onsemi NCP12711ADNR2G, PWM Controller, 45 V, 30 kHz 10-Pin, MSOP10

The ON Semiconductor fixed frequency peak current mode PWM controller containing all of the features necessary for implementing single−ended power converter topologies. The device operates from 4 V to 45 V without auxiliary winding and within its thermal capabilities. The controller contains a programmable oscillator capable of operating from 100 kHz to 1 MHz and integrates slope compensation to prevent subharmonic oscillations.

Internal over power protection
Adjustable soft start on peak current and frequency
Programmable input voltage UVLO with hysteresis
Shutdown threshold for external disable