MCP73838-NVI/UN

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Power Management Integrated Circuits (PMICs) are integrated circuits (ICs) comprising of several blocks, such as voltage regulator, control, boost, and low drop-out (LDO) regulators used to provide power management to electronic devices. Battery chargers are one particular type of PMIC that are specialized for managing and controlling the charging rate of a steady state charge of a battery. The MCP73838-NVI/UN is a microcontroller-integrated battery charger that can be used in a wide range of applications. This article will discuss the application field, and the internal working principle, of the MCP73838-NVI/UN.

Application Field

The MCP73838-NVI/UN is a power management chip designed for a wide variety of applications, such as mobile phone and laptop batteries, as well as other portable devices. With its high-efficiency design, it can be used as a main charger, or in a back-up charging system, to provide superior charging performance. The MCP73838-NVI/UN has a maximum input voltage of 10V, which makes it suitable for battery chemistries that require high charging voltages, such as Li-Ion, Li-Po, and Li-Phosphate. Additionally, the MCP73838-NVI/UN includes an adjustable SYSTEM voltage monitor, which allows it to be used in different battery chemistries without requiring any additional components or external logic.

The MCP73838-NVI/UN also has a highly programmable charging circuit with a 4-pin configuration, allowing it to be quickly adapted to changing application requirements. The charging circuit supports both constant current/constant voltage (CC/CV) charging, as well as pre-charge and termination current settings. The integrated microcontroller can be programmed to allow the MCP73838-NVI/UN to detect the type of battery it is connected to, and to adjust the charging parameters accordingly. This ensures the fastest and safest charging process and delivers an optimized battery charging cycle.

Working Principle

The MCP73838-NVI/UN is a microcontroller-integrated battery charger that can be used in a wide range of applications. The microcontroller combines advanced algorithm algorithms with a low-dropout (LDO) Linear Regulator to deliver a highly efficient system with advanced safety features and a fast charging rate. The MCP73838-NVI/UN uses a 4-phase charging algorithm to accurately and safely charge a battery and protect it from overcharging or overheating.

Phase 1 is an input voltage regulator, which regulates the input voltage from 9V to 10V to provide consistent charging voltage for the battery. Phase 2 is the pre-charge phase, where the battery is slowly charged with a low current to minimize stress on the battery. Phase 3 is the constant current phase, where the MCP73838-NVI/UN uses a constant current to charge the battery as quickly and safely as possible. Finally, phase 4 is the constant voltage phase, where the voltage is held constant while the current is gradually decreased to complete the charging cycle.

The MCP73838-NVI/UN also incorporates a system voltage monitor, which can be used to detect the battery’s voltage level and ensure that the battery is not overcharged. This feature adds additional safety to the battery, ensuring that the battery is not damaged due to overcharging or overdischarging. Additionally, the voltage monitor can also be used to detect when the battery is at a low voltage level and when the charging cycle should be terminated.

Conclusion

The MCP73838-NVI/UN is a microcontroller-integrated battery charger that is suitable for a wide variety of applications. The high efficiency design and adjustable 4-pin configuration make it an ideal choice for applications where fast charging, safety, and precision are essential. The integrated System Voltage Monitor ensures that the battery is not overcharged, while the 4-phase charging algorithm minimizes stress on the battery and minimizes unnecessary charging time.

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