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High Performance High Frequency Transformer Power Conversion Core Compact E28 Ferrite Switching Power Supply Transformer

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High Performance High Frequency Transformer Power Conversion Core Compact E28 Ferrite Switching Power Supply Transformer

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Supply Ability :	50000
Brand Name :	ZXY
Model Number :	ZXY-E28
Certification :	RoHS、ISO9001、CE
Price :	Negotiable
Delivery Time :	3-4weeks
Payment Terms :	L/C,D/A,D/P,T/T

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High Performance High Frequency Transformer Power Conversion Core Compact E28 Ferrite Switching Power Supply Transformer

Product Overview

The E28 high-frequency transformer is a high-performance power conversion core specifically designed for switching power supplies. It delivers exceptional efficiency and stability in a compact E28 ferrite package, making it an ideal solution for modern, space-constrained power applications that demand reliability.

Built on the EE28 ferrite core, this transformer is the cornerstone of high-performance switching power supplies. It stands out by offering high power density in a compact form, superior energy efficiency to reduce thermal stress, and excellent reliability for demanding applications — ensuring stable and efficient power conversion.

Core Functions & Operating Principles

The E28 high-frequency transformer is essentially an electromagnetic energy conversion and transfer device based on an EE28 ferrite core, playing a crucial role in the switching power supply circuit. Its main functions include:

1. Core Energy Function: Efficient Power Conversion and Transmission

Voltage/current conversion: Based on its turns ratio, the pulse-type high-frequency AC voltage/current on the input side (primary) is efficiently converted into the different voltage/current levels required on the output side (secondary) to meet load demand.
Energy transfer and storage: During each switching cycle, the energy of the power supply is coupled from the primary to the secondary through a magnetic field, with temporary storage and release of energy achieved in the topology (such as flyback).

2. Key Safety and System Functions: Electrical Isolation and Signal Coupling

Electrical isolation: This is its safety-critical function. By using magnetic coupling instead of electrical connection, a reliable high-voltage electrical isolation barrier is established between the primary (high-voltage side) and secondary (low-voltage side) to meet safety requirements (such as creepage distance and withstand voltage requirements in UL and CE certifications) and protect the safety of low-voltage equipment and personnel.
Signal feedback coupling: In designs with feedback loops, dedicated windings can be used to transmit isolated feedback signals (such as output voltage sampling) to achieve closed-loop control.

3. Derivative Performance Functions: Optimizing System Performance

Impedance matching: Implements impedance transformation between switching transistors (such as MOSFETs) and loads to maximize power transmission.
Suppressing common mode interference: By using a reasonable winding structure and shielding design, common mode electromagnetic interference (EMI) can be effectively suppressed, improving the electromagnetic compatibility of the system.
Multi-output: By designing multiple secondary windings, multiple sets of isolated or common-ground output voltages can be generated from a single transformer, simplifying the system architecture.

Performance Characteristics

Feature Category	Key Characteristics	Description / Benefit
Core & Material	EE28 Ferrite Core	Standardized size offering excellent cost-performance ratio and wide availability.
Core & Material	High-Frequency Ferrite Material (e.g., PC40, PC44)	Low core loss at high frequencies (kHz to MHz range), ensuring high efficiency.
Core & Material	Low Loss & High Saturation Flux Density	Enables higher power density and reliable operation under transient conditions.
Electrical Performance	High Efficiency (>90% typical)	Minimizes energy loss as heat, crucial for thermal management and energy-saving designs.
Electrical Performance	Excellent Coupling & Low Leakage Inductance	Improves energy transfer, reduces voltage spikes, and enhances overall regulation.
Electrical Performance	High Isolation Voltage (e.g., 3kV AC)	Provides safe galvanic isolation between primary and secondary, meeting safety standards.
Thermal & Reliability	Good Thermal Stability	Maintains stable performance across a wide operating temperature range (e.g., -40°C to +125°C).
Thermal & Reliability	Optimized Winding Structure	Reduces copper loss (I²R loss) and minimizes hot spots for better heat dissipation.
Thermal & Reliability	Robust Mechanical Construction	Resists vibration and thermal cycling, ensuring long-term reliability in harsh environments.
Application-Oriented Design	Compact Size & High Power Density	Ideal for space-constrained applications like adapters, LED drivers, and auxiliary power supplies.
Application-Oriented Design	Low Electromagnetic Interference (EMI)	Facilitates easier compliance with EMC regulations through controlled parasitics and shielding options.
Application-Oriented Design	Flexible Winding Configurations	Supports multiple outputs and various topology requirements (Flyback, Forward, etc.).
Compliance & Standards	RoHS & REACH Compliant	Meets environmental regulations for hazardous substances.
Compliance & Standards	Designed to Meet Safety Standards (e.g., UL, IEC)	Can be engineered and certified according to end-application requirements.

E28 high-frequency transformer front view with EE28 ferrite core

E28 transformer close-up of ferrite core and copper windings

E28 high-frequency transformer with pin terminals for PCB mounting

E28 transformer top view displaying core geometry and bobbin

E28 high-frequency transformer angled view highlighting compact package

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Company Profile

Manufacturing facility and production line for high-frequency transformers

Company workshop showing transformer assembly and quality control

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