☷ Product Description
The model naming of high-frequency transformers typically uses the core structure type as the core prefix, with suffix numbers representing core size or specification parameters. Different series correspond to differentiated application scenarios and performance characteristics. The following is a classification of mainstream models and key information based on core type:
▶ I. EE Series (Basic General Purpose)
The EE type is the most commonly used basic ferrite core structure, with a very wide range of applications covering switching power supplies, LED drivers, electronic device power supply, etc., featuring ease of winding and high cost-effectiveness.
• Common models: EE-13, EE-16, EE-19, EE-22, EE-25, EE-28, EE-35, EE-42, EE-50
• Model rule: The larger the suffix number, the larger the core size (height, center pillar cross-sectional area), and the higher the output power limit.
• Typical applications: EE-13/16 are suitable for small smart home devices, EE-42/50 can be used for main transformers in industrial-grade switching power supplies.
▶ II. PQ Series (Power Dense)
The PQ series has "high power density" as its core advantage, with a compact core structure and excellent heat dissipation performance. The numbers represent the core length × width dimensions, widely used in power adapters, industrial equipment, etc.
Common models: PQ2625, PQ3220, PQ3230
Model analysis:
• PQ2625 (26mm × 25mm): Compact size, suitable for smart homes, small inverters;
• PQ3220 (32mm × 20mm): Medium power scenarios, such as LED drivers, small power modules;
• PQ3230 (32mm × 30mm): High power requirements, used for industrial power adapters, high-frequency inverter equipment.
▶ III. EFD Series (Ultra-thin Flat Type)
Specifically designed for ultra-thin switching power supplies, using flat ferrite cores, balancing high power with small size, requiring higher precision for PCB mounting.
• Common models: EFD15, EFD20, EFD25, EFD30
• Application scenarios: Laptop power adapters, ultra-thin LED display power supply modules, portable electronic device power supplies.
▶ IV. ER/EC Series (Easy-to-Wind High Power Type)
The core center pillar is cylindrical, reducing winding difficulty and increasing winding cross-sectional area, thereby boosting output power. Suitable for switching power transformer, choke coil, etc.
Common models:
• ER series: ER2510, ER2834, ER3542, ER4042, ER4950
• EC series: EC2820, EC2828, EC34, EC39, EC40, EC49
▶ V. EDR Series (High Voltage Wide Frequency Type)
Features wide operating voltage (3V-1000V) and wide frequency range (20kHz-500kHz), with maximum power up to 3000W, compliant with multiple certifications such as UL, VDE, and supports customization.
• Common models: EDR20, EDR25, EDR26, EDR28, EDR39, EDR40, EDR2009, EDR2810
• Model rule: Some suffix numbers represent installation dimensions, e.g., "28" in EDR2810 corresponds to core height related parameters;
• Application scenarios: Industrial-grade high-voltage power supplies, high-power DC-DC converters.
▶ VI. Other Mainstream Series
• ETD series: Core structure suitable for high-frequency high-current scenarios, common models ETD34, ETD39, ETD44, ETD50, can be used in new energy power supply systems;
• RM series: Miniaturized cores, suitable for low-power signal coupling scenarios, models RM6, RM8, RM10;
• POT series: Excellent protective performance, suitable for harsh operating conditions, common POT3314, POT3230, POT40;
• EPC series: Ultra-small surface mount type, used in micro electronic devices, models EPC15, EPC17, EPC19;
• EF series: Relatively strong versatility, models EF12.6, EF20, EF25, suitable for power supplies of small audio-visual equipment.
☷ Product Advantages
▶ High Efficiency and Energy Saving: Optimized core and winding designs minimize core losses and copper losses, achieving energy conversion efficiency above 95%, helping end devices meet higher energy efficiency standards (e.g., 80 PLUS).
▶ High Power Density: High-frequency design significantly reduces the volume and weight of the transformer, making end devices more compact and lightweight, in line with the trend of miniaturization in electronic products.
▶ Excellent Stability and Reliability: Strict material selection, advanced manufacturing processes, and comprehensive testing procedures ensure long-term stable operation even under harsh conditions such as high temperature, high humidity, and frequent switching, resulting in a longer lifespan.
▶ Outstanding EMC Performance: Low leakage inductance design and optional shielding structures effectively suppress electromagnetic interference (EMI), helping the entire unit more easily pass electromagnetic compatibility certifications such as CE and FCC.
▶ Strong Customization Capability: Capable of rapid design and production based on the customer's specific circuit topology (e.g., LLC, Flyback, Forward, Full-Bridge), electrical parameters, mounting methods, and safety certification requirements (UL, VDE, CQC), providing a one-stop solution.
☷ Application Scenarios
Our high-frequency transformers are core components in the following fields:
▶ Switching Power Supplies (SMPS): Main power conversion transformers and drive transformers in various AC/DC adapters, server power supplies, communication power supplies, and industrial power supplies.
▶ New Energy Field: High-frequency isolation and drive modules in photovoltaic inverters, energy storage systems (ESS), and wind power converters.
▶ New Energy Vehicles: Inside on-board chargers (OBC), DC-DC converters, and charging pile modules.
▶ Industrial and Consumer Electronics: Frequency converters, servo drives, UPS uninterruptible power supplies, high-end audio equipment, LED driver power supplies.
▶ Communication Equipment: 5G base station power supplies and RF modules, network switch/router power supplies, optical modules.
▶ Medical Electronics: Medical power supplies, medical imaging equipment (e.g., X-ray machines), and other fields with extremely high requirements for safety and reliability.
