High-Quality EE-16-EE25 Power Transformers from China Suppliers & Factory - Low Loss, High Flux Saturation
Shape and External Dimensions (mm)
Electronic Specifications
| Core Shape | EE-16/14/5 | EE-19/16/5 | EE-25/20/6 |
| Central Column Area (Ae) mm² | 19.3 | 23.3 | 40.7 |
| Magnetic Circuit Length (Le) mm | 35.7 | 39.2 | 49.9 |
| Volume (Ve) mm³ | 687 | 687 | 2034 |
| Frame Type | Vertical | Vertical | Horizontal |
| Dimensions (W＊D＊H) mm | 18*16*17.5 | 22*16*19 | 28.0*22*24 |
| Maximum Output Power (VA) | 25 | 35 | 65 |
Note: The design is based on: 1. Forward model; 2. PC40 series ferrite; 3. Switching frequency: 100KHz.
Frequently Asked Questions
1. What are the main applications for these switching power transformers?
These transformers (EE-16 to EE-25 series) are widely used in LED lighting drivers, power adapters, telecommunications equipment, and small household electronics requiring efficient power conversion.
2. How do I choose between Vertical and Horizontal frame types?
Vertical frames (like EE-16 and EE-19) save PCB footprint area, making them ideal for compact devices. Horizontal frames (like EE-25) offer a lower profile, which is better for slim enclosures.
3. Why is PC40 series ferrite used in these specifications?
PC40 is a high-performance power ferrite material optimized for low core losses at high frequencies (up to 100KHz-300KHz), ensuring high efficiency in switching power supplies.
4. Can the output power be increased beyond the listed VA?
The listed VA is based on a 100KHz frequency and standard Forward topology. Increasing the switching frequency or improving thermal management can potentially allow for higher output power.
5. Are these dimensions compliant with standard PCB layouts?
Yes, the EE-16, EE-19, and EE-25 are industry-standard core shapes, designed to fit standard bobbins and PCB pin configurations for automated assembly.