DESCRIPTION
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 bidirectionally 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 inESOP8 package.

FEATURES
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