LP4062 Datasheet, PDF (1/13 Pages) Lowpower Semiconductor inc – 600mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT

Preliminary Datasheet
LP4062
600mA Standalone Linear Li-Ion Battery Charger with
Thermal Regulation in ThinSOT
General Description
The LP4062 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 LP4062 ideally suited for portable applications.
Furthermore, the LP4062 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 LP4062
automatically terminates the charge cycle when the charge
current drops to 1/10th the programmed value after the final
float voltage is reached. 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
„ Programmable Charge Current Up to 600mA
„ 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
„ Charge Rate Without Risk of Overheating
„ Charges Single Cell Li-Ion Batteries Directly from
USB Port
„ Preset 4.2V Charge Voltage with ± 1% Accuracy
„ Available in SOT23-5 Package
„ Charge Current Monitor Output for Gas
Gauging
„ Automatic Recharge
„ 2.9V Trickle Charge Threshold
„ C/10 Charge Termination
Order Information
LP4062 - □ □ □ □ □
F: Pb-Free
Package Type
B5: SOT23-5
Typical Application Circuit
Vin
1uF +
LED R
4 _{VCC BAT} 3
1 _CHRG
2 _{GND PROG} 5
LP4062B5F
+
3.3K 1uF
BATT
Applications
— Portable Media Players/MP3 players
— Cellular and Smart mobile phone
— PDA/DSC
— Bluetooth Applications
Marking Information
Please see website.
LP4062 –00 Ver. 1.0 Datasheet Nov.-2007
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