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Lithium Ion Battery Charger for Solar-Powered Systems
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General Description£º
The CN3065 is a complete constant-current /constant voltage linear charger for single cell Li-ion and Li Polymer
rechargeable batteries. The device contains an on-chip power MOSFET and eliminates the need for the external
sense resistor and blocking diode. An on-chip 8-bit ADC can adjust charging current automatically based on the
output capability of input power supply, so CN3065 is ideally suited for solar powered system. Furthermore,the
CN3065 is specifically designed to work within USB power specifications. 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 with 1% accuracy, it can also be adjusted with an external resistor. The charge
current can be programmed externally with a single resistor. When the input supply is removed, the CN3065
automatically enters a low power sleep mode , dropping the battery drain current to less than 3uA.Other features
include undervoltage lockout, automatic recharge, battery temperature sensing and charging/termination indicator.
The CN3065 is available in 8-pin DFN package.
Solar Powered System Digital Still Cameras
MP3 Players Bluetooth Applications
Portable Devices Chargers
On-chip 8-bit ADC can adjust charging current automatically based on the output capability of input power supply
Suitable for Solar-Powered System
On-chip Power MOSFET
No external Blocking Diode or Current Sense Resistors Required
Preset 4.2V Regulation Voltage with 1% Accuracy, adjustable with 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 1000mA
Constant-Current/Constant-Voltage 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 DFN-8 Package
Pb-free Available
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