An Plastic Square LLC Transformer is a type of transformer that uses an LLC resonant circuit to regulate the voltage output. The LLC resonant circuit consists of an inductor (L), a capacitor (C), and another inductor (L), arranged in a series-parallel configuration. The LLC transformer is designed to operate at high frequencies, typically in the range of 100 kHz to 1 MHz, and is used in power supplies and other applications where high efficiency and low noise are important. The LLC transformer can provide high voltage conversion efficiency, low electromagnetic interference (EMI), and high power density. It is commonly used in applications such as LED lighting, renewable energy systems, and electric vehicle charging. The company's products are widely used in new energy, photovoltaic, medical, industrial power supply, communication equipment, various chargers, consumer electronics and other electronic products.