MCP73834T-FCI/MF

Product Overview

Category

The MCP73834T-FCI/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-FCI/MF is a highly integrated solution for portable devices.
• It offers a compact size and low external component count, making it suitable for space-constrained applications.
• This battery charger IC provides a complete charging solution with features like constant current pre-conditioning, constant voltage charging, and charge termination.

Package

The MCP73834T-FCI/MF is available in a 10-pin DFN (Dual Flat No-Lead) package.

Essence

The essence of this product lies in its ability to efficiently and safely charge lithium-ion batteries, ensuring optimal performance and longevity.

Packaging/Quantity

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

Specifications

• Input Voltage: 4.5V to 6.0V
• Charge Current: Up to 1A
• Programmable Charge Termination Current: 1/10th of the programmed fast charge current
• Preconditioning Current: 10% of the programmed fast charge current
• Charge Voltage: Programmable up to 4.2V
• Battery Temperature Monitoring
• Thermal Regulation and Protection
• Under-Voltage Lockout (UVLO)
• Reverse Discharge Protection
• Status Indication Outputs

Detailed Pin Configuration

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

1. VBAT - Battery Voltage Input
2. STAT - Status Indication Output
3. PROG - Charge Current Programming Input
4. TS - Battery Temperature Sense Input
5. PGND - Power Ground
6. VSS - System Ground
7. CE - Charge Enable Input
8. VDD - Supply Voltage Input
9. VOUT - Regulated Output Voltage
10. ISET - Current Set Resistor Connection

Functional Features

• Constant Current Pre-Conditioning: The MCP73834T-FCI/MF provides a pre-conditioning current to prepare the battery for fast charging, ensuring optimal charging efficiency.
• Constant Voltage Charging: Once the battery voltage reaches the programmed charge voltage, the charger switches to constant voltage mode to prevent overcharging.
• Charge Termination: The charger terminates the charging process when the charge current drops below a programmable threshold, preventing overcharging and potential damage to the battery.
• Battery Temperature Monitoring: The MCP73834T-FCI/MF includes a temperature sense input to monitor the battery temperature during charging, allowing for thermal regulation and protection.
• Reverse Discharge Protection: This feature prevents the battery from discharging back into the charger when the input power is removed.

Advantages and Disadvantages

Advantages

• Compact size and low external component count
• Efficient and safe charging of lithium-ion batteries
• Programmable charge termination current and voltage
• Battery temperature monitoring for thermal regulation and protection
• Reverse discharge protection

Disadvantages

• Limited to single-cell lithium-ion battery charging
• Requires careful programming of charge current and voltage for optimal performance

Working Principles

The MCP73834T-FCI/MF operates by regulating the charging current and voltage applied to the connected lithium-ion battery. It starts with a constant current pre-conditioning phase, gradually increasing the charging current until the battery voltage reaches the programmed charge voltage. At this point, the charger switches to constant voltage mode, maintaining a steady voltage while reducing the charging current. The charge termination occurs when the charge current drops below a programmable threshold, indicating that the battery is fully charged.

Detailed Application Field Plans

The MCP73834T-FCI/MF finds applications in various portable devices, including: - Smartphones - Tablets - Portable media players - Bluetooth headsets - Wearable devices - GPS trackers - Portable gaming consoles

Detailed and Complete Alternative Models

1. MCP73831T-2ACI/OT: Similar to MCP73834T-FCI/MF but with a different pin configuration.
2. MCP73871-2CCI/ML: Offers higher charge current capability and additional features like USB On-The-Go (OTG) support.
3. MCP73861-2CCI/ML: Provides similar functionality but with a smaller package size.

These alternative models offer similar charging capabilities and features, providing flexibility for different design requirements.

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