MCP73213-A61I/MF

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MCP73213-A61I/MF is a battery charge management integrated circuit (IC). This device is a multi-function controller that supports operation modes for Li-Ion/Li-Polymer Secondary Cells with standalone operation. It is designed primarily for Li-Ion/Li-Polymer battery pack applications and is suitable for both 1-cell and 2-cell configurations.

By virtue of its adjustable charging and current level regulation capability, the MCP73213-A61I/MF is classified as a PMIC specifically for battery chargers. It operates in multiple modes to help ensure safe and reliable charging of battery packs, while also supporting the capability for an advanced self-protection system against over-current conditions during charging mode operation.

Working Principle

The MCP73213-A61I/MF battery charger system consists of a P-channel MOSFET (PMFET) switch and an integrated, programmable switch mode step-down converter with battery precision current regulation. A regulated constant voltage, regulated current, and regulated temperature (TEMP) charging protocol is embedded in the PMIC to monitor and control the charging cycles and process. The MCP73213-A61I/MF operates with a single Li-Ion/Li-Polymer cell battery, and also supports 2-cell independent and series configurations.

When the VC pin voltage of the MCP73213-A61I/MF exceeds the battery voltage level, the PMFET switch is turned on and current is supplied to the external capacitor. This capacitor is connected in series to the battery, which will act as a charge regulator, limiting the current according to the binary logic of the internal detection and regulation duty cycle. This happens until the TEMP shutdown level is reached, at which time the PMFET switch is turned off, preventing further charging despite the VC pin exceeding the battery level.

The MCP73213-A61I/MF also provides fixed frequency current detect regulation. This allows the internal step-down switching frequency to remain constant for precise current regulation, thereby optimizing the charging process. The device also cuts off excess voltage levels when the battery voltage is close to the system output voltage, preventing overcharge. And it will also disconnect the battery if a temperature of greater than the predetermined range is detected.

Application Fields

The MCP73213-A61I/MF PMIC is ideal for various Li-Ion/Li-Polymer rechargeable battery packs and is suitable for a wide range of applications such as portable telephone, mobile computing, PDAs and handheld gaming systems. It is also applicable for use in MP3 players, digital cameras, smart wrist watches and other personal electronics, as well as automotive and lighting systems.

The MCP73213-A61I/MF can be used as a standalone charging system. Its support for an advanced pre-programmable self-protection system and customizable charging settings make it an ideal solution for safe and reliable Li-Ion/Li-Polymer battery charging management. The multi-level PREGND threshold scheme allows for precision current regulation, allowing for optimal charging performance.

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