●DESCRIPTION
●The UCC28510 series of combination PFC/PWM controllers provide complete control functionality for any off-line power system requiring compliance with the EC1000−3−2 harmonic
●reduction requirements. By combining the control and drive signals for the PFC and the PWM stages into a single device, significant performance and cost benefits are gained. By managing the modulation mechanisms of the two stages (leading-edge modulation for PFC and
●trailing-edge modulation for PWM), the ripple current in the boost capacitor is minimized.
●FEATURES
●Provides Control of PFC and PWM Power
●Stages In One Device
●Leading-Edge PFC, Trailing-Edge PWM
●Modulation for Reduced Ripple
●Built-In Sequencing of PFC and PWM
●Turn-On
●2-A Source and 3-A Sink Gate Drive for Both
●PFC and PWM Stages
●Typical 16-ns Rise Time and 7-ns Fall Time
●into 1-nF Loads
●PFC Features
●− Average-Current-Mode Control for
●Continuous Conduction Mode Operation
●− Highly-Linear Multiplier for Near-Unity
●Power Factor
●− Input Voltage Feedforward Implementation
●− Improved Load Transient Response
●− Accurate Power Limiting
●− Zero Power Detect
●PWM Features
●− Peak-Current-Mode Control Operation
●− 1:1 or 1:2 PFC:PWM Frequency Options
●− Programmable maximum duty cycle
●− Programmable Soft-Start
●− Two Hysteresis Options for Differing
●Hold-Up Time Requirements
