MCP73834T-NVI/MF

Product Overview

Category

The MCP73834T-NVI/MF 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 MCP73834T-NVI/MF is a highly integrated solution that provides complete charge management for single-cell Li-Ion/Li-Po/LiFePO4 batteries.
• It offers a constant current/constant voltage (CC/CV) charge algorithm, ensuring efficient and safe charging.
• The device supports various charging currents, making it suitable for a wide range of battery capacities.
• It incorporates multiple safety features such as thermal regulation, overvoltage protection, and reverse discharge protection.
• The MCP73834T-NVI/MF operates from a wide input voltage range, enabling it to be used with different power sources.
• It is available in a small form factor package, making it suitable for space-constrained applications.

Package and Quantity

The MCP73834T-NVI/MF is available in a 10-pin DFN (Dual Flat No-Lead) package. It is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 3.75V to 6V
• Charging Current Range: 15mA to 500mA
• Charge Termination Voltage: 4.2V (Li-Ion/Li-Po), 3.6V (LiFePO4)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MCP73834T-NVI/MF has the following pin configuration:

1. VBAT: Battery Voltage Input
2. PROG: Charge Current Programming Pin
3. STAT: Charging Status Output
4. PG: Power Good Output
5. TS: Thermal Shutdown Input
6. EN: Enable Input
7. GND: Ground
8. VSS: Negative Supply Voltage
9. VDD: Positive Supply Voltage
10. VOUT: Regulated Output Voltage

Functional Features

• Constant current/constant voltage (CC/CV) charging algorithm
• Programmable charge current through the PROG pin
• Automatic recharge feature for battery maintenance
• Thermal regulation to prevent overheating
• Overvoltage protection and reverse discharge protection
• Power good output for system status indication
• Charging status output for monitoring the charging process

Advantages and Disadvantages

Advantages

• Highly integrated solution, reducing external component count
• Wide input voltage range allows compatibility with various power sources
• Multiple safety features ensure safe and reliable charging
• Small form factor package suitable for space-constrained applications

Disadvantages

• Limited to single-cell Li-Ion/Li-Po/LiFePO4 battery charging
• Not suitable for multi-cell battery packs

Working Principles

The MCP73834T-NVI/MF operates based on a CC/CV charging algorithm. Initially, it provides a constant current to the battery until the charge termination voltage is reached. Then, it switches to a constant voltage mode, maintaining the charge termination voltage while reducing the charging current. This ensures that the battery is charged efficiently and safely.

The device continuously monitors the battery temperature and adjusts the charging current accordingly to prevent overheating. It also incorporates safety features such as overvoltage protection and reverse discharge protection to safeguard the battery and the charging circuit.

Application Field Plans

The MCP73834T-NVI/MF is widely used in portable electronic devices, including smartphones, tablets, digital cameras, and portable medical devices. It is also suitable for applications where single-cell Li-Ion/Li-Po/LiFePO4 batteries need to be charged efficiently and safely.

Alternative Models

• MCP73831T-NVI/MF
• MCP73832T-NVI/MF
• MCP73833T-NVI/MF
• MCP73835T-NVI/MF

These alternative models offer similar functionality but may have different specifications or package options.

In conclusion, the MCP73834T-NVI/MF is a highly integrated battery charger IC designed for single-cell Li-Ion/Li-Po/LiFePO4 batteries. With its efficient charging algorithm, safety features, and small form factor package, it is widely used in various portable electronic devices.