RT7313GS

The RT7313GS from Richtek is a Power Factor Correction (PFC) controller with critical conduction mode (CRM) in 8 pin SOP package. It is designed to meet line current harmonic regulations for the applications of AC/DC adapters, electronic ballasts and medium off-line power converters (<300W). The CRM and feed forward schemes provide near unity power factor across a wide range of input voltages and output powers. The totem pole gate driver provides powerful driving capability for power MOSFET to improve conversion efficiency. The RT7313 supports a disable function to reduce power consumption in standby mode which makes it easy to comply with energy saving regulations such as Blue Angel, Energy Star and Energy 2000. Typically applications include electrical lamp ballast, LED lighting, AC/DC adapter/charger for desktop PC, NB, TV, monitor etc and entry level server, web server.

• Constant on-time control (voltage mode)
• Ultra low start-up current (<=20µA), cycle by cycle current limit
• Input voltage feed-forward compensation
• Wide supply voltage range from 12V to 25V, junction temperature range from -40°C to 125°C
• Totem pole gate driver with 600mA/-800mA
• Maximum frequency clamping (120KHz), DCM THD optimization
• Fast dynamic response, light load burst mode operation, disable function
• Maximum/minimum on-time limit
• Input undervoltage lockout, output overvoltage and undervoltage protection