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500mA USB-Compatible Lithium Battery Charger
Product Profile
     Reference articles
General Description£º
The CN3062 is a complete constant-current /constant voltage linear charger for single cell lithium rechargeable
battery. The device contains an on-chip power MOSFET and eliminates the need for the external current sense
resistor and blocking diode. Furthermore, the CN3062 is specifically designed to work within USB power
specifications. Its low external component count makes CN3062 ideally suited for portable applications.Thermal
feedback regulates the charge current to limit the die temperature during high power operation or high ambient
temperature. The regulation voltage is internally fixed at 4.2V, it can also be adjusted with an external resistor.
The charge current can be programmed externally with a single resistor. When the input supply (wall adapter or
USB supply) is removed, the CN3062 automatically enters a low power sleep mode, dropping the battery drain
current to less than 3uA. Other features include under-voltage lockout, automatic recharge, battery temperature
sensing and charging/termination indicator.
The CN3062 is available in a thermally enhanced 8-pin SOP package.
Mobile Phones Digital Still Cameras
MP4 Players Electronic Dictionary
Portable Devices Variety Of Chargers
Charges Single Cell Li-Ion Batteries Directly from USB Port or AC Adaptor
Input Voltage Range From 4.35V to 6V
On-chip Power MOSFET
No external Blocking Diode or Current Sense Resistors Required
Constant Charge Voltage 4.2V, and also can be adjustable by an external resistor
Precharge Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage
¡¡ of Charge
Continuous Programmable Charge Current Up to 500mA
Constant-Current/Constant-Voltage/Constant-Temp Operation with Thermal Regulation to Maximize Charge Rate
¡¡ Without Risk of Overheating
Automatic Low-Power Sleep Mode When Input Supply Voltage is Removed
Status Indication for LEDs or uP Interface
C/10 Charge Termination
Automatic Recharge
Battery Temperature Sensing
Available in SOP8 Package
Pb-free Available
Application Note£º
Quick Start of CN31XX Demo Board
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