Description
ETD39 High Frequency Transformer
Our ETD39 ferrite core single-phase high frequency transformers are core components for half-bridge switching power supplies, supporting operating frequency up to 100kHz.
The output voltage can be accurately customized by adjusting the turn ratio of primary and secondary windings. For power supplies above 200W, ETD39 core with 35mm core height perfectly meets national standard requirements, while it is also an ideal auxiliary transformer for equipment under 300W with 16mm core diameter option.
We provide full custom service for ETD39 transformers: winding turns, pin layout, 130℃/180℃ heat-resistant enameled wire and insulation structure can be modified according to your PCB circuit design.
Dimensions
| Type | Structure type | Dimension(mm) | Pin Row1(mm) | Pin Row2(mm) | Row Pitch | OD Pin(mm) | Note | ||||
| A | B | C | Pin | Pin Pitch | Pin | Pin Pitch | |||||
| ETD29-001 | Horizontal | 37 | 38 | 26 | 7 | 5.0 | 7 | 5.0 | 26 | ∅0.8 | |
| ETD29-002 | Vertival | 37 | 26 | 43 | 6 | 5.0 | 6 | 5.0 | 20.3 | ∅0.6 | |
| ETD29-003 | Vertival | 37 | 25 | 37 | 7 | 5.0 | 7 | 5.0 | 17.5 | ∅0.8 | |
| ETD34-001 | Vertival | 36 | 31 | 40 | 6 | 5.0 | 6 | 5.0 | 25 | ∅1.0 | |
| ETD34-002 | Vertival | 43 | 32 | 41 | 8 | 5.0 | 8 | 5.0 | 25.2 | ∅1.0 | |
| ETD34-003 | Horizontal | 41 | 41 | 31.5 | 7 | 5.0 | 7 | 5.0 | 25.2 | ∅1.0 | |
| ETD34-004 | Horizontal | 41 | 41 | 30 | 15 | 2.54 | 15 | 2.54 | 30 | ∅0.8 | |
| ETD34-005 | Horizontal | 43.5 | 38 | 30 | 16 | 2.5 | 16 | 2.5 | 25.5 | ∅0.8 | |
| ETD34-006 | Horizontal | 41 | 41 | 30 | 16 | 2.54 | 16 | 2.54 | 30 | ∅0.6 | |
| ETD39-001 | Vertival | 45.5 | 30 | 53 | 8 | 5.08 | 8 | 5.08 | 25.4 | ∅1.0 | |
| ETD39-002 | Horizontal | 46.5 | 45 | 36 | 8 | 5.0 | 8 | 5.0 | 30.4 | ∅1.0 | |
| ETD39-003 | Horizontal | 44 | 47 | 38.5 | 7 | 5.0 | 7 | 5.0 | 35.3 | ∅1.0 | |
| ETD44-001 | Vertival | 47 | 34.5 | 52 | 9 | 5.0 | 9 | 5.0 | 27.5 | ∅1.0 | |
| ETD44-002 | Horizontal | 50 | 52.5 | 40.5 | 9 | 5.0 | 9 | 5.0 | 36.8 | ∅1.0 | |
| ETD49-001 | Vertival | 55 | 41.5 | 58.5 | 9 | 5.0 | 9 | 5.0 | 27.5 | ∅1.0 | |
| ETD49-002 | Vertival | 56 | 38.5 | 58.5 | 10 | 5.0 | 10 | 5.0 | 30.5 | ∅1.0 | |
| ETD49-003 | Vertival | 56.5 | 40 | 58.5 | 11 | 5.0 | 11 | 5.0 | 27.5 | ∅1.0 | |
| ETD49-004 | Horizontal | 56.5 | 55 | 51.5 | 10 | 5.0 | 10 | 5.0 | 40.5 | ∅1.0 | |
| ETD49-005 | Horizontal | 56 | 59 | 43 | 10 | 5.0 | 10 | 5.0 | 40.7 | ∅1.0 | 2 slot |
| ETD54-001 | Vertival | 69 | 40 | 65 | 11 | 5.08 | 11 | 5.08 | 33 | ∅0.9 | |
| ETD54-002 | Horizontal | 63 | 63 | 46 | 11 | 6.08 | 11 | 5.08 | 45.9 | ∅1.0 | |
| ETD59-001 | Horizontal | 72.5 | 68 | 46 | 13 | 5.0 | 13 | 5.1 | 50.8 | ∅0.8 | |
Specifications of ETD39 High Frequency Transformer
| Parameter | Technical Data |
|---|---|
| Model | ETD39 Single Phase Switching Transformer |
| Operating Frequency | 10kHz ~ 200kHz |
| Output Power | Fully Customized |
| Operating Temperature | -40℃ ~ +125℃ |
| Storage Temperature | -25℃ ~ +85℃ |
| Storage Humidity | 30% ~ 95% RH |
ETD39 High Frequency Transformer Core Advantages
1. Uniform Current Distribution
This ETD39 transformer features multiple parallel secondary windings coupled to a single primary winding. Neglecting excitation current, the ampere-turns generated by each secondary winding match those of the primary winding perfectly.
This balanced characteristic delivers outstanding performance for parallel rectifier circuits: it achieves even winding current distribution without extra balancing resistors or auxiliary components, simplifying your circuit design greatly.
2. High Current Density
ETD39 series owns excellent temperature rise control. Thanks to reliable thermal performance, it supports high current density within a compact core package, saving PCB layout space for power supply equipment.
3. Ultra-high Conversion Efficiency
By precise control of leakage inductance, our ETD39 transformer realizes fast switching speed and minimal cross-conduction loss. The energy transmission loss between primary and secondary windings is extremely low, bringing overall high energy efficiency to your switching power supply.
4. High Power Density
With compact ferrite core size and superior heat dissipation capacity, ETD39 transformers can be tightly assembled together with semiconductors and inductors on PCBs to reach high power density. It supports up to 30A current output per module for industrial power equipment.
5. Low Manufacturing Cost
ETD39 transformer consists of a small quantity of standard low-cost components, together with simple assembly procedures. The finished unit brings obvious cost advantages for mass production compared with other core models.
6. Reduce Supporting Component Costs
Its balanced current output and high efficiency help cut the specification grade of peripheral matching components such as diodes, capacitors and heat sinks, lowering your overall BOM cost of the whole power supply system.
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