Imagine your power supply devices inexplicably overheating, operating inefficiently, or frequently malfunctioning. The culprit might be the transformer's magnetic core. In high-frequency applications, the core's performance directly determines a power supply's efficiency and stability. Today we examine how selecting the right magnetic core can eliminate high-frequency losses and create high-performance transformers.

The EE25/13/7 PC44 ferrite core is specifically designed for high-frequency applications. Manufactured from premium PC44 ferrite material, it delivers exceptional magnetic properties that effectively reduce core losses during high-frequency operation while improving overall transformer efficiency. This core is particularly suitable for switch-mode power supplies (SMPS), inverters, high-frequency power converters, and other applications demanding exceptional efficiency and stability.

EE-type cores offer distinct design advantages. Compared to other core shapes, they provide greater winding space, facilitating coil winding while reducing complexity. More importantly, EE-type cores effectively minimize leakage inductance, thereby improving transformer coupling coefficients and enhancing energy transfer efficiency. These benefits become particularly evident in high-power, compact designs.

PC44 is a widely used ferrite material offering these key benefits:

• Low core losses: Core losses critically impact transformer efficiency during high-frequency operation. PC44 material exhibits extremely low core losses, effectively reducing transformer heat generation while improving efficiency.
• High saturation flux density: This property enables the core to withstand stronger magnetic fields, transferring more energy within the same volume - crucial for compact designs.
• Excellent frequency characteristics: PC44 maintains superior magnetic performance across broad frequency ranges, meeting diverse high-frequency application requirements.

These cores find extensive use in nearly all power supply equipment requiring high efficiency and stability:

• Switch-mode power supplies (SMPS): As critical components in modern electronics demanding exceptional efficiency and compactness, these cores significantly enhance SMPS performance.
• High-frequency power transformers: In high-frequency power systems, transformer performance directly affects overall power supply efficiency and stability. These cores effectively reduce transformer losses while improving efficiency.
• Inverters and converters: Widely used in renewable energy and power electronics applications, these cores improve conversion efficiency and reliability.
• Industrial power supplies: Requiring prolonged stable operation with high reliability demands, these cores effectively reduce heat generation while improving reliability.
• Inductors and other magnetic components: Beyond transformers, these cores also manufacture inductors and other magnetic components to enhance circuit performance.

Key specifications for this core include:

• Core type: EE25/13/7
• Material: PC44 ferrite
• Dimensions: 25mm × 13mm × 7mm
• Frequency range: Suitable for high-frequency applications

When selecting EE25/13/7 PC44 ferrite cores, consider these factors:

• Verify dimensions: Ensure core dimensions match your design requirements.
• Confirm material: Validate the core uses PC44 ferrite to guarantee performance.
• Choose reliable suppliers: Select reputable suppliers to ensure core quality.

Core losses represent a critical consideration in transformer design, referring to energy losses from hysteresis and eddy current effects when cores operate under alternating magnetic fields. These losses cause transformer heating, reduced efficiency, and potentially shortened lifespan.

• Hysteresis losses: Resulting from ferromagnetic material hysteresis, these occur when magnetic domain movement creates friction during field direction changes. Hysteresis losses correlate with hysteresis loop area.
• Eddy current losses: Caused by internal eddy currents induced when cores experience alternating magnetic fields, creating resistive losses. Eddy current losses increase with frequency squared.

PC44 ferrite material excels at minimizing both loss types, effectively reducing high-frequency core losses.

Permeability measures magnetic material magnetization ease, though it varies with frequency. At high frequencies, permeability declines as magnetic domains cannot respond quickly enough to field changes, potentially reducing transformer efficiency.

PC44 ferrite maintains good permeability across wide frequency ranges, meeting diverse high-frequency application needs.

Core magnetic properties change with temperature. At elevated temperatures, permeability decreases while core losses increase. PC44 ferrite offers excellent temperature stability, maintaining consistent magnetic performance across operational temperature ranges.

Selecting appropriate cores is fundamental to designing high-efficiency transformers. The EE25/13/7 PC44 ferrite core, with its low losses, high saturation flux density, excellent frequency characteristics, and temperature stability, represents an ideal high-frequency solution. Understanding core properties while considering application requirements enables optimal selection for creating efficient, reliable power supply devices.