MCP73831T-2ACI/OT

Product Overview

Category

The MCP73831T-2ACI/OT 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: 4.5V to 6.0V
• Charge current: Up to 500mA
• Programmable charge termination
• Automatic recharge
• Thermal regulation and protection
• Small package size
• Low external component count

Package

The MCP73831T-2ACI/OT is available in a 10-pin, thermally enhanced MSOP package.

Essence

The essence of this product lies in its ability to efficiently and safely charge Li-Ion or Li-Po batteries with minimal external components.

Packaging/Quantity

The MCP73831T-2ACI/OT is typically packaged in reels and comes in quantities of 3,000 units per reel.

Specifications

• Input Voltage Range: 4.5V to 6.0V
• Charge Current: Up to 500mA
• Preconditioning Current: 10% of programmed current
• Charge Termination Options: Constant voltage, constant current, or timer
• Battery Recharge Threshold: 3.9V
• Thermal Regulation Threshold: 125°C
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. VDD - Power supply input
2. STAT - Status output pin
3. PROG - Programming pin for setting charge current
4. TS - Thermistor input for thermal regulation
5. PGND - Power ground
6. BAT - Battery connection
7. CE - Charge enable input
8. DP - D+ USB data line
9. DM - D- USB data line
10. VSS - Ground

Functional Features

1. Programmable Charge Current: The PROG pin allows the user to set the charge current according to the battery's specifications.
2. Charge Termination Options: The MCP73831T-2ACI/OT offers multiple options for charge termination, including constant voltage, constant current, or timer-based termination.
3. Automatic Recharge: Once the battery voltage drops below a certain threshold, the charger automatically initiates the recharge process.
4. Thermal Regulation and Protection: The IC includes thermal regulation to prevent overheating during charging. It also provides protection against overcurrent and short-circuit conditions.
5. Small Package Size: The MSOP package ensures a compact form factor, making it suitable for space-constrained applications.
6. Low External Component Count: The MCP73831T-2ACI/OT requires minimal external components, simplifying the design and reducing costs.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows compatibility with various power sources.
• Programmable charge current enables flexibility for different battery capacities.
• Multiple charge termination options provide versatility for different charging scenarios.
• Automatic recharge feature ensures continuous battery availability.
• Thermal regulation and protection enhance safety and reliability.
• Compact package size facilitates integration into small devices.
• Low external component count reduces complexity and cost.

Disadvantages

• Limited maximum charge current of 500mA may not be suitable for high-capacity batteries.
• Lack of advanced features like battery temperature monitoring or communication interfaces.

Working Principles

The MCP73831T-2ACI/OT operates as a linear charge management controller. It regulates the charging process by controlling the charge current and monitoring the battery voltage. The charge current is programmable through the PROG pin, allowing customization based on the battery's requirements. The IC employs various charge termination methods, such as constant voltage, constant current, or timer-based termination, to ensure safe and efficient charging. Thermal regulation prevents excessive heat generation during the charging process, protecting both the battery and the charger.

Detailed Application Field Plans

The MCP73831T-2ACI/OT finds applications in various portable electronic devices that utilize single-cell Li-Ion or Li-Po batteries. Some common application fields include:

1. Mobile phones
2. Tablets
3. Portable media players
4. Bluetooth headsets
5. GPS devices
6. Wearable devices
7. Portable gaming consoles
8. Digital cameras
9. Power banks
10. IoT devices

Detailed and Complete Alternative Models

1. MCP73831-2ATI/OT: Similar to MCP73831T-2ACI/OT but available in a 10-pin TDFN package.
2. MCP73831T-2ATI/OT: Similar to MCP73831T-2ACI/OT but with a higher maximum charge current of 1A.
3. MCP73832