ETA9741 Fuel Gauge Datasheet

ETA9741 Datasheet, PDF, Equivalent


Part Number

ETA9741

Description

2.4A Boost and Fuel Gauge

Manufacture

ETA

Total Page 3 Pages
Datasheet
Download ETA9741 Datasheet


ETA9741
ETA9741
2A Switching Charger, 2.4A Boost and Fuel Gauge with Single Inductor
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 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.
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
TYPICAL APPLICATION
ORDERING INFORMATION
PART No.
ETA9741E8A
PACKAGE
ESOP8
TOP MARK
ETA9741
Pcs/Reel
4000
www.etasolution.com
1
Powering Minds of the Smart

ETA9741
ETA9741
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum
rating conditions for long periods may affect device reliability.)
OUT, SW Voltage ..........................................................0.3V to 6V
All Other Pin Voltage ..................................................0.3V to 6V
SW to ground current……………………..…………...Internally limited
Operating Temperature Range …………………....…–40°C to 85°C
Storage Temperature Range ……..……….………….–55°C to 150°C
Thermal Resistance
JA Jc
ESOP8 …………………………………………...10……………50............ °C/W
Lead Temperature (Soldering, 10ssec) ……………………….260°C
ESD HBM (Human Body Mode) …………….………………..………….2KV
ESD MM (Machine Mode) ……………………..………………………….200V
ELECTRICAL CHACRACTERISTICS
(VIN = 5V, unless otherwise specified. Typical values are at TA = 25oC.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
BUCK MODE
USB Range
4.5 5.5 V
USB UVLO Voltage
Rising, Hys=500mV
4.5 V
USB Operating Current as BUCK
Switcher Enable, Switching
Switcher Enable, No Switching
5
800
mA
μA
BATTERY CHARGER
Battery CV Voltage
IBAT =0mA, default
4.17 4.21 4.25
V
Charger Restart Threshold
From DONE to Fast Charge
-160 mV
Battery Pre-Condition Voltage
VBAT Rising Hys=250mV
2.8 V
Pre-Condition Charge Current
200 mA
Fast Charge Current
2A
Charge Termination Current
200 mA
Charge Termination Blanking time
16 S
BOOST MODE
BATT Ok Threshold
Rising, HYS=0.4 V
3.2 V
Output Voltage Range
Iout=0
5.05 5.1 5.15
V
Quiescent Current At BATT
Vbat=3.6V
80 μA
Switching Frequency
VIN<4.3V
550 650 750 KHz
Inductor Peak Current Limit
5.0 A
Maximum Duty Cycle
90 %
High side Pmos Rdson
ISW =500mA
75
Low side Nmos Rdson
ISW =500mA
70
www.etasolution.com
2
Powering Minds of the Smart


Features ETA9741 2A Switching Charger, 2.4A Boos t and Fuel Gauge with Single Inductor DESCRIPTION ETA9741 is a switching Li-I on battery charger capable of deliverin g 2A of charging current to the battery and also capable of delivering up to 5 V/2.4A in boost operation, with high ef ficiency in both charging mode and boos t mode. It also includes a fuel gauge s ystem for power indication. For chargin g, it uses a proprietary control scheme that eliminates the current sense resi stor for conventional constant current control, maximizing efficiency, reducin g charging time and reducing costs. It can also output a 5V voltage in the rev ersed direction by boosting from the ba ttery. 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 an d discharge applications, such as power banks, smart phones, and tablets with only one USB port that can be used for charging battery functio.
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