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Brand: FERRTX
Origin: China
Certification: RoHS/ISO/UL/CE/IATF16949/CNAS
| Selling Units: | Piece/Pieces |
|---|---|
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Transportation: Ocean,Land,Air,Express
Place of Origin: China
Supply Ability: 2~8weeks
Certificate: RoHS/ISO/UL/CE/IATF16949/CNAS
Port: X,i,'
Payment Type: L/C,T/T
As electronic devices continue moving toward higher power density, compact size, and improved efficiency, high-frequency transformers have become a core component in modern switching power supply systems. Their unique advantages allow systems to maintain output power while significantly reducing size and weight.
From switching power supplies (SMPS) and DC-DC converters to communication equipment, industrial control systems, renewable energy systems, and automotive electronics, high-frequency transformers play a critical role in energy transfer, electrical isolation, and voltage conversion.
A high-frequency transformer is a magnetic component typically operating above 20 kHz, designed to transfer energy between circuits while providing electrical isolation.
In switching power supply systems, high-frequency transformers usually work together with switching devices such as MOSFETs and IGBTs to achieve:
Since core size is closely related to operating frequency, higher frequencies allow smaller core volumes, making high-frequency transformers essential for compact power supply designs.
The magnetic core determines how efficiently the transformer operates at high frequencies.
Modern high-frequency transformers typically use ferrite cores, offering:
As switching frequency increases, choosing the right core material becomes increasingly important for efficiency and thermal performance.
Proper winding design helps reduce:
While enhancing:
Optimized winding layouts can significantly improve system performance, especially in high-power applications.
Increasing the switching frequency allows smaller transformer size but introduces challenges:
High-frequency design requires balancing efficiency, size, and thermal performance rather than simply increasing frequency.
Based on FERRTX high-frequency transformer series at 100 kHz, reference power levels are as follows:
| Core Type | Reference Power @100kHz |
|---|---|
| TEE10/10 | 2.5 W |
| TEE13/12 | 3.1 W |
| EE25 | 22 W |
| EFD25 | 12 W |
| ER40/42 | 40 W |
| ETD49 | 140 W |
| ETD59 | 260 W |
Larger effective core area and volume allow higher power handling, lower magnetic saturation risk, and better thermal performance.
Using a core that is too small may result in:
Therefore, core selection should match the target power requirement rather than focusing solely on physical size.
From our engineering projects, we often see designers focus solely on reducing size when increasing switching frequency, overlooking core losses.
| Frequency | Reference Power |
| 50 kHz | 1.2 W |
| 100 kHz | 2.5 W |
| 300 kHz | 6 W |
| 500 kHz | 8.9 W |
| Frequency | Reference Power |
| 50 kHz | 70 W |
| 100 kHz | 140 W |
| 300 kHz | 250 W |
These examples show that while high
er frequency increases power density, core size and material must also be optimized to avoid excessive temperature rise and losses.
| Power Range | Recommended Core |
| 1–5 W | TEE10/10, TEE13/12 |
| 5–20 W | EFD16, EFD20, EE25 |
| 20–50 W | EFD25, ER28, ER35 |
| 50–150 W | ER40/42, ETD49 |
| 150–500 W | ETD59 |
In practice, we recommend first determining:
Then select the appropriate core type and size.
To support complete power conversion systems, high-frequency transformers are often used together with:
These magnetic components work together to improve efficiency, EMI performance, and overall system reliability.
High-frequency transformers typically operate above 20 kHz, while conventional transformers operate at 50 Hz or 60 Hz.
Higher operating frequencies require less magnetic material to transfer the same amount of power.
Ferrite materials offer low high-frequency losses and excellent magnetic performance.
Core selection should be based on output power, switching frequency, efficiency requirements, and allowable temperature rise.
Yes. Core material, winding structure, and PCB layout can all influence EMI performance.
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