DESCRIPTION
●The UCC28220 and UCC28221 are a family of BiCMOS interleaved dual channel PWM controllers. Peak current mode control is used to ensure current sharing between the two channels. A precise maximum duty cycle clamp can be set to any value between 60% and 90% duty cycle per channel.
●FEATURES
●• 2-MHz High Frequency Oscillator with 1-MHz Operation Per Channel
●• Matched Internal Slope Compensation Circuits
●• Programmable Maximum Duty Cycle Clamp 60% to 90% Per Channel
●• Peak Current Mode Control with Cycle-by-Cycle Current Limit
●• Current Sense Discharge Transistor for Improved Noise Immunity
●• Accurate Line Under and Over-Voltage Sense with Programmable Hysteresis
●• Opto-Coupler Interface
●• 110-V Internal Start-Up JFET (UCC28221)
●• Operates from 12-V Supply (UCC28220)
●• Programmable Soft-Start
●APPLICATIONS
●• High Output Current (50-A to 100-A) Converters
●• Maximum Power Density Designs
●• High Efficiency 48-V Input with Low Output Ripple Converters
●• High Power Offline, Telecom and Datacom Power Supplies
