UCC28881
- 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.
Technical documentation
| 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.
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.
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 | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (D) | 7 | Ultra Librarian |
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