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Product Introduction

Product parameters

Funtion:4A, Standalone LiFePO4 Battery Charger IC With Photovoltaic Cell MPPT Function

Opration Mode:Switch

Battery:single cell LiFePO4 Battery

Battery No.:1

Vout Range:0V-3.6V

Vin Range:4.5V to 28V

Max Charge Current:4A

Operating Current:1mA

Solar Panel charge:Yes

Chip Temperature Regulation:No

Package:SSOP10

Chip Enable:No

On-chip Power MOSFET:No


General Descriptions:

The CN3801 is a PWM switch-mode LiFePO4 battery charger controller that can be powered by photovoltaic cell with maximum power point tracking function with few external components.

The CN3801 is specially designed for charging LiFePO4 battery with constant current and constant voltage mode. In constant voltage mode, the regulation voltage is fixed at 3.625V with ±40mV accuracy. The constant charge current is programmable with a single current sense resistor.

Deeply discharged batteries are automatically trickle charged at 17.5% of the full-scale current until the cell voltage exceeds 66.5% of constant voltage. The charge cycle is terminated once the charge current drops to 16% of full-scale current, and a new charge cycle automatically restarts if the battery voltage falls below 95.5% of regulation voltage. CN3801 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.

CN3801 is available in a space-saving 10-pin SSOP package.

Applications:

l  Power Bank

l  Hand-held Equipment

l  Battery-Backup Systems

l  Portable Industrial and Medical Equipment

l  Standalone Battery Chargers

Features:

l  Photovoltaic Cell Maximum Power Point Tracking

l  Wide Input Voltage: 4.5V to 28V

l  Complete Charge Controller for single cell LiFePO4 Battery

l  Charge Current Up to 4A

l  High PWM Switching Frequency: 300KHz

l  Constant Voltage: 3.625V±40mV

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


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