The CN3761 is a solar panel charge controller IC manufactured by Consonance Electronics. It is designed to efficiently charge single-cell lithium-ion or lithium-polymer batteries from solar panels. This IC incorporates MPPT (Maximum Power Point Tracking) functionality to optimize the energy harvested from the solar panel.

Applications:

• Solar-powered chargers
• Portable solar power banks
• Solar garden lights
• DIY solar projects
• Battery-powered devices with solar charging capability

Features:

• Maximum Power Point Tracking (MPPT)
• Automatic battery voltage detection
• Overcharge protection
• Deep discharge protection
• Short circuit protection
• Thermal protection
• Automatic recharge

Benefits:

• Efficiently charges lithium-ion/polymer batteries from solar panels, maximizing energy harvesting.
• Extends battery life with overcharge, deep discharge, and short circuit protection features.
• Simple and compact design suitable for portable applications.
• Reduces energy waste through MPPT functionality.

Additional Details:

The CN3761 utilizes an MPPT algorithm to dynamically adjust the charging parameters to extract the maximum power available from the solar panel under varying sunlight conditions. It automatically detects the battery voltage and adjusts the charging current accordingly. Protection features prevent damage to the battery due to overcharging, deep discharging, short circuits, and excessive temperatures. The automatic recharge feature ensures that the battery remains fully charged when sunlight is available.

To get the accurate parameters for voltage, current, temperature and other operating conditions, the device datasheet provided by Consonance must be examined and adhered to.