PTKM250-50

Fixed Inductors

PTKM250-50 Application Field and Working Principle

PTKM250-50 is a two-terminal device that is mainly used as an inductor or an electronic component. It is typically suited for applications when requiring an inductor having low power loss, a good frequency characteristic, and a large switching current. It has a high self-resonant frequency, an ultra-high Q de-rating curve, and a good temperature coefficient.

Application Field of PTKM250-50

PTKM250-50 is mainly used in automotive electronics, LED lighting, battery management systems, consumer and communication products, instrumentation, and power supplies. It can also be used for various switching applications, to reduce noise, to transport high-frequency signals, and to filter or supply power.

In the automotive field, PTKM250-50 can be used for power-on ignition, starter motors, regulators, electronic fuel injection (EFI) systems, power steering, and engine control modules. It can also be used for power distribution, control systems, and driver amplification. In LED lighting applications, it can be used for LED driver transformers, power supplies, and ripple reduction.

In power supplies, PTKM250-50 can be used for power factor correction, output voltage sensing, and transformer-magnet power supplies. In consumer and communication products, it can be used for wireless power transmission, cell phones, tablets, game consoles, and consumer audio/video products.

Working Principle of PTKM250-50

PTKM250-50 is based on the fundamental principle of electromagnetic induction, where an electric current generates a magnetic field, and a changing magnetic field generates an electric current. The use of this principle enables PTKM250-50 to act as an inductor.

PTKM250-50 consists of a sealed metal case, an insulated winding coil and a core. When an alternating current (AC) passes through the winding coil, a small magnetic field is generated. As a result, a reactive AC voltage (Vr) is induced in the winding coil. This voltage influences the current passing through the inductor, and is the key parameter when selecting the inductance value for the application.

PTKM250-50 is a self-resonant device, meaning that as the applied AC frequency increases, the peak of the inductor’s impedance increases, which reduces the total power loss during operation. Due to its good self-resonant frequency, PTKM250-50 is well-suited for high-frequency applications, such as MHz-level applications for switching power supplies.

Conclusion

PTKM250-50 is a two-terminal device mainly used as a fixed inductor in various electronic applications. It has a high self-resonant frequency, an ultra-high Q de-rating curve, and a good temperature coefficient. Typical applications include automotive electronics, LED lighting, battery management systems, consumer and communication products, instrumentation, and power supplies. The working principle of PTKM250-50 is based on the fundamental principle of electromagnetic induction.