EC49016 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – Standalone Linear Lithium Battery Charger

EC49016
Standalone Linear Lithium Battery Charger
Introduction
(General Description)
EC49016 is a complete constant-current & constant
voltage linear charger for single cell lithium-ion
batteries. Its SOT-23 package and low external
component count make EC49016 ideally suited for
portable applications. Furthermore, the EC49016 is
specifically designed to work within USB power
specification. At the same time, EC49016 can also be
used in the standalone lithium-ion battery charger.
No external sense resistor is needed, and no
blocking diode is required due to the internal MOSFET
architecture. Thermal feedback regulates the charger
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
EC49016 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 EC49016 automatically enters a low
current stage, dropping the battery drain current to less
than 2μA. The EC49016 can be put into shutdown
mode, reducing the supply current to 20μA.
Other features include charge current monitor,
under-voltage 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 Constant-Current/Constant-Voltage Operation
with Thermal Protection 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 20μA Supply Current in Shutdown
z 2.9V Trickle Charge Threshold
z Available Without Trickle Charge
z Soft-Start Limits Inrush Current
z Available in 5-Lead SOT-23 Package
Applications
z Cellular Telephones, PDA, MP3 Players
z Charging Docks and Cradles
z Bluetooth Applications
Pin Configuration
Ordering/Marking Information
Package
SOT-23-5L
Part Number
EC49016B2-F
Marking
Marking Information
016b
Starting with 6, a bar on top _{Ordering Information}
of 6 is for production year 2005,
and underlined 6 is for year
2006. The naming pattern
continues with consecutive
characters for later years.
EC49016X - F
The last character is the week
code. (A-Z: 1-26, a-z: 27-52)
F: Lead-Free
A dot on top right corner is for
Package: B2 = SOT-23-5L
lead-free process.
E-CMOS Corp. (www.ecmos.com.tw)
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2006/05/18