STEVAL-ISA106V1

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Introduction

STEVAL-ISA106V1 is a high-performance evaluation board developed to study the control characteristics, features and performance of ST high-performance pulse width modulation (PWM) controllers for non-isolated DC/DC and AC/DC offline SMPS. The STEVAL-ISA106V1 is an ideal platform for assessing the protected characteristics of these devices in different applications.

Application Field

The STEVAL-ISA106V1 provides an environment for studying ST pulse width modulation controllers and their functions, in particular for offline non-isolated DC/DC and AC/DC switched-mode power supply applications. It is designed to evaluate the performance of STMicroelectronics PWM controllers for DC/DC and AC/DC non-isolated SMPS with output power up to 25W. It is possible to evaluate any type of integration in a single PCB, including non-overlapping drive of multiple gate drivers, over-voltage protector, supply under-voltage lockout, line sense, temperature control, current foldback protection and line over-voltage shutdown protection.

Working Principle

Under normal working conditions, the output voltage of the STEVAL-ISA106V1 is regulated by controlling the duty cycle of the output stage. The output of the STEVAL-ISA106V1 is determined by the power transistor that is driven by the PWM controller via its proportional control circuit. The PWM controller adjusts its output voltage in response to the input voltage that is supplied to the proportional control circuit. The PWM controller will modulate the output in order to maintain a constant output voltage. The PWM controller also provides protection against over-voltage, under-voltage, over-temperature, and current foldback.

The STEVAL-ISA106V1 also features a line sense circuit which senses the input line voltage and ensures the correct operating voltage on the input of the PWM controller even during start up. The line sense circuit also provides protection against over-voltages and under-voltages. This board also has an efficient thermal management system, which includes a temperature sensor for a monitoring and feedback loop. The thermal pad is connected to the baseplate and the PCB of the evaluation board, which effectively dissipates heat from the device.

Conclusion

The STEVAL-ISA106V1 is an ideal evaluation board for studying the performance and protected characteristics of ST pulse width modulation controllers for non-isolated DC/DC and AC/DC offline SMPS. Its low-power, low-cost design makes the board uniquely suitable for prototyping and development. It offers a wide array of features and functions including over-voltage protection, under-voltage lockout, line sense, temperature control, current foldback protection, and line over-voltage shutdown protection. The STEVAL-ISA106V1 is a powerful tool for analyzing the characteristics of ST pulse width modulation controllers and evaluating the performance of its various safety features and functions.

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