MCP73871T-2AAI/ML

Introduction

The MCP73871T-2AAI/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, essence, packaging/quantity, specifications, detailed pin configuration, functional features, advantages and disadvantages, working principles, detailed application field plans, and alternative models.

Basic Information Overview

• Category: Battery Charging IC
• Use: Designed for single-cell Li-Ion/Li-Polymer battery charging applications
• Characteristics: High accuracy, small footprint, and low-cost solution for portable devices
• Package: 8-pin MSOP (ML) package
• Essence: Efficient and reliable battery charging management
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage: 4.5V to 6.0V
• Charge Current: Programmable up to 1.0A
• Preconditioning Current: 10% of programmed current
• Termination Current: 5% of programmed current
• Charge Voltage: 4.20V with ±0.7% accuracy
• Charge Termination: C/10
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MCP73871T-2AAI/ML features the following pin configuration: 1. VSS (Ground) 2. PROG (Charge Current Programming) 3. STAT (Charge Status Output) 4. PG (Power Good Output) 5. CE (Charge Enable Input) 6. TS (Thermal Sense Input) 7. VDD (Input Supply Voltage) 8. VBAT (Battery Connection)

Functional Features

• Programmable Charge Current: Allows flexibility in setting the charge current based on battery requirements.
• Thermal Regulation: Integrated thermal regulation ensures safe operation under varying temperature conditions.
• Charge Status Output: Provides indication of the charging process for external monitoring.
• Power Good Output: Signals when input power is present and within the valid voltage range.
• Automatic Recharge: Initiates recharge if the battery voltage falls below a predefined threshold.

Advantages and Disadvantages

Advantages

• Compact and cost-effective solution for portable devices
• High accuracy in charge voltage and current regulation
• Flexible charge current programming
• Integrated thermal regulation for safe operation

Disadvantages

• Limited to single-cell Li-Ion/Li-Polymer battery charging applications
• Requires external components for complete battery charging system

Working Principles

The MCP73871T-2AAI/ML operates by regulating the charge current and voltage to the connected battery. Upon enabling the charge process, the IC monitors the battery voltage and adjusts the charge current accordingly. It also incorporates safety features such as thermal regulation and charge termination to ensure the battery is charged efficiently and safely.

Detailed Application Field Plans

The MCP73871T-2AAI/ML is well-suited for various portable electronic devices, including smartphones, tablets, portable media players, and handheld medical devices. Its compact size, high accuracy, and programmable features make it an ideal choice for applications requiring reliable battery charging management.

Detailed and Complete Alternative Models

• MCP73831: Similar functionality with reduced charge current capability
• MCP73837: Enhanced features with additional battery status indication
• MAX1555: Alternative IC with similar single-cell Li-Ion/Li-Polymer charging capabilities

In conclusion, the MCP73871T-2AAI/ML offers a comprehensive solution for single-cell Li-IIon/Li-Polymer battery charging applications, catering to the needs of portable electronic devices with its compact design, high accuracy, and programmable features.

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