74000 series flyback switch-mode transformers
- Technology
- Switch-mode transformers
- Partner
- Myrra
There are many different topologies for switch-mode power supplies/converters topologies, but the most popular is the flyback option. The typical structure of the transformer is based on high-frequency magnetic materials, (ferrite, amorphous, nanocrystalline, and alloy powder cores) and composed of a primary winding, one or more secondaries, and an auxiliary winding.
Designers design transformer parameters according to the controller that will be used in their project, therefore it is important that transformer design is aligned to the semiconductor’s characteristics.
Myrra standard 740xx product line has been developed according to the most popular circuit controller. They are compact, efficient, and cost-effective.
Exclusively using UL94-V0 materials, they offer high quality and allow a faster certification process.
Range features
A high level overview of what this range offers
- Primary/secondary insulation >= 4000V
- Creepage distance primary/secondary >= 6mm
- Ambient temperature up to 120°C
- Construction conforms to IEC950, IEC335, IEC61558-2-16 for reinforced insulation
- Certified class B UL electrical insulation system E113497-B1
- Fast modified standard products
- Range with and without aux winding
- Single or multiple outputs configurations
- Primary/auxiliary insulation >= 1500V
- Primary shielded option available
- Power handling range from 1W up to 200W
- Custom solutions available upon request
What’s in this range?
All the variants in the range and a comparison of what they offer
| Model | Core size | Max output power (W) | Number of outputs | Output voltages (Vdc) |
|---|---|---|---|---|
74004 – 74005 | E16-H | 1.7 | 1 | 4 – 7V/ 8 – 12V |
74290 – 74293 | E16-V | 1.5 – 3.1 | 1 | 3.3 – 6/ 7.5 – 15 |
74200 | E16-V | 5 | 2 | 3.3 – 7/ 8.0 – 17.0 |
74201 – 74203 | E16-V | 6 | 1 – 2 | 2 – 4/ 3 – 6/ 9 – 18 |
74294 – 74295 | E16-V | 9 | 1 | 3.3 – 6/ 7.5 – 15 |
74210 – 74214 – 74215 | E16-V | 12 | 2 – 3 | 3.3 – 7/ 4 – 6/ 8 – 17/ 12 – 18/ 15 – 30/ 19.2 – 28 |
74020 – 74021 – 74023 | EL19 | 16 – 18 | 2 and 5 | 3.3 – 7/ 8 – 16.5/ 2.8 – 3.8/ 4.25 – 5.75/ 10.2 – 13.8/ 15.3 – 20.7/ 25.5 – 34.5 |
74087 – 74089 | EF20 | 20 – 24 | 2 – 3 | 2.8 – 3.8/ 4.25 – 5.75/ 3 – 7.5/ 9 – 15/ 10.2 – 13.8/ 15 – 30 |
74030 | E25 | 30 | 3 | 3.3 – 7/ 8 – 16 |
74040 | ETD29 | 60 | 4 | 3.3 – 7/ 8 – 16.5 |
74043 | ERL28 | 60 | 5 | 2.8 – 3.8/ 4.25 – 5.75/ 10.2 – 13.8/ 15.3 – 20.7/ 25.5 – 34.5 |
74050 – 74060 | ETD34 – ETD39 | 90 | 4 | 3.3 – 6.5/ 8.5 – 17 |
74070 | ETD44 | 180 | 4 | 3.3 – 6.5/ 8.5 – 17 |
