MCP73827-4.2VUATR

Product Overview

Category

The MCP73827-4.2VUATR 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
• Charging current: Up to 1A
• Programmable charge termination current
• Preconditioning of deeply discharged cells
• Automatic recharge
• Thermal regulation and protection
• Under-voltage lockout
• Charge status indication

Package

The MCP73827-4.2VUATR is available in a small, surface-mount SOT-23 package.

Essence

The essence of this product lies in its ability to efficiently and safely charge Li-Ion or Li-Po batteries with various features and protections.

Packaging/Quantity

The MCP73827-4.2VUATR is typically packaged in reels containing 3000 units per reel.

Specifications

• Input Voltage Range: 3.75V to 6V
• Charging Current: Up to 1A
• Charge Termination Current: Programmable
• Preconditioning Threshold: 100mV
• Automatic Recharge Threshold: 3.9V
• Thermal Regulation Threshold: 85°C
• Under-Voltage Lockout Threshold: 2.4V
• Charge Status Indication: LED or open-drain output

Detailed Pin Configuration

The MCP73827-4.2VUATR has the following pin configuration:

1. VBAT - Battery Voltage Input
2. PROG - Charge Termination Current Programming Pin
3. STAT - Charge Status Indicator Output
4. GND - Ground
5. VDD - Supply Voltage Input

Functional Features

1. Programmable Charge Termination Current: The PROG pin allows the user to set the charge termination current according to their battery requirements.
2. Preconditioning of Deeply Discharged Cells: The MCP73827-4.2VUATR includes a preconditioning feature that enables safe charging of deeply discharged batteries.
3. Automatic Recharge: After a charge cycle is completed, if the battery voltage drops below the recharge threshold, the MCP73827-4.2VUATR automatically initiates a new charge cycle.
4. Thermal Regulation and Protection: The IC incorporates thermal regulation to prevent overheating during charging. It also provides protection against over-temperature conditions.
5. Under-Voltage Lockout: The under-voltage lockout feature ensures that the charger does not operate when the input voltage falls below a certain threshold.
6. Charge Status Indication: The STAT pin can be used to indicate the charging status through an LED or as an open-drain output.

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 ensures safe charging of deeply discharged cells.
• Automatic recharge functionality maintains battery health.
• Thermal regulation and protection prevent overheating and damage.
• Under-voltage lockout protects against insufficient input voltage.
• Charge status indication facilitates monitoring of the charging process.

Disadvantages

• Limited to single-cell Li-Ion or Li-Po battery charging applications.
• SOT-23 package may require surface-mount soldering expertise.

Working Principles

The MCP73827-4.2VUATR operates by regulating the charging current and voltage to the connected Li-Ion or Li-Po battery. It monitors the battery voltage, temperature, and charging current to ensure safe and efficient charging. The charge termination current can be programmed using the PROG pin, allowing customization for different battery capacities. The IC also incorporates various protection features to prevent overcharging, overheating, and under-voltage conditions.

Detailed Application Field Plans

The MCP73827-4.2VUATR is widely used in portable electronic devices such as smartphones, tablets, digital cameras, and portable gaming consoles. It is also utilized in power banks, wireless headphones, and other battery-powered consumer electronics. Additionally, this IC finds applications in industrial devices, medical equipment, and automotive systems that require reliable and efficient battery charging.

Detailed and Complete Alternative Models

1. MCP73831-2ACI/OT: Similar functionality with a lower charging current of up to 500mA.
2. MCP73871-2CCI/ML: Higher charging current capability of up to 2A.
3. MCP73833-AMI/OT: Supports dual-cell Li-Ion or Li-Po battery charging.

These alternative models offer similar features and functionalities but may have different specifications and