The STMicroelectronics L6668TR is a Switching Controller with a Flyback topology. It operates within a voltage range of 9.4V to 22V and features a 70% duty cycle.
The STMicroelectronics VIPER26LDTR is an offline switch IC designed for flyback topology. It operates with an input voltage range of 11.5V to 23.5V and delivers up to 20W of power.
The STMicroelectronics L6566BHTR is an offline switcher IC featuring a flyback topology. It operates with a supply voltage range of 8V to 23V and a switching frequency up to 300kHz.