High Voltage Switcher for Non-isolated AC/DC Conversion

High Voltage Switcher for Non-isolated AC/DC Conversion - UCC28880


The UCC28880 integrates the controller and a 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.

The low quiescent current of the device enables excellent efficiency. With the UCC28880 the most common converter topologies, such as buck, buck-boost and flyback can be built using a minimum number of external components.

The UCC28880 incorporates a soft-start feature for controlled start up of the power stage which minimizes the stress on the power-stage components.


  • Integrated Power MOSFET (Switch) Rated to
    700-V Drain-to-Source Voltage
  • Integrated High-Voltage Current Source for Internal Low-Voltage Supply Generation
  • 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 Performance with Inductor Current Runaway Prevention
  • Thermal Shutdown
  • Protection
    • Current Limit
    • Overload and Output Short Circuit

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Parametrics Compare all products in Offline Converter

Control Method
Output Power 85-265Vac (Max) (W)
Output Power 175-265Vac (Max) (W)
Vin (Min) (V)
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Operating Temperature Range (C)
Package Size: mm2:W x L (PKG)
UCC28880 UCC28881 UCC28910 UCC28911
Current    Current    Current    Current   
3    4.5    7.5    10   
4    6    9.5    12   
30    30    30    30   
Buck    Buck    Buck
55    55    99    99   
62    62    115    115   
3.9/3.6    3.9/3.6    9.5/6.5    9.5/6.5   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
Catalog    Catalog    Catalog    Catalog   
7SOIC: 29 mm2: 6 x 4.9(SOIC)    7SOIC: 29 mm2: 6 x 4.9(SOIC)    7SOIC: 29 mm2: 6 x 4.9(SOIC)    7SOIC: 29 mm2: 6 x 4.9(SOIC)   

WEBENCH® Designer UCC28880

 AC  DC  
AC Frequency  60 Hz  50 Hz
  Min   Max Range
VinRMS  V 30.00 to 425.00V
Vout  V 1.02 to 25.0V
Iout  A ≤ 0.1A
Ambient Temp  °C -40 to 125°C
Product Option