UCC28220PWR
与可编程最大占空比双路交错PWM控制器 INTERLEAVED DUAL PWM CONTROLLER WITH PROGRAMMABLE MAX DUTY CYCLE
DESCRIPON
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
