Product Introduction

Product parameters

Funtion:4A, Multi-Chemistry Battery Charger

Opration Mode:Switch

Battery:lithium ion,LiFePO4 or Lithium Titanate batteries

Vout Range:0V-28V

Vin Range:6.6V to 30V

Max Charge Current:4A

Operating Current:1mA

Solar Panel charge:No

Chip Temperature Regulation:No


Chip Enable:No

On-chip Power MOSFET:No

General Descriptions:

The CN3765 is a PWM switch-mode multi-chemistry battery charger controller in a small package using few external components.

The CN3765 is specially designed for charging lithium ionLiFePO4 or Lithium Titanate batteries with constant current and constant voltage mode. In constant voltage mode, the regulation voltage is set by 2 external resistors. The constant charging current is programmable with a single current sense resistor.

Deeply discharged batteries are automatically trickle charged at 17.5% of the programmed constant charging current until the cell voltage exceeds 66.5% of constant voltage. The charge cycle is terminated once the charging current drops to 16% of full-scale current, and a new charge cycle automatically restarts if the charge current rises above 58.8% of full-scale charge current. CN3765 will automatically enter sleep mode when input voltage is lower than battery voltage.

Other features include under voltage lockout, battery over voltage protection, status indication, etc.

CN3765 is available in a space-saving 10-pin SSOP package.


l  Hand-held Equipment

l  Battery-Backup Systems

l  Portable Industrial and Medical Equipment

l  Standalone Chargers for Lithium ion,

LiFePO4 or Lithium Titanate Batteries


l  Wide Input Voltage: 6.6V to 30V

l  Complete Charge Controller for Single- or Multi-cell Lithium ion, LiFePO4 or Lithium Titanate Batteries

l  Charge Current Up to 4A

l  PWM Switching Frequency: 310KHz

l  Can be used as Voltage Source when Battery is Absent

l  Charging Current is programmed with a current sense resistor

l  Automatic Conditioning of Deeply Discharged Batteries

l  Automatic Recharge

l  Charging 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, Halogen Free

Tools and Documents




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