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ME4054 Datasheet Preview

ME4054 Datasheet

Standalone Linear Li-Ion Battery Charger

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ME4054
Standalone Linear Li-Ion Battery Charger in ThinSOT ME4054-4.2V
General Description
Features
ME4054 is a constant-current/constant-voltage linear
charger for single cell lithium-ion batteries. Its Thin SOT
Programmable Charge Current Up to 800mA
No MOSFET, Sense Resistor or Blocking
package and low external component count make the
ME4054 ideally suited for portable applications.
Diode Required
Complete Linear Charger in ThinSOT Package
Furthermore, the ME4054 is specifically designed to work
within USB power specifications.
for Single Cell Lithium-Ion Batteries
Constant-Current/Constant-Voltage Operation
No external sense resistor is needed, and no blocking
with Thermal Regulation to Maximize Charge
diode is required due to the internal MOSFET architecture.
Thermal feedback regulates the charge current to limit the
Rate Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly
die temperature during high power operation or high
ambient temperature. The charge voltage is fixed at 4.2V,
from USB Port
Preset 4.2V Charge Voltage with ±1%
and the charge current can be programmed externally with
a single resistor. The ME4054 automatically terminates he
charge cycle when the charge current drops to 1/10th the
programmed value after the final float voltage is reached.
When the input supply (wall adapter or USB supply) is
removed, the ME4054 automatically enters a low current
state, dropping the battery drain current to less than
2µA.The ME4054 can be put into shutdown mode,
Accuracy
Automatic Recharge
Charge Status Output Pin
C/10 Charge Termination
25µA Supply Current in Shutdown
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Available in 5-Lead SOT-23 Package
reducing the supply current to 25µA.
Other features include charge current monitor,
Applications
Cellular Telephones, PDAs, MP3 Players
undervoltage lockout, automatic recharge and a status pin
Charging Docks and Cradles
to indicate charge termination and the presence of an input
voltag6e0.0mA Single Cell Li-Ion Charger
Bluetooth Applications
VIN
4.5V TO 6.5V
Complete Charge Cycle (750mAh Battery)
4
VCC
3
BAT
700 CONSTANT CURRENT
4.75
600 CONSTANT
500 POWER
CONSTANT 4.5
VOLTAGAE 4.25
ME4054
600mA
PROG 5
4.2V
GND
Li-Ion
1μF 2
1.65K BATTERY
400
300
VCC=5V
200 θ JA=130/W
100 RPROG=1.65K CHARGE
4.0
3.75
3.5
3.25
TA=25TERMINATED
0
3.0
0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0
TIME(HOURS)
V03
www.microne.com.cn
Page 1 of 16




Microne

ME4054 Datasheet Preview

ME4054 Datasheet

Standalone Linear Li-Ion Battery Charger

No Preview Available !

Pin Configuration
CHRG 1
GND 2
BAT 3
5 PROG
4 VCC
Pin Assignment
Pin
SOT23-5
1
2
3
4
5
Symbol
Description
CHRG
GND
BAT
VCC
PROG
Open-Drain Charge Status Output
Ground θJA
Charge Current Output
Positive Input Supply Voltage
Charge Current Program
ME4054
V03
www.microne.com.cn
Page 2 of 16


Part Number ME4054
Description Standalone Linear Li-Ion Battery Charger
Maker Microne
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ME4054 Datasheet PDF






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