Shenzhen Dowis Electronics Co.,Ltd
| Place of Origin: | CN |
|---|---|
| Brand Name: | Dowis |
| Certification: | CE, UL, RoHs, ISO9001, 16949 |
| Model Number: | ER28, ER series |
| Minimum Order Quantity: | 1000pcs |
| Packaging Details: | Carton Box |
| Delivery Time: | 3-4Weeks |
| Payment Terms: | T/T, L/C |
ER28 High-Frequency Transformer Manufacturer Customized DW3334
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. PROCESS OF WINDING
| Winding | Retaining Wall | Foot Position | WIre & Description | Ts | Winding Method | Groove Position | Insulation Tape | Tube | Method of entering Axle | Method of entering Axle | |||||
| Pin7-12 side | Pin1-6 side | Start | End | Start | End | Tape Type | TS | Start | End | ||||||
| N1 | / | / | -1 | -6 | TIW-3,φ0.50 mm×1 bar | 24 | Equally wind a layer | Between Pin1 & 2 | Between Pin5 & 6 | 22.0mm (Tea clour) | 1.1 | 21L×17mm | 21L×17mm | Pin1-6 towards | front |
| E1 | 4mm×1Ts | 4mm×1Ts | -4 | / | Lamination copper foil t0.05*W12*L43mm | 0.9 | In the middle | Between Pin3 & 4 | / | 22.0mm (light yellow) | 3.1 | 28L×15mm | / | ||
| N2 | / | / | -10 | -9 | TIW-3,φ0.50 mm×1 bar | 2 | Tightly wind next to PIN7-12 | Between Pin9 &10 | Bet ween Pin9 & 10 | 22.0mm (light yellow) | 3.1 | 21L×17mm | 21L×17mm | ||
| N3 | |||||||||||||||
| / | / | (7,8) | (11,12) | Lamination copper foil t0.15*W19*L265mm | 5 | In the middle | Between Pin7 & 8-8 & 9 | Between Pin10 &11-11 & 12 | 16L×15mm×2 bar | 16L×15mm×2 bar | |||||
| E2 | 4mm×1Ts | 4mm×1Ts | -4 | / | Lamination copper foil t0.05*W12*L60mm | 0.9 | In the middle | Between | / | 22.0mm (tea clour) | 1.1 | 28L×15mm | / | ||
| Pin3 & 4 | |||||||||||||||
| N4 | / | / | -6 | -3 | TIW-3,φ0.50 mm×1 bar | 24 | Equally wind a layer | Between Pin5 & 6 | Between Pin2 & 3 | 22.0mm (light yellow) | 3.1 | 21L×17mm | 21L×17mm | ||
3. ELECTRICAL CHARACTERISTICS
| Item | Test Terminal | Test Condition | standard request | Equipment | |||
| Semi-finished goods | Manufactured goods | QC Exam | |||||
| Inductance Test | 1 | 3 | 100KHz,0.3V | 2.7~3.4mH | 2.41~3.59mH | 2.4~3.6mH | TH1062 or Equal |
| Leakage Test | 1 | 3 | 100KHz,0.3V | 12uH Max | 12uH Max | 12uH Max | |
| ( short circus to other Pin) | |||||||
| Q Value | 1 | 3 | 100KHz,0.3V | 80Min | 80Min | 80Min | |
| Direct Current Resistance | 1 | 3 | DC 25℃ | 285mΩ max | 285mΩ max | 285mΩ max | TH2511 or Equal |
| 10 | 9 | 12mΩ max | 12mΩ max | 12mΩ max | |||
| 7,8 | 11,12 | 4mΩ max | 4mΩ max | 4mΩ max | |||
| Turns Test | All Winding | 20KHz,1V | 48:2:5(±0.2Ts) | CH3250 or Equal | |||
| Short Circus Test | Pin8~9 | ||||||
| High-Voltage Insulation Test | Pin1+3对 Pin7+9+10+12 | -50Hz-1mA | 3750Vac,2 Sec | 4500Vac,2 Sec | 3750Vac, 60 Sec | ||
| All Pin to Core | 2200Vac,2 Sec | 2600Vac,2 Sec | 2200Vac, 60 Sec | CJ2670 or Equal | |||
| Pin7+8 to Pin9+10 | 500Vac,2 Sec | 500Vac,2 Sec | 500Vac, 60 Sec | ||||
