A SIM card chip size, but can carry more than 700 volts, on-resistance of only 30 milliohms, to achieve efficient and low power conversion. This is the "heart" MOSFET (Metal Oxide Semiconductor Field Effect Transistor) for new energy vehicle charging piles. April 12, the reporter learned from Suzhou Microelectronics Co., Dongfeng, new energy vehicles DC high-power charging pile with the core chip has been successfully mass production, breaking the monopoly of foreign manufacturers.
In recent years, the rapid development of new energy vehicles in China, commonly known as "fast charge" DC charging pile has been all over the highway, parking. DC charging pile generally consists of communication module, switching power supply module and control module. Among them, the MOSFET is the most important part of the switching power supply module, is the key component to achieve high-efficiency conversion of power to ensure that the charging pile is stable but not overheating.
"After the AC power enters the pile, the MOSFET controls the on-off of the current through the control chip to form a pulse current, which is converted into the DC power needed by the new energy vehicle through inductive coupling." Gong Yi, General Manager of Dong Microelectronics introduced.
MOSFET cost of the entire switching power supply module costs about 20%. In a switching power supply module, you need to use several or even a hundred MOSFETs. In the past, this field was monopolized by foreign manufacturers, a large number of domestic manufacturers purchasing imported brands of MOSFET, not only expensive, but also often out of stock.
Dong Microelectronics after two years of research and development, a full set of original patented technology, has now achieved high-speed charging pile with high-speed MOSFET series of mass production, the domestic charge pile business volume applications. At the same time, the product is also exported to Korea, Japan and Germany. At the same time, but also widely used in mobile phone charger, LED lighting, monitors, industrial lighting and other power conversion areas.
"Compared to international brands, we have developed MOSFETs with lower power loss and higher current conversion efficiency, longer term outdoor use, and lower prices by 10% -20%," said Gong Yi.
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