This is one of the Battery Charger IC types.
Part Number: CN3791
Function: 4A, Standalone Li-ion Battery Charger IC
Package: 10 Pin SSOP Type
Manufacturer: http://www.consonance-elec.com/
Images:
Description
The CN3791 is a PWM switch-mode lithium ion battery charger controller that can be powered by photovoltaic cell with maximum power point tracking function with few external components. 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.
Pinout

Features
1. Photovoltaic Cell Maximum Power Point Tracking
2. Wide Input Voltage: 4.5V to 28V
3. Complete Charge Controller for single cell Lithium-ion Battery
4. Charge Current Up to 4A
5. High PWM Switching Frequency : 300KHz
Applications
1. Power Bank
2. Hand-held Equipment
3. Battery-Backup Systems
4. Portable Industrial and Medical Equipment
5. Standalone Battery Chargers


