Datasheet > ETA4054

ETA4054

更新时间： 2024-11-08 17:01:59

品牌	Logo	应用领域
钰泰 - ETA		/
页数	文件大小	规格书
6页	235K
描述
1A Linear 4.2V Charger

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ETA4054 数据手册

ETA4054

16V/1A Fully Integrated Linear Charger for 1 Cell Li-ion Battery

DESCRIPTION

FEATURES

ETA4054 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 ETA4054 ideal for

portable applications. No external sense resistor or

blocking diode is necessary for the ETA4054. Build-in

thermal feedback mechanism regulates the charge

current to control the die temperature during high power

operation or at elevated ambient temperature. The

ETA4054 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 1/10th of

the programmed value. The ETA4054 keeps monitoring

the battery voltage and enables a new charge cycle

once the voltage drops by 150mV below the CV value.



16V standoff input voltage at VIN and BAT pins

4.2V charge termination voltage

Charge current programmable, up to 1A

No damage when battery reversely connected

25uA supply current when standby

Soft-start limits in-rush current

SOT23-5 Package

APPLICATIONS



Toys

Bluetooth applications

Li-ion battery powered devices

ORDERING INFORMATION

PART

ETA4054S2F SOT23-5

PACKAGE PIN

TOP MARK

B1YW

ETA4054 is in a tiny SOT23-5 package.

TYPICAL APPLICATION

VIN

BAT

ETA4054

STAT

1uF

Li+

Battery

4.7uF

ISET

RISET

GND

www.etasolution.com

Powering Minds of the Smart

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