Microchip Technology MCP73831T-3ACI/MC Single Cell Li-Ion Battery Charger

The MCP73831T-3ACI/MC is a highly integrated linear charge management controller from Microchip Technology, designed specifically for charging single-cell Lithium-Ion (Li-Ion) batteries. This compact and efficient device is ideal for portable applications, due to its small size and minimal component count. The MCP73831T-3ACI/MC integrates current regulation, voltage regulation, charge termination, and charge status indication, making it a comprehensive solution for battery management.

Key Features:

• Charge Regulation: The device implements a constant-current/constant-voltage charge algorithm with selectable pre-charge and charge termination. The constant voltage regulation is fixed at 4.2V, which is suitable for Li-Ion battery chemistries.
• Programmable Charge Current: Users can set the charge current from 15mA to 500mA by connecting an external resistor to the PROG pin, providing flexibility for different battery capacities and thermal management considerations.
• Automatic Power-Down: The MCP73831T-3ACI/MC automatically enters a low-power state when the charge cycle is complete, reducing power consumption.
• Charge Status Output: An on-board status output pin (STAT) allows for a simple LED interface to indicate the charge status, providing visual feedback to the user.
• Temperature Range: The device operates over an industrial temperature range of -40°C to +85°C, ensuring reliability in a wide range of environments.
• Thermal Regulation: To protect against overheating, the MCP73831T-3ACI/MC includes thermal regulation that reduces charge current during high internal temperature conditions.

Applications:

The MCP73831T-3ACI/MC is well-suited for a variety of applications where efficient charging of Li-Ion batteries is needed. This includes handheld devices, Bluetooth headsets, personal media players, digital cameras, and other USB-powered gadgets. Its small package and ease of use make it an excellent choice for portable power management designs.

Package and Availability:

The MCP73831T-3ACI/MC comes in a 5-pin SOT-23 package, which is ideal for space-constrained applications. This device is part of Microchip Technology's broad portfolio of power management solutions and is available for purchase from authorized distributors.