MCP73827-4.1VUA

Product Overview

Category

The MCP73827-4.1VUA belongs to the category of battery charger ICs.

Use

This product is primarily used for charging single-cell lithium-ion (Li-Ion) or lithium-polymer (Li-Po) batteries.

Characteristics

• Input voltage range: 3.75V to 6V
• Charge current: Up to 1A
• Programmable charge termination current
• Preconditioning of deeply discharged cells
• Automatic recharge
• Thermal regulation and protection
• Under-voltage lockout (UVLO)
• Small package size

Package

The MCP73827-4.1VUA is available in a small SOT-23-5 package.

Essence

The essence of this product lies in its ability to efficiently and safely charge single-cell Li-Ion or Li-Po batteries with programmable charge termination and thermal regulation features.

Packaging/Quantity

The MCP73827-4.1VUA is typically sold in reels, with 3000 units per reel.

Specifications

• Input Voltage Range: 3.75V to 6V
• Charge Current: Up to 1A
• Programmable Charge Termination Current: 0.5x, 1x, 2x, or 4x
• Preconditioning Threshold: 2.9V
• Automatic Recharge Threshold: 2.8V
• Thermal Regulation Threshold: 100°C
• Under-Voltage Lockout (UVLO): 2.4V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MCP73827-4.1VUA has the following pin configuration:

1. VBAT: Battery voltage input
2. PROG: Charge termination current programming pin
3. STAT: Charge status output pin
4. GND: Ground
5. VDD: Supply voltage input

Functional Features

1. Programmable Charge Termination Current: The PROG pin allows the user to select the charge termination current, providing flexibility based on battery requirements.
2. Preconditioning of Deeply Discharged Cells: The MCP73827-4.1VUA includes a preconditioning feature that allows safe charging of deeply discharged batteries.
3. Automatic Recharge: This IC automatically initiates recharge when the battery voltage drops below a certain threshold, ensuring continuous operation.
4. Thermal Regulation and Protection: The device incorporates thermal regulation to prevent overheating during charging. It also provides protection against over-temperature conditions.
5. Under-Voltage Lockout (UVLO): The UVLO feature ensures that the charger does not operate when the input voltage falls below a specified threshold.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows compatibility with various power sources.
• Programmable charge termination current offers flexibility for different battery types.
• Preconditioning feature enables safe charging of deeply discharged cells.
• Automatic recharge ensures uninterrupted operation.
• Thermal regulation protects against overheating.
• Small package size facilitates space-constrained designs.

Disadvantages

• Limited to single-cell Li-Ion or Li-Po battery charging applications.
• Not suitable for multi-cell battery systems.

Working Principles

The MCP73827-4.1VUA operates as a constant-current/constant-voltage charger. It starts by supplying a constant current to the battery until the programmed charge termination current is reached. At this point, the charger switches to a constant voltage mode, maintaining a steady voltage across the battery terminals. Once the charge current drops below a predefined threshold, the charger terminates the charging process.

Detailed Application Field Plans

The MCP73827-4.1VUA is commonly used in various portable electronic devices, such as smartphones, tablets, digital cameras, and portable gaming consoles. It finds applications in battery-powered IoT devices, wearable technology, and other portable consumer electronics.

Detailed and Complete Alternative Models

Some alternative models to the MCP73827-4.1VUA include:

1. MCP73831: Similar functionality with a lower charge current capability.
2. MCP73833: Higher charge current capability with additional features like power good output and thermal regulation.

These alternative models provide options for different charging requirements and system designs.

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