Description: L4972AD is a high voltage, low power, monolithic integrated circuit designed for use in switched mode power supplies. Features: High voltage capability up to 500V Low power consumption Low quiescent current Internal thermal protection Internal current limiting Internal soft start Low output ripple Programmable frequency Programmable dead time Programmable soft start Applications: Switching power supplies DC/DC converters Motor control Lighting control Battery chargers(For reference only)
https://www.utsource.net/itm/p/907845.html