Microchip Technology's MCP73828 Single-Cell Li-Ion/Li-Polymer Charge Management Controller

The MCP73828 is a highly integrated linear charge management controller designed by Microchip Technology, tailored for single-cell, Lithium-Ion (Li-Ion) or Lithium-Polymer (Li-Poly) battery applications. This miniature and efficient device is an ideal solution for space-constrained and portable applications, providing a simple yet reliable charging solution.

With its advanced features, the MCP73828 offers a complete charge management system that ensures safe and efficient charging of your battery. It operates with an input voltage range from 4.5V to 6.0V, making it versatile for various USB and AC adapter power sources. The device provides a fixed charge voltage of 4.2V with tight regulation to ensure the battery is charged correctly and to maximize its lifespan.

The MCP73828 incorporates a range of safety features to protect the battery during the charging process. These include automatic recharge, preconditioning of deeply depleted cells, and a charge termination timer. Additionally, the controller includes thermal regulation to optimize the charge rate under diverse environmental conditions.

One of the key advantages of the MCP73828 is its programmable charge current, which can be set from 15mA to 500mA using an external resistor. This flexibility allows designers to tailor the charging current to the specific needs of their application. The device also features a status output that indicates the charge cycle's progress, which can be used to drive an external LED or interface with a host microcontroller for more advanced battery monitoring.

Microchip's MCP73828 is available in a compact 8-pin MSOP package, which minimizes the footprint on your PCB. Its simplicity, combined with Microchip's reputation for quality and reliability, makes the MCP73828 an excellent choice for portable electronics, including digital cameras, Bluetooth headsets, and personal media players. By integrating this charge management controller into your design, you can ensure a safe, efficient, and user-friendly charging experience for your customers.