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FSQ0365RN Application Field and Working Principle

The FSQ0365RN is a monolithic switching regulator power integrated circuit designed for AC/DC power conversion. It is a current mode, fixed frequency PWM (pulse width modulation) offline switcher IC (integrated circuit). By integrating a 700V power MOSFET, an oscillator and an error amplifier, the FSQ0365RN captures and processes AC voltage to continually provide a regulated DC voltage output, offering a simple and fast solution for AC/DC power conversion.

Applications for FSQ0365RN

The FSQ0365RN is ideal for applications that require a reliable, energy efficient and low cost solution for AC/DC power conversion. As the integrated circuit (IC) includes a 700V MOSFET and can operate at high frequencies, the FSQ0365RN can be used for various applications. Some of the applications the FSQ0365RN can be used for include:

• AC/DC battery chargers
• PC power supplies
• Home entertainment appliances
• Executive chargers
• LED lighting products
• DC motors
• Uninterruptible power supplies (UPS)

Working Principle of FSQ0365RN

The FSQ0365RN operates on the principle of regulating the duty cycle of a switch that is controlled by a fixed frequency PWM control current. The FSQ0365RN input will capture and process the AC input voltage to maintain an output voltage at a steady level.

Once the AC input voltage reaches a certain level, the FSQ0365RN will switch to the DC output and activate a power switch to turn on. When the output voltage reaches the desired level then the power switch will be turned off and the FSQ0365RN will switch back to the AC input voltage, repeating this cycling process continuously throughout the lifetime of the FSQ0365RN.

Once the power switch is turned on, current will flow through the built-in MOSFET and pass to the output. During this process, the current will be controlled by the internal oscillator and error amplifier, preventing any overshoots or oscillations, while also allowing for efficient power conversion. Additionally, the FSQ0365RN can be used with external components such as inductors, resistors and capacitors to further improve efficiency.

Conclusion

The FSQ0365RN is a monolithic switching regulator power integrated circuit designed for AC/DC power conversion. It is ideal for applications that require a reliable, energy efficient and low cost solution for AC/DC power conversion as it includes a 700V power MOSFET and can operate at high frequencies. The FSQ0365RN works by regulating the duty cycle of a switch controlled by a fixed frequency PWM control current and is able to use external components such as inductors, resistors and capacitors for further efficiency.

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