ETA9740 Gauge Datasheet

ETA9740 Datasheet, PDF, Equivalent


Part Number

ETA9740

Description

2.4A Boost and Fuel Gauge

Manufacture

ETA

Total Page 5 Pages
Datasheet
Download ETA9740 Datasheet


ETA9740
ETA9740
3A Switching Charger, 2.4A Boost and Fuel Gauge in One ESOP8 with Single
Inductor
DESCRIPTION
ETA9740 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. ETA9740 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.
ETA9740 is suitable for charging a 4.2V Li-ion battery. And
ETA9740 is in ESOP8 package.
FEATURES
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
4 LEDs Fuel gauge
APPLICATIONS
Tablet, MID
Smart Phone
Power Bank
TYPICAL APPLICATION
ORDERING INFORMATION
PART No.
ETA9740E8A
PACKAGE
ESOP8
TOP MARK
ETA9740
Pcs/Reel
2500
www.etasolution.com
1
Powering Minds of the Smart

ETA9740
ETA9740
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
Riset=56K
Riset=91K
3A
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
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2
Powering Minds of the Smart


Features ETA9740 3A Switching Charger, 2.4A Boos t and Fuel Gauge in One ESOP8 with Sing le Inductor DESCRIPTION ETA9740 is a s witching Li-Ion battery charger capable of delivering up to 3A of charging cur rent to the battery and also capable of delivering up to 5V/2.4A in boost oper ation, with high efficiency in both cha rging mode and boost mode. It also incl udes a fuel gauge system for power indi cation. For charging, it uses a proprie tary control scheme that eliminates the current sense resistor for conventiona l constant current control, maximizing efficiency, reducing charging time and reducing costs. It can also output a 5V voltage in the reversed direction by b oosting from the battery. It only needs a single inductor to provide power bi- directionally with a proprietary automa tic mode detect and switch scheme. ETA9 740 is an ideal all-in-one solution for battery charging and discharge applica tions, such as power banks, smart phone s, and tablets with only one USB port that can be used for char.
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