Transformers
October 27, 2015
Compact SMD push-pull transformers
TDK 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
Type | Transformation [N1:N2:N3:N4] | Sample voltages [V AC] | Inductance L (1 – 2) [µH] |
---|---|---|---|
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 |
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