MCP73844T-840I/MS

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The MCP73844T-840I/MS is an example of a PMIC – Battery Chargers. Specifically, it is a highly efficient 1-Cell Li-ion/Li-Po battery charger integrated circuit. This highly integrated circuit, designed by Microchip Technology Inc., is a devicethat supports the various charging needs of the ever-evolving mobile and portable electronic products.

The MCP73844T-840I/MS battery charger provides flexibility through a combination of a thermistor-measurement and/or constant current/constant voltage charging algorithms. Its ability to provide both fast charging and gentle charging from a wide variety of sources is an invaluable tool for battery-powered product development.

The MCP73844T-840I/MS application field consists of a large range of rechargeable batteries and devices. The circuitry is ideal for cellular phones, digital cameras, PDAs, MP3 players, Navigational Units, Tablets, Cameras and other portable products with single cell Li-Ion/Li-Polymer battery packs.

The core of the MCP73844T-840I/MS is a highly efficient power management subsystem. This subsystem allows it to consume very little power while it is actively charging the battery. Additionally, the device provides up to 2.2A of charging current and features an embedded, programmable current limiter to protect both the battery and the charge source from over-current conditions.

The MCP73844T-840I/MS includes an onboard voltage regulator that can be used to supply a 3.2V or 3.3V output to the input of the battery. This allows the user to select the appropriate charge voltage for the specific chemistry of the battery. It also includes a programmable timer for determining the top-off time and a programmable status register for allowing the user to monitor the status of the charging cycle.

The MCP73844T-840I/MS working principle is based on the Constant Current/Constant Voltage (CC/CV) algorithm. This algorithm is designed to ensure that the battery is not overcharged while it is being charged. The output voltage is automatically maintained at the correct level while the current is held at the desired level. This method allows the charging process to be consistent and reliable by providing protection against overcharges.

The MCP73844T-840I/MS also employs a temperature compensation circuit to provide improved charge performance. The integrated circuit includes an on-board temperature sensor that measures the temperature at the battery. This temperature measurement is then used by the charge algorithm to adjust the charging voltage accordingly to ensure that the battery is not over-charged.

In addition to its advanced control features, the MCP73844T-840I/MS also provides several safety and protection features. It is designed to protect against over-temperature, over-current, over-voltage, and short-circuit conditions. In addition, the device provides multiple LED status indicators that are helpful in troubleshooting.

The MCP73844T-840I/MS is an ideal solution for a wide variety of battery-powered products. Its high efficiency, flexible charging algorithms, safety features, and ease of use make it a great choice for a wide range of applications.

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