charge Current Programmable, Up to 1A

Pin Selectable USB 100mA or 500mA Maximum

Input Current Limit

is necessary for the ETA4040. Build-in thermal feedback  Programmable Termination Current and Pre-

mechanism regulates the charge current to control the die

temperature during high power operation or at elevated

ambient temperature. The ETA4040 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 pre-charge

current and the termination current threshold are

programmed by an external resistor as well. The ETA4040

keeps monitoring the battery voltage and enables a new

charge cycle once the voltage drops by 100mV below the

CV value.

charge Current Threshold



Operation over JEITA Range via Battery NTC

Fixed 10 hours Safety Timer

Soft-start Limits in-rush Current

DFN2X2-10 Package

APPLICATIONS



E-cigarette

Toys

Wearable Devices

Li-ion Battery Powered Devices

ETA4040 is in a DFN2X2-10 package.

TYPICAL APPLICATION

High: Input current limit =500mA

Float: Input current limit=100mA

Low: Input current limit=ISET

VIN

ISET2

1.5K

^nPGETA4040

1.5K

BAT

System Load

nCHG

4.7uF

ISET

2.2uF

PRETERM

Battery

RISET

GND

RPRETERM

PART No.

PACKAGE TOP MARK Pcs/Reel

BEYW

ORDERING INFORMATION

ETA4040D2K

DFN2X2-10

3000

www.etasolution.com

Empower, Transcend, Achieve!

12 3 4 5 6 7...12

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