SDAA053 July   2025 UCG28824 , UCG28826 , UCG28828

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2UBS-PD versus Non-USB-PD
  6. 3Auxless Sensing Technology
  7. 4Design Examples
  8. 5Summary
  9. 6References

Abstract

UCG2882x is a high-frequency, quasi-resonant flyback converter with built-in 750V GaN high electron mobility transistor (HEMT) for AC to DC power conversion. UCG2882x is best suited for high power density applications such as cell phone fast chargers and notebook adapters. The key feature of this device is the self-bias and auxless sensing scheme which eliminates the need of the auxiliary winding and simplifies the USB-PD adapter design with higher efficiency. The device can also be used for fixed output voltage applications. In this application note, the design steps for the fixed output voltage Flyback using UCG2882x family is discussed.