MCP73833T-CNI/UN

Product Overview

• Category: Battery Charger IC
• Use: Charging lithium-ion (Li-Ion) batteries
• Characteristics:
  • Small form factor
  • High charging efficiency
  • Integrated safety features
  • Flexible input voltage range
• Package: 10-pin DFN (Dual Flat No-Lead)
• Essence: Efficient and compact battery charger IC
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 6.0V
• Charge Voltage Range: 3.75V to 4.2V
• Maximum Charge Current: 1A
• Preconditioning Current: 10% of the programmed maximum charge current
• Charge Termination Options: Constant Voltage, Timer, or C/10
• Temperature Monitoring: Internal temperature sensor
• Safety Features: Thermal regulation, charge termination timer, reverse battery protection, and battery temperature monitoring

Pin Configuration

The MCP73833T-CNI/UN has a total of 10 pins. The pin configuration is as follows:

1. VBAT - Battery voltage input
2. PROG - Programming pin for setting the maximum charge current
3. STAT - Status output pin indicating the charging status
4. PGND - Power ground
5. THERM - Battery temperature sense input
6. TS - Thermal shutdown output
7. CE - Charge enable input
8. VSS - Ground
9. VDD - Supply voltage input
10. VOUT - Regulated output voltage

Functional Features

• Integrated constant-current/constant-voltage charging algorithm
• Automatic charge termination based on selected method
• Programmable maximum charge current
• Reverse battery protection
• Thermal regulation to prevent overheating
• Battery temperature monitoring for enhanced safety
• Charge enable pin for easy control

Advantages and Disadvantages

Advantages: - Small form factor allows for compact designs - High charging efficiency reduces energy waste - Integrated safety features protect the battery and prevent accidents - Flexible input voltage range accommodates various power sources

Disadvantages: - Maximum charge current limited to 1A, may not be suitable for high-capacity batteries - Limited charge termination options compared to some other models

Working Principles

The MCP73833T-CNI/UN operates on a constant-current/constant-voltage charging algorithm. It starts by delivering a constant current to the battery until the programmed maximum charge current is reached. Once the battery voltage reaches the desired level, the charger switches to a constant voltage mode to maintain the battery at that voltage. The charge termination method can be selected as constant voltage, timer-based, or C/10 (current divided by 10). Safety features such as thermal regulation, reverse battery protection, and battery temperature monitoring ensure safe and efficient charging.

Detailed Application Field Plans

The MCP73833T-CNI/UN is widely used in portable electronic devices, such as smartphones, tablets, digital cameras, and portable gaming consoles. It is also suitable for applications where space is limited and efficient charging is required, such as wearable devices, wireless earphones, and IoT devices. The integrated safety features make it an ideal choice for applications where battery safety is crucial.

Detailed and Complete Alternative Models

1. MCP73831T-CI/OT: Similar to MCP73833T-CNI/UN but with a lower maximum charge current of 500mA.
2. MCP73837T-CI/OT: Similar to MCP73833T-CNI/UN but with a higher maximum charge current of 1.5A.
3. MCP73871T-CI/OT: Advanced battery charger IC with additional features like USB On-The-Go (OTG) support and programmable thermal regulation.

These alternative models provide options with different charge current capabilities and additional features to suit specific application requirements.

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