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EFD15 SMD High Frequency Flyback Transformer for PD Fast Charger
Place of Origin:
China
Brand Name:
Chipsen
Certification:
UL/CUL/ISO9001/ISO14001/RoHS/Reach/IATF16949
Model Number:
EFD15
Minimum Order Quantity:
1000
Price:
US$0.15-1.5
Packaging Details:
Carton 1: 25.5 X 21.5 X 21cm Carton 2: 43.5 x 24.5 x 21 cm
Delivery Time:
3-4 Weeks
Payment Terms:
T/T
Supply Ability:
10000000/Month
Inquiry Now
Get A Quote
Specifications
Highlight Features
Low Profile EFD15 Transformer
,High Power Density Flyback Transformer
,Ferrite Core SMD Transformer
Product Name:
EFD15 Transformer
Frequency:
1KHz-1MHz
Core Material:
PC40/PC44/PC95 Ferrite Core
Winding Material:
UL Approved Pure Copper Transformer
Input Voltage:
5V-480V
Output Voltage:
12V 24V 48V 60V 120V 240V
Operating Temperature:
-40~265
Power:
1W-30W
Mounting Type:
Horizontal/ Vertical/ PCB Mount
Warranty Period:
5 Years
Product Description
Low Profile EFD15 SMD High Frequency Transformer
Product Overview
The EFD15 (Economic Flat Design) SMD high-frequency transformer is a premier magnetic component specifically engineered for next-generation, high-density power electronic modules. As the demand for miniaturization in consumer and industrial electronics grows, the EFD15 stands out by offering a "flat" core geometry that significantly reduces the vertical profile without compromising on power throughput. It is the definitive choice for engineers designing ultra-slim adapters, compact IoT sensors, and high-efficiency LED drivers where every millimeter of PCB height is critical.
Technical Specifications
| Parameter Item | Typical Specification | Unit | Remarks |
|---|---|---|---|
| Core Model | EFD15 (SMD Type) | - | Economic Flat Design |
| Effective Area (Ae) | 15.0 | mm² | Standard for EFD15 core |
| Effective Path Length (Le) | 34.0 | mm | Standard for EFD15 core |
| Effective Volume (Ve) | 510.0 | mm³ | Total magnetic volume |
| Typical Power Output | 5 - 15 | W | Topology & Frequency dependent |
| Operating Frequency | 50 - 500 | kHz | Optimized for HF switching |
| Isolation Voltage (Hi-pot) | 3000 | VAC | Primary to Secondary, 60s |
| Operating Temperature | -40 to +125 | °C | Including self-heating |
| Mounting Type | SMD (Surface Mount) | - | Pick-and-place compatible |
| Height (Max) | 7.5 - 8.5 | mm | Ultra-low profile design |
| Footprint (Max) | 16.5 x 16.0 | mm | Including SMD terminals |
| Number of Pins | 8 / 10 / 12 | Pins | Customizable pinout |
| Safety Standards | UL 94V-0, RoHS, REACH | - | Global market compliance |
| Insulation Class | Class B (130°C) / Class F (155°C) | - | High reliability insulation |
Product Features
- Economic Flat Design (EFD): The core's unique flat shape provides an optimized cross-sectional area (Ae) with a minimal total height, typically keeping the finished component under 7.5mm to 8.5mm.
- High-Grade Ferrite Material: Constructed with premium Mn-Zn power ferrite materials (equivalent to PC40, PC44, or PC95), ensuring stable performance and low core loss across a wide frequency range (50kHz to 500kHz).
- SMD Compatibility: The rugged Surface Mount Device (SMD) terminal design ensures excellent co-planarity and high reliability during high-speed automated pick-and-place and lead-free reflow soldering processes.
- Customizable Winding Structures: The wide winding window of the EFD15 core allows for versatile multi-secondary designs and advanced insulation strategies, such as the use of Triple Insulated Wire (TIW).
Q: How does the EFD15 core geometry facilitate superior leakage inductance control compared to traditional EE-type cores?
A: The EFD15 features a wider and flatter winding window than standard EE cores. This elongated window allows for a broader "Sandwich Winding" (Interleaving) strategy. By interleaving the primary and secondary layers across a wider surface area, the magnetic coupling is significantly tighter. This structural advantage allows engineers to consistently reduce leakage inductance to less than 1.5% of the primary inductance, directly improving conversion efficiency and reducing voltage spikes on the switching MOSFET.
Product Applications
- PD Fast Chargers: Ideal for ultra-slim 10W-20W Power Delivery wall chargers.
- Smart Home & IoT: Providing isolated power for smart switches, thermostats, and wireless sensors.
- LED Lighting: Used in compact linear LED drivers and smart lighting modules.
- Industrial Modules: Powering isolated DC-DC converters for industrial communication and PLC modules.
Q: What is the primary thermal advantage of using the EFD15 SMD transformer in enclosed, low-airflow environments?
A: Thermal management is a major bottleneck in miniaturized designs. The EFD15's flat geometry provides a much higher surface-area-to-volume ratio compared to cubic core shapes. The wide, flat top of the core serves as a natural heat spreader. When used with a thermal pad, it can directly conduct heat to the device enclosure or a PCB heatsink layer much more efficiently. This superior heat dissipation allows the EFD15 to handle higher power densities with a lower temperature rise, ensuring a longer operational lifecycle in enclosed housings.
Product Advantages
The primary advantage of the EFD15 lies in its exceptional power-to-volume ratio. It enables designers to achieve "Titanium" levels of efficiency in a footprint that was previously only possible for much lower power ratings. Furthermore, the mechanical stability of its SMD footprint provides excellent resistance to vibration and thermal shock. From a manufacturing perspective, the standardized EFD15 format offers excellent supply chain stability and ease of second-sourcing, making it a reliable and cost-effective long-term solution for mass-produced electronics.
Company Profile
Chipsen Electronics Technology Co., Ltd., established in 2000, is a specialized manufacturer of high frequency transformer, low frequency transformer, toroidal inductor, SMD power inductor, super high current inductor, choke coil and switch. Chipsen has earned a strong reputation in domestic and international markets including North & South America, Europe and Southeast Asia.
As an ISO9001, ISO14001 & IATF16949 certified company, Chipsen maintains a professional management team committed to producing environmentally friendly and qualified products. Our products are certified by UL Class B/Class F/Class H, CQC and RoHS, and we hold 21 patents. These achievements stem from our strong R&D team, which provides various solutions for temperature reduction, noise cancellation, and coupled radiation conductivity.
Our products are widely used in various fields including new energy, PV, UPS, Robotics, smart home, security systems, health care and communication.
Vision: To Be Global Transformer Brand Supplier
Mission: Create Values for Customers and Society, Grow with Customers and Staff
Values: Customer First, Team Cooperation, Embrace Changes, Integrity, Creative & Happy
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