EFD15 Series Specialized for switching power supplies Customized high-frequency energy-saving
EFD15
EFD15 Series is designed specifically for high-frequency switch, using EFD type high permeability ferrite cores and high-strength enameled wire winding.
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EFD15 adopts a regular layered winding process, featuring low leakage inductance and small switching spikes. It has excellent EMI interference suppression capabilities and can easily pass the overall machine EMC debugging. It supports the winding of conventional enameled wires and three-layer insulated wires. The primary and secondary insulation is reliable, meeting the conventional safety regulations for isolation requirements.
Product parameters
| Rated power | 11W | Cooling form | Dry type |
| Frequency characteristics | High frequency | Power phase number | Single phase |
| Cooling method | Oil-immersed self-cooling type | Voltage ratio | 220/12/3/5/8 |
| Moisture-proof method | Open type | Brand | CXWON |
| Core shape | EFD | Shape and structure | Horizontal type |
| Efficiency (η) | 85% | Core form | Coil type |
Main transformer models：
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Core advantages of EFD transformer
1. EFD15 ultra-thin flat horizontal magnetic core, with a low overall height, specially designed to fit thin power supply enclosures, saving PCB vertical space.
2. The window space is reasonable, the winding arrangement is convenient, the winding process is mature, the leakage inductance is controllable, and the EMI performance is good.
3. The magnetic core has good shielding effect, with low external electromagnetic radiation, reducing interference from surrounding components, and facilitating EMC debugging.
4. The magnetic core can be opened for air gaps as needed, effectively preventing magnetic saturation, and operating stably even when the load fluctuates.
5. RoHS environmentally friendly material, lead-free process, can use three-layer insulated wires, meeting enhanced insulation requirements, and suitable for power supply requirements in Europe and America.
EFD transformer real-shot details：
Typical application scenarios
Flowchart
Company Information:
FAQ
Q: What material is the core of the EFD15 high-frequency transformer?
A: Utilizing PC40 manganese-zinc ferrite core, a flat horizontal EFD structure, and equipped with UL94-V0 flame-retardant frame.
A: Utilizing PC40 manganese-zinc ferrite core, a flat horizontal EFD structure, and equipped with UL94-V0 flame-retardant frame.
Q: What are the differences between EFD15 and EF15?
A: The central column of the EFD magnetic core has a raised platform, which provides better positioning and makes assembly less prone to displacement; the overall outline is flatter, resulting in better EMI suppression.
Q: What are the common causes of increased temperature in EFD15?
A: Exceeding the rated power, overload, small copper wire diameter, excessive DCR (DC resistance), excessive leakage inductance, working frequency beyond the design range, insufficient heat dissipation.
Q: Can the EFD15 create an air gap?
A: Enable air gap in the magnetic core to enhance the DC biasing capability and prevent magnetic saturation under full-load high voltage conditions.
Q: What circuit topology is EFD15 suitable for?
A: Primarily used in flyback switching power supplies, it is the preferred choice for low-power isolated power supply solutions.
