EI25 Narrow Open Slot High Frequency Transformer (5+5 Pin) for SMPS & Compact Power Supply Design

Product Concept & Design Focus

The EI25 narrow open slot high-frequency transformer is specifically designed for compact and high-density power supply applications. Compared to standard EI25 structures, the narrow slot configuration enables more controlled winding distribution and optimized space utilization within the bobbin.

This design is particularly suitable for modern electronic systems where PCB space efficiency and electromagnetic performance are critical.

Narrow Slot Structure Advantage

The narrow open slot structure provides unique benefits in transformer design:

• Improved winding alignment and consistency

• Reduced leakage inductance through tighter coupling

• Better control of parasitic parameters

• Enhanced insulation arrangement capability

Ferrite EI cores inherently support efficient magnetic coupling and low loss, making them ideal for high-frequency operation.

Magnetic Efficiency & Loss Control

With optimized winding geometry and core structure, the transformer achieves efficient magnetic performance:

• Reduced core loss under high-frequency switching

• Lower eddy current and hysteresis losses

• Stable flux distribution across windings

Laminated or ferrite core materials help minimize energy loss and improve overall efficiency in power conversion systems.

Application Scenarios

This transformer is suitable for applications requiring compact size and high efficiency:

• Switching power supplies (SMPS)

• AC-DC and DC-DC converters

• Power adapters and chargers

• Industrial control electronics

• Smart home and consumer devices

Its compact and optimized structure makes it ideal for next-generation miniaturized electronics.

Technical Specifications

Customization & Procurement