UCC28221

ACTIVE

Automotive Dual Interleaved 2MHz PWM controller with Programmable max duty cycle 13V/8V UVLO

Product details

Vin (max) (V) 14.5 Operating temperature range (°C) -40 to 105 Control mode Current Topology Flyback, Forward Rating Catalog Features Adjustable switching frequency, Current limiting, High-voltage startup, Input line monitor, Multi-topology, Programmable max duty cycle, Programmable slope compensation, Soft start Duty cycle (max) (%) 90
Vin (max) (V) 14.5 Operating temperature range (°C) -40 to 105 Control mode Current Topology Flyback, Forward Rating Catalog Features Adjustable switching frequency, Current limiting, High-voltage startup, Input line monitor, Multi-topology, Programmable max duty cycle, Programmable slope compensation, Soft start Duty cycle (max) (%) 90
SOIC (D) 16 59.4 mm² 9.9 x 6 TSSOP (PW) 20 41.6 mm² 6.5 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 200-W Interleaved Forward Converter Design Review Using TI's UCC28221 PWM Contro 19 Apr 2004
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

SLUC046 UCC28221 Application Design Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
UCC28221 Automotive Dual Interleaved 2MHz PWM controller with Programmable max duty cycle 13V/8V UVLO
Software
Calculation tool
UCC28221-CALC UCC28221 MathCAD Calculation Utility
Calculation tool

UCC28221-CALC — UCC28221 MathCAD Calculation Utility

This Mathcad design tool was developed to use with the UCC28221 application note SLUA312.
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 16 Ultra Librarian
TSSOP (PW) 20 Ultra Librarian

Ordering & quality

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