PCB Mount Horizontal EI57 Transformer Coupling Type Switching Power Transformer

1.Product Description

This PCB horizontally mounted Horizontal EI57 Power Transformer is an efficient coupling transformer designed specifically for switch mode power supplies (SMPS). Its core adopts classic EI-57 silicon steel sheet, which has excellent magnetic properties and high saturation magnetic flux density. The horizontal structure design enables it to be tightly attached and directly soldered onto the PCB board, greatly saving the vertical space inside the equipment, making it very suitable for use in compact switch mode power supply solutions with limited height.

As a coupling type transformer, it mainly plays a key role in energy transmission, electrical isolation, and voltage conversion in circuits, effectively ensuring the stability and safety of the power supply. This transformer has been carefully designed with the characteristics of low loss, low leakage inductance, and high coupling efficiency, which can significantly improve the overall conversion efficiency and power density of the power supply. It is an ideal choice for engineers when developing high-performance, high reliability AC-DC or DC-DC power modules.

The Five Core Functions of PCB Horizontal EI57 Power Transformer :

1. Energy Transfer&Power Conversion
This is its most fundamental function. Transformers efficiently transfer the high-frequency pulse energy generated by primary side switching transistors (such as MOSFETs) to the secondary side through the principle of electromagnetic induction, thereby achieving the required DC power output (such as 12V/5V/24V, etc.). The EI-57 iron core and coil design have been optimized for high-frequency switching mode, achieving efficient energy conversion.

2. Electrical Isolation
As a coupled transformer, it establishes a robust electrical isolation barrier between the primary (high voltage side) and secondary (low voltage side) circuits while achieving energy transfer. This can effectively prevent high voltage from entering the low voltage end, greatly improving the safety and anti-interference ability of the system, protecting the safety of backend loads and operators, and is a key component that complies with safety regulations such as UL and CE.

3. Voltage Transformation
By changing the turns ratio of the primary and secondary coils, the transformer can flexibly achieve step up or step down functions, providing the required output voltage for the switching power supply. Designers can customize winding schemes based on different input and output specifications, with strong adaptability.

4. Implement Impedance Matching
Transformers can change the equivalent impedance of a circuit. By designing a reasonable turns ratio, it can "reflect" the load impedance on the secondary side to the primary side, matching it with the optimal operating characteristics of the power switching device, thereby ensuring maximum power transmission to the load, reducing losses caused by reflected energy, and improving system efficiency and stability.

5. Core Reset&Energy Reset
In forward switching power supply topologies, transformers must undergo magnetic reset every working cycle to prevent magnetic core saturation. The design of the transformer (including possible reserved reset windings or utilizing its magnetic circuit characteristics) provides a path for the safe release of magnetic flux energy, ensuring that the transformer can reliably return to its initial state during each switching cycle, which is the foundation for the continuous and stable operation of the power supply.

2.Performance Characteristics

3.Other Recommended Produtcs

4.Company Profile