Features
■ Line-modulated fixed-off-time (LM-FOT) control of CCM-operated PFC pre-regulators
■ Proprietary LM-FOT modulator for nearly fixed- frequency operation
■ Proprietary multiplier design for minimum THD of AC input current
■ Fast “bi-directional” input voltage feedforward (1/V2 correction)
■ Accurate adjustable output overvoltage protection
■ Protection against feedback loop failure (latched shutdown)
■ Inductor saturation protection
■ AC brownout detection
■ Digital leading-edge blanking on current sense
■ Soft-start
■ 1% (at Tj = 25 °C) internal reference voltage
■ 600 / + 800 mA totem pole gate driver with active pull-down during UVLO and voltage clamp
■ SSOP10 package

Applications
■ PFC pre-regulators for: – IEC61000-3-2 and JEIDA-MITI compliant SMPS in excess of 1 KW – Desktop PC, server, web server SSOP10