EA4050YH

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EA4050YH is an evaluation board from TDK that can be used as a DC/DC, AC/DC or off-line SMPS. It is based on the proven coreless PFC and LLC topology, taking full advantage of TDK\'s extensive power conditioning product portfolio and wide expertise in power conversion technology.

The EA4050YH offers a complete system solution with a high power factor rating of >94%. Its wide output power range (1W to 40W) and input voltage range (85 to 265 Vac) enable the board to be used in a variety of applications. The board also has excellent EMI characteristics meeting Class B radiated and conducted requirements. Additionally, the board can be used for global applications as it is designed to comply with various EMC and safety international standards, including IEC60950, UL60950 compliances.

The main application fields of the EA4050YH are device chargers, LED lighting, consumer appliances, audio/video equipment, water heating appliances, office automation equipment, medical products, control boards, and etc. The modular design of this evaluation board makes it possible to switch between different types of applications, to meet the ever-changing needs of the market.

The EA4050YH working principle is based on the coreless PFC and LLC topology, which allows for high power factor and higher switching frequencies. The input voltage is regulated through a PFC circuit at the front end, and the DC rail is then passed to an LLC converter at the output section. The LLC converter is composed of two inductors and one capacitor linked by switches and diodes, and is driven by a resonant active clamped circuit. The resonant active clamped circuit is responsible for providing the high frequency switching, and also providing the primary side voltage feedback as well, ensuring that the output voltage is kept in a tight tolerance.

The major features of the EA4050YH include its high power factor, low THD (total harmonic distortion), excellent EMI performance, and low audible noise. Additionally, the board supports high input voltage range and has a wide range of output voltage changes, making it suitable for different loads. The board also has soft start parameters to avoid inrush current and a soft recovery parameter for an optimal performance. The parts of the device are UL approved, helping to further ensure safety in the device\'s application.

To sum up, the EA4050YH power evaluation board is an ideal solution for a variety of applications. It is based on the coreless PFC and LLC topology, providing excellent power factor, EMI and THD performances. Its wide input and output voltage range make it suitable for global applications. Furthermore, the UL approved parts guarantee the highest level of safety for the device.

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