STEVAL-ISA007V1

Auxiliary SMPS is particularly affected since it is the entry point for all the biasing of control ICs and cooling system powering. Standardization towards "universal input" is reflected in more stressful conditions for the power transistor used as the main switch both in terms of blocking voltage or current capability. Since almost all auxiliary power supplies are based on fly-back converters, the need for a blocking voltage as high as 1500V and over, coupled with high switching frequency operations, make the ESBTs the perfect choice for such power supplies. The STC08DE150HV, in conjunction with the PWM L5991, perfectly fulfills the requirements and brings high efficiency to the system