EC49018-1A,Single Cell Lithium Battery Charger

EC49018-1A,Single Cell Lithium Battery Charger
General description
The EC49018 is a complete constant – current&constant-voltage linear charger for single cell lithium-ion batteries. Its SOP-8(Exposed PAD) package and low external component count make the EC49018 ideally suited for portable applications. In addition, the EC49018 can work within USB and wall adapter.No blocking diode is required because of its internal PMOSFET architecture which is able to prevent the negative Charge Current. 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 EC49018 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.EC49018 Other features include current monitor, under voltage lockout, automatic recharge and two status pin to indicate charge termination and the presence of an input voltage.

Features
Programmable Charge Current Up to 1000mA
No MOSFET, Sense Resistor or Blocking Diode Required
Complete Linear Charger in SOP-8 Package for Single Cell Lithium-Ion Batteries
Constant-Current/Constant-Voltage
Charges Single Cell Li-Ion Batteries Directly from USB Port
Preset 4.2V Charge Voltage with ±5% Accuracy
Automatic Recharge
Two Charge Status Output Pins
C/10 Charge Termination
9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Available Radiator in SOP-8(Exposed PAD) Package, the Radiator need connect GND or impending
Applications
Cellular Telephones, PDA, MP3 Players
Charging Docks and Cradles
MP3、MP4 Player
USB Bus-Powered Chargers, Chargers
Pin Configurations

Ordering info

Typical Applications circuit


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