MCP73834T-CNI/MF

Product Overview

Category

The MCP73834T-CNI/MF 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 MCP73834T-CNI/MF is a highly integrated solution for battery charging applications.
• It offers a compact and efficient charging solution with minimal external components.
• This IC provides various safety features, such as thermal regulation, overvoltage protection, and charge termination.

Package

The MCP73834T-CNI/MF is available in a small 10-pin DFN package.

Essence

The essence of this product lies in its ability to provide a reliable and efficient charging solution for Li-Ion and Li-Po batteries.

Packaging/Quantity

The MCP73834T-CNI/MF is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 6.0V
• Charge Current Range: Up to 1A
• Preconditioning Current: 10% of the programmed current limit
• Charge Termination Options: C/10 or C/20
• Battery Recharge Threshold: 3.9V
• Thermal Regulation: Yes
• Overvoltage Protection: Yes
• Under Voltage Lockout: Yes
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MCP73834T-CNI/MF 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. VSSOP: Negative supply voltage
8. CE: Charge enable input
9. VDD: Positive supply voltage
10. VSS: Ground

Functional Features

• Constant current/constant voltage charging algorithm
• Programmable charge current
• Automatic recharge
• Charge status indication
• Thermal regulation for safe operation
• Overvoltage protection
• Under voltage lockout

Advantages and Disadvantages

Advantages

• Highly integrated solution, requiring minimal external components
• Compact package size
• Efficient charging algorithm
• Multiple safety features for battery protection

Disadvantages

• Limited to single-cell Li-Ion or Li-Po batteries
• Input voltage range is restricted to 4.5V to 6.0V

Working Principles

The MCP73834T-CNI/MF operates on a constant current/constant voltage charging algorithm. It starts by delivering a constant current to the battery until the programmed charge current limit is reached. Once the battery voltage reaches the programmed recharge threshold, the charger enters a constant voltage mode. During this phase, the charger maintains a constant voltage across the battery terminals while reducing the charge current. The charging process terminates when the charge current drops to a predetermined fraction of the programmed current limit.

Detailed Application Field Plans

The MCP73834T-CNI/MF is widely used in various portable electronic devices, including smartphones, tablets, digital cameras, and portable media players. It is also suitable for applications such as wireless headsets, GPS devices, and handheld gaming consoles.

Detailed and Complete Alternative Models

• MCP73831T-2ACI/MC
• MCP73832T-2ACI/MC
• MCP73833T-2ACI/MC
• MCP73837T-2ACI/MC

These alternative models offer similar functionality and features, providing flexibility in choosing the most suitable battery charger IC for specific applications.

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