DESCRIPTION FEATURES

ETA9741 is a switching Li-Ion battery charger capable of

delivering 2A 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. ETA9741 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.

ETA9741 is suitable for charging a 4.2V Li-ion battery. And ETA9741

is in ESOP8 package.

 Bi-Directional Power conversion with Single

Inductor

 Automatic Mode Switching

 Switching Charger

 5V Synchronous Boost

 Up to 96% Efficiency

 2A charging current and 2.4A discharging

 No-Battery detection

 No External Sense resistor

 4 LEDs Fuel gauge

 Button Controlled

APPLICATIONS

 Tablet, MID

 Smart Phone

 Power Bank