MAX6428BGUR+T

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Power management integrated circuits play an important role in all electronic devices. They help manage system energy usage to enable efficient operation, reduce costs, and enable longer battery life. The MAX6428BGUR+T is an example of such a PMIC, specifically designed for battery management applications. This paper will give an overview of this IC, including its application fields and working principle. The MAX6428BGUR+T is a low-quiescent current linear battery charger designed for use with lead-acid and Ni-Cd battery systems in industrial and automotive applications. It is a low-voltage dropout (LDO) device that integrates two charge controller channels and one reverse current protection channel. It provides high-accuracy charging, resolving the need to discretely implement voltage and current monitoring, while having a low quiescent load draw. This results in minimized power consumption when the IC is idle, and its low-voltage operation enables the use of energy-saving low-voltage power sources. The MAX6428BGUR+T\'s A and B channels both feature a built-in charge control circuit that limits the power applied to a system during charging. To ensure proper charging parameters and keep the system stable, each channel requires one control source to program the charge current, and one to monitor the system voltage. The A and B channels also feature reverse current blocking diodes, which are used to shut down current flow out of the battery. The MAX6428BGUR+T also incorporates a low-quiescent current linear battery charger, designed for charge current applications in lead-acid and Ni-Cd battery systems. This charge current controller regulates the charge rate to a preset level, allowing for more consistent charging of the battery, and an improved battery capacity. The charge current is programmed via the charge current programming pin, which is then adjusted by the current sensor and feedback signal. As such, the MAX6428BGUR+T can maintains a sustained charge no matter the power supply and load conditions. In addition, the MAX6428BGUR+T also includes temperature and die temperature monitoring features, enabling safer operation and simpler over-temperature protection. The built-in thermal shutdown circuit helps protect the system from over-temperature conditions, while the temperature monitoring feature gives the system added protection against thermal runaway. All in all, the MAX6428BGUR+T is an ideal solution for cost-sensitive battery management applications. With its integrated charge controller, reverse current protection, and low-quiescent current linear battery charger, the MAX6428BGUR+T provides an efficient and cost-effective solution for charging lead-acid and Ni-Cd batteries. Its integrated temperature monitoring also enables safer operation and extended battery life, making the MAX6428BGUR+T a great choice for industrial and automotive battery management applications.

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