FS-VM

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DC/DC or AC/DC (Offline) SMPS evaluations boards, commonly known as FS-VM evaluation boards, are an efficient way to analyze, review and tweak the design of a switch mode power supply. They are efficient at providing an accurate and reliable power supply to both the consumer and the environment and can provide stability and quality to any modern system.

A major advantage of using these evaluation boards lies in its central feature, the I²C interface. Being able to control multiple outputs of the board from a single bus can greatly reduce design complexity. In addition, the board can be monitored and controlled over the I²C bus making it an integral part of any system. The device also makes use of a Voltage Mode (VM) regulator for solving complex input conditions while still maintaining a high efficiency of the power conversion process.

The FS-VM evaluation boards are basically composed of three parts; input, output and a control part. The first two, the input and the output, are determined by the power supply scheme being evaluated. The input part can use different sources like a battery, triangular current generator or an AC transformer, whereas the output could be either a variable voltage load or a synthesized AC voltage and current. The control part includes the I²C bus, some control logic, power supply monitoring and testing facilities.

The operation of an FS-VM evaluation board is based on the system\'s transfer function. It operates in two modes: Continuous Mode and Discontinuous Mode. The former is used when supplied by a battery or a current generator whereas the latter is employed when connected to an AC supply. In either scenario, the board has the capability of detecting line current and line voltage variation while operating in both modes thus increasing its stability and reliability.

In Continuous Mode, the evaluation board has to continuously adjust the output voltage in order to maintain a constant system power. This is done by monitoring the system input voltage and line current. It also has to keep track of the maximum allowed output voltage as well as the minimum allowed output current. It is also responsible for detecting power peaks and dips while operating and taking corrective action accordingly.

In Discontinuous Mode, the board has to maintain a constant output voltage which is dependent on the system’s input voltage in addition to the shunt-regulator’s voltage. The board monitors both the input voltage and the line current while maintaining a constant system power. It also has to detect peaks and dips while operating and take corrective action accordingly in order to maintain a high stability level at all times.

The FS-VM evaluation board is designed to accurately monitor and control the power conversion process of a switch mode power supply. With its central feature, the I²C interface, it can monitor and control multiple outputs as well as offering a voltage mode (VM) regulator to solve complex input conditions while still providing an efficient operation. The evaluation board operates in either Continuous or Discontinuous Mode depending on the system’s input source and monitors both the input voltage and line current in order to maintain a reliable power conversion process while providing stability and quality to any modern system.

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