Product Introduction

Product parameters

Funtion:2A, Single-Cell Li-ion Battery Charger IC With Photovoltaic Cell MPPT Function

Opration Mode:Switch

Battery:single-cell lithium io, lithium polymer battery

Battery No.:1

Vout Range:0V-4.2V

Vin Range:4.5V - 6.5V

Max Charge Current:2A

Operating Current:350uA

Solar Panel charge:Yes

Chip Temperature Regulation:Yes


Chip Enable:No

On-chip Power MOSFET:Yes

General Descriptions:

The CN3796 is a highly-integrated switch-mode single-cell lithium ion and lithium polymer battery charger IC that can be powered by photovoltaic cell with maximum power point tracking function with few external components.

The CN3796 is specially designed for charging single-cell lithium ion battery with constant current and constant voltage mode. In constant voltage mode, the regulation voltage is fixed at 4.2V with ±1% accuracy. The constant charge current is set with an external current sense resistor.

Deeply discharged batteries are automatically trickle charged until the cell voltage exceeds 58.3% of the regulation voltage. The charge cycle is terminated once the charge current drops to 21% of full-scale current, and a new charge cycle automatically restarts if the battery voltage falls below 95.8% of regulation voltage. CN3796 will automatically enter sleep mode when input voltage is lower than battery voltage.

Other features include short battery protection, battery over voltage protection, over temperature protection and 2 status indications, etc..

CN3796 is available in thermally-enhanced 10-pin SSOP package.



l  Power Bank

l  Hand-held Equipment

l  E-Cigarette

l  Portable Industrial and Medical Equipment

l  Standalone Battery Chargers


l  Photovoltaic Cell Maximum Power Point Tracking

l  Input Voltage Range: 4.5V to 6.5V

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

l  Charge Current Up to 2A

l  PFM Operation Mode

l  Regulation Voltage: 4.2V±1%

l  Charge Current is set with an External Current Sense Resistor

l  Automatic Charge Current Adjustment according to Loading Capability of Input Supply

l  Automatic Conditioning of Deeply Discharged Batteries

l  Automatic Recharge

l  Short Battery Protection

l  2 Charging Status Indications

l  Battery Overvoltage Protection

l  Over Temperature 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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