ME4064A
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800mA Lithium Ion Battery Linear Charger ME4064A
General Description Features
Applications
●Cellular Telephones, PDAs, MP3 Players
●Charging Docks and Cradles
●Bluetooth Applications
ME4064A is a complete constant-current/constant
voltage linear charger for single cell lithium-ion
batteries. Furthermore the ME4064A is specifically
designed to work within USB power specifications.
No external sense resistor is needed and no
blocking diode is required due to the internal
PMOSFET architecture .Thermal feedback regulates
the charge current to limit the die temperature during
high power operation or high ambient
temperature .The charge voltage is fixed at 4.2V,and
the charge current can be programmed externally with
a single resistor. The ME4064A automatically
terminates the charge cycle when the charge current
drops to 1/10
th
the programmed value after the final
float voltage is reached.
When the input supply (wall adapter or USB supply)
is removed the ME4064A automatically enters a low
current state dropping the battery drain current to less
than 2μA.The ME4064A can be put into shutdown
mode reducing the supply current to 55μA.
Other features include charge current monitor,
undervoltage lockout, automatic recharge and a
status.
●Protection of battery cell reverse connection
●No MOSFET sense resistor or blocking diode
required
●Complete Linear Charger in ThinSOT Package for
Single Cell Lithium-Ion Batteries
●Constant-Current/Constant-Voltage operation with
thermal regulation to maximize Rate Without risk
of overheating.
● Preset 4.2V charge voltage with ±1% accuracy
● Automatic Recharge
●Charges Single Cell Li-Ion Batteries Directly from
USB Port
●C/10 charge termination
● 55μA supply current in shutdown
● 2.9V trickle current charge threshold
● Soft-Start limits inrush current
●Charge Status Output Pin
Package
●5-pin SOT23-5
●6-pin- DFN2*2-6L
CALL:13823513305
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