General Description Features

Typical charge cycle(1000mAh battery)

Applications

Typical charge cycle(1000mAh battery)

●Cellular Telephones

●Digital Still Cameras

●MP3 Players

●Bluetooth Applications

●Portable Devices

●USB Bus-Powered Chargers

ME4056 is a complete constant-current/constant voltage

linear charger for single cell lithium-ion batteries. With a

thermally enhanced 8-PIN SOP package on the bottom

and low external component count make the ME4056

ideally suited for portable applications. Furthermore the

ME4056 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 ME4056 automatically

terminates the charge cycle when the charge current 0s

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 ME4056 automatically enters a low current

state 0ping the battery drain current to less than

2μA.The ME4056 can be put into shutdown mode reducing

the supply current to 55μA.

Other features include Battery temperature monitor,

under-voltage lockout, automatic recharge and two status

pins to indicate charge and charge termination.

●Protection of battery cell reverse connection

● Programmable charge current up to 1A

●No MOSFET sense resistor or blocking diode

required

●Complete linear Charger in SOP8 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

● Two Status Indication for Charge status, no

battery and battery failure indicators

● C/10 charge termination

● 55μA supply current in shutdown

● 2.9V trickle current charge threshold

● Soft-Start limits inrush current

● Battery Temperature Sensing

● Available in SOP8-PP package

Pin Configuration

Pin Assignment

Pin Num. Symbol Function