Product Introduction

Product parameters

Funtion：10A, Step-down 1-cell Li+ Battery Charger IC With Photovoltaic Cell MPPT Function

Opration Mode：Switch

Battery：1 cell li-ion battery

Battery No.：1

Vout Range：0V-4.1V

Vin Range：4.5V-30V

Max Charge Current：10A

Operating Current：650uA

Solar Panel charge：YES

Chip Temperature Regulation：YES

Package：QFN-20

Switching Frequency：550kHz

Chip Enable：No

On-chip Power MOSFET：No

General Description:

CN3881 is a step-down PWM switch-mode charger IC for 1-cell lithium-ion battery with few external components in small footprint package.

The CN3881 is specially designed for charging 1-cell lithium ion battery with trickle charge, constant current and constant voltage mode. In constant voltage mode, the regulation voltage is fixed at 4.2V with ±1% accuracy. The constant charging current is set with an external current sense resistor.

When solar panel is used as power supply, CN3881 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 the cell 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 battery voltage falls below 95.8% of regulation voltage. CN3881 will automatically enter 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.

CN3881 is available in 20-pin QFN package.

Applications:

l Handheld Equipment

l Emergency Lighting

l Industrial and Medical Equipment

l Battery Back-up

l Audio/Video Systems

l Electric Appliance

Features:

l Solar Panel MPPT Function

l Standalone Charge Management for 1-cell Lithium-ion Battery

l Wide Input Voltage: 4.5V to 30V