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UCC28881

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700-V Lowest Quiescent current off-line switcher

Product details

Control mode Voltage UVLO thresholds on/off (V) 3.9/3.6 Duty cycle (max) (%) 55 Switching frequency (max) (kHz) 62 Features Current limiting, Green mode, High voltage startup, High-voltage startup, Integrated Switch, Leading edge blanking, Light load efficiency, Light-load efficiency, Low power, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog Device type Controllers Topology Buck, Buck boost, Buck-Boost, Flyback
Control mode Voltage UVLO thresholds on/off (V) 3.9/3.6 Duty cycle (max) (%) 55 Switching frequency (max) (kHz) 62 Features Current limiting, Green mode, High voltage startup, High-voltage startup, Integrated Switch, Leading edge blanking, Light load efficiency, Light-load efficiency, Low power, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog Device type Controllers Topology Buck, Buck boost, Buck-Boost, Flyback
SOIC (D) 7 29.4 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.

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Technical documentation

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Type Title Date
* Data sheet UCC28881 700-V, 225-mA Low Quiescent Current Off-Line Converter datasheet (Rev. B) PDF | HTML 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 PDF | HTML 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 PDF | HTML 23 Aug 2017
Application note UCC28880, UCC28881 Audible Noise Reduction Techniques 23 Mar 2017
Technical article Powering the IoT PDF | HTML 26 Jan 2017
EVM User's guide Using the UCC28881EVM-680 (Rev. A) 08 Dec 2015
Technical article Power Tips: Design considerations of high-voltage converters in a cascode MOSFET PDF | HTML 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.

User guide: PDF
Not available on TI.com
Simulation model

UCC28881 PSpice Transient Model

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

SLUC626 UCC28881 Design Calculator

Supported products & hardware

Supported products & hardware

Products
Flyback controllers
UCC28881 700-V Lowest Quiescent current off-line switcher

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SOIC (D) 7 View options

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