Hi group, The USB standard 1.1 or 2.0 defines that a USB host device must have an overcurrent protection " for safety reasons". If the aggregate current exceeds a preset value, which is 5.0 A, then the over-current protection circuit shall remove or reduces power to the attached devices.
The above definition looks quite similar to the requirements of LPS in IEC60950-1 but the wording LPS is not explicitely mentionned in the USB spec. Q: Can I assume that a USB interface is LPS ? Is there any other evidence available to support this view ? Thanks, Kris This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
