NCP1217P133G

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NCP1217P133G Application Field and Working Principle

NCP1217P133G is an AC/DC converter and offline switcher designed by ON Semiconductor that performs the conversion of an AC input voltage to a fixed DC output voltage. The device is used to supply power to many industrial and domestic applications such as home appliances, electronic toys, security alarms, access control systems, and more. The device mainly comprises of an input rectifier and an output voltage regulator, and it is capable of delivering up to 1A of output current at a regulated 3.3V output voltage. In addition, the device provides an enable pin which allows the user to shut down the device and disconnect the output from the input at any time.

Features of NCP1217P133G

The NCP1217P133G comes with several features which make it suitable for a wide range of applications and easy to use. Firstly, the device provides a wide input voltage range and can operate from 85V to 290V AC. Secondly, it has an auto-restart feature which, if enabled, restarts the device automatically after an overvoltage or short-circuit event. It also has an inrush current limiting feature that limits the current during the start-up and prevents any current surges. Furthermore, it provides up to 90% of efficiency and can handle up to 1A of output current without any significant power loss. On top of that, it has full protection from overvoltage and short circuit events and is fully RoHS compliant.

Working Principle of NCP1217P133G

The NCP1217P133G works on the principle of a linear power supply. It consists of an input rectifier and an output voltage regulator. The input voltage is first rectified and filtered, then it is regulated down to a fixed 3.3V with the help of a voltage regulator. The voltage regulating is done by a series of transistors and resistors connected in an appropriate configuration. The output is monitored and controlled by the integrated circuit to ensure that the output remains within the required range under varying input conditions.

Conclusion

NCP1217P133G is a highly efficient AC/DC converter and offline switcher designed for a variety of applications and environments. The device requires minimum external components, making it easy to use. In addition, it comes with an auto-restart feature, over-voltage protection, and inrush current limiting which make it highly reliable in operation. Therefore, this device is a great option for those looking for an efficient and reliable power solution.

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