MCP73871-2CCI/ML

Product Overview

Category

The MCP73871-2CCI/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 MCP73871-2CCI/ML is a highly integrated linear charge management controller.
• It offers a complete charging solution for portable devices.
• This IC provides multiple safety features, such as thermal regulation, overvoltage protection, and reverse discharge protection.

Package

The MCP73871-2CCI/ML is available in a small 20-pin QFN package.

Essence

The essence of this product lies in its ability to efficiently and safely charge lithium-ion batteries while providing necessary protection mechanisms.

Packaging/Quantity

The MCP73871-2CCI/ML is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage: 4.5V to 6.0V
• Charge Voltage: Programmable from 3.5V to 4.4V
• Maximum Charge Current: 1A
• Preconditioning Current: 10% of the programmed maximum charge current
• Charge Termination: Programmable timer or voltage-based termination
• Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MCP73871-2CCI/ML has a total of 20 pins. Here is the detailed pin configuration:

1. VBAT - Battery Voltage Input
2. STAT1 - Status Output 1
3. STAT2 - Status Output 2
4. PGND - Power Ground
5. PROG - Programming Input
6. TS - Temperature Sense Input
7. VSS - Ground
8. VDD - Supply Voltage Input
9. CE - Charge Enable Input
10. ISET - Current Set Input
11. STAT3 - Status Output 3
12. STAT4 - Status Output 4
13. STAT5 - Status Output 5
14. STAT6 - Status Output 6
15. STAT7 - Status Output 7
16. STAT8 - Status Output 8
17. STAT9 - Status Output 9
18. STAT10 - Status Output 10
19. STAT11 - Status Output 11
20. STAT12 - Status Output 12

Functional Features

• Integrated pass transistor and current sense for simplified design.
• Programmable charge termination options for flexible charging profiles.
• Automatic recharge feature to maintain battery capacity.
• Thermal regulation prevents overheating during charging.
• Reverse discharge protection prevents battery drain.

Advantages and Disadvantages

Advantages

• Highly integrated solution reduces external component count.
• Multiple safety features ensure safe and reliable charging.
• Programmable charge termination allows customization.
• Automatic recharge feature prolongs battery life.

Disadvantages

• Linear charging method may result in lower efficiency compared to switching chargers.
• Limited maximum charge current of 1A may not be suitable for high-power applications.

Working Principles

The MCP73871-2CCI/ML operates by regulating the charging current and voltage supplied to the connected lithium-ion battery. It uses a linear charging method, where the excess voltage is dissipated as heat. The IC continuously monitors the battery temperature and adjusts the charging parameters accordingly to prevent overheating. The charge termination can be based on either a programmable timer or a voltage threshold, ensuring that the battery is not overcharged.

Detailed Application Field Plans

The MCP73871-2CCI/ML is widely used in various portable electronic devices, including but not limited to: - Smartphones and tablets - Portable media players - Bluetooth headsets - GPS navigation systems - Portable gaming consoles

Detailed and Complete Alternative Models

1. MCP73831-2ATI/OT: Similar functionality with a lower maximum charge current of 500mA.
2. MCP73861-2CCI/ML: Higher maximum charge current of 1.5A for faster charging.
3. MCP73844-420I/UN: Supports dual-cell battery charging with a maximum charge voltage of 8.4V.

These alternative models offer different specifications and features to cater to specific application requirements.

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