MCP73834-B6I/UN

Product Overview

• Category: Battery Charger IC
• Use: Charging lithium-ion (Li-Ion) batteries
• Characteristics: High accuracy, small package size, low power consumption
• Package: SOT-23-5
• Essence: Integrated linear charge management controller
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 4.5V to 6.0V
• Charge Voltage: 4.2V
• Precharge Current: 10% of programmed fast charge current
• Fast Charge Current: Programmable up to 1.0A
• Charge Termination: C/10 detection, minimum timer, and maximum timer
• Battery Temperature Monitoring: Yes
• Thermal Regulation: Yes
• Reverse Discharge Protection: Yes
• Under Voltage Lockout: Yes
• Status Output: Yes

Detailed Pin Configuration

The MCP73834-B6I/UN has a total of five pins:

1. VBAT: Battery voltage input pin
2. PROG: Programming pin for setting the fast charge current
3. STAT: Status output pin indicating charging status
4. GND: Ground pin
5. VDD: Power supply input pin

Functional Features

• Integrated linear charge management controller
• Constant current/constant voltage charging algorithm
• Programmable fast charge current
• Automatic recharge
• Charge termination based on multiple methods
• Thermal regulation for temperature protection
• Reverse discharge protection
• Under voltage lockout for battery safety
• Status output for charging indication

Advantages and Disadvantages

Advantages: - High accuracy in charging Li-Ion batteries - Small package size allows for space-saving designs - Low power consumption for energy efficiency - Multiple charge termination methods ensure safe charging - Thermal regulation protects the battery from overheating - Reverse discharge protection prevents battery damage

Disadvantages: - Limited to charging Li-Ion batteries only - Requires external components for complete charging circuit implementation

Working Principles

The MCP73834-B6I/UN is a linear charge management controller designed for charging Li-Ion batteries. It follows a constant current/constant voltage charging algorithm to ensure accurate and efficient charging. The fast charge current can be programmed according to the battery's requirements using the PROG pin. The charge termination is based on multiple methods, including C/10 detection, minimum timer, and maximum timer. The IC also incorporates thermal regulation to prevent overheating of the battery during charging. Additionally, it provides reverse discharge protection and under voltage lockout for battery safety.

Detailed Application Field Plans

The MCP73834-B6I/UN is widely used in various portable electronic devices that utilize Li-Ion batteries. Some common application fields include:

1. Smartphones and tablets
2. Portable media players
3. Bluetooth headsets
4. Digital cameras
5. Portable gaming devices
6. GPS navigation systems
7. Wearable devices

Detailed and Complete Alternative Models

1. MCP73831: Similar functionality with a lower charge current capability.
2. MCP73833: Similar functionality with a higher charge current capability.
3. MCP73837: Similar functionality with additional features like USB compatibility.

These alternative models provide similar functionality to the MCP73834-B6I/UN but may have different specifications or package options to suit specific design requirements.

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