ISL6261AEVAL1Z

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The ISL6261AEVAL1Z is a class of PCB evaluation board that falls into the category of evaluation boards – DC/DC & AC/DC (Off-Line) SMPS. It is a complete design with on-board 2A/3A buck-boost DC/DC converter with integrated FET. It is suitable for applications that require either positive or negative output voltages over a range of 0.6V to 6V, and is especially useful where either low input voltages or output loading characteristics require it.

The boards are able to provide 2A output current and 3A maximum output power over the specified range. In addition, the ISL6261AEVAL1Z is able to provide a wide input voltage of 4V to 40V and an adjustable switching frequency from 350kHz to 600kHz. Furthermore, integrated protection features such as under voltage lock out and an over temperature protection are also provided to secure the design.

The ISL6261AEVAL1Z evaluation board works by utilising a synchronous buck-boost DC/DC synchronous controller featuring integrated FET, allowing it to convert a wide input voltage into a tailored output voltage more efficiently than a traditional buck-boost converter. The board achieves a precise output voltage by monitoring a feedback voltage using a voltage divider network across the output terminals and comparing it with a reference voltage. When the feedback voltage exceeds the reference voltage, the MOSFET is turned off until the feedback voltage drops below the reference. The MOSFET is then switched in, delivering the required output voltage.

The board also utilises a time based current limiting protection circuit, providing fast response time and protecting the MOSFET from current overloads. On-board output soft-start and adjustable output voltage is also featured to protect against output over-shoots.

In short, the ISL6261AEVAL1Z evaluation board is ideal for applications requiring positive or negative output voltage regulation over a wide input voltage range up to 40V, and is particularly suitable where low input voltage or loading characteristics necessitates it. Its on-board components enable quick and easy implementation of a buck-boost DC/DC converter solution with protection features, making it the ideal solution for applications where the output voltage needs to be tailored precisely.

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