STEVAL-ISA181V1

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The STEVAL-ISA181V1 application field and working principle is a type of evaluation board, classified as DC/DC & AC/DC (Off-Line) SMPS. This evaluation board is designed for those who want to get a better understanding of the performance and efficiency of switched-mode power supplies (SMPS). It can be used to explore the dynamic limits of different power topologies for different applications. The board is based on a three-phase single-ended forward converter with active power factor correction (PFC), active load shedding, and programmable softstart. It offers design flexibility and allows users to optimize the performance of the SMPS to a given load.

The board is designed using the latest semiconductor technologies and components. It can be used to evaluate, measure, and optimize the efficiency of the power supply. To fully understand and appreciate the board, a user must gain a knowledge of the workings of the different components in the evaluation board. To that end, this document will explain the board’s components, the purpose of each component, and how these components work together to power the evaluation board.

The STEVAL-ISA181V1 board’s primary components include the switching regulator, the active PFC, and the active load shedding circuits. The switching regulator is the main component of the evaluation board, and it is responsible for controlling the power output to the load. The switching regulator consists of the primary side and the secondary side. The origin of the switching waves is the first stage (primary side), which is then sent to the secondary side, to be rectified and voltage regulated. The primary side also includes an active PFC circuit, which helps regulate the output power and increase efficiency. The second stage is the active load shedding circuit, which allows the switching regulator to reduce its power output when the load current increases due to higher demand.

The active PFC circuit is responsible for controlling the output voltage of the power supply, and it helps to adhere to the ‘Power Factor Correction’ standards. The active PFC works by regulating the output current of the converter and is controlled by an optocoupler. The active load shedding circuit prevents current overload and monitors the output current of the power supply, so that the voltage is not damaged in overcurrent conditions.

The STEVAL-ISA181V1 board also includes programmable soft-start, inrush current limiters, a voltage transformer and a voltage divider circuit. The voltage transformer is an optional feature that can be used instead of the voltage divider, and it can be used to boost the output voltage of the power supply. The inrush current limiters are used to reduce the surge current for the power supply, while the programmable soft-start allows the user to modify the load power-up time.

Overall, the STEVAL-ISA181V1 evaluation board provides a comprehensive tool for design engineers to test and refine the performance of a SMPS design. The components of the board enable the user to quickly assess a design’s efficiency, and also allow for precise control of the output power. This evaluation board allows users to understand and optimize the behaviour of a SMPS supply and therefore, make better design decisions.

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