IC VIPER22A Low power OFF-line SMPS primary switcher Features Fixed 60 kHz switching frequency 9 V to 38 V wide range VDD voltage Current mode control Auxiliary undervoltage lockout with hysteresis High voltage start-up current source Overtemperature, overcurrent and overvoltage protection with auto-restart
INFO PRODUCT " http://www.st.com/web/en/resource/technical/document/datasheet/CD00087939.pdf " " http://www.st.com/web/en/resource/technical/document/application_note/CD00159053.pdf "