SECO-HVDCDC1362-15W-GEVB: 15 W SiC High-Voltage Auxiliary Power Supply for HEV & BEV Applications

SECO-HVDCDC1362-15W-GEVB is highly efficient and primary-side regulated (PSR) auxiliary power supply targeting HEV and EV automotive power trains. The design provides a stable 15 V output and 15 W over a wide input DC voltage range from 250 V to 900 V, and is therefore suitable for 400 V and 800 V battery systems. The board employs the NCV1362 quasi-resonant peak current PSR flyback controller, the 3-lead cost-optimized NVHL160N120SC1 160 m 1200 V silicon carbide (SiC) MOSFET, and the FFSD0665B-F085 SiC diode.

Thanks to the high blocking voltage capabilities and ultra-low gate charge (34 nC) value of the SiC FET, the switching losses are significantly reduced, and the board exhibits a superior efficiency for the application up to 86% in low line input conditions. The notable driving capabilities of the NCV1362 controller allows for direct operation of the SiC FET at 12V without a pre-driver, simplifying the layout and cutting down the component count.

The flyback transformer provides 4 kV isolation and is optimized to minimize the losses on the RCD snubber. Consequently the system effectively dampens the drain voltage overshoot at high line, and provides 100 V margin for the SiC FET. The board is fully realized with automotive qualified semiconductors and passive devices. Industrial grade replacements are also available.

Features and Applications


  • NCV1362 (Automotive) / NCP1362 (Industrial) Quasi-resonant Peak Current PSR Flyback Controller
  • Fully Automotive Qualified Devices
  • Vin = 240 V - 900 V DC Only
  • Vout = 15 V / 15 W Continuous
  • Electromagnetic Compatibility (EN 55015 Limits)
  • High Efficiency up to 86%
  • SiC FET Directly Operated at 12 V by the IC
  • Excellent Thermal Performance


  • Superior Efficiency with SiC Devices
  • Stable Performance across a Wide Input Voltage Range (250 Vdc ? 900 Vdc )
  • Reduced Bill-of-Material and Cost-optimized
  • Fully AEC-Q Qualified Parts
  • EMC within EN 55015 Limits
  • Single Layer PCB


  • EV Charging and DC-DC Conversion
  • HEV & EV Vehicles Auxiliary Power Supplies
  • Automotive Powertrain Systems
  • Industrial DCDC Conversion, Solar Inverts (with Industrial grade)
Evaluation/Development Tool Information
Product Status Compliance Short Description Parts Used Action
15 W SiC High-Voltage Auxiliary Power Supply for HEV & BEV Applications NCV1362AADR2G NVHL160N120SC1
Technical Documents
Type Document Title Document ID/Size Rev
Video Automotive High Voltage Auxiliary Power Supply WVD17468/D   
Eval Board: Manual SECO-HVDCDC1362-15W-GEVB User's Manual EVBUM2752/D - 2563 KB  2 
Eval Board: BOM SECO-HVDCDC1362-15W-GEVB Bill of Materials (ROHS Compliant) SECO-HVDCDC1362-15W-GEVB_BOM_ROHS - 611 KB  2 
Eval Board: Gerber SECO-HVDCDC1362-15W-GEVB Gerber Layout Files (Zip Format) SECO-HVDCDC1362-15W-GEVB_GERBER - 215 KB  1 
Eval Board: Schematic SECO-HVDCDC1362-15W-GEVB Schematic SECO-HVDCDC1362-15W-GEVB_SCHEMATIC - 338 KB  1 
Eval Board: Test Procedure SECO-HVDCDC1362-15W-GEVB Test Procedure SECO-HVDCDC1362-15W-GEVB_TEST_PROCEDURE - 755 KB  1 
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