MCP73838T-FCI/UN

Product Overview

Category

The MCP73838T-FCI/UN 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 MCP73838T-FCI/UN is a highly integrated solution for battery charging applications.
• It offers a compact size and low external component count, making it suitable for space-constrained designs.
• This IC provides a complete charging solution with features like constant current and constant voltage charging modes.
• It supports various safety features such as thermal regulation, charge termination, and reverse battery protection.

Package

The MCP73838T-FCI/UN is available in a small footprint 10-pin DFN package.

Essence

The essence of this product lies in its ability to efficiently and safely charge lithium-ion batteries, ensuring optimal performance and longevity.

Packaging/Quantity

The MCP73838T-FCI/UN is typically sold in reels or tubes, with a quantity of 2500 units per reel.

Specifications

• Input Voltage: 4.5V to 6.0V
• Charging Current: Up to 1A
• Charge Termination Current: 1/10th of the programmed fast charge current
• Preconditioning Current: 1/10th of the programmed fast charge current
• Temperature Range: -40°C to +85°C

Detailed Pin Configuration

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

Functional Features

• Constant Current (CC) and Constant Voltage (CV) charging modes
• Programmable fast charge current through the PROG pin
• Thermal regulation to prevent overheating during charging
• Automatic recharge feature to maintain battery capacity
• Reverse battery protection to prevent damage from reverse polarity connection
• Charge status indication through the STAT pin

Advantages and Disadvantages

Advantages

• Compact size and low external component count
• Supports multiple lithium-ion battery chemistries
• Integrated safety features for reliable charging
• Wide temperature range for versatile applications

Disadvantages

• Limited maximum charging current of 1A
• Requires external thermistor for accurate temperature monitoring

Working Principles

The MCP73838T-FCI/UN operates by providing a constant current to the connected battery until a predefined voltage is reached. It then switches to a constant voltage mode to complete the charging process. The IC continuously monitors the battery temperature and adjusts the charging current accordingly to prevent overheating.

Detailed Application Field Plans

The MCP73838T-FCI/UN is widely used in portable electronic devices such as smartphones, tablets, digital cameras, and portable gaming consoles. It is also employed in power banks, wireless headphones, and other battery-powered consumer electronics.

Detailed and Complete Alternative Models

• MCP73831T-2ACI/OT: Similar functionality with a lower charging current capability.
• MCP73871-2CCI/ML: Higher charging current capability with additional safety features.
• MCP73844-420I/MS: Supports higher input voltage range and offers programmable charge termination current.

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