All Client has designed a USB port with the DC power protected by a TI TPS2052B Current limiter:
* Component details: www.ti.com/product/TPS2052B/description<http://www.ti.com/product/TPS2052B/description> * Component is UL recognised component under QVGS2.E169910 which is based on UL 2367 2.5 Limited power sources c) a regulating network, or an integrated circuit (IC) current limiter, limits the output in compliance with Table 2B, both with and without a simulated single fault (see 1.4.14) in the regulating network or the IC current limiter (open circuit or short circuit). A single fault between the input and output is not conducted if the IC current limiter meets a suitable test program as given in Annex CC; Annex CC requires appears to require quite extensive testing of the component, and I can't tell whether a component recognised against UL2367 would meet this or not. The issue, is that if they s/c the protection component, the output may no longer be LPS - we have provision to fit a suitable fuse on the board, but would prefer not to, so would be grateful for any advice Thanks Charlie Charlie Blackham Sulis Consultants Ltd Mead House Longwater Road Eversley RG27 0NW UK Tel: +44 (0)7946 624317 Email: char...@sulisconsultants.com<mailto:char...@sulisconsultants.com> Web: www.sulisconsultants.com<https://outlook.hslive.net/owa/redir.aspx?C=02be3bf3e3a544d1bdf7b6c99fbd12f5&URL=http%3a%2f%2fwww.sulisconsultants.com%2f> Registered in England and Wales, number 05466247 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
