CN3761 Lithium Battery Charger Protection Board Module 5V-15V for 4.2V Solar Panel

The CN3761 Lithium Battery Charger Protection Board Module is designed for efficient charging of single-cell lithium batteries (3.6V/4.2V) using solar panels. It operates on a wide input voltage range of 5V to 15V and features integrated charging management and protection functions, including overcharge and over-discharge protection. This module supports a charging current up to 1.2A, with the option to increase the maximum charging current over 3A by configuration. Its PWM switch-mode design ensures stable and accurate charging with an adjustable constant voltage of 4.2V ± 1%. The module includes status indicators for charging and charge completion, along with a soft start function for versatile application in solar-powered systems.

Features:

• Suitable for single-cell lithium-ion batteries (3.6V/4.2V)
• Maximum charging current configurable up to 3A
• Constant current and constant voltage charging with ±1% accuracy
• PWM switch-mode charging controller for efficient power management
• Automatic trickle charge for deeply discharged batteries
• Automatic recharge function to maintain battery capacity
• Integrated overcharge, over-discharge, and under-voltage protection
• Charging status and completion indication
• Soft start function and sleep mode for energy efficiency

Specifications:

• Input Voltage: 5V to 15V DC
• Output Battery Voltage: 4.2V (adjustable upward with external resistor)
• Maximum Charging Current: 1.2A (configurable up to >3A)
• PWM Switching Frequency: approx. 300KHz
• Operating Temperature Range: -40°C to +85°C
• Package: 10-pin SSOP
• Dimensions: Height approx. 9mm

Application:

• Solar panel battery charger module 5V-15V
• Portable solar chargers and power banks
• Battery backup systems
• Handheld and portable electronic devices
• Industrial and medical portable equipment

Package Includes:

• 1 x CN3761 Lithium Battery Charger Protection Board Module 5V-15V for 4.2V Solar Panel