MCP73831T-2ACI/MC

Overview

Product Category

The MCP73831T-2ACI/MC 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

• The MCP73831T-2ACI/MC is a highly integrated linear charge management controller.
• It provides a complete charging solution for portable devices with limited space and power constraints.
• This IC offers various safety features, such as thermal regulation, over-voltage protection, and under-voltage lockout.
• It supports constant current/constant voltage (CC/CV) charging profiles, ensuring efficient and safe charging of Li-Ion/Li-Po batteries.

Package and Quantity

The MCP73831T-2ACI/MC is available in a small 10-pin MSOP package. It is typically sold in reels of 3,000 units.

Specifications

• Input Voltage Range: 4.5V to 6.0V
• Charge Current Range: 15mA to 500mA
• Preconditioning Current: 10% of the programmed fast charge current
• Charge Termination Options: Timer, C/10, and Minimum Current
• Battery Regulation Voltage: 4.20V ±1%
• Temperature Regulation: 100°C (typical)
• Reverse Discharge Current: 1µA (maximum)

Pin Configuration

The MCP73831T-2ACI/MC has the following pin configuration:

1. VBAT - Battery Voltage Input
2. PROG - Charge Current Programming Pin
3. STAT - Status Output Pin
4. PGND - Power Ground
5. THERM - Thermal Regulation Input
6. TS - Temperature Sense Input
7. VDD - Supply Voltage Input
8. CE - Charge Enable Input
9. DP - D+ USB Data Line
10. DM - D- USB Data Line

Functional Features

1. Constant Current/Constant Voltage (CC/CV) Charging: The MCP73831T-2ACI/MC supports the CC/CV charging profile, ensuring optimal and safe charging of Li-Ion/Li-Po batteries.
2. Thermal Regulation: This IC incorporates thermal regulation to prevent overheating during charging, enhancing safety and battery life.
3. Over-Voltage Protection (OVP): It provides protection against overcharging by monitoring the battery voltage and terminating the charging process when the voltage exceeds a predefined threshold.
4. Under-Voltage Lockout (UVLO): The MCP73831T-2ACI/MC prevents charging if the input voltage falls below a certain level, protecting the charger and the battery.

Advantages and Disadvantages

Advantages

• Highly integrated solution for compact devices with limited space.
• Supports various safety features for reliable and safe charging.
• Flexible charge termination options for different application requirements.
• Wide input voltage range allows compatibility with different power sources.

Disadvantages

• Limited maximum charge current compared to some other charger ICs.
• Requires an external resistor for programming the charge current.

Working Principles

The MCP73831T-2ACI/MC operates based on the CC/CV charging algorithm. Initially, it charges the battery with a constant current until the battery voltage reaches the programmed regulation voltage. Then, it switches to constant voltage mode, maintaining the battery voltage at the regulation level while reducing the charge current gradually. This approach ensures efficient and safe charging, preventing overcharging and damage to the battery.

Application Field Plans

The MCP73831T-2ACI/MC is widely used in various portable electronic devices that require single-cell Li-Ion/Li-Po battery charging. Some common application fields include:

1. Smartphones and tablets
2. Portable media players
3. Bluetooth headsets
4. Wearable devices
5. GPS navigation systems
6. Portable gaming consoles

Alternative Models

Here are some alternative models that offer similar functionality to the MCP73831T-2ACI/MC:

1. LTC4054 - Linear Technology
2. BQ24075 - Texas Instruments
3. MAX1555 - Maxim Integrated
4. MCP73833 - Microchip Technology
5. TP4056 - NanJing Top Power

These alternatives can be considered based on specific application requirements, availability, and cost considerations.

In conclusion, the MCP73831T-2ACI/MC is a highly integrated linear charge management controller designed for charging single-cell Li-Ion/Li-Po batteries. It offers various safety features, supports CC/CV charging profiles, and is widely used in portable electronic devices. While it has some limitations, it provides an efficient and reliable charging solution for applications with space and power constraints.