CN3083 Lithium Ion Battery Charger for Solar-Powered Systems

General Description:

The CN3083 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 CN3083 is ideally suited for solar powered system. Furthermore, the CN3083 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 CN3083 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 CN3083 is available in a thermally enhanced 8-pin SOP package. 

Features:

•  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 600mA 
• 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 SOP8 Package 
• Datasheet