ER11.5 High frequency surface mount transformer DCDC module transformer
ER11.5
ER11.5 patch high-frequency transformer is a commonly used core magnetic component in small power equipment, belonging to the ER standard magnetic core series products, with a rated power of 10W, exquisite and compact size, suitable for internal circuit installation of various lightweight electronic products.
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ER11.5 is a surface‑mount small‑size ER power core with an elliptical (racetrack‑shaped) center leg. It is mainly used for SMD surface‑mount high‑frequency transformers. Comparable to EE13, it covers a power range of approximately 2‑6 W and is widely applied in low‑power switching power supplies, adapters, chargers, DC‑DC modules and auxiliary power supplies for household appliances.
Product parameters
| Rated Power | 10W | Cooling Method | Oil‑immersed self‑cooled |
| Number of power supply phases | Single‑phase | Frequency Characteristic | High‑frequency |
| Cooling form | Liquid/oil‑immersed | Voltage ratio | 220 |
| Brand | CXWON | Moisture‑proof methods | Open‑ended |
| Winding type | Three‑winding | Iron core type | ER core |
| Efficiency (η) | 95 | Appearance and Structure | Horizontal type |
Main transformer models：
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Core advantages of ER transformer
1. The ER magnetic core structure is streamlined, occupying less board space and suitable for thin and light electronic products, saving PCB layout space.
2. High-permeability core material, low high-frequency loss, small temperature rise, and high conversion efficiency, suitable for high-frequency conditions of switching power supplies.
3. Reasonable magnetic circuit design, precise leakage inductance control, good EMI filtering effect, strong electromagnetic compatibility.
4. Mainstream SMD mounting, suitable for SMT automated mounting machines, convenient welding, significantly improving production efficiency.
5. Multi-layer insulation winding, sufficient voltage rating, electrical isolation safety, in line with power safety standards.
6. High-quality materials, resistant to vibration, wide temperature range, and less prone to failure during long-term continuous operation.
7. From small power 3W, 5W to medium power specifications, flexible selection.
ER transformer real-shot details：
Typical application scenarios
Flowchart
Company Information:
FAQ
Q: What is a high-frequency transformer?
A: Used for energy transmission, voltage reduction/boost, and isolation at high frequencies (tens of kHz and above), with small size and high efficiency.
Q: What are the typical applications of high-frequency transformers?
A: Power adapter, switch power supply, laptop/phone charger, LED driver power supply.
Q: What is the difference between it and low-frequency transformers?
A: High frequency, smaller size, different magnetic core materials and winding processes result in different requirements for losses and heat dissipation.
Q: What are the key selection points?
A: Input/output voltage and current, operating frequency, insulation level, magnetic core material, duty cycle, and efficiency target.
Q: Safety precautions during use?
A: Pay attention to insulation level, heat dissipation design, EMI/EMC, and thermal management to avoid exceeding the rated current.
Risk Warning: High frequency switches are prone to generating EMI during operation and require compliant shielding and layout. Selection should consider thermal management and reliability.
