IGBT transformer- coupled gate drive

Disadvantages:
🔻Drive voltages depend on duty cycle without C1, C2, D1 and D2 to provide ‘DC restoration’ and constant positive/negative drive voltages.
🔻C1, C2 have to ‘settle’ to DC offsets on start-up and with changes in duty cycle.
🔻The transformer may have to deliver significant power (watts) so may be large and unsuitable for high frequencies.
🔻A large transformer has high coupling capacitance giving high circulating currents from dV/dt across the trans.
🔻Transformers designed for low coupling capacitance have high L leakage limiting PWM slew-rate.
🔻The transformer requires special construction to meet any safety agency standards for isolation.
🔻The transformer primary has to be driven by a high speed buffer for high power which is complex and costly.
🔻No continuous power for control and monitoring (e.g. desaturation detection).
🔻Transformer must ‘reset’ between pulses – must consider pulse width limits and reset voltage limits.

из статьи

#igbt

Да, эти ребята знают как продать больше DAC-ов.

Стандарт по безопасности, откуда сделана эта выдержка. ☝️

Testability Guidelines

Мануал по DFT (контролепригодность).

#dft

Статья по основам экранирования.

#basics
#emc