MCP73842T-820I/UN

Product Overview

Category

The MCP73842T-820I/UN 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 MCP73842T-820I/UN is a highly integrated linear charge management controller.
• It provides a complete charging solution for single-cell Li-Ion or Li-Po batteries.
• This IC offers various safety features, such as thermal regulation, overvoltage protection, and reverse discharge protection.
• It supports multiple charging modes, including constant current (CC), constant voltage (CV), and trickle charge.
• The MCP73842T-820I/UN is designed to operate with an input voltage range of 4.5V to 6.0V.

Package

This product is available in a small 10-pin MSOP package.

Essence

The essence of the MCP73842T-820I/UN lies in its ability to efficiently and safely charge single-cell Li-Ion or Li-Po batteries.

Packaging/Quantity

The MCP73842T-820I/UN is typically sold in reels, with 250 units per reel.

Specifications

• Input Voltage Range: 4.5V to 6.0V
• Charging Current Range: Up to 1A
• Charge Termination Voltage: 4.2V ± 1%
• Preconditioning Current: 10% of programmed current
• Trickle Charge Current: 1/10 of programmed current
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. VDD: Power supply input
2. STAT1: Status output pin 1
3. STAT2: Status output pin 2
4. PROG: Programming pin for setting charging current
5. TS: Temperature sense input
6. VSS: Ground
7. PGND: Power ground
8. BAT: Battery connection
9. CE: Charge enable input
10. VDD: Power supply input

Functional Features

• Constant Current (CC) Mode: The MCP73842T-820I/UN charges the battery with a constant current until the programmed charge termination voltage is reached.
• Constant Voltage (CV) Mode: Once the charge termination voltage is reached, the IC switches to constant voltage mode to complete the charging process.
• Preconditioning: This feature allows the battery to be charged at a lower current before entering the main charging phase, which helps improve battery life.
• Trickle Charge: After the main charging phase, the MCP73842T-820I/UN provides a trickle charge to maintain the battery's full capacity.
• Safety Features: The IC incorporates various safety features like thermal regulation, overvoltage protection, and reverse discharge protection.

Advantages and Disadvantages

Advantages

• Highly integrated solution for Li-Ion/Li-Po battery charging.
• Supports multiple charging modes for optimal performance.
• Offers various safety features to protect the battery and the charging circuit.
• Small package size allows for space-efficient designs.
• Wide operating temperature range enables usage in various environments.

Disadvantages

• Limited to single-cell Li-Ion or Li-Po battery charging applications.
• Requires external components for complete charging circuit implementation.

Working Principles

The MCP73842T-820I/UN operates by regulating the charging current and voltage to ensure safe and efficient charging of single-cell Li-Ion or Li-Po batteries. It uses a combination of constant current and constant voltage charging modes to achieve this. The IC monitors the battery voltage and adjusts the charging current accordingly. Once the battery reaches the programmed charge termination voltage, the IC switches to constant voltage mode to complete the charging process.

Detailed Application Field Plans

The MCP73842T-820I/UN is widely used in portable electronic devices, such as smartphones, tablets, digital cameras, and portable gaming consoles. It is also utilized in various battery-powered applications, including wireless communication devices, medical devices, and handheld instruments.

Detailed and Complete Alternative Models

1. MCP73831T-2ACI/OT: Similar to MCP73842T-820I/UN but with a lower charging current capability.
2. MCP73871-2CCI/ML: Offers higher charging current capability and additional safety features.
3. MCP73861-2CCI/ML: Provides similar functionality to MCP73842T-820I/UN but with a different pin configuration.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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