UCC28881 700-V Lowest Quiescent Current Off-Line Switcher | TI.com

UCC28881
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700-V Lowest Quiescent Current Off-Line Switcher

 

Description

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.

Features

  • 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

WEBENCH ® Designer UCC28881

 AC  DC  
AC Frequency  60 Hz  50 Hz
Topology Option
  Min   Max Range
VinRMS -  V 24.00 to 400.00V
Vout  V 3.0 to 24.0V
Iout  A ≤ 0.225A
Ambient Temp   °C -40 to 125 °C

Parametrics

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Part number Order Control method Output power 85-265 Vac (Max) (W) Output power 175-265 Vac (Max) (W) Vin (Min) (V) Topology Duty cycle (Max) (%) Frequency (Max) (kHz) UVLO thresholds on/off (V) Operating temperature range (C) Package size: mm2:W x L (PKG)
UCC28881 Order now Current     4.5     6     30     Buck     55     62     3.9/3.6     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28880 Order now Current     3     4     30     Buck     55     62     3.9/3.6     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28910 Order now Current     7.5     9.5     30     Buck
Flyback    
99     115     9.5/6.5     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28911 Order now Current     10     12     30     Buck
Flyback    
99     115     9.5/6.5     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)