EVALSF3-ICE3B2065P

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The EVALSF3-ICE3B2065P is an important part of the range of evaluation boards for DC/DC & AC/DC (Off-Line) SMPS. This evaluation board is designed to supply smooth switching power supply up to 300W, and it provides an excellent platform for demonstrators, developers and customers who need a customizable and configurable off-line switching power supply.

EVALSF3-ICE3B2065P is based on a Fairchild 650V, 3A Integrated Power Stage (ICE3B2065P), making it an ideal solution for a variety of applications like ATX PSU, low power audio amplifier or flat-panel display power supplies. The complete board includes an input EMI filter, a soft start RC network, an over-current protection circuit, an optocoupler for feedback loop, a fixed switching frequency PWM controller with onboard active loop compensation, and a thermal shutdown circuit.

The evaluation board complies with international safety standards and supports worldwide AC mains input: 100-245 VAC 50/60 Hz. It features wide adjustment of line regulation, low output noise, and very low overshoot and undershoot with peak current controlled. It also provides high efficiency up to 90%. The evaluation board also has a Wi-Fi programming and monitoring interface for online configuration and parameter visualization.

The EVALSF3-ICE3B2065P evaluation board supports various operating modes and allows for easy testing and measuring of the IC performance. It provides multiple possibilities to customize and configure the SMPS, such as fixed frequency or quasi-resonant operation, external notch balun or active clamp reset, etc. The wide input and output DC voltage ranges enable flexible adjustment of required output voltage, making the evaluation board suitable for any application.

In terms of working principle, the EVALSF3-ICE3B2065P evaluation board consists of several components that work together. When AC mains is connected to the input of the board, the power factor correction circuit first reduces the total harmonic distortion of the input waveform. Then, the rectified DC voltage is fed into the switching power supply. After that, the input voltage is transformed into the desired output voltage through the switching elements within the IC.

The switching elements (transistors) are driven by a fixed frequency pulse width modulated (PWM) signal generated by the internal IC PWM controller. This controller monitors the output through the feedback loops, and adjusts the duty cycle of the PWM signal to maintain the required output voltage. Lastly, the ICE3B2065P is fitted with a thermal shutdown circuit to protect the IC from over temperature.

In conclusion, the EVALSF3-ICE3B2065P evaluation board is an excellent choice for developers who need to evaluate and customize their off-line SMPS, providing a wide range of configuration options and an easy way to monitor and control the board. The board features wide input and output ranges, high efficiency, and excellent performance in different operating modes. Thanks to its robust and reliable architecture, it can be used for a variety of applications.

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