Symmetric magnetic core high performance isolation EP transformer High-power driver transformer
EP13
EP13 high-frequency transformer uses manganese-zinc ferrite closed-core. The housing-type core has its own shielding cavity. It is divided into two mainstream structures: plug-in and SMD (surface mount) type. The magnetic core is locked by metal steel clips.
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EP closed-type cavity magnetic core can effectively suppress magnetic leakage, with low leakage inductance and excellent EMI performance. It is wound with enameled copper wire or three-layer insulated wire, enabling safety isolation and withstand voltage between primary and secondary circuits upon initial assembly. The design is compact, with a small PCB footprint, making it suitable for high-density layout.
Product parameters
| Rated power | 8 - 15W (12W) | Cooling method | Liquid/oil immersion type |
| Number of power phases | Single-phase | Cooling method | Oil-immersed air-cooled type |
| Moisture-proof method | Open type | Brand | CXWON |
| Winding form | Auto-coupling | Overall structure | Horizontal type |
| Efficiency (η) | 90% | Core shape | EP type |
| Installation method | Soldering patch | Inductance | 127uH±10％ |
Main transformer models：
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Core advantages of EP transformer
1. EP series features a fully encapsulated magnetic core structure, resulting in extremely low magnetic leakage and minimal external electromagnetic radiation. This significantly reduces the difficulty of EMI debugging for the entire unit and minimizes interference to surrounding circuits.
2. It supports through-hole connectors and SMD (Surface Mount Device) versions. The SMD model can be directly subjected to SMT (Surface Mount Technology) reflow soldering.
3. The frame is equipped with isolation barriers, and can be paired with three-layer insulated wires to easily achieve high voltage resistance, meet creepage distance requirements, enhance insulation, and comply with the safety regulations for communication-type power supplies.
4. The closed magnetic circuit design results in a short magnetic path, a reasonable winding window layout, low leakage inductance, suppression of switching voltage spikes, reduction of absorption circuit losses, and improvement of power conversion efficiency.
5. It has high power density and a compact size. Within the power range of 10-30W, the body size is compact.
EP transformer real-shot details：
Typical application scenarios
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FAQ
Q: What is the typical power of the EP13 high-frequency transformer?
A: The conventional applicable power is 10 - 30W, which is affected by the working frequency and cooling conditions; it is not recommended to operate continuously at over 30W under full load; for higher power, it is recommended to upgrade to EP17.
A: The conventional applicable power is 10 - 30W, which is affected by the working frequency and cooling conditions; it is not recommended to operate continuously at over 30W under full load; for higher power, it is recommended to upgrade to EP17.
Q: How is the magnetic core of EP13 fixed?
A: It uses metal spring steel clamps to lock the two halves of the closed magnetic core. There is no plastic casing. The structure is compact.
Q: What is the normal temperature rise of the rated load for EP13?
A: Under good heat dissipation conditions, the temperature rise under the rated load should be ≤ 45K; excessive load or poor heat dissipation will result in higher temperature rise, decreased efficiency, and abnormal noise.
Q: What are the precautions for reflow soldering of the surface mount EP13?
A: It is necessary to strictly follow the reflow soldering temperature curve to avoid damage to the frame and the insulation layer of the enameled wire due to high temperatures; when selecting the product, it is necessary to confirm that it supports the SMT process.
Q: Why is the leakage inductance of EP13 relatively low?
A: The closed magnetic circuit structure has a short magnetic path, a reasonable window layout, and optimized winding arrangement. This design can effectively reduce leakage inductance, minimize switching spikes, and improve power supply efficiency.
