UCC3819ADRG4

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mode:	Average Current
Frequency - Switching:	250kHz
Current - Startup:	150µA
Voltage - Supply:	10.8 V ~ 17 V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	UCC3819A

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Introduction

The UCC3819ADRG4 is a PFC (Power Factor Correction) used in PMIC (Power Management Integrated Circuit). It is essentially a complete system-level feature and solution for regulating the line or load current harmonics to maintain the desired power quality. It essentially works by optimizing the mains AC voltage input to any DC/DC, AC/DC or flyback power supply to make sure it performs optimally and utilization is not compromised due to lack of synchronization of the load and power source.

Application

The UCC3819ADRG4 is mainly used in consumer electronic environments such as TV, LED lighting and AV equipment, as well as medical and automotive applications. It is well suited for high-efficiency applications and can meet efficiency requirements of up to 95%. It is also capable of providing power factor levels greater than 0.7, required for meeting EN61000-3-2 harmonic emission requirements. It offers high-resolution current sensing and ON/OFF switching of the input voltage, thus allowing for tight EMI control.

Power Factor Correction

The UCC3819ADRG4 uses multiple control methods for power factor correction, including continuous conduction mode (CCM) and discontinuous conduction mode (DCM) operation. In CCM, the current waveform remains in a continuous conduction state, meaning that it does not recede to zero when the current waveform reaches zero. It is a very efficient method of regulating the current waveform of the input current, as it allows the maximum amount of power to be transmitted.In DCM, the current waveform recedes to zero when the current waveform reaches zero. This method of power factor correction is less efficient than CCM but it reduces ripple in the waveform and allows the user to control the waveform and frequency of the waveform more precisely. The UCC3819ADRG4 supports both CCM and DCM control, which can be selected as required.

Usage Examples

The UCC3819ADRG4 is ideally suited for medium- to high-power load applications, such as for automotive, energy metering and frequency converters. It has various applications, including flyback and forward converters, AC/DC, DC/DC and multi-output supplies. In automotive applications, it can be used for various functions, such as LED lighting and battery charging. It is also widely used in LED lighting and LED street lighting, due to its excellent EMI performance.

Conclusion

In conclusion, the UCC3819ADRG4 is a powerful PMIC that is widely used for power factor correction (PFC). It is highly competent with features and performance, and is well suited for a variety of applications, particularly in consumer electronics, automotive and LED lighting. It provides the essential features and functions to ensure the power quality is maintained and the optimal operation of the system is not compromised.

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