Product Introduction

Product parameters

Funtion：6A,Step-down Multi-cell Li+ Battery Charger IC With Photovoltaic Cell MPPT Function

Opration Mode：Switch

Battery：Li+ Battery,LiFePO4

Battery No.：Multi-cell

Vout Range：0V-25V

Vin Range：6.5V-30V

Max Charge Current：6A

Operating Current：650uA

Solar Panel charge：YES

Package：QFN20

Switching Frequency：550kHz

Chip Enable：No

On-chip Power MOSFET：No

General Description:

CN3889 is a step-down PWM switch-mode charger IC for multi-cell lithium-ion batteries with few external components in small footprint package.

The CN3889 is specially designed for charging multi-cell lithium ion batteries with trickle charge, constant current and constant voltage mode. In constant voltage mode, the regulation voltage is set with external resistor divider. The constant charging current is set with an external current sense resistor.

When solar panel is used as power supply, CN3889 can automatically adjust charge current to track solar panel’s maximum power point.

Deeply discharged batteries are automatically trickle charged at 25% of the full-scale charge current until FB pin voltage exceeds 66.6% of regulation voltage. The charge cycle is terminated once the charge current drops to 15% of full-scale charge current, and a new charge cycle automatically restarts if FB pin voltage falls below 95.8% of regulation voltage. CN3889 will automatically enter low-power sleep mode when input voltage is lower than battery voltage.

Other features include JEITA-compliant battery temperature monitoring, battery reverse current blocking, battery over voltage protection, 2 open-drain status indications, etc.

CN3889 is available in 20-pin QFN package.

Applications:

l Handheld Equipment

l Emergency Lighting

l Industrial and Medical Equipment

l Electric Tools

l Audio/Video Systems

Features:

l Solar Panel MPPT Function

l Standalone Charge Management for multi-cell Lithium-ion Battery

l Wide Input Voltage: 6.5V to 30V

l Charge Current up to 6A