STEVAL-ISA029V1

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The STEVAL-ISA029V1 is an evaluation board used in DC/DC and AC/DC (Off-Line) Switched Mode Power supplies (SMPS). The board is specifically designed for two-stage topologies, specifically a buck pre-regulator followed by a flyback converter. This board offers a maximum output of 15 W of continuous power from a 24 V DC input.

The two-stage architecture of this product is a proven technique for meeting both system reliability and efficiency requirements of high power DC/DC and AC/DC applications. The pre-regulator provides fast transient response with excellent load and line regulation, while minimizing system harmonic levels. The flyback stage is what allows a wide range of input voltage to be converted to a stable, well-regulated output.

The STEVAL-ISA029V1 features a dual output (5V/12V). This two-stage architecture makes it possible to design high efficiency converters with a wide input voltage range, ranging from 18 to 36 V DC. Due to its low component count and symmetry of the output voltages, the design process is relatively simple.

The working principle of the STEVAL-ISA029V1 is straightforward and consists of two stages. The first stage is the pre-regulator, a buck converter that provides fast transient response with excellent load and line regulation, while minimizing system harmonic levels. The second stage employs a flyback converter to convert the remaining voltage to the desired output voltage.

The STEVAL-ISA029V1’s pre-regulator implements a simple PWM technique to generate a regulated low voltage DC supply, which is then passed through a flyback transformer to obtain the desired output voltage. The flyback transformer provides an additional level of regulation and helps to provide an efficient, low-power solution for a wide range of applications.

The board is provided with an on-board oscilloscope, digital multimeter, and a power and voltage monitoring circuit. The power monitoring circuit will monitor the mains input and will indicate when the power is within safe operating limits. The voltage monitoring circuit will indicate the control loop stability and ensure an accurate output voltage.

The STEVAL-ISA029V1 also features adaptive overcurrent, short circuit and overvoltage protection. This will protect the low voltage stage from short circuits, overcurrents and overvoltage conditions. Additionally, the board is provided with an inrush current limiting circuit, which helps to limit the inrush current During startup.

With its wide range of protection features and flexibility, the STEVAL-ISA029V1 evaluation board is a great solution for power supply engineers who need a reliable and efficient evaluation board to test their designs. The board is a cost-effective and efficient way to perform power supply testing and debugging in high power DC/DC and AC/DC applications.

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