The MCP73827-4.2VUA is a highly integrated lithium-ion/polymer battery charge management controller from Microchip Technology, designed to provide reliable charging for single-cell Li-Ion or Li-Polymer batteries. This miniature charge management solution is ideal for portable applications where space and weight are at a premium.

Key Features

• Charge Regulation: The device offers constant current/constant voltage operation with thermal regulation to maximize charge rate without risk of overheating.
• Voltage Regulation: It provides a precise output voltage of 4.2V, which is critical for the longevity and safe charging of lithium batteries.
• Charge Status Output: An onboard status output pin allows for easy indication of the charging cycle progress through an external LED or other signaling mechanism.
• Programmable Charge Current: The charge current can be set from 15mA to 500mA using an external resistor, providing flexibility to accommodate different battery capacities and charging speeds.
• Automatic Power-Down: The MCP73827-4.2VUA automatically enters a low-power mode when the charging cycle is complete, conserving energy and extending battery life.
• Protection Features: Comprehensive safety features include pre-conditioning of deeply discharged batteries, automatic termination, and a safety timer for a controlled charging cycle.

Applications

The compact size and comprehensive feature set of the MCP73827-4.2VUA make it an excellent choice for a wide array of applications, such as:

• Portable medical devices
• Bluetooth headsets and wearable technology
• Smart battery packs
• Handheld consumer electronics
• Backup battery chargers

Product Specifications

Overall, the MCP73827-4.2VUA from Microchip Technology stands out as a compact, efficient, and versatile charging solution for single-cell Li-Ion and Li-Polymer batteries, ensuring safe and reliable battery management in a variety of portable devices.