STEVAL-ISA147V2

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The STEVAL-ISA147V2 is an off-line SMPS evaluation board which is part of STMicroelectronics\' Evaluation Board Range. It is designed to evaluate STMicroelectronics\' flyback switching converter topology for generic applications ranging from 1 Watt to 10W output power. The STEVAL-ISA147V2 board features an isolated PFET for synchronous rectification, a digital soft-start feature, and a built-in standby function with energy harvesting. It also includes an optional power MOSFET that can be used to optimize power saving performance.

The STEVAL-ISA147V2 is based on STMicroelectronics\' advanced flyback controller ICs, which implements an average current-mode control scheme. It provides high power factor, pre-regulated output voltage, open drain logic voltage, and chip Disable control functions. The board reduces design complexity and eliminates the need to design a separate voltage regulator circuit for a wide range of applications. With the on-board integrated MOSFET, the board is capable of delivering high performance with low cost, low power consumption, and EMI reduction.

The main operating principle of the STEVAL-ISA147V2 is its power factor correction (PFC) capability. PFC is a power management technology that uses active components that convert alternating current input into DC output, increase power efficiency and reduce harmonic distortion. The STEVAL-ISA147V2 utilizes a high-frequency flyback in combination with an integrated MOSFET and a PFC controller IC. This allows the device to reduce the amount of total harmonic distortion present on the AC line and meet standards of high-efficiency lighting. The integrated MOSFET also helps to reduce losses by providing a near zero voltage drop during conduction.

The STEVAL-ISA147V2 evaluation board also features an adjustable soft-start function, which can prolong system lifetime, reduce the inrush current at start-up, and guarantee successful continuous operation. The board also supports a digital standby mode with an energy harvesting circuit, which enables the device to remain in continuous operation even when the system is in standby mode. This can significantly reduce system power consumption and improve system reliability.

The STEVAL-ISA147V2 board provides a suite of testing and debugging features to ensure user satisfaction. It includes a waveform capture for easy measurement of waveform characteristics such as ripple and peak current. The open drain logic voltage allows users to monitor the state of the power supply output and input signals. Additionally, the board provides an option to enable or disable the power IC, as well as to measure the PFET’s gate voltage.

The STEVAL-ISA147V2 evaluation board is suitable for a wide range of applications that require high power efficiency, including industrial, automotive, medical and consumer. It is an invaluable tool for engineers to develop innovative power solutions quickly and cost-effectively, while fully addressing all important safety standards.

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