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Multi-Chemistry Battery Charger for Solar-Powered Systems
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General Description:
CN3082 is a mutli-chemistry battery charge control chips for single cell lithium batteries, lithium iron phosphate and
single or two to four nickel-metal hydride batteries. The device contains an on-chip power MOSFET and eliminates
the need for the external sense resistor and blocking diode. CN3082 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. Chip integrates a high-precision voltage comparator, with 1% accuracy,
you can accurately set the constant current charge termination voltage. An on-chip 8-bit ADC can adjust charging
current automatically based on the output capability of input power supply, so CN3082 is ideally suited for solar
powered system. The charge current can be programmed externally with a single resistor. When the input supply is
removed, the CN3082 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 CN3082 is available in 8-pin SOP8 package.
Cell Phone Digital Camera
Electronic Dictionary Portable Devices
The need for lithium batteries, nickel metal hydride batteries, lithium iron phosphate and lead-acid battery charging
Suitable for the USB port or AC adapter
On-chip Power MOSFET
Constant current charge voltage accuracy of 1%
On-chip 8-bit ADC can adjust charging current automatically based on the output capability of input power supply
Suitable for Solar-Powered System
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-Temperature 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 LED drive or MCU interface
Automatic Recharge
Battery Temperature Sensing
Available in SOP-8 Package
Pb-free Available
Application  Note:
Quick Start of CN31XX Demo Board
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