Product Introduction

Product parameters

Funtion：4A, 12V Lead-Acid Battery Charger IC

Opration Mode：Switch

Battery：12V lead-acid battery

Vout Range：0V-14.8V

Vin Range：6.6V-30V

Max Charge Current：4A

Operating Current：1mA

Solar Panel charge：No

Chip Temperature Regulation：No

Package：SOP8

Switching Frequency：315kHz

Chip Enable：No

On-chip Power MOSFET：No

General Descriptions:

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.

Applications:

l Mobile Loadspeaker

l Lead-Acid Battery Charger

l UPS

l Portable Industrial and
Medical Equipment

l Standalone Battery Chargers

Features:

l Wide Input Voltage: 6.6V to 30V

l Complete Charger Controller for 12V Lead-Acid Battery

l Charge Current Up to 4A