SLAAEO7 September   2024 DRV7308 , DRV8847 , IWRL6432 , TMP61 , TMS320F2800137

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Power Factor Correction (PFC)
  6. 3 Flyback Auxiliary Power Supply
  7. 4 Motor Controller Based on C2000 DSP and FAST Observer
  8. 5 GaN IPM DRV7308 for High-Efficiency Fan Drive
  9. 6 Electronic Expansion Valve (EEV)
  10. 7 DSP With Edge AI Feature
  11. 8 Temperature Sensor
  12. 9 mmWave Radar
  13. 10References

2 Power Factor Correction (PFC)

The current mainstream PFC employs a bridge-based solution, utilizing IGBT or MOSFET as the switching device. This approach results in significant losses in the input bridge rectifier and power switches, leading to an overall efficiency of only around 96-97%. Additionally, due to limited switching frequency, the size of boost inductor is big, consequently increasing the overall volume and weight of the PFC.

TI has introduced a Totem-Pole PFC solution based on the third-generation semiconductor GaN. This Totem-Pole PFC replaces the traditional diode bridge with active switches and utilizes GaN instead of MOSFETs, thereby enhancing efficiency with a peak efficiency exceeding 99%.

Due to the improved efficiency and faster switching frequency, the Totem-Pole PFC is well-suited for high-power-density applications. It can further reduce the size of the boost inductor, ultimately enhancing power density.

TIDA-010203 and TIDA-010236 are two digital Totem-Pole PFC reference designs based on GaN and C2000, achieving peak efficiencies of 99.1% and 98.6%, respectively.