Compact SMT transformers target push-pull designs

The B82805 series of compact push-pull transformers are designed for a typical switching frequency of 250 kHz and operating temperature of between –25°C and 125°C. The 9 x 8 x 5.7-mm ferrite core devices have 500-V isolation. 

Five types have different turn ratios and primary inductance of 9.5 to 94 µH, with Vdt of 17.6 to 42 V-µs. Primary and secondary are center-tapped and have ratios ranging between 1:1 and 1:3.8, enabling voltage ratios of 5 in and 5 out or 3.3 in and 12 out to be implemented. From $3.20 ea/1,000.