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Si8282BD-IS Datasheet(PDF) 11 Page - Silicon Laboratories |
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Si8282BD-IS Datasheet(HTML) 11 Page - Silicon Laboratories |
11 / 43 page 2.13 Transformer Design The internal switch dc-dc (Si8281, Si8283) and external switch dc-dc (Si8282, Si8284) operate in different topologies and, thus, require different transformer designs. The table below provides a list of transformers and their parametric characteristics that have been valida- ted to work with Si828x products. It is recommended that users order the transformers from the vendors per the part numbers given below. To manufacture transformers from your preferred suppliers that may not be listed below, please specify to supplier the parametric char- acteristics as specified in the table below for a given input voltage and isolation rating. Table 2.2. Si828x Recommended Transformers Transformer Supplier Ordering Part # Input Voltage Turns Ratio Leakage Inductance Primary Inductance Primary Resistance Isolation Rating UMEC www.umec-usa.com UTB02257s 3.0–5.5 V 1:15:5 125 nH max 1.5 µH ± 5% 0.05 Ω max 5 kV UTB02241s 4.5–5.5 V 1:9:33.667 100 nH max 2 µH ± 5% 0.05 Ω max 5 kV UTB02253s 7–24 V 1.2:1.21 200 nH max 25 µH ± 5% 0.225 Ω max 5 kV Coilcraft www.coilcraft.com TA7788-AL 7–24 V 1:1.25:0.75 550 nH max 25 µH ± 5% 0.460 Ω max 5 kV Si8281/82/83/84 Data Sheet System Overview silabs.com | Smart. Connected. Energy-friendly. Preliminary Rev. 0.5 | 10 |
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