MCP73831T-2ATI/MC

Product Overview

Category

The MCP73831T-2ATI/MC 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 MCP73831T-2ATI/MC is a highly integrated linear charge management controller.
• It provides a complete charging solution for single-cell Li-Ion or Li-Po batteries.
• This product offers various safety features, such as thermal regulation and overcharge protection.
• It supports a wide range of input sources, including USB ports and AC adapters.
• The MCP73831T-2ATI/MC is designed to be compact and efficient, making it suitable for portable devices.

Package

The MCP73831T-2ATI/MC is available in a small 10-pin Thin Shrink Small Outline Package (TSOT-23-10).

Essence

The essence of the MCP73831T-2ATI/MC lies in its ability to provide reliable and efficient charging for single-cell Li-Ion or Li-Po batteries in a compact form factor.

Packaging/Quantity

This product is typically sold in reels or tubes, with a quantity of 3000 units per reel or tube.

Specifications

• Input Voltage Range: 4.5V to 6.0V
• Charge Current Range: 15mA to 500mA
• Preconditioning Current: 10% of programmed current
• Charge Termination Options: Constant Voltage, Timer, or C/10
• Temperature Regulation: ±1°C accuracy
• Battery Recharge Threshold: 3.9V
• Battery Discharge Threshold: 2.9V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MCP73831T-2ATI/MC 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/AC - Input Source Selection Pin
7. CE - Charge Enable Input
8. DP/DM - USB Data Pins
9. AC/TS - Input Source Selection Pin
10. VDD - Supply Voltage Input

Functional Features

• Constant-Current/Constant-Voltage (CC/CV) Charging Algorithm
• Programmable Charge Current
• Automatic Recharge
• Thermal Regulation for Safety
• Charge Status Indication
• USB and AC Adapter Input Support
• Reverse Discharge Protection
• Under-Voltage Lockout (UVLO)
• Over-Temperature Protection (OTP)

Advantages and Disadvantages

Advantages

• Highly integrated solution for Li-Ion/Li-Po battery charging.
• Compact form factor suitable for portable devices.
• Wide input voltage range allows flexibility in power sources.
• Multiple charge termination options for different applications.
• Comprehensive safety features ensure reliable charging.

Disadvantages

• Limited to single-cell battery charging.
• Not suitable for high-current charging applications.
• Requires external components for complete charging circuitry.

Working Principles

The MCP73831T-2ATI/MC utilizes a CC/CV charging algorithm to charge Li-Ion or Li-Po batteries. It starts with a constant current phase, where the charge current is set based on the programming resistor connected to the PROG pin. Once the battery voltage reaches the programmed threshold, it transitions to the constant voltage phase, where the charger maintains a fixed voltage across the battery terminals.

During the charging process, the MCP73831T-2ATI/MC continuously monitors the battery temperature through the THERM pin. If the temperature exceeds a certain threshold, thermal regulation is activated to reduce the charge current and prevent overheating.

The charger also provides various safety features, such as reverse discharge protection, UVLO, and OTP, to ensure safe and reliable charging.

Detailed Application Field Plans

The MCP73831T-2ATI/MC is widely used in various portable electronic devices, including:

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

Detailed and Complete Alternative Models

1. MCP73831-2ATI/MC: Similar to MCP73831T-2ATI/MC but without the thermal regulation feature.
2. MCP73831T-2ACI/MC: Same as MCP73831T-2ATI/MC but with an alternative package (SOT-23-10).

These alternative models provide similar functionality and can be considered as