UCC2818DWTRG4

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mode:	Average Current
Frequency - Switching:	6kHz ~ 220kHz
Current - Startup:	150µA
Voltage - Supply:	12 V ~ 17 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	UCC2818

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UCC2818DWTRG4 Application Field and Working Principle

The UCC2818DWTRG4 is a low quiescent power consumption, low noise, continuous conduction mode PFC controller that supports a wide range of supply voltages from 15Vdc to 450Vdc. With low EMI and high efficiency, it is ideal for power supplies requiring both active PFC controllers and low standby power. The UCC2818DWTRG4 is an example of Power Factor Correction (PFC) controllers, which are an important part of the electrical energy conversion process.PFC controllers are used in electrical power systems to improve the power factor of the system by using a control strategy to reduce current distortions. This is done by controlling the input current waveform to match the voltage waveform. Generally, a passive PFC controller is used when the output is small, whereas an active PFC controller is employed for higher output values.The UCC2818DWTRG4 is an active PFC controller and is designed to operate without the need for large storage capacitors or inductors. It enables universal input voltage range and implementation of chargers, SMPS and PFC converters. It supports PFC control techniques such as fixed frequency peak current mode control, valley current limit control, and valley current minimum control.The UCC2818DWTRG4 works by measuring the output power and determining the current waveform. A reference voltage and a current feedback loop are used to control the switching of the power stage to match the current waveform. The controller monitors and regulates the input current by comparing the input current phase with the output voltage phase. When a phase difference is detected, the controller adjusts the switching of the PFC stage to either increase or decrease the current accordingly.The UCC2818DWTRG4 is a constant current mode controller which reduces system power components. It also provides protection against under and over voltage, over current and over temperature conditions. In addition, the controller is equipped with a current sensing system for improved reliability and accuracy.The UCC2818DWTRG4 is an ideal solution for power supplies requiring an active PFC controller and low standby power with improved EMI performance. It allows for easy implementation of hardware and firmware that are integrated into the controller to reduce power components and cost. The use of this controller ensures energy efficiency, optimal performance and reliable performance.

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