SL22 14007

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Inrush current limiters (ICLs ) are vital components in various types of electronic equipment due to their ability to help regulate the flow of inrush current which can cause excessive power consumption or equipment damage. They are found in consumer electronics, telecommunications, and other electrical systems where the need to control high inrush current is an essential factor. The SL2214007 is one such example of an ICL and this article will discuss its application field and working principles.

Application Field

The SL2214007 ICL is mainly applied in AC-DC power supplies, such as those found in chargers, medical devices, power banks, rectifiers, and triacs. It is used to limit the inrush current to avoid damage to electronic components and circuits due to the high current. Limiting the inrush current helps to ensure the power supply\'s efficiency and safety for its purpose.

Working Principle

The SL2214007 ICL consists of a semiconductor PTC switch, suppressor diode, resistor, and capacitor. The PTC switch is set up as a normally-closed circuit with the diode and capacitor acting as switches. When the input power supply is connected to the ICL, the PTC switch will initially close, allowing current to pass through the circuit. As the current increases, the temperature of the PTC switch will increase as well, eventually reaching its thermal shutdown temperature. At this point, the PTC switch will open, cutting off the current and preventing further current from passing through the ICL. Once the current passes through the resistor, it will charge the capacitor which will then open the diode, allowing the current to pass back into the input power supply. This will complete the cycle, and the ICL will remain in this state until the current drops and the PTC switch closes again, allowing the current to pass through the ICL.

Conclusion

The SL2214007 ICL is an important component for various types of electronic equipment due to its ability to regulate the flow of inrush current, which can cause excessive power consumption or equipment damage. It is mainly used in AC-DC power supplies for limiting the inrush current to ensure the safety and efficiency of the power supply. The ICL consists of a semiconductor PTC switch, suppressor diode, resistor, and capacitor, and operates by initially allowing current to pass through the circuit until the PTC switch reaches its thermal shutdown temperature, at which point it opens and the current passes back into the input power supply through the resistor, diode, and capacitor.

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