SI88240ED-IS Datasheet, PDF (24/48 Pages) Silicon Laboratories – QUAD DIGITAL ISOLATORS WITH DC-DC CONVERTER

Si88x4x
2.4. Transformer Design
Table 10 provides a list of transformers and their parametric characteristics that have been validated to work with
Si882xx/3xx products (input voltage of 3 to 5 V) and Si884xx/Si886xx products (input voltage of 24 V). It is
recommended that users order the transformers from the vendors per the part numbers given below. Refer to
AN892 and AN901 for voltage translation applications not listed below.
To manufacture transformers from your preferred suppliers that may not be listed below, please specify to supplier
the parametric characteristics as specified in the table below for a given input voltage and isolation rating.
Table 10. Transformer Specifications
Transformer
Supplier
Ordering Part # Input Turns Leakage
Primary
Primary Isolation
Voltage Ratio Inductance Inductance Resistance Rating
UMEC
TG-UTB02185s 3.0 – 5.5 V 4.0:1 105 nH max 2 µH ± 5% 0.05  max 2.5 kVrms
www.umec-usa.com
Coilcraft
www.coilcraft.com
TG-UTB02205s 24 V 3.0:1
TA7608-AL 3.0 – 5.5 V 4.0:1
800 nH max 25 µH ± 5% 0.135  max 2.5 kVrms
60 nH max 2 µH ± 10% 0.036  max 2.5 kVrms
24
Preliminary Rev. 0.6