TransphormHighest Performance, Highest Reliability GaN


Open frame 600 W Isolated DC-DC LLC Adapter Reference Design using Transphorm SuperGaN Technology

The TDDCDC-TPH-ON-LLC-600W-RD is a 600 W 48 V 13 A LLC implementation with peak efficiency of greater than 97.8%, a power density of 107 W/in3 using 2 Transphorm GaN TP65H150G4PS (650 V SuperGaN FET) TO-220 with Transphorm’s latest SuperGaN® Gen IV technology with On Semi’s NCP1399 LLC controller with output voltage (48 V / 13 A), with natural convention not using forced air.

This DC-DC adapter is ideal for applications such as High-Power-Density as a DC/DC Power Section in AC/DC Supplies, Game Computing Supplies, Fast charging, Laptops and IoT devices, etc.


  • Up to 600 W Output Power
  • Transphorm SuperGaN TP65H150G4PS TO-220 x 2
  • LLC topology
  • Board-end over ~97.8% Efficiency
  • Flat Efficiency Across Load
  • Tight Switching Frequency Regulation
  • Up to 170 kHz Switching Frequency Operation
  • OTP, UVLO, OCP and OSC Protections
  • < 300 mW No Load Power Consumption
  • Easy-to-use platform to investigate GaN


  • High-Power-Density as a DC/DC Power Section in AC/DC Supplies
  • Game Computing Supplies
  • Fast charging
  • Laptops and IoT devices


Typical Performance Curves

Output Power (W)

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