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News
Transformers: Compact SMD push-pull transformers
2015-10-27 | ReturnTDK Corporation presents a new series of EPCOS SMD push-pull transformers featuring compact dimensions of just 9 mm x 8 mm x 5.7 mm. Windings with center taps are located on both the primary and secondary side. The series comprises five types with different transformation ratios ranging between 1:1 and 1:3.8. This enables voltage ratios of 5 V to 5 V or 3.3 V to 12 V to be implemented. Depending on the type, the inductance values of the primary winding are between 9.5 µH and 94 µH.
The transformers of the new B82805* series are designed for a typical switching frequency of 250 kHz and operating temperature range of between -25°C and +125°C. The RoHS-compatible components are suitable, for example, for smaller switched-mode power supplies using push-pull technology and for electrical isolation in industrial automation and process engineering applications.
Main applications
- Switch-mode power supplies using push-pull technology
- Electrical isolation in industrial automation and process engineering
Main features and benefits
- Compact dimensions of just 9 mm x 8 mm x 5.7 mm
- Five types with different transformation ratios for common voltages in industrial applications
- Typical switching frequency 250 kHz
Key data
|
Transformation |
Sample voltages |
Inductance |
B82805A0363A250 |
1:1:1.7:1.7 |
3.3:5 |
36 |
B82805A0773A250 |
1:1:1.1:1.1 |
5:5 |
77 |
B82805A0943A250 |
1:1:1.1:1.1 |
12:12 |
94 |
B82805A0952A250 |
1:1:3.8:3.8 |
3.3:12 |
9.5 |
B82805A0173A250 |
1:1:2.6:2.6 |
5:12 |
17 |
Further information on the products can be found under www.epcos.com/ifc_dc
Source:http://www.global.tdk.com/