CDH38D11SLDNP-1R9MC

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Fixed inductors are electrical components used to store energy in an electrical field. Commonly used for filtering, in radio frequency applications, and common mode EMI suppression, they are also sometimes called chokes or inductors. Fixed inductors are characterized by their inductance, which can range from over 1000uH (ultra Henrys) to 0.001uH for a tiny chip inductor. The CDH38D11SLDNP-1R9MC is a fixed inductor made by Panasonic. Its distinct qualities, application field and working principle, make it suitable for a variety of applications.

Construction

The CDH38D11SLDNP-1R9MC Fixed Inductor is a surface mount device, consists out of a ceramic inner core, copper wire windings, and a plastic casing. The core is a mix of aluminum and zinc oxide, sometimes with a barium titanate elements added to improve magnetic characteristics. Both the core and the winding are coated with a protective electrically insulating varnish. The design is very compact, allowing for a relatively large inductance in a small package. Finally, the inductor is encapsulated in a flame retardant resin, providing environmental and mechanical protection.

Inductance

Inductance is the primary electrical property of inductors, and is defined as the amount of energy that is stored in the magnetic field. It is measured in Henrys (H). The Panasonic CDH38D11SLDNP-1R9MCinductance range is from 0.5uH to 8.2uH, and its working frequency range is up to 4MHz.

Specifications

The CDH38D11SLDNP-1R9MC Fixed Inductor features a low DC resistance of up to 70 mOHM, a rated current of up to 3.5A and a low equivalent series resistance (ESR). It is rated to operate with temperatures between -40 °C and +105 °C, and has a dielectric strength of up to 960v. The inductor can tolerate up to +4V of reverse voltage.

Applications

The CDH38D11SLDNP-1R9MC Fixed Inductor, due to its low DC resistance, high power rating, low ESR and wide operating temperature range, is well suited for a wide range of applications. It can be used in power supply designs, output filtering, and for DC-to-DC converters. It is also popular for use in common mode EMI suppression, buck/boost converters, and high-current PFCs. Due to its small size, it can also be used in portable electronic devices, such as smartphones, tablets, and battery powered equipment.

Working Principle

Principally, fixed inductors work by producing a magnetic field in response to an AC current. This magnetic field stores energy, that is released when the current is reduced. This behavior is due to Faraday\'s law, which stipulates that a changing magnetic field creates an electric field. To produce a large magnetic field in a small space, fixed inductors employs its copper winding; the more windings, the greater the magnetic field. Transition from one electric state to another demands an energy conversion, and inductors are used to create this conversion from AC to DC.

Conclusion

The CDH38D11SLDNP-1R9MC Fixed Inductor can be referred as a high quality, reliable electrical component for a variety of applications. It features a low DC resistance, high power rating, low ESR, and a wide operating temperature range, making it suitable for all sorts of power supply designs, output filtering, and DC-to-DC converters. The inductor’s small size and reliability make it an ideal choice for portable devices, such as smartphones, tablets, and battery powered equipment.

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