The LM5023 is a quasi-resonant pulse width modulated (PWM) controller which contains all
of the features needed to implement a highly efficient off-line power supply. The LM5023 uses the
transformer auxiliary winding for demagnetization detection to ensure critical conduction mode
(CrCM) operation. The LM5023 features a hiccup mode for overcurrent protection with an auto restart
to reduce the stress on the power components during an overload. A skip-cycle mode reduces power
consumption at light loads for energy conservation applications (ENERGY STAR®, CEPCP, and so forth). The LM5023 also uses the
transformer auxiliary winding for output overvoltage protection (OVP); if an OVP fault is detected
the LM5023 latches off the controller.