UCC28881 Texas instruments

UCC28881

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UCC28881

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Описание

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.

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

Vin (min) (V)	36
Vin (max) (V)	450
Vout (min) (V)	5
Vout (max) (V)	60
Iout (max) (A)	0.225
Iq (typ) (mA)	0.01
Switching frequency (max) (kHz)	62
Features	Current limiting, Green mode, High-voltage startup, Integrated Switch, Leading edge blanking, Light-load efficiency, Low power, Soft start, Thermal shutdown
Operating temperature range (°C)	-40 to 125
Rating	Catalog
Control mode	Voltage
Duty cycle (max) (%)	55