3相辅助电源AN1889 ESBT STC03DE170HV

3相辅助电源AN1889 ESBT STC03DE170HV

AN1889
Application note
ESBT
STC03DE170HV in 3-phase auxiliary power supply

Introduction
The need to choose a high value of the fly-back voltage is well known to power supply
designers when efficiency and high duty cycle become important requirements. Three-
phase auxiliary power supplies, starting from a bulk voltage of 750 V, require theoretically
power transistors with a block voltage capability higher than 1200 V. Practical considerations
linked to better effic