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    1. Power Supply

    N-channel Superjunction Multi-Drain Silicon MOSFETs Enhance SMPS

    May 24, 2022
    The high-voltage superjunction STPOWER MDmesh M9 series claims the best maximum on-resistance x gate charge figure of merit on the market, as well as an approximately 30% reduction in on-state resistance compared to legacy technologies.
    Related To: Electronic Design

    Check out our PCIM 2022 coverage

    STMicroelectronics’ STPOWER MDmesh M9 and DM9 N-channel superjunction multi-drain silicon power MOSFETs, which target switched-mode power supplies (SMPS), offer a very low on-resistance per unit area, maximizing power density.

    The first devices to be launched are the 650-V STP65N045M9 and 600-V STP60N043DM9, each claiming the best maximum RDS(on) in its category at 45 mΩ and 43 mΩ, respectively. With a gate charge (Qg) typically 80 nC at 400-V drain voltage, these devices are presented as having the best RDS(on)max × Qg figure of merit (FoM) currently available.

    The gate threshold voltage (VGS(th)), typically 3.7 V for the STP65N045M9 and 4.0 V for STP60N043DM9, minimizes both turn-on and turn-off switching losses, along with a low reverse-recovery charge (QRR) and reverse-recovery time (tRR).

    A further feature of ST’s latest high-voltage MDmesh technologies is an additional platinum diffusion process that ensures a fast intrinsic body diode. The peak diode-recovery slope (dv/dt) is greater than for earlier processes. All devices belonging to MDmesh DM9 technology are extremely rugged and can withstand dv/dt up to 120 V/ns at 400 V.

    For more PCIM 2022 videos, CLICK HERE.

    About the Author

    Alix Paultre | Editor-at-Large, Electronic Design

    An Army veteran, Alix Paultre was a signals intelligence soldier on the East/West German border in the early ‘80s, and eventually wound up helping launch and run a publication on consumer electronics for the US military stationed in Europe. Alix first began in this industry in 1998 at Electronic Products magazine, and since then has worked for a variety of publications in the embedded electronic engineering space. Alix currently lives in Wiesbaden, Germany.

    Also check out his YouTube watch-collecting channel, Talking Timepieces. 

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