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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

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


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