MCP73833T-BZI/UN

Introduction

The MCP73833T-BZI/UN is a specialized integrated circuit (IC) designed for battery charging applications. This article provides an overview of the product, including its basic information, 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 MCP73833T-BZI/UN is used for charging single-cell lithium-ion or lithium-polymer batteries in various portable devices such as smartphones, tablets, and portable electronic gadgets.
• Characteristics: It features a compact design, high efficiency, and built-in safety features to ensure reliable and safe battery charging.
• Package: The MCP73833T-BZI/UN is available in a small 8-pin TDFN package, making it suitable for space-constrained applications.
• Essence: The essence of this IC lies in its ability to provide a controlled and efficient charging solution for lithium-ion and lithium-polymer batteries.
• Packaging/Quantity: The MCP73833T-BZI/UN is typically supplied in reels with a quantity specified by the manufacturer.

Specifications

• Input Voltage Range: 4.5V to 6.0V
• Charge Current: Up to 1A
• Programmable Preconditioning Current: Up to 20% of the programmed fast charge current
• Termination Current: 10% of the programmed fast charge current
• Ambient Temperature Range: -40°C to 85°C
• Battery Recharge Threshold: 3.9V
• Battery Regulation Voltage: 4.2V

Detailed Pin Configuration

The MCP73833T-BZI/UN features the following pin configuration: 1. VSS (Ground) 2. PROG (Charge Current Programming Pin) 3. STAT (Status Output Pin) 4. CE (Charge Enable Input Pin) 5. TS (Thermal Sense Input Pin) 6. VBAT (Battery Voltage Sense Input Pin) 7. VDD (Input Supply Voltage) 8. VSS (Ground)

Functional Features

• Charge Status Indicator: The STAT pin provides an indication of the charging status, allowing for easy monitoring of the charging process.
• Thermal Regulation: The TS pin enables thermal regulation, ensuring safe operation under varying temperature conditions.
• Programmable Charge Current: The PROG pin allows for the programming of the charge current, providing flexibility in charging different battery capacities.

Advantages and Disadvantages

Advantages

• Compact Size: The small form factor makes it suitable for space-constrained designs.
• High Efficiency: Ensures efficient use of power during the charging process.
• Safety Features: Built-in protection mechanisms enhance the safety of the charging process.

Disadvantages

• Limited to Single-Cell Batteries: The MCP73833T-BZI/UN is designed specifically for single-cell lithium-ion or lithium-polymer batteries, limiting its applicability to multi-cell configurations.

Working Principles

The MCP73833T-BZI/UN operates based on a constant current/constant voltage charging algorithm. When a battery is connected and the charge enable input is activated, the IC delivers a constant current to the battery until the battery voltage reaches the regulation voltage. It then switches to constant voltage mode, delivering a decreasing current to maintain the regulation voltage. Once the charge termination current is reached, the charging process stops.

Detailed Application Field Plans

The MCP73833T-BZI/UN finds extensive application in various portable electronic devices, including but not limited to: - Smartphones - Tablets - Portable media players - Handheld gaming devices - Portable medical devices

Detailed and Complete Alternative Models

• MCP73831: Similar functionality with a different pin configuration
• MCP73837: Higher charge current capability for faster charging
• BQ24075: Texas Instruments alternative with comparable features

In conclusion, the MCP73833T-BZI/UN serves as a reliable and efficient solution for charging single-cell lithium-ion or lithium-polymer batteries in portable electronic devices. Its compact size, high efficiency, and safety features make it a preferred choice for designers seeking a dependable battery charging IC.

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