MCP73871T-2CAI/ML

Product Overview

Category

The MCP73871T-2CAI/ML belongs to the category of battery charger ICs.

Use

This product is primarily used for charging single-cell lithium-ion (Li-Ion), lithium-polymer (Li-Po), and lithium iron phosphate (LiFePO4) batteries.

Characteristics

• The MCP73871T-2CAI/ML is a highly integrated, linear charge management controller.
• It provides a complete charging solution for various lithium-based battery chemistries.
• This IC offers a wide range of programmable features, making it suitable for a variety of applications.
• It supports constant current (CC) and constant voltage (CV) charging modes.
• The MCP73871T-2CAI/ML includes safety features such as thermal regulation, charge termination, and reverse battery protection.

Package and Quantity

The MCP73871T-2CAI/ML is available in a small 10-pin DFN package. It is supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 3.75V to 6V
• Charge Current Range: Up to 1.5A
• Programmable Charge Termination Current: 1/10th, 1/20th, or 1/40th of the programmed charge current
• Programmable Charge Termination Timer: 8 hours, 16 hours, or 32 hours
• Preconditioning Mode: Programmable current limit for initial battery charging
• Temperature Regulation: Programmable thermal regulation for safe operation
• Reverse Battery Protection: Prevents damage due to reverse battery insertion
• Status Outputs: Charge status indication through two open-drain outputs

Detailed Pin Configuration

The MCP73871T-2CAI/ML has the following pin configuration:

1. VBAT: Battery voltage input
2. PROG: Programming pin for setting charge current and termination current
3. STAT1: Open-drain status output 1
4. STAT2: Open-drain status output 2
5. PGND: Power ground
6. THERM: Thermal regulation input
7. TS: Temperature sense input
8. VSSOP: Ground
9. VDD: Supply voltage input
10. VOUT: Regulated output voltage

Functional Features

1. Programmable Charge Current: The MCP73871T-2CAI/ML allows users to set the desired charge current based on battery requirements.
2. Charge Termination Control: It provides programmable options for terminating the charging process, ensuring safe and optimal battery charging.
3. Thermal Regulation: The IC incorporates thermal regulation to prevent overheating during charging, enhancing safety and reliability.
4. Reverse Battery Protection: This feature safeguards the charger and battery from potential damage caused by reverse battery insertion.
5. Status Outputs: The open-drain status outputs provide visual indication of the charging process, enabling easy monitoring.

Advantages and Disadvantages

Advantages

• Highly integrated solution for lithium-based battery charging.
• Wide range of programmable features for flexibility in various applications.
• Safety features such as thermal regulation and reverse battery protection enhance reliability.
• Small package size and tape and reel packaging facilitate ease of use in manufacturing processes.

Disadvantages

• Limited to single-cell battery charging, not suitable for multi-cell configurations.
• Requires external components for complete charging circuit implementation.

Working Principles

The MCP73871T-2CAI/ML operates as a linear charge management controller. It regulates the charging process by controlling the charge current and voltage applied to the battery. The IC uses a combination of constant current and constant voltage charging modes to ensure efficient and safe charging.

Upon connection to a power source, the MCP73871T-2CAI/ML initiates the charging process by applying a constant current to the battery. As the battery voltage increases, it reaches a predetermined threshold, at which point the charger switches to constant voltage mode. In this mode, the IC maintains a steady voltage while reducing the charge current until the termination conditions are met.

The programmable features of the MCP73871T-2CAI/ML allow users to customize the charging parameters according to the specific requirements of the battery being charged.

Detailed Application Field Plans

The MCP73871T-2CAI/ML is widely used in various portable electronic devices that require single-cell lithium-based battery charging. Some common application fields include:

1. Mobile Phones: The IC is utilized in mobile phone chargers to efficiently charge the Li-Ion or Li-Po batteries used in smartphones.
2. Tablets and Laptops: It finds application in charging circuits for tablets and laptops, ensuring safe and optimized charging of their lithium-based batteries.
3. Portable Media Players: The MCP