( File format: PDF, 618 KB )
UCC28220/1 Dual Interleaved PWM Controller (Rev. C)
Texas Instruments
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. UCC28220 has UVLO turn-on threshold of 10 V for use in 12-V supplies while UCC28221 has turn-on threshold of 13 V for systems needing wider UVLO hysteresis. Both have 8-V turn-off thresholds. Additional features include a programmable internal slope compensation with a special circuit which is used to ensure exactly the same slope is added to each channel and a high voltage 110-V internal JFET for easier startup for the wider hysteresis UCC28221 version. The UCC28220 is available in both 16-pin SOIC and low-profile TSSOP packages. The UCC28221 also comes in 16-pin SOIC package and a slightly larger 20-pin TSSOP package to allow for high voltage pin spacing to meet UL1950 creepage clearance safety requirements.
Features
2-MHz High Frequency Oscillator With 1-MHz Operation Per Channel Matched Internal Slope Compensation 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 Density Designs High Efficiency 48-V Input With Low Output Ripple Converters High Power Offline, Telecom and Datacom Power Supplies
Related Datasheets
| Part Number | Description | Category |
| • UCC28220 | UCC28220/1 Dual Interleaved PWM Controller (Rev. C) | ICs, Interface |
As the hyperlinked contents/websites are those of third parties, we cannot vouch for their accuracy or legitimacy.
Hot Articles
Most Popular Articles
Search EE Times India
Max's Cool Beans
Strange modes of transport and other "stuff"
Someone just pointed me at a YouTube video that claims to show the world's first e-powered multicopter flight...
