UCC28221 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.
UCC28221 Key Features
- 1 2-MHz High-Frequency Oscillator With 1-MHz Operation Per Channel
- Matched Internal Slope pensation Circuits
- Programmable Maximum Duty Cycle Clamp 60%
- Peak Current Mode Control With Cycle-by-Cycle
- Current Sense Discharge Transistor for Improved
- Accurate Line Undervoltage and Overvoltage
- Opto-Coupler Interface
- 110-V Internal Start-Up JFET (UCC28221)
- Operates From 12-V Supply (UCC28220)
- Programmable Soft Start
UCC28221 Applications
- High Output Current (50-A to 100-A) Converters