HMS Anybus CompactCom B40-1 Design Manual page 77

Appendix E: Design Examples, Network Interface
• DC/DC transformer selection recommendations:
– 1:2.1 turns ratio
– 500 kHz switching frequency
– The transformer shall be able to deliver at least 100 mA on the network interface side
without saturating, at Anybus CompactCom min/max supply voltage, and at the
relevant min/max ambient temperature that is applicable
– Under the above circumstances, the transformer and rectifier output voltage must
allow the regulator tokeep the 5V rail inside a ±5% tolerance
Anybus ® CompactCom B40-1 Design Guide
75 (78)
HMSI-27-230 3.4 en-US