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High Frequency Ferrite EE28 SMPS Transformer for LED Driver Power Supply Unit
Place of Origin:
China
Brand Name:
CHIPSEN
Certification:
ISO9001:2015, IATF16949:2016, U/L, ROHS, CQC, CE, cUL
Model Number:
EE28
Minimum Order Quantity:
500pcs
Price:
＄11.25-15.2/pieces,1000-10000pcs
Packaging Details:
Blister trays + standard export cartons; large orders on pallets. Optimized for safe transport. Custom options available.
Delivery Time:
7-21work days (Negotiable)
Payment Terms:
T/T
Supply Ability:
5000pcs
Inquiry Now
Get A Quote
Specifications
Highlight Features
High Frequency Ferrite EE28 Transformer
,SMPS Transformer for LED Driver
,EE28 Transformer for Power Supply
Certification:
ISO9001 2015, IATF16949 2016, UL, ROHS, CE, CUL
Frequency:
50Hz - 60Hz Low Frequency Transformer
Output Power:
24VA - 220VA
Output Voltage:
6V - 127V Customizable
Components:
Bobbin, Silicon Steels, Copper Wire
OEM/ODM:
Acceptable
Warranty:
5 Years
Highlight:
Compact PCB Footprint High Power Conversion Efficiency Cost-effective & Reliable Design
Product Description
High Frequency Ferrite EE28 SMPS Transformer for LED Driver Power Supply Unit
Product Overview
The EE28 High Frequency Transformer, specifically the CHIPSEN EE28-262-13669 series, represents the industry standard for high-density switching mode power supplies (SMPS). Featuring dual "E" shaped ferrite cores that form a closed magnetic circuit, this geometry optimizes magnetic flux utilization while minimizing electromagnetic interference (EMI). The 28mm core size offers the perfect balance between high power handling (typically 60W-80W) and compact vertical footprint essential for modern PCB layouts.
Designed for operation in the 10kHz to 300kHz frequency range, the EE28 utilizes advanced Mn-Zn ferrite core materials (PC40 or PC95) that enable rapid magnetic flux reversals with minimal heat dissipation. Manufactured under strictly controlled environments, each unit maintains minimal parasitic parameters—leakage inductance and distributed capacitance—providing circuit designers with a stable magnetic platform for complex power topologies including Flyback, Forward, and Half-Bridge converters.
Key Features
- High-Permeability Mn-Zn Ferrite Core: Utilizes high-grade PC40/PC44/PC95 cores providing high saturation magnetic flux density and low power loss at high temperatures, ensuring system stability during peak current surges
- 100% Pure Oxygen-Free Copper Winding: High-purity copper wire ensures lowest possible DC resistance, reducing copper losses and improving overall converter efficiency
- UL & International Safety Compliance: Built to meet UL (E332338), CE, and RoHS standards with UL-rated triple-insulated wire and flame-retardant bobbins (UL94-V0)
- Superior EMI/EMC Performance: Advanced winding techniques significantly reduce leakage inductance and common-mode noise, simplifying external EMI filter design
- Robust Vertical Mounting Design: 7+7 vertical pin configuration (customizable) ensures mechanical stability and automated PCB assembly compatibility
- Vacuum Pressure Impregnation (VPI): Specialized vacuum varnishing process removes air pockets, providing excellent moisture resistance and eliminating audible hum
- Optimized Thermal Dissipation: Core-out design allows natural convection airflow, preventing localized hot spots and ensuring long service life
Technical Specifications
| Technical Parameter | Detailed Specification |
|---|---|
| Model Number | EE28-262-13669 (Customizable Series) |
| Magnetic Core Material | Mn-Zn Ferrite (PC40 / PC44 / PC95 Grades) |
| Working Frequency | 10kHz - 300kHz (Optimized for Switching) |
| Output Power Range | 20W - 80W (Depending on Topology and Frequency) |
| Input Voltage (Primary) | 85V AC - 265V AC (Wide Range Universal Support) |
| Output Voltage (Secondary) | 3.3V / 5V / 12V / 24V / 48V (Customizable Multi-Tap) |
| Insulation Class | Class B (130°C) / Class F (155°C) Available |
| Dielectric Strength (Hi-Pot) | 3750V AC / 50Hz / 60s (Primary to Secondary) |
| Leakage Inductance | < 1% of Primary Inductance (Optimized Design) |
| Operating Temperature | -40°C to +125°C (Including Temperature Rise) |
| Bobbin Material | Phenolic / PBT (UL94-V0 Flame Retardant) |
| Termination Type | Vertical Through-Hole Pins (Tinned Copper) |
| Safety Standard | Compliant with UL E332338 / IEC 60950 / IEC 62368 |
Technical Analysis
The Leakage Inductance parameter is critical for power electronics engineers. Our EE28 targets less than 1% of total primary inductance, minimizing voltage spikes across switching MOSFETs and reducing EMI. This allows for smaller snubber circuits and higher efficiency.
