1 kW Full-Bridge DC-DC Converter

This reference design provides design guide, data and other contents of 1 kW server power supply using phase shifetd full-bridge DC-DC converter.

Exterior photo of 1 kW full-bridge DC-DC converter.

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  • High efficiency and high power power supply
  • Total efficiency:94.7 % (Vin = -54 V at 100 % load)
  • Outline size:207 mm x 120 mm x 45 mm
  • Provides appropriate power devices (MOSFET) and photocouplers totally


Input voltage DC -36 to -60 V
Output voltage DC 54 V
Output power 1 kW
Circuit topology Phase-Shifetd Full-Bridge + Synchronous Rectification
Efficiency curve of 1 kW full-bridge DC-DC converter.
Efficiency Curves

Design Documents

Materials for designers, such as an overview of circuit operation and explanations of design considerations. Please click on each tab to view the contents.

Design Data

Provides circuit data that can be loaded into EDA tools, PCB layout data, and data used in PCB manufacturing. Available in formats from multiple tool vendors. You can freely edit it with your preferred tool.

*1:Actual PCB was designed on CR5000BD. The other files were made from CR5000BD file.

*2:The data was generated on CR5000BD.

Used Toshiba Items

Part Number Device Category Portion Usage Description
Power MOSFET (N-ch single 60V<VDSS≤150V) Primary-side・4 N-ch MOSFET, 80 V, 0.00243 Ω@10V, SOP Advance, U-MOSⅩ-H
Power MOSFET (N-ch single 60V<VDSS≤150V) Secondary-side・8 N-ch MOSFET, 150 V, 0.0154 Ω@10V, SOP Advance, U-MOSⅧ-H
Photocoupler (photo-IC output) Communication between primary-side and secondary-side ・2 Photocoupler (photo-IC output), High-speed, 20 Mbps, 3750 Vrms, 5pin SO6
Photocoupler (phototransistor output) Output voltage feedback・1 Photocoupler (phototransistor output), DC input, 3750 Vrms, SO4

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