MCP73871-2CAI/ML

Introduction

The MCP73871-2CAI/ML is a specialized integrated circuit (IC) designed for battery charging applications. This entry provides an overview of the product, including its category, use, characteristics, package, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

• Category: Battery Charging IC
• Use: The MCP73871-2CAI/ML is used for managing and controlling the charging of single-cell lithium-ion or lithium-polymer batteries.
• Characteristics: It features constant current and constant voltage charging, thermal regulation, charge status indicators, and safety features to prevent overcharging and overheating.
• Package: The MCP73871-2CAI/ML is available in a small 8-pin MSOP package, making it suitable for compact designs.
• Essence: The essence of this IC lies in its ability to provide efficient and safe charging for lithium-ion and lithium-polymer batteries in various electronic devices.
• Packaging/Quantity: The MCP73871-2CAI/ML is typically supplied in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Input Voltage: 4.5V to 6.0V
• Charge Current: Programmable up to 1A
• Termination Current: 1/10th of the programmed charge current
• Preconditioning: Trickle charge with automatic recharge
• Thermal Regulation: Automatic reduction of charge current at high temperatures
• Charge Status Indicators: Power good and charge complete outputs
• Safety Features: Under-voltage lockout, thermal shutdown, and reverse discharge protection

Detailed Pin Configuration

The MCP73871-2CAI/ML features the following pin configuration: 1. VSS (Ground) 2. PROG (Charge Current Programming) 3. STAT (Charge Status Indicator) 4. PG (Power Good Indicator) 5. CE (Charge Enable) 6. TS (Thermal Sense) 7. VBAT (Battery Connection) 8. VDD (Input Voltage)

Functional Features

• Constant Current/Constant Voltage Charging: The IC regulates the charging process to ensure a consistent and controlled flow of current and voltage to the battery.
• Thermal Regulation: It automatically adjusts the charge current to prevent overheating, ensuring safe and efficient charging.
• Safety Features: The MCP73871-2CAI/ML incorporates multiple safety mechanisms to protect the battery from overcharging, reverse discharge, and excessive temperatures.
• Charge Status Indicators: It provides clear indications of the charging status through power good and charge complete outputs.

Advantages and Disadvantages

Advantages

• Efficient and safe charging for lithium-ion and lithium-polymer batteries
• Compact MSOP package for space-constrained designs
• Programmable charge current for flexibility
• Integrated safety features for reliable battery protection

Disadvantages

• Limited to single-cell battery charging applications
• Requires external components for full functionality

Working Principles

The MCP73871-2CAI/ML operates by regulating the charge current and voltage to the connected lithium-ion or lithium-polymer battery. It continuously monitors the battery's temperature and charge status to ensure safe and optimal charging. The IC also provides charge status indicators to communicate the progress of the charging process.

Detailed Application Field Plans

The MCP73871-2CAI/ML is widely used in various portable electronic devices, such as smartphones, tablets, digital cameras, and portable media players. Additionally, it finds applications in battery-powered IoT devices, handheld medical devices, and portable instrumentation equipment.

Detailed and Complete Alternative Models

• MCP73831: A similar IC with lower charge current capability
• MCP73837: Offers additional features such as programmable charge termination and timer-based charging
• BQ24075: An alternative IC from Texas Instruments with comparable functionality

In conclusion, the MCP73871-2CAI/ML is a versatile and reliable battery charging IC that caters to the specific requirements of lithium-ion and lithium-polymer battery charging applications. Its compact design, advanced features, and safety mechanisms make it a preferred choice for a wide range of portable electronic devices and battery-powered systems.

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