Shenzhen Dowis Electronics Co.,Ltd
| Place of Origin: | CN |
|---|---|
| Brand Name: | Dowis |
| Certification: | CE, UL, RoHs, ISO9001, 16949 |
| Model Number: | EF25, EF Series |
| Minimum Order Quantity: | 1000pcs |
| Packaging Details: | Carton Box |
| Delivery Time: | 3-4Weeks |
| Payment Terms: | T/T, L/C |
EF25 High-Frequency Transformer Manufacturer Customized DW3510
Shenzhen Dowis Electronics Co., Ltd. is a professional manufacturer of electronic transformers, inductors, and filters integrating R&D, production, and sales. It is a national high-tech enterprise and has passed the IATF16949:2016 automotive industry quality management system certification, the product has passed the "UL""CQC" and other safety certifications. The products are widely used in communication equipment, new energy vehicles, industrial control equipment, high-power LED drives and other market areas. The industry has high visibility. In addition to the domestic market, but also exported to many countries in Europe and the United States.
In order to further expand production capacity, it has set up a special test area construction area in zhaoqing YueGui cooperation in 2018 of 14000 square meters of manufacturing center named ZhaoQing Sheng Xiang electronic technology co., Ltd. Its management technical team has rich experience in cooperating with customers from well-known domestic enterprises and overseas. The design of products can fully follow customer’s needs and services with a good quality control system, and it has been recognized by many famous enterprises as the core suppliers. We look forward to cooperating with you.
1. Drawing (Unit: mm)
2. Construction
3. Schematic Diagram
4. Process of winding
| Winding | Pin position | TS |
Method of winding | Groove position Insulation tape Tube | |||||||||||
| Start | End | Wire & description | Start | End | Tape type | TS | Start | End |
Method of entering axle |
Direction of axle |
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| N1 | 4 | (ROD) | 2UEW-B,φ0.25mm×2bars | 25 | Tightly wind a layer (The end wire is reserved for the length of N6 line and then cut off.) | Between Pin4,5 | Top | 16.0mm | 2.1 | / | 24L×15mm |
Pin towards left |
Front | ||
| N2 | 1 | NC | 2UEW-B,φ0.25mm×2bars | 20 | Sparsely wind a layer | Between Pin1,2 | hang | 16.0mm | 2.1 | / | / |
Pin towards right |
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| N3 | (8) | (7) | TIW-B, φ0.70mm×1bars | 8 | Double wound Tightly wound a layer | Between Pin7,8 | Between Pin6,7 | 16.0mm | 3.1 | 18L×10mm | 18L×10mm |
Pin towards left |
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| N4 | (10) | (9) | TIW-B, φ0.70mm×1bars | 8 | Between Pin9,10 | Between Pin8,9 | 18L×10mm | 18L×10mm | |||||||
| N5 | 1 | NC | 2UEW-B,φ0.25mm×2bars | 20 | Sparsely wind a layer | Between Pin1,2 | hang | 16.0mm | 2.1 | / | / |
Pin towards right |
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| N6 | (ROD) | 3 | 2UEW-B,φ0.25mm×2bars | 25 | Tightly wind a layer | Top skip | Between Pin3,4 | 16.0mm | 2.1 | / | / |
Pin towards left |
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| N7 | 1 | 2 | 2UEW-B,φ0.25mm×1bars | 7 | Sparsely wind a layer | Between Pin1,2 | Between Pin2,3 | 16.0mm | 3.1 | / | / | ||||
| N8 | (6) | (8) | TIW-B, φ0.25mm×1bars | 3 | Sparsely wind a layer | Between Pin6,7 | Between Pin7,8 | 16.0mm | 3.1 | 26L×13mm | 26L×13mm | ||||
5. Electrical Characteristics
| Item | Test terminal | Test condition | Standard requirement |
Equipment |
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| Semi-finished goods | Finished goods | QC Exam | ||||||||
| Inductance Test | 4 | 3 | 1KHz,1.0V | 1.1mH±17% | 1.1mH±19% | 1.1mH±20% |
TH1062 or equal |
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| Leakage Test | 4 | 3 |
1KHz,1.0V (short circuit to Pin6,7,8,9,10) |
70 uH max | 70 uH max | 70 uH max |
TH1062 or equal |
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| Direct Current Resistance | 4 | 3 | DC 25℃ | 488mΩ max | 488mΩ max | 488mΩ max |
TH2511 or equal |
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| 8 | 7 | 22mΩ max | 22mΩ max | 22mΩ max | ||||||
| 10 | 9 | 22mΩ max | 22mΩ max | 22mΩ max | ||||||
| 1 | 2 | 179mΩ max | 179mΩ max | 179mΩ max | ||||||
| 6 | 8 | 89mΩ max | 89mΩ max | 89mΩ max | ||||||
| Turn test | All windings | 20KHz,1V | 50:8:8:7:3(±0.2Ts) | 50:8:8:7:3(±0.2Ts) | 50:8:8:7:3(±0.2Ts) |
CH3250 or equal |
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| High-Voltage Test | Primary to secondary | AC-50Hz-1mA | 3000±10V,1~2sec | 3100±10V,1~2sec | 3000V,2sec |
CH3250 or equal |
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| Pin1+2 to Pin3+4 | AC-50Hz-1mA | 500±10V,1~2sec | 600±10V,1~2sec | 500V, 2sec | ||||||
| Pin6+7 to Pin9+10 | AC-50Hz-1mA | 500±10V,1~2sec | 600±10V,1~2sec | 500V, 2sec | ||||||
| All Pins to core | AC-50Hz-1mA | 1500±10V,1~2sec | 1600±10V,1~2sec | 1500V,2sec | ||||||
