STEVAL-ISA049V2

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The STEVAL-ISA049V2 evaluation board is an integral part of the STMicroelectronics family of evaluation boards. This board is designed to provide a demonstration of the performance of the company’s integrated circuits, particularly for DC/DC & AC/DC (Off-Line) SMPS. The board will come pre-assembled with the ICs, connectors, and other components required for the demonstration, and enabling the user to begin evaluation immediately. This evaluation board includes an onboard power supply, a 32-bit microcontroller, and MOSFET gate drivers. In addition, different I/O options are available depending on the type of application.

The STEVAL-ISA049V2 is intended for use in a wide range of applications, including LED panel lighting, solar inverters, telecom systems, and uninterruptible power supplies (UPS). The power supply range for this board is 12V to 48V, and it can provide up to 400W of power. It features an onboard MCU with embedded code for high efficiency and reduced power losses. The MCU also provides higher system integration and a reduction in external components.

The main features of STEVAL-ISA049V2 evaluation board are: a high-efficiency buck-boost power stage with adaptive zero-voltage switching (AZP); comprehensive protection features, including over voltage protection (OVP), short circuit protection (SCP), over temperature protection (OTP), and isolation voltage protection (IVP); integrated gate drivers for MOSFETs with propagation and thermal protection; configurable pre-bias of an active PFC; an optimized bootstrap protection circuit. These features combine to help the user achieve maximum performance from their circuit, as well as increased safety and reliability.

The working principle of the STEVAL-ISA049V2 evaluation board is based on the adaptive zero-voltage switching technology. With AZP, the gate driver voltage level is adjusted according to the voltage of the input supply, meaning that the MOSFETs are not switched on until the voltage level of the supply is above a certain value. This results in low switching losses and improved EMI performance. The board also includes a low-impedance additional voltage sense line to reduce the switching delay due to the supply’s input voltage. The board is equipped with a built-in microcontroller that allows for easy tuning to enhance performance.

In addition, the STEVAL-ISA049V2 evaluation board includes two configurable analog current sense pins, a configurable analog voltage sense pin, and a boostPFC current and thermal limitation loop. The board also includes two independent buck stages, a single-phase PFC control loop, and a comprehensive protection loop. These features, along with the embedded code for high efficiency and reduced power losses, make the STEVAL-ISA049V2 an ideal solution for designers looking to speed time to market for their DC/DC & AC/DC (Off-Line) SMPS applications.

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