EUP8054 Datasheet, PDF (1/17 Pages) Eutech Microelectronics Inc – Standalone Linear Li-Ion Battery Charger With Thermal Regulation in ThinSOT

EUP8054/8054X
Standalone Linear Li-Ion Battery Charger
With Thermal Regulation in ThinSOT
DESCRIPTION
The EUP8054 is a complete constant-current/constant-
voltage linear charger for single cell lithium-ion batteries.
Its ThinSOT package and low external component count
make the EUP8054 ideally suited for portable applications.
Furthermore, the EUP8054 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 MOSFET 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 EUP8054 automatically terminates
the 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 EUP8054 automatically enters a low current
state, dropping the battery drain current to less than 2µA.
The EUP8054 can be put into shutdown mode, reducing
the supply current to 25µA.
Other features include charge current monitor,
undervoltage lockout, automatic recharge and a status pin
to indicate charge termination and the presence of an input
voltage.
FEATURES
z Programmable Charge Current Up to 800mA
z No MOSFET, Sense Resistor or Blocking Diode
Required
z Complete Linear Charger in ThinSOT Package for
Single Cell Lithium-ion Batteries
z Constant-Current/Constant-Voltage Operation with
Thermal Regulation to Maximize Charge Rate
Without Risk of Overheating
z Charges Single Cell Li-Ion Batteries Directly from
USB Port
z Preset 4.2V Charge Voltage with ± 1% Accuracy
z Charge Current Monitor Output for Gas Gauging
z Automatic Recharge
z Charge Status Output Pin
z C/10 Charge Termination
z 25µA Supply Current in Shutdown
z 2.9V Trickle Charge Threshold (EUP8054)
z Available Without Trickle Charge (EUP8054X)
z Soft-Start Limits Inrush Current
z Available in TSOT-25, TDFN-6(3mm*3mm)
Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Cellular Telephones/ PDAs/ MP3 Players
z Charging Docks and CradIes
z Bluetooth Applications
DS8054 Ver1.1 Jan. 2007
1