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EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
Specifications
Model Number :
EFD20
Operating temperature :
-40~265
MOQ :
1000
Delivery Time :
3-4 Weeks
Input Voltage :
5V-480V
Warranty period :
5 Years
Packaging Details :
Carton 1: 25.5 X 21.5 X 21cm Carton 2: 43.5 x 24.5 x 21 cm
Power :
1W-20W
Payment Terms :
T/T
Winding material :
UL Approved Pure Copper Transformer
Brand Name :
Chipsen
Product name :
SMD Transformer
Place of Origin :
China
Frequency :
1KHz-1MHz
Price :
US$0.15-1.5
Core material :
PC40/PC44/PC95 ferrite core
Supply Ability :
10000000/Month
Mounting Type :
Horizontal/ Vertical/ PCB mount
Certification :
UL/CUL/ISO9001/ISO14001/RoHS/Reach/IATF16949
Output Voltage :
12V 24V 48V 60V 120V 240V
Description
SMD EFD15 EFD20 Ferrite Core High Frequency Flyback Transformer Low Profile
EFD20 Series SMD High-Frequency Transformer: The Pinnacle of Compact Power Conversion

The EFD20 (Economic Flat Design) series represents a breakthrough in high-frequency transformer technology, specifically engineered to meet the demands of modern, slim-profile electronic assemblies. As a Surface Mount Device (SMD), the EFD20 is optimized for high-density power conversion modules where vertical space is at a premium but high power output is non-negotiable.

Technical Specifications
Parameter Item Typical Specification Unit Remarks
Ferrite Core Type EFD20 / EFD20/10/7 - Economic Flat Design
Effective Area (Ae) 31.0 mm² Standard EFD20 core
Effective Path Length (Le) 47.0 mm Standard EFD20 core
Effective Volume (Ve) 1460 mm³ Total magnetic volume
Power Output 15 - 25 W Typical for Flyback/Forward
Operating Frequency 50 - 500 kHz Optimized for HF switching
Dielectric Strength 3000 VAC Primary to Secondary (1 min)
Operating Temperature -40 to +125 °C Including self-heating
Mounting Type SMD (Surface Mount) - 8/10/12-pin options
Length (Max) 21.0 mm Standard SMD footprint
Width (Max) 20.5 mm Standard SMD footprint
Height (Max) 8.0 mm Low profile / slim design
Safety Standards UL 94V-0, RoHS, REACH - Halogen-free option
Insulation Class Class B (130°C) / Class F (155°C) - Customizable
Product Features

The EFD20 stands out due to its cross-sectional area consistency and optimized magnetic path. It features a low-profile construction that significantly reduces the overall footprint on the PCB. The SMD terminal design is ruggedized to withstand rigorous lead-free reflow soldering processes.

Furthermore, the EFD20 supports a wide operating frequency range—typically from 50kHz to 500kHz—and is constructed with high-grade ferrite materials that ensure low core loss even at elevated temperatures.

Technical FAQ: High-Frequency Performance
Q: Can the EFD20 transformer support high-speed switching frequencies (e.g., 200kHz+) used in GaN-based PD chargers?

A: Yes, the EFD20 is an ideal candidate for GaN (Gallium Nitride) and SiC (Silicon Carbide) high-frequency designs. We optimize the performance for 100kHz - 500kHz operation through:

  • High-Frequency Ferrite Materials: We utilize premium core materials that maintain low core loss and high saturation flux density at elevated frequencies and temperatures.
  • Skin Effect Mitigation: We employ Litz wire or multi-strand winding techniques, which drastically reduce AC resistance and prevent power loss caused by the skin effect.
  • Low Leakage Inductance: By using advanced automated winding technology, we consistently keep leakage inductance below 1.5% of the primary inductance.
Product Applications

The versatility of the EFD20 makes it indispensable across various high-tech sectors:

  • DC-DC Converters: Providing isolated power in telecommunications and server power supplies.
  • LED Lighting Drivers: Its slim design fits perfectly into narrow linear lighting tracks.
  • Automotive Electronics: Used in BMS (Battery Management Systems) and infotainment power modules due to its vibration-resistant SMD mounting.
  • Consumer Electronics: Ideal for ultra-thin adapters and PD (Power Delivery) chargers.
Product Advantages

The primary advantage of the EFD20 is its exceptional power-to-volume ratio. By utilizing a wider core window, it allows for better heat dissipation and the use of thicker wire or foil, which reduces DC resistance (DCR) and increases efficiency.

Technical FAQ: Thermal Management

Q: How does the EFD20's "Flat Design" optimize thermal management in slim-profile power modules?

A: The EFD (Economic Flat Design) core is specifically engineered for applications where vertical space is limited (typically <8.5mm). Its thermal advantages stem from its geometry:

  • High Surface-Area-to-Volume Ratio: The flat shape provides a significantly larger surface area relative to its volume compared to traditional EE cores.
  • Optimized Heat Path: The core's flat top provides a wide, stable contact surface for thermal interface materials or heatsinks.
  • Reduced Hotspots: The wider winding window allows for better separation of primary and secondary layers, reducing internal thermal accumulation.
EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
Company Strengths

Chipsen Electronics Technology Co., Ltd., established in 2000, is a specialized manufacturer of high frequency transformers, low frequency transformers, toroidal inductors, SMD power inductors, super high current inductors, choke coils, and switches.

Chipsen has earned a strong reputation in domestic and overseas markets including North & South America, Europe, and Southeast Asia. As an ISO9001, ISO14001 & IATF16949 certified company, we are 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, providing various solutions for temperature management, noise cancellation, and coupled radiation conductivity.

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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EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile

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Product Detail
Model Number :
EFD20
Operating temperature :
-40~265
MOQ :
1000
Delivery Time :
3-4 Weeks
Input Voltage :
5V-480V
Warranty period :
5 Years
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EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile
EFD20 SMD High Frequency Flyback Transformer with Ferrite Core and Low Profile

Dongguan Chipsen Electronics Technology Co., Ltd.

Verified Supplier
1 Years
guangdong, dongguan
Since 2007
Business Type :
Manufacturer
Main Products :
High Frequency Flyback Transformer, High Frequency SMPS Transformer, High Frequency Pulse Transformer
Total Annual :
28820000-29820000
Employee Number :
400~450
Certification Level :
Verified Supplier
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