MAX14650EZA+T

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As technology evolves and progresses, engineers and technicians rely on components designed to fulfil increasingly versatile or specific tasks. Power management integrated circuits (PMICs) form part of the vast array of components that make up the modern electronic systems which endlessly abound today. These components are indispensable for the proper functioning of many electronic circuits. One such component is the Maxim Integrated Max14650EZA+T, an automatic lithium-ion/polymer battery charger and temporary-battery backup with integrated power-failure detection. Its versatile yet simple operation is a powerful tool in the hands of any designer, providing crucial support to many designs.

The Max14650EZA+T combines in its small package several features functions and guarantees; among them we find a low quiescent current of only 5μA, automatic trickle charging, 110mA charging current, 100mA backup current, programmable charge voltage and charge current, power-fail detect function and short-circuit protection. These features, when combined, make up versatile and reliable power tool which can be integrated in several applications.

As a product of the Power Management ICs (PMICs) family, the Max14650EZA+T belongs to the subcategory of Battery Management components. Battery management was always a critical issue in the industry, as many applications rely on a reliable and steady current to ensure the prolonged life of power-hungry components such as rechargeable batteries used in laptop computers and mobile gadgets. As such, the purpose of the Max14650EZA+T is to guarantee a reliable charging process of the integrated lithium-ion/polymer batteries present in the majority of electronic devices and gadgets, achieving a very low stand-by power consumption rate.

The Max14650EZA+T is designed to detect power failures, allowing the user to configure several parameters including the charge voltage and current, the battery enable current and the backup current. In addition, the component features a safe short-circuit protection circuit which ensures that even if a short circuit happens, the component will remain functional and will not lead to further damage.

When put to work, the Max14650EZA+T works on a two-phase process, during the first phase the primary lithium battery (Li-ion/Li-Poly) is charged with a constant current of up to 110mA, and a constant voltage of 4.2V. The point at which the current is reduced to a trickle is determined by the user and can go as low as 40mA, depending on the type and capacity of the battery. During this phase, the battery will slowly increase its capacity as extra power is being stored in the lithium-ion cells.

On the second stage, the battery is monitored and the system is ready to detect the power failure and act on it. The power failure detect mode is configured according to the user needs and can detect a power failure as low as to 0.8V. As long as the supply voltage falls below the power-fail detection level, the Max14650EZA+T will switch to the battery enable mode and begin to provide a constant current of up to 100mA to the system, allowing a quick switch to the Li-ion/Li-Poly battery.

When the main power supply is restored, the Max14650EZA+T will switch back to the charging mode automatically and continue to monitor the battery to ensure a steady and reliable charge until the battery is completely full. The switching between the charging and enable modes is seamlessly done and allows the user to benefit from an efficient and reliable power supply.

Fields of application for the Max14650EZA+T are vast, as this PMIC can supply crucial power to many fields, including but not limited to portable computers, laptops, LCDs, intelligent lighting and similar systems. In addition to this, the backup current can also be used during low peak times and even in conjunction with solar panel output, to help maintain a steady and reliable system performance.

Finally, the Max14650EZA+T proves to be an invaluable resource for many designs, allowing a reliable and uninterrupted power supply for a variety of components and creating a reliable charging system for the integrated batteries in an efficient and reliable package. As such, this comprehensive charging solution offers many advantages when compared to other power solutions, such as ultra-low power consumption, high accuracy charging, programmable current and voltage settings, as well as an automatic power failure detection function.

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