UCC28221PW Datasheet PDF - TI

●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