Product details

Control mode Voltage mode Frequency (Max) (kHz) 62 UVLO thresholds on/off (V) 3.9/3.6 Duty cycle (Max) (%) 55 Features Low Power, Light Load Efficiency, Current Limiting, Integrated Switch, HV Start-up, Thermal Shutdown, Green Mode, Leading Edge Blanking, Soft Start Operating temperature range (C) -40 to 125 Rating Catalog Device type Controllers Topology Buck, Buck-Boost, Flyback
Control mode Voltage mode Frequency (Max) (kHz) 62 UVLO thresholds on/off (V) 3.9/3.6 Duty cycle (Max) (%) 55 Features Low Power, Light Load Efficiency, Current Limiting, Integrated Switch, HV Start-up, Thermal Shutdown, Green Mode, Leading Edge Blanking, Soft Start Operating temperature range (C) -40 to 125 Rating Catalog Device type Controllers Topology Buck, Buck-Boost, Flyback
SOIC (D) 7 29 mm² 4.9 x 6
  • Integrated 14-Ω, 700-V Power MOSFET
  • Integrated High-Voltage Current Source for Internal Device Bias Power
  • Integrated Current Sense
  • Internal Soft Start
  • Self-Biased Switcher (Start Up and Operation Directly from Rectified Mains Voltage)
  • Supports Buck, Buck-Boost and Flyback Topologies
  • <100-μA Device Quiescent Current
  • Robust Current Protection During Load Short Circuit
  • Protection
    • Current Limit
    • Overload and Output Short Circuit
    • Over Temperature
  • Integrated 14-Ω, 700-V Power MOSFET
  • Integrated High-Voltage Current Source for Internal Device Bias Power
  • Integrated Current Sense
  • Internal Soft Start
  • Self-Biased Switcher (Start Up and Operation Directly from Rectified Mains Voltage)
  • Supports Buck, Buck-Boost and Flyback Topologies
  • <100-μA Device Quiescent Current
  • Robust Current Protection During Load Short Circuit
  • Protection
    • Current Limit
    • Overload and Output Short Circuit
    • Over Temperature

The UCC28881 integrates the controller and a 14-Ω, 700-V power MOSFET into one monolithic device. The device also integrates a high-voltage current source, enabling start up and operation directly from the rectified mains voltage. UCC28881 is the same family device of UCC28880, with higher current handling capability.

The low quiescent current of the device enables excellent efficiency. With the UCC28881 the most common converter topologies, such as buck, buck-boost and flyback can be built using a minimum number of external components.

The UCC28881 incorporates a soft-start feature for controlled start up of the power stage which minimizes the stress on the power-stage components.

The UCC28881 integrates the controller and a 14-Ω, 700-V power MOSFET into one monolithic device. The device also integrates a high-voltage current source, enabling start up and operation directly from the rectified mains voltage. UCC28881 is the same family device of UCC28880, with higher current handling capability.

The low quiescent current of the device enables excellent efficiency. With the UCC28881 the most common converter topologies, such as buck, buck-boost and flyback can be built using a minimum number of external components.

The UCC28881 incorporates a soft-start feature for controlled start up of the power stage which minimizes the stress on the power-stage components.

Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 9
Type Title Date
* Data sheet UCC28881 700-V, 225-mA Low Quiescent Current Off-Line Converter datasheet (Rev. B) 11 Jan 2016
Application note Operating UCC2888x Offline Buck in Saturation for Cost Reduction 22 Jun 2018
Technical article How to build a cost-competitive and robust auxiliary power supply 01 Feb 2018
Application note UCC2888x Diode Selection When Configured as High Side Buck 20 Nov 2017
Technical article Unique techniques to increase controller power 23 Aug 2017
Application note UCC28880, UCC28881 Audible Noise Reduction Techniques 23 Mar 2017
Technical article Powering the IoT 26 Jan 2017
User guide Using the UCC28881EVM-680 (Rev. A) 08 Dec 2015
Technical article Power Tips: Design considerations of high-voltage converters in a cascode MOSFET 03 Nov 2015

Design & development

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

Evaluation board

UCC28881EVM-680 — UCC28881 Offline High-Side Buck Converter Evaluation Module

The UCC28881EVM-680 evaluation module (EVM) is an offline high-voltage buck-type power supply that provides 13 VDC at a maximum output of 225 mA. The input accepts a voltage range of 85 VAC to 265 VAC.

In stock
Limit: 3
Simulation model

UCC28881 PSpice Transient Model

SLUM501.ZIP (130 KB) - PSpice Model
Calculation tool

UCC28881 Design Calculator (Rev. B)

SLUC626B.ZIP (174 KB)
Many TI reference designs include the UCC28881

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

Package Pins Download
SOIC (D) 7 View options

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

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

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