LM5023

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM5023 SNVS961E – APRIL 2013 – REVISED JANUARY 2016 LM5023 AC-DC Quasi-Resonant Current Mode PWM Controller 1 Features 1 Critical Conduction Mode Peak-Current Mode Control Skip-Cycle Mode for Low-Standby Power Hiccup Mode for Continuous Overload Protection Cycle-by-Cycle Overcurrent Protection Maintains Accuracy Over the Universal AC Line Line-Voltage Feedforward OVP Protection by Sensing the Auxiliary Winding Integrated 0.7-A Peak Gate Driver Direct Opto-Coupler Interface Leading Edge Blanking of Current Sense Signal Maximum Frequency Clamp 130 kHz Programmable Soft-Start Thermal Shutdown 8-Pin VSSOP Package Create a Custom Design using the LM5023 with the WEBENCH Power Designer 3 Description The LM5023 is a quasi-resonant pulse width modulated (PWM) controller which contains all of the features needed to implement a highly efficient offline 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 skipcycle 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 pr...