TransphormHighest Performance, Highest Reliability GaN


Open Frame 140 W USB-C PD3.1 Power Adapter Reference Design using Transphorm SuperGaN Technology

The TDAIO-TPH-MPS-USBC-140W-RD is an open frame 140 W universal USB-C Power Delivery (PD) power adapter reference design. It meets USB PD 3.1 requirements (up to 28 V/5 A) for universal chargers supporting smartphones, laptops and other IoT devices. The power supply uses the Monolithic Power Systems (MPS) CrM/DCM PFC controller (MP44018A) and the Flyback controller with integrated primary-side control circuitry and secondary-side synchronous rectification driver (MPX2002); Transphorm's TP65H150G4PS (650 V, 150 mΩ GaN FET), TP65H150G4LSG (650 V, 150 mΩ GaN FET); and Cypress's CYPD3175 USB PD controller. This design enables high power density (~28 W/in3) and over 92 percent efficiency at fullpower.


  • USB-C PD 3.1
  • Power: 140W
  • DCM PFC + QR topology
  • Efficiency: greater than 92.4% @ full power and peak @ 94.5%
  • Input Voltage: Universal (90 Vac to 264 Vac)
  • < 250 mW no load power consumption
  • Features TP65H150G4PS
  • Features TP65H150G4LSG
  • Features MP44018a
  • Features MPX2002
  • Easy-to-use platform to investigate GaN


  • Smart phones
  • Fast charging
  • Laptops and IoT


Typical Performance Curves

Output Power (W)

Output Power (W)

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