Power MOSFET Basics: Understanding Superjunction Technology
نویسنده
چکیده
Power MOSFETs based on superjunction technology have become the industry norm in high-voltage switching converters. They offer lower RDS(on) simultaneously with reduced gate and output charges, which allows for more efficient switching at any given frequency. Prior to the availability of superjunction MOSFETs the dominant design platform for high-voltage devices was based on planar technology. However, fast switching at high voltages poses its own challenges in AC/DC power supplies and inverters. Designers making the transition from planar to superjunction MOSFETs often have to accommodate EMI, voltage spikes, and noise-related concerns by compromising switching speed. Below we will compare the characteristics of the two platforms so that the benefits of superjunction technology are fully understood and utilized.
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