MCP73871T-4CAI/ML

Product Overview

Category

The MCP73871T-4CAI/ML belongs to the category of battery charger ICs.

Use

This product is primarily used for charging single-cell lithium-ion (Li-Ion), lithium-polymer (Li-Po), and lithium iron phosphate (LiFePO4) batteries.

Characteristics

• The MCP73871T-4CAI/ML is a highly integrated, linear charge management controller.
• It offers a complete charging solution for portable devices with limited space and power constraints.
• This IC provides various safety features such as thermal regulation, charge termination, and overvoltage protection.
• It supports USB input voltage range from 4.35V to 6V and can deliver up to 1A of charge current.
• The MCP73871T-4CAI/ML operates at a high efficiency, reducing power dissipation and maximizing battery life.

Package and Quantity

The MCP73871T-4CAI/ML is available in a small 10-pin DFN package. It is supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 4.35V to 6V
• Charge Current: Up to 1A
• Operating Temperature Range: -40°C to +85°C
• Charging Accuracy: ±0.5%
• Battery Regulation Voltage: 4.2V
• Thermal Regulation: Yes
• Overvoltage Protection: Yes
• Under Voltage Lockout: Yes
• Reverse Discharge Protection: Yes

Pin Configuration

The MCP73871T-4CAI/ML has the following pin configuration:

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

Functional Features

1. Integrated charge management controller for single-cell Li-Ion, Li-Po, and LiFePO4 batteries.
2. Automatic detection of USB port attachment and battery insertion.
3. Programmable charge current through the PROG pin.
4. Safety features like thermal regulation, charge termination, and overvoltage protection.
5. Power good output (PG) indicates the presence of a valid input voltage.
6. Status output (STAT) provides charging status information.
7. Reverse discharge protection prevents battery drain when the input power is removed.

Advantages and Disadvantages

Advantages

• Highly integrated solution for compact devices with limited space.
• Supports multiple lithium-ion battery chemistries.
• Efficient charging algorithm maximizes battery life.
• Provides various safety features for reliable charging.
• Automatic detection simplifies the charging process.

Disadvantages

• Limited to single-cell battery charging only.
• Requires an external resistor for charge current programming.
• Not suitable for high-power applications.

Working Principles

The MCP73871T-4CAI/ML operates by monitoring the battery voltage, input voltage, and temperature to ensure safe and efficient charging. It uses a constant current/constant voltage (CC/CV) charging algorithm to charge the battery. The charge current can be programmed using an external resistor connected to the PROG pin. The IC terminates the charging process when the battery voltage reaches the preset regulation voltage. It also incorporates thermal regulation to prevent overheating during charging.

Application Field Plans

The MCP73871T-4CAI/ML is widely used in various portable electronic devices, including:

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

Alternative Models

If the MCP73871T-4CAI/ML does not meet specific requirements, alternative models with similar functionality include:

1. BQ24075RGTR - Texas Instruments
2. MAX1555EZK+T - Maxim Integrated
3. LTC4054LES5-4.2#TRMPBF - Analog Devices
4. NCP1851BMTXG - ON Semiconductor
5. ISL9238EVAL1Z - Renesas Electronics

These alternative models offer comparable features and can be considered as substitutes for the MCP73871T-4CAI/ML.

In conclusion, the MCP73871T-4CAI/ML is a highly integrated battery charger IC designed for single-cell lithium-ion batteries. It offers efficient charging, safety features, and compact size, making it suitable for a wide range of portable electronic devices.