EE-16-EE25 Power Transformer: China Suppliers & Factory with Low Losses and High Safety Standards
Shape and External Dimensions (mm)
Electronic Specifications
| Core Shape | EE-16/14/5 | EE-19/16/5 | EE-25/20/6 |
| Central Column Area of the Core Aemm² | 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
What is the advantage of the PC40 series ferrite used in these transformers?
PC40 series ferrite is a high-performance material optimized for power applications, offering low core loss and high saturation flux density, which ensures efficiency at the 100KHz switching frequency.
Are both vertical and horizontal frame types available for all core shapes?
The standard configurations provide vertical frames for EE-16 and EE-19 cores to save PCB footprint, while the larger EE-25 core typically uses a horizontal frame for better stability. Custom orientations can be discussed based on volume.
How does the switching frequency affect the maximum output power?
These specifications are rated for 100KHz. Increasing the frequency can potentially increase power density, but it also increases core losses. Our design ensures a balanced performance for standard forward converters.
Can these transformers be used in topologies other than the Forward model?
While optimized for the Forward model as stated in the notes, these core shapes are versatile and can be adapted for Flyback or Push-Pull designs with specific winding adjustments.
What is the significance of the Central Column Area (Ae)?
The Central Column Area (Ae) is critical for determining the magnetic flux capacity. A larger Ae, like the 40.7mm² found in the EE-25, allows for higher power throughput (up to 65VA).