DESCRIPTION FEATURES Integrated Transition Mode (TM) PFC Controller OB6663 integrates a transition mode power factor and Quasi-Resonant (QR) PWM Controller correction (TM PFC) controller and a Quasi- Built-in Dual Output PFC Control Resonant (QR) controller in one chip. TM PFC Multi-Mode Operation for QR Stage provides a cost effective solution for optimizing the Adjustable PFC Go-to-Standby Power Level power factor of 75W+ off line SMPS. QR provides Analog Multiplier with Built-in THD Optimizer higher efficiency and lower EMI compared to for PFC Stage conventional PWM system. Line Feed-forward Compensation for PFC Stage OB6663 provides high level integration and high Enhanced Dynamic Response for PFC Stage performance than conventional PFC/PWM system. Less than 300mW Standby Power Consumption The built-in dual output control for TM PFC Minimum QR Short Circuit Power Consumption optimizes power conversion efficiency with reduced Audio Noise Free Operation system cost. Separate analog ground (AGND) and power g