1.6 kW 48 V Output Telecommunication Equipment Power Supply

This reference design provides design guide, data and other contents of 1.6 kW 48 V output power supply using semi-bridgeless PFC and isolated phase-shift full-bridge DC-DC converter.

Exterior photo of 1.6 kW 48 V output telecommunication equipment power supply.
Simple block diagram of 1.6 kW 48 V output telecommunication equipment power supply.


  • 1U rack size high efficiency high power output power supply
  • Output voltage 48 V
  • Total efficincy:94.6 % (Vin = 230V at 100 % load condition)
  • Outline size:318 mm x 127 mm x 43 mm (including the base plate under the PCB and top plate covering over the heatsinks)
  • Provides appropriate power devices (MOSFET and SiC diode) and photocouplers totally


Input voltage AC 90 to 264 V
Output voltage DC 48 V
Output power 0.8 kW (AC 100 V system input), 1.6 kW (AC 200 V system input)
Circuit topology Semi-Bridgeless PFC, Phase-Shift Full-Bridge + Synchronous Rectification, Oring Circuit for Output
Efficiency curves of 1.6 kW 48 V output telecommunication equipment power supply.
Efficiency Curves

Design Documents

Design Documents contain the documents below.

Design Data

Design Data 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.

Used Toshiba Items

Part Number Device Category Portion Usage Description
Power MOSFET (N-ch 500V<VDSS≤700V) PFC・2 N-ch MOSFET, 600 V, 0.125 Ω@10V, TO-247, DTMOSⅣ-H
SiC Schottky barrier diode PFC・2 650 V/8 A SiC Schottky Barrier Diode, TO-220F-2L
Power MOSFET (N-ch 500V<VDSS≤700V) Primary side・4 N-ch MOSFET, 600 V, 0.14 Ω@10V, TO-247, DTMOSⅣ-H
Power MOSFET (N-ch 150V<VDSS≤250V) Secondary side・8 N-ch MOSFET, 200 V, 0.029 Ω@10V, SOP Advance, U-MOSⅧ-H
Power MOSFET (N-ch single 60V<VDSS≤150V) Oring・4 N-ch MOSFET, 80 V, 0.00243 Ω@10V, SOP Advance, U-MOSⅩ-H
Photocoupler (photo-IC output) Communication between primary side and secondary side・4 Photocoupler (photo-IC output), High-speed, 50 Mbps, 5000 Vrms, SO6L

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