Funtion：4A, 12V Lead-Acid Battery Charger IC
Battery：12V lead-acid battery
Max Charge Current：4A
Solar Panel charge：No
Chip Temperature Regulation：No
On-chip Power MOSFET：No
The CN3768 is a PWM switch-mode battery charger controller for 12V lead-acid battery in a small package using few external components.
The CN3768 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.
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 CN3768 will enter 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. CN3768 will automatically enter sleep mode when input voltage is lower than battery voltage.
Other features include undervoltage lockout and status indication, etc.
CN3768 is available in a space-saving 8-pin SOP package.
l Mobile Loadspeaker
l Lead-Acid Battery Charger
l Portable Industrial and
l Standalone Battery Chargers
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: 315KHz
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 8 Pin SOP Package
l Pb-free , RoHS Compliant,
and Halogen Free