SI3401ISO-EVB

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SI3401ISO-EVB is an evaluation board typically used for DC/DC & AC/DC (Off-Line) SMPS. Specifically, it is used to evaluate and optimize the performance of non-isolated SMPS, featuring a 3-phase current-mode control. It is widely used in power supplies, adapters, battery chargers, and other applications demanding ultra-low output ripple. The SI3401ISO-EVB evaluation board contains three major components: The SI3401ISO boost controller IC, a suitable power MOSFET, and a unique two-stage magnetics topology. This combination allows the design of small, low cost, and highly efficient buck-boost converters in the range of 2-60W. The main unit further utilizes advanced circuit protection, featuring over-voltage and under-voltage protection, current limiting and thermal shutdown. This evaluation board takes both input and output voltages in the range of 300mV-400V. Moreover, this board is designed to withstand a wide operating temperature range, from -40℃ to +125℃. The board\'s input power is typically derived from the 3-phase sinusoidal AC input, such as 1-phase 115V or 230V, or 3-phase 0V-208V. The board typically operates anywhere between a power range of 2W-60W. Other features of the SI3401ISO-EVB includes enabling voltage AC/DC synchronization, using various digital signals such as I2C, SPI, or PWM, and built-in digital diagnostic systems. The board also features power feedback control and auto burst mode operations, allowing power friendly standby modes while keeping the power supply on. The SI3401ISO-EVB is based on a highly efficient closed loop synchronous buck-boost topology, which uses a switch coupled with a gate driver to control the converter operation. This topology is employed to create a continuous resonant charging process, thereby allowing it to regulate the input current, deliver higher dynamic current accuracy, and offer higher power efficiency. The main controller of the board is the SI3401ISO boost controller IC, which relies on a pair of high-current logic-level MOSFETs as the main switches. It is designed for higher efficiency and better EMI performance. The controller IC uses flexible control options such as frequency 20KHz/100KHz, current programming, or voltage programming to manage the converter operations. The board also uses a unique two-stage magnetics topology for optimum circuit performance. This topology offers a number of benefits, including improved efficiency, increased power density, reduced component size, and increased reliability. It also reduces stress on the secondary rectifier, resulting in better EMI performance, improved power efficiency, and better load transient response.The SI3401ISO-EVB also features precise current scaling and cycle-by-cycle over-voltage protection. This ensures that the converter operates within safe limits and provides improved system integration of the converter. It also features a continual check on the outputs, maintaining the required regulation of the output voltage, and providing better load transient response. Overall, the SI3401ISO-EVB is a powerful and versatile evaluation board for DC/DC & AC/DC (Off-Line) SMPS applications. It offers a number of features such as high efficiency, low ripple, high power density, power friendly standby modes, and improved EMI performance. This evaluation board is also safe and reliable, making it an ideal choice for power supplies, adapters, chargers, and other applications.

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