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Expanded SiC Schottky Diode Line from Littelfuse Reduces Switching Losses, Increases Efficiency

15 January 2018

Source: Littelfuse Inc.Source: Littelfuse Inc.

Littelfuse Inc. has introduced four new series of 1,200 V silicon carbide (SiC) Schottky Diodes from its GEN2 product family, which was originally released in May 2017.

The LSIC2SD120A08 series, LSIC2SD120A15 series and LSIC2SD120A20 series offer current ratings of 8 A, 15 A and 20 A, respectively, and are provided in the popular TO-220-2L package. Additionally, the LSIC2SD120C08 series offers a current rating of 8 A in a TO-252-2L package. The merged p-n Schottky (MPS) device architecture of the GEN2 SiC Schottky diodes enhances surge capability and reduces leakage current.

Replacing standard silicon bipolar power diodes with the new GEN2 SiC Schottky Diodes allows circuit designers to reduce switching losses dramatically, accommodate large surge currents without thermal runaway and operate at junction temperatures as high as 175 degrees Celsius. This allows for substantial increases in power electronics system efficiency and robustness.

Typical applications for these new GEN2 SiC Schottky diodes include:

  • Active power factor correction (PFC)
  • Buck or boost stages in DC-DC converters
  • Free-wheeling diodes in inverter stages
  • High-frequency output rectification

The markets they can serve include industrial power supplies, solar energy, industrial motor drives, welding and plasma cutting, EV charging stations, inductive cooking fields and others.

GEN2 SiC Schottky diodes offer these key benefits:

  • Best-in-class capacitively stored charge and negligible reverse recovery ensures switching losses are extremely low and reduces stress on the opposing switch, making them suitable for high-frequency power switching.
  • Best-in-class forward voltage drop (VF) provides for low conduction losses.
  • The maximum junction temperature of 175 degrees Celsius allows for a larger design margin and relaxed thermal management requirements.

Availability

LSIC2SD120A08 series, LSIC2SD120A15 series and LSIC2SD120A20 series GEN2 1,200 V SiC Schottky diodes are available in TO-220-2L packages in tubes in quantities of 1,000. LSIC2SD120C08 Series GEN2 1,200 V SiC Schottky Diodes are available in TO-252-2L packages in tape and reel in quantities of 2,500. Sample requests may be placed through authorized Littelfuse distributors worldwide.

To contact the author of this article, email sue.himmelstein@ieeeglobalspec.com


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