Funtion：4A, 12V Lead-Acid Battery Charger IC With Photovoltaic Cell MPPT Function
Battery：12V lead-acid battery
Max Charge Current：4A
Solar Panel charge：Yes
Chip Temperature Regulation：No
On-chip Power MOSFET：No
The CN3767 is a PWM switch-mode battery charger controller for 12V lead-acid battery in a small package using few external components.
The CN3767 is specially designed for charging 12V lead-acid battery with trickle charge, constant current charge, over-charge and float charge mode. In over-charge and float charge mode, the regulation voltage is internally set. The constant charge current is programmable with a single sense resistor. The CN3767 can be powered by solar panel with MPPT function.
Deeply discharged batteries are automatically trickle charged at 17.5% of the programmed constant charge current until the cell voltage exceeds 75% of the regulation voltage in over-charge mode. The over-charge is terminated once the charging current drops to 38% of the constant charge current, then CN3767 will enter into float charge mode. A new charge cycle automatically restarts if the battery voltage falls below 83.95% of the over-charge voltage in float-charge mode. CN3767 will automatically enter sleep mode when input voltage is lower than battery voltage.
Other features include undervoltage lockout and status indication, etc.
CN3767 is available in a space-saving 10-pin SSOP package.
l Lead-Acid Battery Charger
l Portable Industrial and
l Standalone Battery Chargers
l Photovoltaic Cell Maximum Power Point Tracking(MPPT)
l Wide Input Voltage: 6.6V to 30V
l Complete Charger Controller for 12V Lead-Acid Battery
l Charge Current Up to 4A
l High PWM Switching Frequency: 300KHz
l Fixed Over-Charge Voltage
l Charging Current is programmed
with a sense resistor
l Automatic Conditioning of Deeply Discharged Batteries
l Automatic Recharge
l Charger Status Indication
l Soft Start
l Battery Overvoltage Protection
l Operating Ambient Temperature
－40℃ to ＋85℃
l Available in 10 Pin SSOP Package
l Pb-free , RoHS Compliant,
and Halogen Free