Product Introduction

Product parameters

Funtion：2A, Standalone Li-ion Battery Charger

Opration Mode：Switch

Battery：single-cell lithium io, lithium polymer battery

Battery No.：1

Vout Range：0V-4.2V

Vin Range：4.5V to 6.5V

Max Charge Current：2A

Operating Current：510uA

Chip Temperature Regulation：No

Package：eSOP8

On-chip Power MOSFET：Yes

General Descriptions:

The CN3798 is a highly-integrated switch-mode single-cell lithium ion and lithium polymer battery charger IC that can be powered by photovoltaic cell with few external components.

The CN3798 charges battery with constant current and constant voltage mode. Deeply discharged batteries are automatically trickle charged until the cell voltage exceeds 2.45V. After battery voltage rises above 2.45V, CN3798 enters constant current mode, in which the constant charge current is internally fixed at 2A. In constant voltage mode, the regulation voltage is fixed at 4.2V with ±1% accuracy.

The charge cycle is terminated once the charge current drops to 200mA, and a new charge cycle automatically restarts if the battery voltage falls below 4.06V.

CN3798 will automatically enter sleep mode when input voltage is lower than battery voltage.

Other features include JEITA-compliant battery temperature monitoring, short battery protection, battery over voltage protection, junction over temperature protection and 2 status indications, etc.

CN3798 is available in thermally-enhanced 8-pin SOP package.

Applications:

l Power Bank

l Hand-held Equipment

l E-Cigarette

l Portable Industrial and Medical Equipment

l Standalone Battery Chargers

Features:

l Input Voltage Range: 4.55V to 6.5V

l Complete Charger IC for single-cell Li-ion and Li-Polymer Battery

l PFM Operation Mode

l Regulation Voltage: 4.2V±1%