ETA9742 LED-indicators Datasheet

ETA9742 Datasheet, PDF, Equivalent


Part Number

ETA9742

Description

2.4A Boost and 3 LED-indicators

Manufacture

ETA

Total Page 5 Pages
Datasheet
Download ETA9742 Datasheet


ETA9742
QQ:3065595854 2657844277 2515156676 1303729348 1494165259 3382244500
ETA9742
3A Switching Charger, 2.4A Boost and 3 LED-indicators for battery level,
charge/discharge status in One ESOP8 with Single Inductor
DESCRIPTION
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.
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
LEDs for battery level indication and
charge/discharge status indication
APPLICATIONS
Tablet, MID
Smart Phone
Power Bank
TYPICAL APPLICATION
ORDERING INFORMATION
PART No.
ETA9742E8A
PACKAGE
ESOP8
TOP MARK
ETA9742
Pcs/Reel
2500
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ETA9742
QQ:3065595854 2657844277 2515156676 1303729348 1494165259 3382244500
ETA9742
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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Features QQ:3065595854 2657844277 2515156676 1303 729348 1494165259 3382244500 ETA9742 3 A Switching Charger, 2.4A Boost and 3 L ED-indicators for battery level, charge /discharge status in One ESOP8 with Sin gle Inductor DESCRIPTION ETA9742 is a switching Li-Ion battery charger capabl e of delivering up to 3A of charging cu rrent to the battery and also capable o f delivering up to 5V/2.4A in boost ope ration, with high efficiency in both ch arging mode and boost mode. It also inc ludes a fuel gauge system for power ind ication. For charging, it uses a propri etary control scheme that eliminates th e current sense resistor for convention al constant current control, maximizing efficiency, reducing charging time and reducing costs. It can also output a 5 V voltage in the reversed direction by boosting from the battery. It only need s a single inductor to provide power bi directionally with a proprietary automa tic mode detect and switch scheme. ETA9 742 is an ideal all-in-one solution for battery charging and di.
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