IP2312 3A Type-C Lithium Battery Charger Module 4.2V

The IP2312 3A Type-C Lithium Battery Charger Module is a compact, high-current charging board designed for single-cell lithium-ion and lithium-polymer batteries.

Built around the IP2312 synchronous switching charging IC, this module converts a regulated 5V DC input into a controlled 4.2V battery charging supply. It supports charging currents up to 3A, making it suitable for compatible high-capacity and high-charge-rate lithium batteries.

Compared with conventional linear charging circuits, the IP2312 uses an efficient switching architecture that reduces power losses and improves charging efficiency.

Its compact design, USB Type-C connector and clearly labelled connection terminals make it convenient for rechargeable electronic devices, robotics, portable instruments and DIY battery projects.

Key Features

• IP2312 Charging Controller: Integrated synchronous switching charger for single-cell lithium batteries.
• Up to 3A Charging Current: Supports higher-current charging for batteries rated to accept the selected current.
• USB Type-C Input: Convenient connection to a regulated 5V USB power supply.
• 4.2V Charging Voltage: Designed for standard 3.6V/3.7V nominal lithium-ion and LiPo batteries.
• CC/CV Charging: Uses constant-current and constant-voltage charging stages.
• High Efficiency: Up to approximately 95% conversion efficiency under suitable operating conditions.
• Adjustable Charging Current: Charging current can be configured through the controller’s external programming resistor.
• LED Status Indicators: Provides charging and charge-completion status.
• Automatic Recharge: Charging resumes when battery voltage drops below the controller’s recharge threshold.
• Compact PCB: Suitable for integration into portable and rechargeable electronics.

Technical Specifications

Applications

1. Rechargeable 18650 Battery Projects

The IP2312 module can charge a single compatible 18650 lithium-ion battery using a suitable regulated 5V power supply.

DIYGH stocks the 18650 Li-ion Rechargeable Battery 3.7V 2500mAh for portable electronics and DIY battery projects.

Always select a charging current within the battery manufacturer’s permitted charging specifications. The maximum 3A setting should not automatically be used for every 18650 cell.

2. Portable Electronic Devices

Suitable for integrating rechargeable battery charging into portable instruments, electronic controllers and compatible battery-powered equipment.

3. Robotics and Embedded Systems

Create rechargeable battery systems for small robotics projects, wireless sensors and embedded electronic devices.

4. DIY Battery Charging Circuits

Build compact charging systems for compatible single-cell lithium batteries using a USB Type-C power input.

For experimental projects, the 1-Slot 18650 Battery Holder Case provides a convenient method of connecting an 18650 battery without soldering directly to the cell.

5. Electronics Education and Prototyping

Study lithium battery charging, constant-current and constant-voltage regulation, switching converters and rechargeable power system design.

How the IP2312 Charging Module Works

The IP2312 uses a controlled charging process to manage battery charging.

1. Pre-Charging Stage

When a deeply discharged battery is detected within the controller’s supported recovery range, charging begins at a reduced current before transitioning to the normal charging stage.

2. Constant-Current Stage

The controller supplies the programmed charging current while the battery voltage increases towards 4.2V.

3. Constant-Voltage Stage

As the battery approaches its full charging voltage, the controller regulates the voltage while the charging current gradually decreases.

4. Charge Completion and Recharge

The controller manages charge termination and can restart charging when the battery voltage falls below its recharge threshold.

Input and Battery Connections

Connection Procedure

1. Identify the BAT+ and BAT- terminals on the module.
2. Connect a compatible single-cell lithium battery, observing the correct polarity.
3. Ensure that the selected charging current is within the battery’s rated charging limit.
4. Connect a suitable regulated 5V power supply through the USB Type-C port.
5. Monitor the charging status using the onboard indicators.
6. Disconnect the charging supply before modifying the battery connections.

IP2312 vs TP4056 Charging Modules

The IP2312 and TP4056 are both designed for single-cell lithium battery charging, but their charging architectures and current capabilities differ.

The IP2312 uses a synchronous switching converter and supports higher charging current, making it suitable for appropriately rated batteries.

The TP4056 is a linear charging controller commonly used for lower-current single-cell battery projects.

For applications requiring a lower 1A charging current with integrated battery protection, DIYGH also stocks the TP4056 1A Li-ion Charger Module with Protection.

Battery Protection and Safety

Important: The IP2312 module manages the battery charging process but does not include a complete battery protection circuit.

For applications requiring discharge protection, overcurrent protection and short-circuit protection, use a suitable battery protection board matched to the battery and charging current.

Additional precautions:

• Use only compatible single-cell 3.6V/3.7V lithium-ion or LiPo batteries.
• Do not use the module to charge 2S, 3S or 4S lithium battery packs.
• Do not use it for 3.2V LiFePO4 batteries.
• Ensure the battery is rated for the programmed charging current.
• Use a regulated 5V supply capable of supporting the required charging power.
• Never reverse the battery polarity.
• Avoid charging damaged, swollen or overheating batteries.
• Do not leave lithium battery charging unattended.
• Protect exposed PCB connections against accidental short circuits.
• Do not connect an external load to the battery terminals without considering its effect on charging termination and battery protection.

Package Includes

• 1 x IP2312 3A Type-C Lithium Battery Charger Module

Battery, USB cable and power adapter are not included.

Available from DIYGH Tech Hub, Apatrapa Junction, Kumasi, Ghana, for rechargeable battery projects, robotics, electronic equipment and STEM applications.