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Product Information
Your Position £ºProduct
¡¡ ¡¡
- Voltage detector IC ¡¡
- Reset IC ¡¡
- Li+ Battery Charger IC
- Coin Battery Charger IC
- LA Battery Charger IC
- LiFePO4 Battery Charger IC
- Solar Panel-Powered Charger IC
- NIMH Battery Charger IC
- Li+ Titanate Battery Charger IC
- WLED Driver
- DC-DC Converter
- Amplifiers
5A, Multi-Chemistry Battery Charger IC
With Photovoltaic Cell MPPT Function
Product Profile
    Application Note
General Description£º
The CN3722(Note 1) is a PWM switch-mode battery charger controller that can be powered by photovoltaic cell with
maximum power point tracking function. The CN3722 is specially designed for charging 1 or multi-cell lithium ion
batteries or LiFePO4 batteries with constant current and constant voltage mode. In constant voltage mode,the
regulation voltage is set by the external resistor divider. The constant charging current is programmable with a single
current sense resistor. Deeply discharged batteries are automatically trickle charged at 15% of the programmed
constant charging current until the cell voltage exceeds 66.7% of the regulation voltage. In constant voltage mode,
the charging current decreases gradually, the charge cycle will be terminated when the charging current drops to
9.5% of the full-scale current, and a new charge cycle automatically restarts if the battery voltage falls below 95.8%
of the regulation voltage in constant voltage mode.CN3722 will automatically enter sleep mode when input voltage
is lower than battery voltage. Other features include undervoltage lockout, battery temperature monitoring and status
indication, etc.
CN3722 is available in a space-saving 16-pin TSSOP package.
Electric Tools The Charger Powered by Photovotaic cell
Battery-Backup Systems Standalone Battery Chargers Note 1: Patent Pending
Photovoltaic Cell Maximum Power Point Tracking
Wide Input Voltage: 7.5V to 28V
Complete Charger Controller for 1 or multi-cell Lithium-ion Battery or LiFePO4 Battery
Charge Current Up to 5A
High PWM Switching Frequency: 300KHz
Constant Charging Voltage Set By the External Resistor Divider
Charging Current is programmed with a sense resistor
Automatic Conditioning of Deeply Discharged Batteries
Battery Temperature Monitoring
2 Status Indications
Soft Start
Battery Overvoltage Protection
Operating Ambient Temperature £­40¡æ to £«85¡æ
Available in 16 Pin TSSOP Package
Pb-free , RoHS Compliant, and Halogen Free
Application Note£º
Application Note for TEMP
Quick Start of CN37XX Demo Board
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