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ETD44
INF
The ETD44 LLC resonant transformer is specifically engineered for high-efficiency resonant converter topologies, delivering superior energy transfer performance in modern switch-mode power supplies. Designed with a ferrite ETD44 core structure, it supports high-frequency operation while maintaining low core loss and excellent thermal stability.
Optimized for soft-switching applications, this transformer enables reduced switching losses and improved overall system efficiency, making it ideal for medium-to-high power AC/DC conversion systems.
Designed for LLC resonant converter topology
High efficiency with reduced switching losses
Wide frequency operation (typically 70kHz–120kHz)
Low leakage inductance with controlled magnetic characteristics
Excellent thermal performance for continuous operation
LLC resonant power supplies
High-efficiency AC/DC converters
LED drivers and lighting systems
Industrial power modules
Telecom and server power systems
The ETD44 platform supports flexible power levels (typically 150W–250W range depending on design) and is widely used in compact, high-density power systems requiring both performance and reliability.
Physical Propertie
| Order Code | VIN | Vout1 (V) | lout1 (A) | Vaux (V) | L (μH) | fswitch (kHz) | n | LS (μH) | lSAT (A) | RDC 1 (mΩ) | RDC 2 (mΩ) | RDC 3 (mΩ) | RDC 4 (mΩ) |
| INF-ETD44-475μH | 360-400V(DC) | 12 | 20.8 | 18 | 475 | 70-120 | 35:2:2:3 | 100 | 5 | 128 | 4 | 4 | 192 |
| INF-ETD44-400μH | 360-400V(DC) | 24 | 10.4 | 16 | 400 | 70-120 | 27:3:3:2 | 65 | 4.3 | 75 | 4.5 | 4.5 | 150 |
| INF-ETD44-400μH | 360-400V(DC) | 48 | 5.2 | 16 | 400 | 70-120 | 27:6:6:2 | 65 | 4.3 | 75 | 12.2 | 12.2 | 150 |
Technical Specifications
Schematics
Recommended Land Pattern
| 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 |
