MAX5925AEUB+T

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The MAX5925AEUB+T is a hot-swap controller from the PMIC family that provides seamless circuit start-up and hot insertion protection for systems connecting to power supplies. It allows for up connection of systems in different power architectures that have different supply voltages and power supply sequencing . In addition, it integrates an adjustable regulator and undervoltage lockout (UVLO) feature to aid in implementing soft loading or power sequencing as needed. This article will discuss the application fields and working principles of the MAX5925AEUB+T hot-swap controller.

Applications

The MAX5925AEUB+T is often used in distributed power architecture (DPA) systems. A typical DPA system consists of multiple cells that serve as independent power supplies, each with the ability to operate within a defined threshold. The MAX5925AEUB+T can be used to control the on/off state of each cell, thereby allowing for system-level power supply sequencing - a critical part of many power systems today. In addition, the MAX5925AEUB+T can be used to ensure system health and uninterrupted operation, even when power supply voltages are changing, which is often the case in DPA systems. The MAX5925AEUB+T can be configured to allow for insertion or removal of a system from power without interruption of service, protecting components from damage and ensuring smooth operation in a wide range of temperatures. It can also protect systems from overvoltage, overtemperature, and short circuit conditions.

The MAX5925AEUB+T is also used in where AC/DC power supplies often require higher input capacitance, such as in server systems. The MAX5925AEUB+T features an adjustable regulator, which can be tuned for different supply voltages, and an internal undervoltage lockout (UVLO) for soft loading of power supplies with different sequencing. This makes it an ideal choice for AC/DC power systems such as servers, where the ability to easily adjust supply voltages and sequencing is crucial.

Working Principle

The MAX5925AEUB+T uses a number of underlying technologies to perform its operations. It contains two independent power switches - a control and a hot-swap switch - which regulate the connection and disconnection of power. The hot-swap switch opens to ensure low inrush current, high voltage, and low power loss when connecting a system to the power supply. The control switch is used to control system power delivery, and it can be configured to be on or off. The hot-swap switch is triggered by the MAX5925AEUB+T’s UVLO circuit, which monitors the input voltage and adjusts system power accordingly. The UVLO circuit also features an adjustable voltage trigger point, allowing it to protect the system from overvoltage and undervoltage conditions while still providing soft loading of power supplies.

The MAX5925AEUB+T also contains a voltage trimming circuit, which allows for easy adjustment of the output voltage from different inputs. The trimming circuit is designed to achieve smooth, precise control of power sequencing, allowing for seamless integration of systems with varying power supply requirements. In addition, it features an overcurrent protection circuit which shuts the system down in the event of a short circuit or other overload condition.

Conclusion

The MAX5925AEUB+T hot-swap controller from the PMIC family provides seamless circuit start-up and hot insertion protection for systems connecting to power supplies. It can be used in distributed power architecture (DPA) systems, AC/DC power systems such as servers, and many other power supply applications. Its features include two independent power switches, an adjustable regulator, and an adjustable undervoltage lockout (UVLO) feature, all of which help to ensure smooth, precise control of power sequencing. In addition, its overcurrent protection circuit helps to protect systems from overvoltage, overtemperature, and short circuit conditions.

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