L4981AD013TR Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Mode:	Average Current
Frequency - Switching:	100kHz
Current - Startup:	100µA
Voltage - Supply:	14.5 V ~ 19.5V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	20-SO
Base Part Number:	L4981A

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Power Factor Correction (PFC) is one of the most important power management techniques in modern electronics. It is designed to increase the efficiency of electrical systems by ensuring power is transferred from the source to the load in an optimized manner. The L4981AD013TR is a power factor correction integrated circuit designed specifically to improve power factor and reduce power consumption in power systems.The L4981AD013TR is a flyback PFC controller that enables low-cost and high efficiency power systems. It is designed for buck, boost or flyback topology applications and is especially suited for use in consumer and industrial applications such as television and PC display adapters, internet access equipment, lighting controls, solar power systems, HVAC control systems, UPSs, medical equipment and smoke detector systems.The L4981AD013TR has a number of features and benefits designed to make it the ideal choice for use in PFC applications. It has high operating efficiency, low start-up and operating current, wide input voltage range, and programmable cycle-by-cycle current limiting. It also features under-voltage lockout (UVLO) for protection against brownouts, as well as an on-chip voltage regulator for protections against over-voltage and over-temperature conditions.The primary working principle of the L4981AD013TR is that it increases the power factor by using two distinct stages of power conversion. Firstly, it rectifies the incoming AC power and then it converts the rectified voltage into a DC voltage using a boost or flyback converter. This helps improve power factor by reducing harmonic distortion.The integrated circuit is programmable, allowing the user to easily set up the system parameters like output voltage and peak current limit. It is also capable of sensing the output voltage and current, and automatically adjusting them to maintain the desired levels.In addition to providing power factor correction, the integrated circuit also helps reduce energy losses and maximizes efficiency by providing short-circuit protection, thermal shutdown, and overvoltage protection. It also supports ultra low standby power and can control varying input voltages smoothly with the help of its adaptive frequency control feature.Overall, the L4981AD013TR is an excellent choice for power factor correction (PFC) applications. Its wide range of features, including adjustable parameters, programmable settings, voltage regulation, and power-saving capabilities, makes it ideal for a variety of uses in modern electronic systems.

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