SI3400ISO-EVB

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• Introduction

The SI3400ISO-EVB, also known as a "Evaluation Board" is a DC/DC and AC/DC (off-line) circuit power supply solution designed for use with low-voltage components, such as processors and memories. It is an all-in-one solution for evaluating the switching performance of a wide range of low-voltage applications, such as processor systems, gate drivers, advanced debug systems, and embedded design, allowing designers to move product development faster with enhanced features and performance.

• Applications

The SI3400ISO-EVBoffers a simple and cost-effective way to achieve a reliable DC/DC& AC/DC (off-line) switch power supply solution. It also features an onboard 3.3V/1.2V analog power supply with associated over-voltage protection circuitry, eliminating the need for an external single ended supply (like a derived supply) for these functions. This setup also improves system efficiency as the isolated system will provide sufficient power for all devices running in the design. Standard components such as the MCP7007N2 amplifier provide a wide range of switching regulator voltage options, allowing designers to select their desired voltage rail for their device or system.

The all-in-one solution allows system designers to directly assess the performance characteristics of the power supply solution. The evaluation board is designed with an on-chip power supply pad and a loop-back connector, allowing rapid connection of multiple EVBs on a single loop or connected in a series of multiple boards to get the desired output voltage level. Thanks to the efficient power transfer, designers can safely and quickly prototype their DC/DC and AC/DC (off-line) circuit power supply solutions.

The SI3400ISO-EVB is suitable for low-voltage applications such as processor systems, gate drivers, advanced debug systems, and embedded design.

• Working Principle

The SI3400ISO-EVB is designed to enable a quick and simple prototyping of DC/DC and AC/DC (off-line) circuit power supply solutions. It features an on-chip switched-mode power supply (SMPS) system for supplying power to the microcontroller or other device. This system comprises of a network of MOSFETs, inductors, and capacitors for producing DC power from a low-voltage source such as a 12V battery or wall adapter. The power conversion is regulated using a feedback loop to ensure a precise output voltage. To optimize the efficiency of the prototype, the output switching frequency and output voltage are adjustable.

The evaluation board also features over-voltage, current protection, and ESD protection circuits to protect the devices connected to the SI3400ISO-EVB from electrical over-voltage, current overload, or transient event. This helps to ensure a safe and reliable connection between the high-voltage source and the low-voltage devices while operation is taking place.

The evaluation board is also equipped with an isolator circuit to help reduce high-frequency noise and manage thermal dissipation issues that come with high-frequency switching. The isolator works by blocking the high-frequency noise from entering the device or system. The isolation circuit is capable of blocking switching signals up to 400V.

In addition, the evaluation board features an abundance of debug features such as an oscilloscope for direct visualization of the transient response and a DMM for real-time monitoring of the voltage, current, and temperature levels. This allows users to quickly troubleshoot their design, identify potential issues, and ensure the prototype is running as expected.

• Conclusion

The SI3400ISO-EVB is a complete DC/DC and AC/DC (off-line) switch mode power supply solution for low-voltage applications. With its integrated power supply pad, loop-back connector, adjustable switching frequency, and efficient power transfer, the SI3400ISO-EVB simplifies the design and prototyping process while ensuring reliable power delivery. Furthermore, the on-board debug features enable quick and easy troubleshooting of any issues that may arise. The SI3400ISO-EVB is a convenient and cost-effective solution for evaluations and small-scale production runs.

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