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Add : Room 701, Building A1, No. 55 Runfa Road, Jiangning District, Nanjing, China
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The EFD20 Flyback Transformer is designed for high-frequency switching power supply systems utilizing flyback topology for efficient energy conversion and isolated power output. Its EFD20 low-profile ferrite core structure enables compact PCB integration while maintaining stable electrical performance.
Optimized for AC-DC conversion circuits, the transformer provides reliable energy storage, voltage conversion, and electrical isolation in compact SMPS designs.
The EFD20 platform is widely used in space-constrained power systems where efficiency, thermal stability, and long-term operational reliability are critical requirements.
Customized turns ratios, output power levels, insulation structures, and winding configurations are available according to customer specifications.
EFD20 low-profile ferrite core structure
Designed for flyback topology SMPS
Stable high-frequency power conversion
Reliable isolation and voltage transformation
Efficient energy storage capability
Compact PCB footprint design
Suitable for AC-DC power supply systems
Flexible customization support
AC-DC Switching Power Supplies
Adapter and Charger Systems
Industrial SMPS Units
LED Driver Power Supplies
Consumer Electronics Power Systems
Embedded Power Modules
Communication Equipment Power Supply
Physical Properties
| Order Code | VIN | Vout1 (V) | lout1 (A) | Vout2 (V) | lout2 (A) | Vout3 (V) | lout3 (A) | Vout4 (V) | lout4 (A) | Vaux (V) | L (μH) | n | ISAT (A) | Ls (μH) | VT (V(AC)) |
| INF-EFD20-4.5μH | 9-36V(DC) | 12 | 3 | - | - | - | - | - | - | 12 | 4.5 | 1:1.16:1.16 | 14 | 0.15 | 1875 |
| INF-EFD20-14μH | 18-100V(DC) | 12 | 2.5 | - | - | - | - | - | - | 12 | 14 | 2.5:1:1 | 11.5 | 0.21 | 4000 |
| INF-EFD20-15μH | 18-60V(DC) | 13 | 2.3 | - | - | - | - | - | - | 14 | 15 | 1.25:1:1.1 | 6.75 | 0.2 | 1500 |
| INF-EFD20-6μH | 20-48V(DC) | 5 | 6 | - | - | - | - | - | - | 10 | 6 | 3:1:2 | 9.5 | 0.3 | 1500 |
| INF-EFD20-8.3μH | 20-48V(DC) | 12 | 2.5 | - | - | - | - | - | - | 10 | 8.3 | 2:1:0.8 | 9 | 0.3 | 1500 |
| INF-EFD20-8μH | 20-48V(DC) | 15 | 2 | - | - | - | - | - | - | 10 | 8 | 1.5:1:0.67 | 12 | 1 | 1500 |
| INF-EFD20-8μH | 20-48V(DC) | 24 | 1.3 | - | - | - | - | - | - | 10 | 8 | 1:1:0.42 | 9.5 | 0.4 | 1500 |
| INF-EFD20-15μH | 30-75V(DC) | 5 | 6 | - | - | - | - | - | - | 10 | 15 | 3.5:1:2 | 9.5 | 0.55 | 1500 |
| INF-EFD20-14μH | 30-75V(DC) | 12 | 2.5 | - | - | - | - | - | - | 10 | 14 | 2.5:1:0.83 | 9.5 | 0.5 | 1500 |
| INF-EFD20-12μH | 30-75V(DC) | 15 | 2 | - | - | - | - | - | - | 10 | 12 | 2:1:0.67 | 11 | 0.4 | 1500 |
| INF-EFD20-12μH | 30-75V(DC) | 24 | 1.3 | - | - | - | - | - | - | 10 | 12 | 1.5:1:0.5 | 9 | 1 | 1500 |
Technical Specifications
| Main Category | Subcategory | Details |
| MOQ | Prototyping & Small-batch | 10 piece minimum order |
| Sample Service | Free proofing & custom service, 5 free samples (shipping at buyer’s cost) | |
| Bulk Order | 5,000 pieces and above with bulk pricing | |
| Lead Time | All Standard Components | Shipped within 5–7 working days |
| Custom Inductance / Pin Design (Sample) | Sample order confirmed within 5–7 working days | |
| Custom Inductance / Pin Design (Mass Order) | Shipped within 15–30 working days | |
| Payment Terms | Main Payment Term | T/T in advance, L/C at sight |
| Procurement Standard | Complies with global enterprise procurement standard for passive components | |
| Quality Deposit | No quality security deposit required | |
| Accepted Terms | FOB Shanghai / Nanjing / Hong Kong, T/T Advance | |
| Quality Assurance | Manufacturing Defects | Free replacement for issues caused by manufacturing defects |
| Inspection Report | Batch inspection reports available as certification upon customer request | |
| Packaging Specifications | Updated Packaging (2026) | Blister tray packaging; Sealed Tape & Reel for SMD products |
| Optional Packaging | Vacuum sealed packaging for customers with strict moisture-proof requirements |
