[URGENT] LTM8048 Withstand voltage

Hello Hiroyuki-

1. It could fail either short or open.  The internal IC (VOUT2) and/or diode (VOUT1) could “melt” if over-voltaged.  The failure mode would be unpredictable.  We typically spec the part with margin, but that should not be relied upon and is not guaranteed as we do not test beyond the abs max in the datasheet.
2. Voltage ratings
   1. Isolation Voltage Rating: 725Vdc, 1 sec. each polarity

1. all pins on input side are shorted together and all pins on output side are shorted together making it an effective 2-terminal device for the hi-pot test.

1. 1. Working Voltage: up to 160Vrms -> Per UL 60950-1 standard Table 2N -> Pollution degree 2 for printed circuit boards (0.44mm typical internal creepage)

Hello,

Thank you very much for your reply. But I don't understand A2 below

1. all pins on input side are shorted together and all pins on output side are shorted together making it an effective 2-terminal device for the hi-pot test.

Which pin does the working voltage refer to? I don't have a document about UL60950-1.

Regards,

Hiroyuki

It refers to the voltage between any input side pin and any output side pin as along as all abs max requirements are not violated.

It refers to the voltage between any input side pin and any output side pin as along as all abs max requirements are not violated.