TransphormHighest Performance, Highest Reliability GaN

3.3kW Bridgeless Totem-pole PFC GaN Reference Design

The TDTTP3300-RD 3.3kW bridgeless totem-pole PFC reference design provides an excellent platform for evaluating the performance of Transphorm’s GaN FETs and a starting point for designing a high-efficiency DSP-based PFC converter. This DSP firmware-based totem-pole PFC gives power hardware designers a fully functional design solution with no digital code expertise required, reducing design time and accelerating time to market.


  • Power: 3300W
  • Switching frequency: 50-150kHz
  • Universal input range: 85-265VAC, 15ARMS
  • Firmware-programmable VOUT: 373-397VDC
  • Features TP65H050WS

Key features

  • DSP firmware-based state-machine for fully-functional PFC converter
  • Facilitates DSP-based design without code expertise
  • User-defined operational parameters, e.g., VOUT, switching frequency, soft-start, fault limits, etc.


Typical Performance Curves

Output Power (W)

Output Power (W)

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