The Dielectric Strength (Hi-Pot) of 3750V AC ensures safe isolation between high-voltage AC mains and user-accessible low-voltage DC sides, vital for medical and consumer electronics. The Working Frequency range up to 300kHz enables smaller output capacitors and inductors, reducing overall power supply size.
Advanced Construction Features
Material Science: High-purity Mn-Zn ferrite cores with narrow hysteresis loops reduce energy loss during switching cycles. Precision-ground mating surfaces maintain micron-level flatness, minimizing unintentional air gaps and magnetic flux leakage.
Advanced Insulation System: Multi-layered safety approach using high-strength phenolic resin bobbins and optional Triple Insulated Wire (TIW) for maximum safety margins without additional margin tapes.
Vacuum Impregnation Process: Specialized vacuum varnishing fills all wire gaps with insulation, improving thermal conductivity, increasing dielectric strength, and providing mechanical damping for silent operation.
Termination Excellence: High-conductivity copper pins with lead-free tin coating ensure optimal solderability at standard reflow or wave soldering temperatures. Vertical orientation maximizes creepage distance for safety in challenging environments.
Industry Applications
Consumer Electronics: Primary power conversion for laptop adapters, smart TV power boards, and USB-C Power Delivery chargers. Low EMI profile ensures compliance with FCC and CISPR standards.
Industrial Automation: Reliable performance in PLC power supplies, motor drive control boards, and industrial sensors. Class F (155°C) insulation options and ruggedized mounting support 24/7 factory operation.
LED Lighting: High-efficiency driver circuits for LED troffers and lighting systems. Maintains over 90% efficiency in constant current topologies, matching 50,000-hour LED lifespan.
Renewable Energy & IoT: Auxiliary power for solar inverters, wind turbine controllers, IoT gateways, and 5G small-cell base stations. High power density and reliability support decentralized infrastructure.
Manufacturer Profile
Chipsen Electronics is a professional manufacturer specializing in high-performance transformers and magnetic components, with over 26 years of manufacturing expertise. Founded in 2000, we operate 4 production bases covering 7,200 square meters with 400+ skilled employees.
Certifications & Standards: ISO9001, ISO14001, IATF16949, UL Class B/F/H, CQC, RoHS, and REACH. We hold 36+ utility patents supported by our robust in-house R&D team.
Company Advantages
- Full Service Customization: Rapid design support within 24-48 hours based on your specifications
- Extensive Product Portfolio: 200+ product types including transformers, inductors, filters, and common mode chokes
- Advanced Manufacturing: Automated winding and assembly machines improving efficiency by 8x
- Strict Quality Control: 100% testing including electrical performance, insulation, and reliability tests
- High Voltage & High Frequency Expertise: Specialized in 5KV to 40KV transformers and high-frequency power solutions
- Flexible MOQ & Fast Lead Time: Prototype to bulk production with 7-15 day lead times
- OEM/ODM Supported: Competitive factory direct pricing with rapid response R&D team
Frequently Asked Questions
How long does it take to prepare samples?
3-5 days for new samples, 1 day for samples in stock.
How are samples shipped?
When customers cover freight costs, we help choose the most economical shipping method.
Do you provide technical support for customized products?
Yes, our R&D team provides free technical support for customizations in voltage, power, inductance, dimensions, and core materials.
Do you accept flexible minimum order quantities?
We support flexible MOQ based on your industry and product requirements. Please share your application areas and estimated annual usage.
Can you ensure proper packaging for large sea shipments?
Yes, we provide goods packed in strong export cartons, on wooden pallets, and shrink-wrapped for protection.
Product Images
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