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ETA9640 Datasheet Preview

ETA9640 Datasheet

5V/1A Synchronous Boost

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ETA9640
5V/1A Synchronous Boost with 1A Linear Charger for Power Bank
DESCRIPTION
The ETA9640 is a fully integrated power management unit
specifically designed for Power Bank, Mobile Charger, Backup
Battery Charger applications. It consists of a high efficiency
synchronous step-up boost converter and a linear battery
charger. The boost can provide up to 1A output current at 5V
of from a Li-Ion battery input voltage, while the charger can
charge up to 1A of current from an AC adapter input. The boost
incorporates circuits that disconnect the input from output,
during shutdown, short-circuit, output current overloading, or
other events when output is higher than the input. This not only
eliminates the need for an external MOSFET and its control
circuitry to disconnect the input from output, also provides
robust output overload protection. Using a patent pending
technique to drive the charger LED indicator, it eliminates the
need for a micro-controller normally needed in mobile
chargers. While saving the cost of a micro-controller, since
the whole units only consumes less than 100uA of quiescent
current during no load, when considering standby time for one
charge, it is a much superior solution comparing to the
traditional solution that needs a micro-controller which
normally consumes up to 1mA current.
ETA9640 is available in ESOP8 package.
FEATURES
2in 1: A Synchronous boost plus A Charger
Short-circuit Protection
5W Output Power for the Boost
Boost Output to Input Reversed Current Protection
Up to 1A Charging
Up to 96% Efficiency during Boosting
100μA No load IQ
Programmable Charging Current
APPLICATIONS
Portable Power Bank
Portable 3G/4G WiFi Hotspot
Tablet PC
Portable Device power with Li-ion battery and USB output
ORDERING INFORMATION
PART
ETA9640E8A
PACKAGE PIN
ESOP-8
TOP MARK
ETA9640
YWWL ( Date Code)
TYPICAL APPLICATION
Mini USB
10uF
2.2-4.7uH
18650
锂电池
10uF
18
27
ETA9640
36
45
1.2K
充电电流(A)
1000/1.2K
22uF
1uF
1nF 放电指示部分,可省略
10K
47K 电量指示灯
120K
36K
100K
USB
V+ D- D+ V-
Typical Application Circuit
www.etasolution.com
1
Powering Minds of the Smart




ETA

ETA9640 Datasheet Preview

ETA9640 Datasheet

5V/1A Synchronous Boost

No Preview Available !

ETA9640
ABSOLUTE MAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.)
Pin1 Voltage ..................................................................................................................................................................................0.3V to 6.0V
Pin5 Voltage .................................................................................................................................................................................0.3V to 5.0V
All Other Pin Except Pin5 Voltage ..............................................................................................................................VIN0.3V to VIN+0.3
Pin4 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
ESOP-8….………………………………………………………………………………………………………………………..….……………..50 ..............10...... °C/W
ELECTRICAL CHACRACTERISTICS
(VIN = 3.6V, VOUT = 5V, unless otherwise specified. Typical values are at TA = 25oC.)
PARAMETER
CONDITIONS
Output USB Voltage Range
Quiescent Current from battery
Vbattery=3.6V, No load
Shutdown Supply Current from battery Vpin3=GND
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Input miniUSB Voltage
Charge Termination Voltage
Recharge Threshold
Trickle Charge Voltage threshold
Charging Current
=1000/R1, when R1=1K,
Trickle Charge Current
Termination Charge Current Threshold =I_term/I_charge_set
LED Sink Current
MIN TYP MAX UNITS
4.8 5.0 5.2 V
100 μA
0.5 5 μA
1.2 1.8 2.4 MHz
90 %
1.8 2.1
A
4.5 6.0 V
4.15 4.2 4.24 V
4.05 V
2.9 V
0.85 1
1.15 A
45 mA
0.1
5 mA
TYPICAL CHARACTERISTICS
(Typical values are at TA = 25oC unless otherwise specified.)
www.etasolution.com
2
Powering Minds of the Smart


Part Number ETA9640
Description 5V/1A Synchronous Boost
Maker ETA
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