Home Power management AC/DC & DC/DC converters (integrated FET)
Home
Power management
AC/DC & DC/DC converters (integrated FET)

UCC28911

ACTIVE

700V Flyback switcher with constant-voltage constant-current and primary-side regulation

Order now
Data sheet

UCC28911

ACTIVE
Data sheet Order now

Product details

Iout (max) (A) 0.7 Vin (min) (V) 10 Vin (max) (V) 450 Topology Buck, Flyback Switching frequency (min) (kHz) 0.42 Switching frequency (max) (kHz) 115 Features Adjustable switching frequency, Current limiting, Green mode, High voltage startup, High-voltage startup, Input line monitor, Integrated Switch, IoT compatible, Leading edge blanking, Light load efficiency, Light-load efficiency, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown Control mode Current, Primary-side regulation, Voltage Vout (min) (V) 3.3 Vout (max) (V) 18 Rating Catalog Operating temperature range (°C) -40 to 125
Iout (max) (A) 0.7 Vin (min) (V) 10 Vin (max) (V) 450 Topology Buck, Flyback Switching frequency (min) (kHz) 0.42 Switching frequency (max) (kHz) 115 Features Adjustable switching frequency, Current limiting, Green mode, High voltage startup, High-voltage startup, Input line monitor, Integrated Switch, IoT compatible, Leading edge blanking, Light load efficiency, Light-load efficiency, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown Control mode Current, Primary-side regulation, Voltage Vout (min) (V) 3.3 Vout (max) (V) 18 Rating Catalog Operating temperature range (°C) -40 to 125
SOIC (D) 7 29.4 mm² 4.9 x 6
  • Constant-Voltage (CV) and Constant-Current (CC) Output Regulation Without Optical-Coupler
  • ±5% Output Voltage Regulation Accuracy
  • ±5% Output Current Regulation With AC Line and Primary Inductance Tolerance Compensation
  • 700-V Start-Up and Smart Power Management Enables <30-mW Standby Power
  • 115-kHz Maximum Switching Frequency Design for High-Power Density
  • Valley Switching and Frequency Dithering to Ease EMI Compliance
  • Thermal Shut Down
  • Low Line and Output Over-Voltage Protection
  • Constant-Voltage (CV) and Constant-Current (CC) Output Regulation Without Optical-Coupler
  • ±5% Output Voltage Regulation Accuracy
  • ±5% Output Current Regulation With AC Line and Primary Inductance Tolerance Compensation
  • 700-V Start-Up and Smart Power Management Enables <30-mW Standby Power
  • 115-kHz Maximum Switching Frequency Design for High-Power Density
  • Valley Switching and Frequency Dithering to Ease EMI Compliance
  • Thermal Shut Down
  • Low Line and Output Over-Voltage Protection

The UCC28910 and UCC28911 are high-voltage flyback switchers that provide output voltageand current regulation without the use of an optical coupler. Both devices incorporate a 700-Vpower FET and a controller that process operating information from the flyback auxiliary windingand power FET to provide a precise output voltage and current control. The integrated high-voltage current source for startup that is switched off during device operation, and the controller current consumption is dynamically adjusted with load. Both enablethe very low stand-by power consumption.

Control algorithms in the UCC28910 and UCC28911, combining switching frequency and peakprimary current modulation, allow operating efficiencies to meet or exceed applicable standards.Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses.Built-in protection features help to keep secondary and primary component stress levels in check across the operating range. The frequency jitter helps to reduce EMI filter

The UCC28910 and UCC28911 are high-voltage flyback switchers that provide output voltageand current regulation without the use of an optical coupler. Both devices incorporate a 700-Vpower FET and a controller that process operating information from the flyback auxiliary windingand power FET to provide a precise output voltage and current control. The integrated high-voltage current source for startup that is switched off during device operation, and the controller current consumption is dynamically adjusted with load. Both enablethe very low stand-by power consumption.

Control algorithms in the UCC28910 and UCC28911, combining switching frequency and peakprimary current modulation, allow operating efficiencies to meet or exceed applicable standards.Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses.Built-in protection features help to keep secondary and primary component stress levels in check across the operating range. The frequency jitter helps to reduce EMI filter
open-in-new Find other AC/DC & DC/DC converters (integrated FET)
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 12
Type Title Date
* Data sheet UCC28910, UCC28911 High-Voltage Flyback Switcher with Primary-Side Regulation and Output Current Control datasheet (Rev. D) PDF | HTML 19 Dec 2016
Application note Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips PDF | HTML 31 Aug 2021
Technical article Overcoming common design challenges in an UV sterilization box system PDF | HTML 27 Jul 2020
Technical article Making a solar inverter more reliable than the sun PDF | HTML 01 Aug 2017
Application note Troubleshooting TI PSR controllers 03 Oct 2016
Technical article Differences between PSR and SSR in bias power-supply design PDF | HTML 08 Apr 2016
Technical article Design an energy-efficient, lower-acoustic cooker hood with an elegant user interf PDF | HTML 29 Mar 2016
Technical article Power Tips: Power converter topology/component selections in high input voltage ap PDF | HTML 07 Oct 2015
White paper Control Challenges for Low Power AC/DC Converters 02 Oct 2015
White paper Control Challenges for Low Power AC/DC Converters (PPT) 02 Oct 2015
Technical article Designing multiple output converters with primary side sensing PDF | HTML 04 Aug 2015
EVM User's guide Using the UCC28911EVM-718 06 Mar 2015

Design & development

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

Evaluation board

UCC28911EVM-718 — UCC28911 Evaluation Module

The UCC28911EVM-718 evaluation module is an offline Flyback power supply that provides isolated output voltage and current regulation without the use of an optocoupler and secondary-side feedback components. The input accepts a voltage range of 85VAC to 265VAC, 47Hz to 64Hz. The evaluation module (...)

User guide: PDF
Not available on TI.com
Support software

PMP4367 — Universal AC Input 6W Adapter with Energy Star 6 Efficiency Rating

This 5V / 1.2A adapter solution is fully test and passes EMI and EMC (CE,RE) safety requirements. It implements a high efficiency primary side controller UCC28910. The efficiency of the design complies with Energy Star 6 and is designed to fit into small form factor housing. The design measures (...)
View options
Calculation tool

SLUC624 — UCC28911 Design Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
UCC28911 — 700V Flyback switcher with constant-voltage constant-current and primary-side regulation
Download

Many TI reference designs include the UCC28911

Use our reference design selection tool to review and identify designs that best match your application and parameters.

View reference designs
Package Pins Download
SOIC (D) 7 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos