ISL6721EVAL1

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The ISL6721EVAL1 from Intersil is an evaluation board designed to facilitate the evaluation and understanding of the features and functions of the ISL6721 synchronous buck controller in off-line DC/DC and AC/DC switch-mode power supply (SMPS) applications. The board employs a flyback topology that offers high output currents and power densities with ease of component selection.

The ISL6721 synchronous buck controller is highly integrated, enabling high efficiency across the widest range of output currents and voltages. Its integrated power switches are optimized for switching at high frequencies and are capable of up to 2A output current. The IC also features wide range power-good output with propagation delay, soft-start and programmable fault timeout features to protect the system further. This allows the board to be useful for a wide variety of applications.

The ISL6721EVAL1 can be supplied with either a 5V or 12V input voltage which provides DC output of 3.3V, 1.8V, 1.2V, and 0.8V. With a single resistor, it is possible to adjust the output voltage from 0.7V to 5V. It includes a power diode and low ESR capacitor that can support up to 5A of output current. In addition to the standard 12V input, it also supports 9V and 24V inputs when used in AC/DC applications.

The ISL6721 has a constant frequency divided mode control which prevents sub-harmonic oscillation and allows for highly accurate output regulation. With its integrated soft-start and power-good features, it also offers power system designers an optimal solution for their application. The board also features a logic level enable input that can be used to control the power up and down of the board.

The ISL6721EVAL1 board has been designed to counter various inefficiencies that are associated with traditional off-line switching modes. With its built-in ripple current limiting, the board can reduce buried losses in the transformer that can result in power loss and heat build-up. Its low power start-up feature helps reduce the current that is drawn from the AC line. And, its over-current protection can safeguard the board from potential product damage. Moreover, its thermal shutdown feature provides an additional layer of protection in case of any fault conditions.

In conclusion, the ISL6721EVAL1 evaluation board is an invaluable tool for helping power system designers evaluate and understand the features and functions of the ISL6721 synchronous buck controller. It offers a complete solution for both DC/DC and AC/DC applications while providing a safe, reliable, and efficient solution. With its various protective features, it can help ensure reliable operation of end equipment and systems.

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