UC3855BN

Series:	--
Packaging:	Tube
Part Status:	Active
Mode:	Average Current
Frequency - Switching:	500kHz
Current - Startup:	150µA
Voltage - Supply:	10.5 V ~ 20 V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Through Hole
Package / Case:	20-DIP (0.300", 7.62mm)
Supplier Device Package:	20-PDIP
Base Part Number:	UC3855B

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UC3855BN Application Field and Working Principle of PMIC - PFC (Power Factor Correction):PMIC or Power Management Integrated Circuit (PMIC) is an integrated circuit containing several power management components. PMICs are widely used in consumer electronics to regulate voltage, control power and improve the efficiency of devices. Another type of PMIC is the PFC (Power Factor Correction) which is used for improved power management.The UC3855BN is the modern component in the PFC family that offers high efficiency and enhanced performance. It is a low power, low cost IC that provides a single-phase active power factor correction for switching power supplies, as well as monitoring and protection functions. The UC3855BN offers better EMI performance and higher power conversion efficiency than other similar products.The UC3855BN component is used to provide single-phase AC power factor correction in the range of 115V to 265V, up to a maximum of 400mA output current. The component features a soft start, pre-bias and overload protection functions, as well as an input overvoltage protection circuit. The component also features a low power start-up circuit, an under voltage and over current protection, and a power save mode.The UC3855BN component is idea for a variety of applications including residential, commercial and industrial areas. It can be used in a wide range of products such as LED lighting, LED signage, LED display, and smart home appliances. The component is also used in a variety of power conversion systems for office equipment and automotive applications.The working principle of the UC3855BN depends on the switching action of the component’s internal FETs. The component contains an advanced control circuit consisting of an error amplifier, an internal regulator, and a phase corrector. The error amplifier compares the output voltage with a reference voltage and produces an output error signal. The internal regulator then uses this signal to regulate the output voltage and current. The phase corrector receives a signal from the error amplifier to control the output power 180 degrees out of phase.The UC3855BN component also features a programmable overshoot voltage protection circuit. This ensures that the output voltage does not exceed the overshoot voltage and prevents possible destruction of the component.The UC3855BN component is a low cost, energy-efficient device that provides a high level of power management. Its versatile feature set, extremely low power consumption and pre-bias protection make it suitable for a wide range of applications. Its ability to help in reducing harmonic distortion, its low power requirements, and its advanced protection features make it an ideal choice for applications requiring single-phase active power factor correction.

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