The UCC28881DR 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. UCC28881DR is the same family device of UCC28880, with higher current handling capability.
The low quiescent current of the device enables excellent efficiency. With the UCC28881DR the most common converter topologies, such as buck, buck-boost and flyback can be built using a minimum number of external components.
The UCC28881DR incorporates a soft-start feature for controlled start up of the power stage which minimizes the stress on the power-stage components.
Feature
- 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
