1 Features

• 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

• Create a Custom Design Using the UCC28880

with the WEBENCH Power Designer

2 Applications

• AC-to-DC Power Supplies

(Output Current Up to 100 mA for CCM;

70 mA for DCM)

• Metering, Home Automation, Infrastructure SMPS

• Low-Side Buck Topology for TRIAC Driver

• Appliances, White Goods and LED Drivers

3 Description

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, buckboost

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.