FAN4802NY

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Mode:	Average Current
Frequency - Switching:	64kHz
Current - Startup:	30µA
Voltage - Supply:	11 V ~ 22 V
Operating Temperature:	-40°C ~ 105°C
Mounting Type:	Through Hole
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-DIP
Base Part Number:	FAN4802

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Power factor correction (PFC) is an essential component of modern power distribution systems, and the FAN4802NY (FN422Y) is an innovative solution for power factor correction applications. In this article, we will discuss the application fields and working principle of the FAN4802NY, as well as its advantages and drawbacks.The FAN4802NY is a state-of-the-art, active power factor correction (PFC) controller designed for single-phase AC-DC power supplies. The device incorporates a current controlled boost converter with power factor correction (PFC) and a variable frequency/duty cycle control for improved efficiency. The FAN4802NY is an excellent choice for applications where high efficiency and power factor correction are required, such as power supplies, appliances, and other power management systems.To provide power factor correction, the FAN4802NY uses a voltage control loop. When the AC supply voltage falls below the set voltage, the voltage controller detects the change and sends a signal to the power switch which turns on. With the power switch on, the boost converter stores energy in the output inductor and capacitor. When the boost converter reach a steady state, the controller starts to modulate the power switch via the PFC loop. This loop controls both the input current and the output voltage of the converter. The controller also detects the supply voltage and adjusts the power switch duty cycle for proper PFC operation.The FAN4802NY also features an over current protection (OCP) circuit that protects against over-current conditions in the output circuit. The OCP circuit senses the current and turns off the power switch if the current exceeds the pre-defined threshold. Moreover, the controller includes a thermal protection circuit (TPC) that prevents the chip overheating due to excessive power dissipation.The FAN4802NY offers a number of advantages in power factor correction applications. First, it is very simple to operate. The controller does not require any programming or special skills for its set-up and configuration. Moreover, the device is highly efficient, with a high power factor (over 0.97) which reduces the electricity bill and decreases energy losses. Finally, the FAN4802NY is cost-effective, as it provides better power factor correction than traditional PFC schemes at lower cost.However, the FAN4802NY also has some drawbacks. For example, the device only supports boost converter-based PFC, and does not support buck converter-based PFC. Additionally, the controller can be complicated to program, and requires specific software tools. Finally, its thermal protection circuit prevents it from dissipating excessive heat, but can limit the total power that can be delivered by the device.In conclusion, the FAN4802NY is an excellent solution for single-phase AC-DC power supplies requiring power factor correction. Its highly efficient, cost-effective design, and simple operation make the FAN4802NY an ideal choice for a variety of applications. The device is also protected against over-current and overheating conditions, making it reliable and safe to use.

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