NCP1217AD100R2

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• NCP1217AD100R2 Application Field and Working Principle

• PMIC - AC DC Converters, Offline Switchers

The NCP1217AD100R2 is an offline switcher from ON Semiconductor and popularly used in off-line power supply applications. It uses a 800 mW PFM control to deliver up to 100 watts of output power and works in the input voltage range of 90-265 Volts AC. Currently, the NCP1217AD100R2 is widely used in many types of electronic products and is an ideal solution for various applications, such as SMPS and lighting control power supply.

The NCP1217AD100R2 mainly includes the following components: the flyback transformer, diode bridge, capacitor, controller, and auxiliary components. Its working principle is simple: when the mains voltage exceeds the zener diode threshold, the controller turns on the switch (ignites the thyristor). Once the switch is turned on, current is transmitted to the primary winding of the flyback transformer, with exciting voltage generated on the flyback transformer’s secondary winding. Then the voltage generated by the flyback transformer secondary winding powers the AC DC converter, automatically regulating its output voltage and other parameters.

The NCP1217AD100R2 is equipped with many advantages, including high efficiency, excellent heat dissipation, low electromagnetic interference, and over-temperature protection. Besides, It also features a wide input voltage range of 90-265 VAC, low startup current and overload protection. Furthermore, no external compensation components are required. It also employs a single chip PFM controller, as well as a soft-start circuitry and active PFC circuitry for improved performance, energy saving, and power supply safety.

In addition, the NCP1217AD100R2 has a wide operating temperature range from -25 degree Celsius to 85 degree Celsius and also adopts a compact package with excellent space-saving. In short, the NCP1217AD100R2 is a perfect choice for an off-line power consumption application and is suitable for a lot of applications that demand high wattage performance without compromising the shape and size factor.

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