STMicroelectronics Low-THD 350W CCM-PFC pre-regulator based on L4985 PFC Controller for L4985

The STMicroelectronics evaluation board, based on the new L4985 continuous conduction mode power factor controller and implements a 350 W wide range input PFC pre regulator. It is suitable for all SMPS from 150 W to several kW. Thanks to the embedded 800 V high voltage start up circuitry and the new patented control method .The main features of this design are the minimal component counts, the simple and easy design and very low input current distortion in all operating conditions.

• Universal input voltage range is 90 to 265 Vac, 45 to 65 Hz
• Power Good output or input signals
• Switching frequency: 65 kHz
• Efficiency peak is 97.8 percent
• Mains harmonics meets EN61000-3-2 Class-D and JEITA-MITI Class-D
• EMI is according to EN55022 Class-B