MCP73833-B6I/UN

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Power Management Integrated Circuit (PMIC) devices such as the MCP73833-B6I/UN are used in various applications. In particular, PMICs are often found in batteries and battery chargers, which help to ensure optimal performance and extended life of the battery and its associated electronics. The MCP73833-B6I/UN is a SMBus v1.1-compatible Li-Ion/Li-Polymer/LiFePO battery charge management controller for 4-cell Lithium-Ion(Li-Ion)/Lithium Polymer (Li-Poly) battery applications, and is designed to be interfaced with a microcontroller unit (MCU).

The MCP73833-B6I/UN has a high-accuracy voltage regulation loop, which precisely maintains the regulation voltage set point with 1.5% of accuracy. This helps in efficient charging, which maximizes the life of the battery. The MCP73833-B6I/UN makes use of an automatic state-change algorithm for smooth transitions between charge states. It also offers protection features for the battery, such as input voltage under-voltage lockout, reverse current protection, current sensing and thermal overload protection.

In order to work with the MCP73833-B6I/UN, a user needs to connect it to a microcontroller, some supporting circuitry, and the battery itself. The microcontroller can handle the communication between the MCP73833-B6I/UN and the rest of the system. The SMBus signals are used to configure the charge parameters such as charge current, charge voltage, termination current, and to determine the charging state. The supporting circuitry handles the proper sequencing of input power, charge enable, and system power.

The MCP73833-B6I/UN features a single-cell Li-Ion/Li-Poly pre-charge and float voltage of 4.2V. It also has an overvoltage protection of 4.3V, undervoltage lockout of 3.2V, and an adjustable charge current and termination current of up to 650mA and 150mA respectively. The charge timer and sleep timer can also be adjusted, so that the device can adapt to various battery requirements. The MCP73833-B6I/UN has an integrated internal switch for looping the charge current when it is set to 150 mA, which helps in avoiding external switches for charging.

The MCP73833-B6I/UN provides a low-battery discharge protection, and integrates power MOSFET drive as well as an internal switch. This prevents short-circuit current, by automatically sensing and kinking the power to the load. The MCP73833-B6I/UN can also be configured to allow input current limit via an external resistor, which manages the current level in order to prevent the overloading of the system. This can be very useful when the battery current is not known precisely. The MCP73833-B6I/UN also has an LED indicator, which turns on when the battery is in the charging state, and turns off when the battery is in the full charge state.

In summary, the MCP73833-B6I/UN is a suitable battery charger for 4-cell Li-Ion/Li-Poly batteries, which features various protection features and an accurate voltage regulation loop, as well as adjustable parameters. It can easily be incorporated into a battery charger design, by connecting it to a microcontroller, and the necessary supporting circuitry. The MCP73833-B6I/UN is a useful addition to any battery charger design, due to its flexibility and accuracy, and its ability to be configured to suit specific needs.

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