TransphormHighest Performance, Highest Reliability GaN


4kW Totem-pole PFC GaN Evaluation Platform with Microchip’s dsPIC® Digital Power PIM

The TDTTP4000W066C 4kW bridgeless totem-pole power factor correction (PFC) evaluation board achieves very high efficiency single-phase AC-DC conversion. Using Microchip's dsPIC along with Transphorm GaN FETs in the fast-switching leg of the circuit and low-resistance MOSFETs in the slow-switching leg of the circuit results in improved performance and efficiency. The TDTTP4000W066C-KIT is for evaluation purposes only.


  • Power: 4000W
  • Switching frequency: 66kHz
  • Microchip dsPIC33CK256MP506 Digital Power PIM
  • Features TP65H035G4WS (SuperGaN)
  • Easy-to-use platform to investigate GaN


  • Data center power supply
  • Broad industrial power supply


Typical Performance Curves

Output Power (W)

Output Power (W)


Application Notes

AN0010: GaN FETs in Parallel Using Drain Ferrite Beads and RC Snubbers for High-power Applications
AN0009: Recommended External Circuitry for Transphorm GaN FETs
AN0008: Drain Voltage and Avalanche Ratings for GaN FETs
AN0002: Characteristics of Transphorm GaN Power FETs
AN0003: Printed Circuit Board Layout and Probing for GaN FETs
AN0004: Designing Hard-switched Bridges with GaN
AN0006: VGS Transient Tolerance of Transphorm GaN FETs

Design Guides

DG004: Multi-pulse Testing for GaN Layout Verification (and DSP Code)
DG005: Ultrafast Overcurrent Breaker Circuit for Prototyping (and Design Files)

TP65H035G4WS Datasheet

Complete Design Files

Download all design files (zip)


Download schematic (.sch) file (zip)
Download schematics (pdf)

Gerber Files

Download gerber files (zip)

The TDTTP4000W066C evaluation kit includes firmware loaded in flash on the microcontroller. Additional firmware is provided to modify the source code.

Firmware Files

Download Firmware files

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