SLLA602 March   2024 LM5110 , LM5111 , TPS2811 , TPS2811-Q1 , TPS2812 , TPS2813 , TPS2814 , TPS2815 , UCC27323 , UCC27324 , UCC27324-Q1 , UCC27325 , UCC27423 , UCC27423-EP , UCC27423-Q1 , UCC27424 , UCC27424-EP , UCC27424-Q1 , UCC27425 , UCC27425-Q1 , UCC27444 , UCC27444-Q1 , UCC27523 , UCC27524 , UCC27524A , UCC27524A-Q1 , UCC27524A1-Q1 , UCC27525 , UCC27526 , UCC27527 , UCC27528 , UCC27528-Q1 , UCC27624 , UCC27624-Q1 , UCC37323 , UCC37324 , UCC37325 , UCD7201

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2How a Gate Drive Transformer Works
  6. 3Benefits of a Gate Drive Transformer
  7. 4Design Considerations of a Gate Drive Transformer
    1. 4.1 Duty Cycle Limitation
    2. 4.2 Transients and Noise
    3. 4.3 Calculations
    4. 4.4 Power Loss Calculations
    5. 4.5 Bias Supply Thermal Calculation
  8. 5Summary
  9. 6References

5 Summary

Even after the invention of high-voltage and isolated gate drivers, there are still applications where a gate drive transformer paired with a non-isolated driver is a competitive option. Push-pull gate drive transformers offer various benefits in applications which work well within the duty cycle limitation of the transformer. Particularly, gate drive transformers are useful in LLC converters and PSFB converters. Gate drive transformers can be used to eliminate a bias supply, provide negative gate drive bias, and flexibility by taking advantage of the transformer turns ratio. In addition, gate drive transformers can be used to generate bias supplies for isolated gate driver ICs and other ICs. With all of these potential advantages, gate drive transformers still have a place in many systems.