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.

Simple block diagram of 1 kW full-bridge DC-DC converter.
Simple Block Diagram
Efficiency curve of 1 kW full-bridge DC-DC converter.
Efficiency Curves


Input voltage DC -36 to -60 V
Output voltage DC 54 V
Output power 1 kW
Circuit topology Phase-Shifetd Full-Bridge + Synchronous Rectification


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

Reference design files

Design, Document

“Design・Document” contains the documents listed below.


Design, File

“Design・File” contains the contents listed below.

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

Toshiba items

Part Number Device Category Portion Usage Description


Primary-side・4 U-MOSX-H/80 V/2.43 mΩ (max) @VGS = 10 V/SOP Advance
TPH1500CNH MOSFET Secondary-side・8 U-MOSVIII-H/150 V/15.4 mΩ (max) @VGS = 10 V/SOP Advance
TLP2370 Photocoupler Communication between primary-side and secondary-side ・2 For high-speed communication/20 Mbps/Totem-pole output (BUF)/5pin SO6
TLP291(SE Photocoupler Output voltage feedback・1 DC input/Transistor output/BVS = 3750 Vrms/SO4



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