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UCC28220

ACTIVE

Dual Interleaved PWM controller with Programmable max duty cycle 10V/8V UVLO

Product details

Topology Flyback, Forward Control mode Current Duty cycle (max) (%) 90 Switching frequency (max) (kHz) 2000 Features Adjustable switching frequency, Current limiting, Input line monitor, Multi-topology, Programmable max duty cycle, Programmable slope compensation, Soft start UVLO thresholds on/off (V) 10/8 Operating temperature range (°C) -40 to 105 Rating Catalog Gate drive (typ) (A) 0.01 Vin (max) (V) 14.5
Topology Flyback, Forward Control mode Current Duty cycle (max) (%) 90 Switching frequency (max) (kHz) 2000 Features Adjustable switching frequency, Current limiting, Input line monitor, Multi-topology, Programmable max duty cycle, Programmable slope compensation, Soft start UVLO thresholds on/off (V) 10/8 Operating temperature range (°C) -40 to 105 Rating Catalog Gate drive (typ) (A) 0.01 Vin (max) (V) 14.5
SOIC (D) 16 59.4 mm² 9.9 x 6 TSSOP (PW) 16 32 mm² 5 x 6.4
  • 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 Undervoltage and Overvoltage Sense With Programmable Hysteresis
  • Opto-Coupler Interface
  • 110-V Internal Start-Up JFET (UCC28221)
  • Operates From 12-V Supply (UCC28220)
  • Programmable Soft Start
  • 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 Undervoltage and Overvoltage Sense With Programmable Hysteresis
  • Opto-Coupler Interface
  • 110-V Internal Start-Up JFET (UCC28221)
  • Operates From 12-V Supply (UCC28220)
  • Programmable Soft Start

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.

The UCC28220 has an UVLO turnon threshold of
10 V for use in 12-V supplies while UCC28221 has a turnon threshold of 13 V for systems needing wider UVLO hysteresis. Both have 8-V turnoff 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 start-up 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.

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.

The UCC28220 has an UVLO turnon threshold of
10 V for use in 12-V supplies while UCC28221 has a turnon threshold of 13 V for systems needing wider UVLO hysteresis. Both have 8-V turnoff 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 start-up 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.

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Technical documentation

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Type Title Date
* Data sheet UCC2822x Interleaved Dual PWM Controller With Programmable Max Duty Cycle datasheet (Rev. G) PDF | HTML 06 Apr 2017
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note 350-W, Two Phase Interleaved PFC Pre-Regulator (Rev. C) 20 Sep 2013
User guide 350-W Interleaved PFC Pre-Regulator 29 Aug 2005
More literature Seminar 300 Topic 8 - Switching Power Supply Design Review 15 Feb 2001
More literature Seminar 400 Topic 2 - Design of Flyback Transformers and Filter Inductors 15 Feb 2001

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Calculation tool

UCC28221-CALC — UCC28221 MathCAD Calculation Utility

This Mathcad design tool was developed to use with the UCC28221 application note SLUA312.
Package Pins Download
SOIC (D) 16 View options
TSSOP (PW) 16 View options

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