ETA9742

www.etasolution.com

1

Powering Minds of the Smart

3A Switching Charger, 2.4A Boost and 3 LED-indicators for battery level,

charge/discharge status in One ESOP8 with Single Inductor

DESCRIPTION

FEATURES

ETA9742 is a switching Li-Ion battery charger capable of

delivering up to 3A of charging current to the battery and also

capable of delivering up to 5V/2.4A in boost operation, with high

efficiency in both charging mode and boost mode. It also includes

a fuel gauge system for power indication. For charging, it uses a

proprietary control scheme that eliminates the current sense

resistor for conventional constant current control, maximizing

efficiency, reducing charging time and reducing costs. It can also

output a 5V voltage in the reversed direction by boosting from

the battery. It only needs a single inductor to provide power bi-

directionally with a proprietary automatic mode detect and

switch scheme. ETA9742 is an ideal all-in-one solution for battery

charging and discharge applications, such as power banks, smart

phones, and tablets with only one USB port that can be used for

charging battery function.

ETA9742 is suitable for charging a 4.2V Li-ion battery. And

ETA9742 is in ESOP8 package.

 Bi-Directional Power conversion with Single

Inductor

 Automatic Mode Switching

 Switching Charger

 5V Synchronous Boost

 Up to 96% Efficiency

 Up to 3A Max charging current and 2.4A

discharging

 No-Battery detection

 No External Sense resistor

 LEDs for battery level indication and

charge/discharge status indication

APPLICATIONS

 Tablet, MID

 Smart Phone

 Power Bank

TYPICAL APPLICATION

ORDERING INFORMATION

PART No.

PACKAGE

TOP MARK

Pcs/Reel

ETA9742E8A

ESOP8

ETA9742

2500

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